DE102007026807B4 - Bags for containing foodstuffs containing a line of weakness, methods of making such bags and their use for packaging or taking food - Google Patents

Abstract

A bag (1) based on a paper and / or composite paper material for containing food, comprising a front side (2) having an opening side edge (4) and a first side edge (8) and a second, opposite side edge (10) and a back side (12) having an opening-side edge (14) and a bottom-side edge (16) and a first side edge (18) and a second, opposite side edge (20), the front side (2) and the back side (12) in the region of their bottom side Rims (6, 16) at least partially directly or indirectly and in the region of their respective adjoining first or second side edges (8, 10, 18, 20) at least partially directly or indirectly connected, characterized in that
the bag (1) has at least one first weakening line (32) on the front and that the bag has at least one second weakening line (34) which is rectified from or spaced apart from the front and rear opening end (4, 14) (14). 2, 12) up to or towards ...

Description

The present invention relates to a bag based on a paper or composite paper material for holding foods, in particular unbaked or baked baked goods, baked baked goods, pizza, pizza corners, pancakes, crepes, burgers, potato pancakes, sandwiches and the like, comprising a front side with a opening-side edge and a bottom-side edge and a first side edge and a second, opposite side edge and a back with an opening-side edge and a bottom edge and with a first side edge or a second, opposite side edge, wherein the front and the back in the region of their bottom edges at least in sections directly or indirectly, as well as in the region of their respective adjoining first and / or second side edges are at least partially directly or indirectly connected. Furthermore, the invention relates to methods for producing such bags and their use for the packaging and food intake.

Bags for containing food are well known and are used in a variety of forms and for a variety of purposes. For example, the US 5,335,996 to take a packaging bag for hamburger or similar fast food products. Perforation lines are provided along and adjacent to the side edges from the opening end to the bottom end on the front side of this packaging bag, so that the front side can be completely torn open. With such bags, the packaged food product should be removed again without destruction.

From the JP 2003 335 348 A For example, a bag for food, for example rice, can be taken with a perforation seam running centrally on the front side from the opening end to the bottom end. Such a design is to allow easy opening of the bag, without falling out of the product present in the bag in the open state of this.

In the US 5,988,882 a sandwich bag is described, which is equipped with two parallel, extending from the opening end to the bottom end perforation on the front side of the bag. While the first perforation seam is adjacent to the side edge, the second perforation seam is spaced therefrom but still on the same longitudinal side pouch half of the pouch front. This perforation seams thus a relatively narrow bag strip is released. This construction should make it possible with the bag to hold the sandwich while eating can.

Finally, the reveals JP 2004 142 165 A a sandwich packaging with perforation lines on the back. Similar to the bag according to the US 5,335,996 the purpose of the perforation is to avoid damage or deformation of the packaged sandwich when unpacked.

In the US 4,777,054 a package for elongated food products, such as bananas, is described, which has a substantially rectangular shape and which has substantially at right angles to the longitudinal axis in the region of the upper edge extending over the entire width of the bag perforation. Further, this package has front and rear center above it from the transverse upper perforation line over a short section downwardly extending further perforation line, each split at a fork point in two separate perforation lines, which are away from each other to the respective corners of the bag in the bottom area extend. With the chosen attachment and geometry of the perforation lines, the upper halves of the elongate food products can be exposed from the package by simply tearing the bag sections separated by the perforation lines at the top without separating a severed bag section therefrom.

The DE 10 2005 033 774 A1 has a receiving device for particular Frittiergut the subject, comprising a circumferential, substantially closed wall, a filling or removal opening and a diametrical end wall. In this receiving device has at least one perforation attached. This perforation runs centrally on the front and back of the frying bag shown. By attaching at least one perforated seam, access to the product present in the receiving device should be safe and generous.

The US 4,915,235 has a frying bag to the object, which is made of a unitary piece of cardboard. In this container are on only one side substantially parallel to the longitudinal axis extending perforation lines, which should allow easier access to the contents of the container.

The generic packaging bags for ready-to-eat foods still leave something to be desired, in particular with regard to their operating safety and reliable handling, as well as with regard to their production. By means of perforation seams weak points or predetermined breaking points are installed in a packaging bag. These perforation seams have to be sufficiently strong on the one hand, so as not to be instantaneous On the other hand, to tear down the packaging process, and on the other hand, to be sufficiently weak to reliably prevent the bag from being torn in any location other than that intended, even after prolonged contact with a greasy, warm and / or moist food product.

It is an object of the present invention to provide packaging bags for in particular ready-to-eat foods and processes for their production which are not associated with the disadvantages of generic packaging bags described above and which in particular permit a simple and nevertheless reliable tearing of the packaging bag without In this case, the packaged food is impaired and wherein the torn packaging bag is still perfectly suitable as a napkin-like wrapper for holding the food product during consumption. It was a further object of the present invention to provide methods with which packaging bags of the type described above can be obtained in a simple manner, without, however, having to accept losses in the described requirement profile.

Accordingly, a bag according to the features of claim 1 has been found.

The bags according to the invention therefore each have at least one weakening line on the front and back, which are rectified and accordingly cooperate in such a manner that a section of the bag containing at least a portion of the front side and a section of the back side can be reliably and precisely demolished , As a rule, this succeeds particularly reliably when the lines of weakness on the front and rear sides extend over the entire length (from the bottom-side edge to the opening-side edge) or the entire width (from the first side edge to the second side edge). Such a portion of the bag releasing the article therein, z. B. food, can also be removed by the lines of weakness of the front and back z. B. start together on the respective bottom-side edge and can extend in the direction of the respective opening-side edges, without that the weakening lines extend to the opening side edge of the front and back. In this way, a reliable and easy tearing of the bag on, for example, bottom edge succeeds. Once the tear-off process has been started, in alternative embodiments, the bag section can then be torn off even in the areas which no longer have weakening lines. Of course, conversely, the weakening lines can also start at the respective opening-side edge of the front and back sides and interact in the manner described, without having to extend to the respective bottom-side edge of the front or rear side. Alternatively, it can also be provided that the weakening line on the front or rear side extends from the bottom to the opening-side edge, while the hereby cooperating weakening line on the rear or front side extends from the bottom or opening-side edge in the direction of the opening edge. or bottom edge extends without reaching this, as described above. In a bag lie in the unfilled state front and back to each other. Rectified first and second or third and fourth or fifth and sixth or seventh and eighth lines of weakness of the front and back cover this regularly a common or overlapping bag area or are arranged side by side or are at least partially superimposed. If the respectively rectified weakening lines lie next to each other at least in sections, they preferably have an average distance of not more than 30 mm, preferably not more than 15 mm.

The foregoing applies equally to lines of weakness extending from or spaced from the first or second side edge toward or to the second and first side edges, respectively, as well as lines of weakness extending from or spaced from the bottom or opening side edge extend toward or to the first or second side edge.

A line of weakness extending in the sense of the invention in the direction of an edge, be it the bottom-side or opening-side edge or a side edge, is not completely carried out up to this edge, but ends previously spaced from this edge. In general, this weakening line preferably terminates at a distance of at least 50 mm, in particular at least 15 mm, and preferably at least 5 mm, from the respective edge of the front or rear side. Begins a line of weakness spaced from an edge, the distance to this z. B. at least 50 mm, in particular at least 15 mm and preferably at least 5 mm.

A weakening line which extends from the bottom or opening-side edge of the front or rear side in the direction of the opening-side or bottom-side edge preferably has a longitudinal extension of at least one quarter, in particular at least one third and particularly preferably at least half of the Length expansion of the front and rear side between the bottom and the opening side edges. A line of weakness extending from the first or second side edge toward the second and first side edges of the front and / or rear side preferably has a length extension of at least one third, and more preferably at least half the width extension of front and / or back sides. or backside between the first and second margin.

In order to be rectified in the sense of the present invention, the first and second weakening lines do not necessarily have to be parallel and / or to cover each other. However, the parallel alignment is one of the preferred embodiments. Rectified lines of weakness can be z. B. also intersect one or more times, but can also be spaced from each other or side by side on the front or back run without intersecting, as long as the safe and reliable tearing off a bag section along both rectified lines of weakness.

The lines of weakness or perforation can basically be mounted in any form on the front and / or back, as long as an inventive purpose, eg. B. a bag section unproblematic and reliable to remove from the bag can be achieved. For example, the weakening lines or perforations may be wavy or have a zigzag pattern. The weakening lines or perforation seams are preferably arranged along a straight line.

The side edges of front and back are preferably substantially completely interconnected along their respective mutual abutment areas. In one embodiment, the bottom edges or ends of the front and back abut each other and are substantially completely interconnected or integrally merge into each other to form in this way the bag bottom.

A weakening line or perforation seam in the sense of the present invention can be embodied in many ways. Such weakening lines and perforation seams and / or lines and their production are familiar to the expert. Weakening lines and perforations in the sense of the present invention are also those which are due to a partial weakening of the material, for example the use of thinner or weaker material in certain areas, without having successive perforations or stings. A line of weakness or perforation according to the present invention thus permits reliable tearing of a portion of the front and back of the bag along that seam. Weakening lines in the sense of the present invention can be very thin, but also relatively wide, for example in the form of a weakening bar, comprising e.g. B. a width of several millimeters, executed. Of course, the width of a line of weakness on one and the same side and / or the width of rectified lines of weakness may also vary. A weakening line in the sense of the present invention, when z. B. present as perforation, may also be interrupted once or several times.

In preferred embodiments, with regard to the attachment of the first and second weakening lines, it may be provided that the bag has at least one first or second weakening line, in particular perforated seam, at the front and rear side, which essentially extend from the bottom end of the front or rear side to the opening end of front or Rear side, and / or that the bag front and back respectively has at least one first and second weakening line, in particular perforation, extending substantially from the bottom end of the front or back toward the opening end of front and / or that the bag has front and back respectively at least one first and second weakening line, in particular perforation, which is substantially from the opening end of the front or back toward the bottom end of Front and back cover, and / or that the bag front has at least one first line of weakness, in particular perforation, which extends substantially from the opening side end of the front toward the bottom end of the back and that the back at least a second Weakening line, in particular perforation seam, that extends substantially from the bottom end toward the opening end, and / or that the bag has at least one first line of weakness, in particular perforation, extending forwards from the bottom end toward the opening end and in that the rear side has at least one second weakening line, in particular perforation seam, which extends substantially from the opening end toward the bottom end, and / or that the bag has at least one first and second weakening line respectively front and rear. in particular perforation seam, which extend substantially at a distance from the opening-side end of the front or rear side toward the bottom end of the front or rear side, and / or that the front side of the bag has at least one first weakening line, in particular perforation seam , ie e extending from the opening end to the bottom end and that the back has at least one second line of weakness, in particular perforation, which extends at a distance from the opening end toward the bottom end, and / or that the bag at least a first front Weakening line, in particular perforation seam, which extends at a distance from the opening-side end towards the bottom end, and that the rear side has at least one second weakening line, in particular perforation seam, which extends from the opening end to the bottom end, and / or that the bag has at least one first line of weakening, in particular perforation, at the front, which extends from the opening end toward the bottom end, and in that the back has at least one second line of weakness which is spaced from de m opening-side end extends in the direction of the bottom end, and / or that the bag front has at least one first line of weakness, in particular perforation, extending from the bottom end towards the opening end, and that the back at least one second line of weakness , in particular perforation seam, which extends at a distance from the opening-side end towards the bottom end, and / or that the bag has at least one first line of weakening, in particular perforation, at the front side, which is spaced from the opening-side end in the direction of the bottom side End extends, and that the back has at least one second line of weakness, in particular perforation, which extends from the opening end towards the bottom end, and / or that the bag front side at least one first line of weakness, in particular Perforation seam, which extends at a distance from the opening-side end toward the bottom end, and that the back has at least one second line of weakness, in particular perforation, extending from the bottom end towards the opening end.

For example, if the rectified lines of weakness do not extend over the entire length or width of the bag, tearing of a unitary bag section can also be accomplished by grasping and pulling the bag against the opposite sides divided by the lines of weakness. In this way, the lines of weakness are not deliberately torn at the respective ends, but the lines of weakness preferably dissolve in the central region.

Furthermore, it can preferably be provided that the substantially rectified first and second weakening lines of the front and rear sides run essentially parallel to the first and / or second side edge of the front or rear side.

According to a preferred embodiment of the bag according to the invention, it is provided that the rectified weakening lines or perforation seams of the front and rear sides in the ready-to-use state lie, at least in sections, substantially on the same line. In this embodiment, the lines of weakness or perforation of the front and back are at least partially adjacent to each other or one above the other, if you put the front and back in the finished bag against each other. Of course, it is also possible that the rectified lines of weakness or perforation of the front and back are not substantially on the same line. For example, these lines of weakness or perforations from the front and back can be slightly offset from each other, for example, in the range of about 1 mm to 15 mm. Conveniently, the lines of weakness or perforation of the front and back are on average not more than 10 mm offset from each other. On the front and / or the back, one, two, three or more weakening lines or perforation seams may be present, preferably immediately next to one another. For many applications, it has proved expedient to use only one line of weakening or perforation on the front and back, in particular one which extends in each case from the opening side to the bottom edge or end. The weakening lines or perforation seams of the front and rear sides preferably extend substantially parallel to the longitudinal axis of the front or rear side.

In general, it is sufficient if the respective rectified lines of weakness on the front and back, for example, the first and second lines of weakness of the front and back are arranged such that a portion of the bag can be easily torn off by tearing along these cooperating lines of weakness. In this case, the weakening lines on the bottom or opening-side end of the front and rear sides particularly preferably merge into one another or rest against one another. According to the invention, one can also speak of cooperating first and second weakening lines or weakening line pairs.

According to one embodiment variant of the bag according to the invention, the weakening line or perforation seam of the front side and / or the perforation seam of the rear side can extend substantially centrally between the opposite side edges from the respective bottom end, in particular to the opening end of the front or rear side. Depending on the size of the bag and the geometry or type of food being packaged, it may also be beneficial for the front and back weakening line or perforations to be further spaced from the adjacent second side edges of the front and back than from the first one adjacent to each other Side margins of front and back.

Accordingly, the first and / or second front and back weakening lines are respectively further spaced from the second side edges of the front and back than the first side edges of the front and back surfaces.

Furthermore, it is provided that the first and second weakening lines or perforation seams of the front and rear side essentially have a distance from the first side edge of the front and back, which lies in the range of 1/8 to 3/8 of the width of the bag.

In the event that the bags have side wall elements, for example side gussets, the first and second lines of weakening of the front and back can preferably be arranged in the region which is folded in each case from the inner fold of the first side wall element, in particular the side gusset of the first side wall element, extending to the inner fold of the second side wall element, in particular the side fold of the second side wall element. Alternatively, the lines of weakness may also be slightly in the area of the front or back overlapping the folded gusset, for example up to 10 mm, preferably not more than 5 mm apart from the inner edge of the gusset.

In a further embodiment, the front and back sides of the bag according to the invention can be dimensioned and constructed such that their respective opening edges lie at approximately the same height, as is known from conventional bags.

According to a preferred embodiment, the opening edge or the opening end of the front side of the bag is below the opening edge of the back. It can be provided that the longitudinal extent of the back, measured from the bottom end to the opening end, is greater than the longitudinal extent of the front, measured from the bottom end to the opening end.

For example, the portion of the back side extending from the opening end of the front side to the opening end of the back side may be used to cover or wrap or roll up the packaged food from above. This protruding portion of the back can thus serve as a cover or closure of the bag. In this case, such bags are of particular advantage, in which the longitudinal extent of the back, measured from the bottom end to the opening end, at least twice, in particular at least three times as large as the longitudinal extent of the front, measured from the bottom end to the opening end.

According to a further embodiment of the bag according to the invention can be provided that the line of weakness extends over the entire length of the shorter front side from the bottom to the opening side edge, while the hereby cooperating weakening line of the back extends from the bottom edge in the direction of the opening side edge, without this to reach. For example, it is possible to execute the weakening line on the back side in exactly the same length as the weakening line on the shorter front side. Alternatively, the weakening line of the backside may also be made shorter or, preferably, longer than the weakening line of the shorter front side without again reaching the opening side edge of the rear side. In the described embodiment, the information for the front can also apply vice versa for the back and the information for the back and vice versa for the front.

Bags according to the invention are based essentially on a paper and / or composite paper material. For example, it is possible, the front and / or back in parts, z. B. as a viewing window, preferably a transparent plastic film material, for. B. of PP, PE or PET to execute. Furthermore, the front side and / or the rear side can also be equipped with at least one viewing window made of a transparent plastic film material. In this case, the perforation seam also, if required structurally, run through the viewing window material. According to one embodiment, the viewing window may also be an integral part of the composite paper material. This is achieved by partially omitting the paper web, whereby the film layer of the composite paper material is exposed. Laminated paper materials are generally laminates of paper and plastic film webs which have been laminated on one another. Laminated paper materials in the context of the present invention also include laminates of paper and metal foil webs, for example aluminum foil webs, or laminates of paper, plastic and metal foil webs, for example aluminum foil webs, or laminates of plastic and metal foil webs, for example aluminum foil webs.

The wall materials used for the bag, in particular the front wall or side and / or rear wall or side, can also identify a whole or in sections in a regular or irregular pattern a variety, in particular at least 15, perforations, slots, tears. These openings are generally intended to increase the breathability of the bag, so that z. B. warm, moist air escape from the sealed bag and fresh or cool, relatively dry air can penetrate into the bag to the packaged food product. In this way, it is possible on the one hand to prevent wetting through, ie a sticky consistency, and on the other hand drying out of the packaged products. For example, the wall openings described are at an average distance of their 5 to 25 mm, z. B. 10 mm, before. These openings can z. B. have an average area of 0.5 to 2 m ² .

According to a further development, the bags according to the invention may also comprise a bag bottom element which connects the, in particular the bottom end of, the front side with the rear side, in particular the bottom end, the bottom element having at least one ninth line of weakness, in particular perforation, which in Operative connection with the first or second weakening line of front and back stands. Ideally, the weakening line or perforation seam of the bottom element connects the weakening lines or perforation seams of front and back at their bottom ends.

Furthermore, the bags according to the invention may be provided with side wall elements between the first side edges of front and back and / or the second side edges of front and back. The side elements can represent gussets, which extend from the bottom end of the front and back. It is also possible that the side walls comprise at least two or more gussets.

In a particularly preferred embodiment, the bag according to the invention is formed essentially in one piece.

• a) Zurverfügungstellung einer Endlosbahn eines Beutelmaterials mit gegenüberliegenden ersten und zweiten Seitenrändern,
• b) Anbringen mindestens einer Schwächungslinie, insbesondere Perforationsnaht, entlang der Längsausrichtung der Endlosbahn beabstandet von den ersten und zweiten Seitenrändern,
• c) gegebenenfalls Umklappen mindestens eines Seitenrands, insbesondere der ersten und zweiten Seitenrandränder, in Richtung der Mittellängsachse der Endlosbahn unter Ausbildung mindestens einer Seitenfalte,
• d) Abtrennen separater Segmente von der Endlosbahn mittels Schneidens oder Stanzens,
• e) Aufeinanderklappen von ersten und zweiten Abschnitten des abgetrennten Segments unter Ausbildung einer Umschlagfalte, die sich zwischen den sich gegenüberliegenden ersten und zweiten Seitenrändern erstreckt, insbesondere senkrecht zu diesen verläuft, sowie unter Ausbildung von Vorder- und Rückseite des Beutels, und
• f) Befestigen der aneinander anliegenden ersten und zweiten Seitenränder von Vorder- bzw. Rückseite.

The object underlying the invention is further achieved by a method for producing a bag according to the invention comprising the steps:

• a) providing an endless web of bag material having opposite first and second side edges,
• b) attaching at least one line of weakness, in particular perforation, along the longitudinal direction of the continuous web, spaced from the first and second side edges,
• c) optionally folding over at least one side edge, in particular the first and second side edge edges, in the direction of the central longitudinal axis of the endless web, forming at least one side fold,
• d) separating separate segments from the continuous web by means of cutting or punching,
• e) collapsing first and second sections of the severed segment to form a fold which extends between the opposing first and second side edges, in particular perpendicular thereto, as well as forming the front and back of the bag, and
• f) attaching the abutting first and second side edges of front and back, respectively.

• a) Zurverfügungstellung einer Endlosbahn eines Beutelmaterials mit gegenüberliegenden ersten und zweiten Seitenrändern,
• b) beabstandetes Anbringen von Trennungslinien, insbesondere Perforationsnähte, entlang der Querausrichtung der Endlosbahn, die sich zumindest abschnittsweise von dem ersten Seitenrand bis zu dem zweiten Seitenrand erstrecken,
• c) Anbringen mindestens einer Schwächungslinie, insbesondere Perforationsnaht, entlang der Längsausrichtung der Endlosbahn beabstandet von den ersten und zweiten Seitenrändern,
• d) gegebenenfalls Umklappen mindestens eines Seitenrands in Richtung der Mittellängsachse der Endlosbahn unter Ausbildung mindestens einer Seitenfalte,
• e) Abtrennen separater Segmente von der Endlosbahn entlang der querverlaufenden Trennungslinien, insbesondere durch Zugbeanspruchung,
• f) Aufeinanderklappen von ersten und zweiten Abschnitten des abgetrennten Segments unter Ausbildung einer Umschlagfalte, die sich zwischen den sich gegenüberliegenden ersten und zweiten Seitenrändern erstreckt, insbesondere senkrecht zu diesen verläuft, sowie unter Ausbildung von Vorder- und Rückseite des Beutels, und
• g) Befestigen der aneinander anliegenden ersten und zweiten Seitenränder von Vorder- bzw. Rückseite.

Alternatively, a method may be provided, comprising the following steps:

• a) providing an endless web of bag material having opposite first and second side edges,
• b) spaced attachment of dividing lines, in particular perforation seams, along the transverse orientation of the continuous web, which extend at least in sections from the first side edge to the second side edge,
• c) applying at least one line of weakness, in particular perforation, along the longitudinal direction of the continuous web, spaced from the first and second side edges,
• d) optionally folding over at least one side edge in the direction of the central longitudinal axis of the continuous web while forming at least one gusset,
• e) separating separate segments from the continuous web along the transverse dividing lines, in particular by tensile stress,
• f) collapsing first and second sections of the severed segment to form an interfold fold extending between the opposing first and second side edges, in particular perpendicular thereto, and forming the front and back sides of the bag, and
• g) attaching the abutting first and second side edges of front and back respectively.

It can also be provided that method step c) precedes process step b) or that process steps b) and c) are carried out essentially simultaneously.

• a) Zurverfügungstellung einer Endlosbahn eines Beutelmaterials,
• b) Anbringen mindestens einer ersten und mindestens einer zweiten, von der ersten beabstandeten Schwächungslinie, insbesondere Perforationsnaht, jeweils entlang der Längsausrichtung der Endlosbahn beabstandet von den sich gegenüberliegenden Seitenbereichen,
• c) beabstandetes Anbringen von Trennungslinien, insbesondere Perforationsnähten, entlang der Querausrichtung der Endlosbahn, die sich zumindest abschnittweise von dem ersten Seitenrand bis zu dem zweiten Seitenrand erstrecken,
• d) Bilden eines Schlauches aus der Endlosbahn durch zumindest abschnittsweises Verbinden der ersten und zweiten Seitenbereiche unter Ausbildung von Vorder- und Rückseite,
• e) gegebenenfalls Ausbilden von einander gegenüberliegenden ersten und zweiten Seitenfalten,
• f) Abtrennen separater Segmente von der Endlosbahn entlang der querverlaufenden Trennungslinien, insbesondere durch Zugbeanspruchung,
• g) Ausbilden eines verschlossenen Bodenbereichs am bodenseitigen Ende von Vorder- und Rückseite.

Bags according to the invention can be further obtained by a method comprising the steps

• a) providing an endless web of a bag material,
• b) affixing at least a first and at least one second weakening line, in particular perforation seam, spaced apart from the first one, in each case along the longitudinal orientation of the endless web, at a distance from the opposite side regions,
• c) spaced attachment of dividing lines, in particular perforation seams, along the transverse orientation of the continuous web, which extend at least in sections from the first side edge to the second side edge,
• d) forming a tube from the continuous web by at least partially connecting the first and second side regions to form the front and rear side,
• e) optionally forming opposing first and second gussets,
• f) separating separate segments from the continuous web along the transverse dividing lines, in particular by tensile stress,
• g) forming a sealed bottom area at the bottom end of the front and back.

It is preferred that the first and second weakening lines are spaced such that they are substantially rectified in the finished bag on the front and back, respectively, and the substantially rectified lines of weakness of the front and back sides are in particular at least Sectionally, in particular for the most part, extend over overlapping, opposing areas of front and back.

Particularly preferably it is provided that the first and the second weakening line are so spaced from each other on the continuous web, that they are arranged in the finished bag on the front or on the back so that they are to bring to each other substantially to the plant and especially on the same line.

Dividing lines according to the invention are z. B. lines of weakness, which may be carried out in principle, as the above-described lines of weakness. Although regularly mounted transversely to the continuous web and to the transport direction of the continuous web, they do not represent predetermined breaking points during regular transport of the continuous web. Only with additional stress separation takes place along the endless web into separate segments, from which subsequently the final pocket is formed.

In particular, the one-piece design of the bag according to the invention allows extremely efficient mass production, even if this bag is to be executed with side walls, such as gussets. For example, a paper web spaced from the first side edge and parallel to it can be continuously provided with a perforated seam by means of a suitable tool. Subsequently, the paper web can be cut or punched into rectangular segments, whereupon a portion of the bag is turned over to form a preferably perpendicular to the side edges extending fold, which forms the bottom edge of the front and back. The folded first and second side edges of front and back can then be secured together, e.g. B. glued. In this manufacturing variant, the perforation seams of the front and back can be easily superimposed.

With the bag according to the invention, foodstuffs, in particular ready-to-eat foods, can be packed safely and reliably without further ado. In particular, it is possible to close the opening of the bag with the protruding portion of the back. In addition, by tearing off a portion of the bag along the perforations from the front and back, a napkin-like wrapper can be created to keep the food clean and safe when consumed. Of particular advantage here is that by tearing off a portion of the bag, the food product is directly suitable for consumption.

Further advantages, features and applications of the present invention will become apparent from the following description of a preferred embodiment in conjunction with the accompanying drawings. In these drawings show

1 a schematic plan view of a bag according to the invention,

2 a schematic plan view of an alternative embodiment of a bag according to the invention,

3a ) to e) schematic plan views of individual stages of manufacture of the bag according to the invention 1 according to a manufacturing method according to the invention and

4a ) to f) are schematic plan views of individual stages of production of an alternative embodiment of a bag according to the invention according to an alternative manufacturing method according to the invention.

1 is a schematic plan view of a bag according to the invention 1 refer to. At the bag 1 it is a gusseted bag which is shown in the folded state. The front 2 has an opening edge 4 a bottom edge 6 and the opposing first and second side edges 8th and 10 , Furthermore, the bag has a back 12 with an opening-side end 14 , a bottom end 16 and opposing first and second side edges 18 and 20 , In the illustrated embodiment, the bottom side edges fall 6 and 18 from the front and back substantially together and form an envelope fold. At this point, the essentially one-piece is the bag 1 forming film web has been folded, so that front and back 2 respectively. 12 come into contact with each other. In the illustrated embodiment, the bag is made of a composite paper made of a paper layer and a laminated plastic film layer. While the paper layer at the front 2 facing the viewer, you look at the not covered by the front section 30 the back 12 on the laminated plastic material. The side edges of front and back side gussets join. Here are in the marginal areas where the gussets 22 and 24 the back 12 with the gussets 26 and 28 the front 2 fall together, connected together, preferably by means of gluing. The gussets 26 and 28 are as they are on the inside of the front 2 be present and thus covered by this, by dotted lines 27 respectively. 29 been identified. Due to the use of gussets, the bag can be unfolded without further, to accommodate even larger food products, the z. B. extend from the first side edge to the second side edge of the bag. In the illustrated embodiment of a bag according to the invention 1 are front and back 2 and 12 not uniform sized. Rather, the opening-side end sticks out 14 the back 12 far beyond the opening end 4 the front 2 out. This addition through the back 12 provided section 30 can be used to cover or wrap the food product present in the bag, whereby at least partially a multilayer structure of the packaging is formed. This multi-ply has proven to be very beneficial, especially in moist or very greasy foods, but can be safely prevented by wetting moisture or leakage of fat. Furthermore, lie on the front 2 and the back 12 of the bag 1 Perforationsnähte 32 respectively. 34 in front. Both perforation seams extend in the illustrated embodiment from the respective bottom side to the opening side end of the front and back. Laying the front and back 2 and 12 to each other, come in the illustrated embodiment, the perforation seams 32 and 34 essentially to the plant, ie they are superimposed. The perforation seams 32 and 34 are substantially parallel to the side edges of front and back and spaced farther from the second side edges of front and back than from the first side edges of front and back. Is now a food product in the bag 1 before, advantageously wrapped with the section 30 , By simply tearing off a bag portion along the perforations, the food can be partially uncovered. Although food products such. B. sandwiches can be wrapped several times in the illustrated embodiment with the protruding portion of the back, manages a safe and accurate demolition under partial release of the food. Here the user is given the choice, either the narrower strip 36 in order to have as much bag material as possible for the safe keeping of the food available. Alternatively, the narrower section can also be used 38 which remains after the tearing of the bag along the perforations, are used to hold the food. In this way, always clean consumption of moist or greasy products, without the user at risk of becoming dirty.

2 shows an alternative embodiment of a bag according to the invention 1 in which, unlike the bag according to 1 the front 2 relative to the back 12 occupies a larger area, resulting in the free section 30 the back 12 reduced.

The 3a ) to e) disclose by way of example and in simplified form the production process of a bag according to the invention 1 , as in 1 shown. First, in this variant, a so-called endless composite paper web 3 made available ( 3a )), in which via a suitable perforation tool extending parallel to the side edges perforation 33 is inserted ( 3b )). Subsequently, the marginal areas of the composite paper web are also automatically folded over or folded in order to form side gussets ( 3c )). Of course, the steps 3b ) and 3c ) can also be carried out in reverse order or at the same time. In a next step, the film web 3 cut in the manner perpendicular to the side edges that substantially rectangular sections 5 are obtained with a length extension equal to the sum of the front and back lengths (see 3d )). Then, a portion of the separated film web to form an envelope fold 7 , (whose position is indicated by dashes in 3d )). In the area where the gussets 23 and 25 the separated film web come to rest on each other, an adhesive has been previously at least partially abandoned. By pressing on each other in each case in area superimposed gussets, a sufficient bond to form a bag according to the invention is produced ( 3e )). Since the separated film web has not been folded in the middle, an overhanging section remains 30 at the back 12 , As could be shown, the bag according to the invention 1 be obtained over only four process steps.

4a ) to f) exemplify in simplified form an alternative manufacturing process of a bag according to the invention 1 , In this variant, a so-called endless composite paper web 3 made available ( 3a ), in which via a suitable perforating tool from the first side edge to the opposite second side edge transverse perforation seams 40 be inserted ( 4b ). Subsequently, a parallel to the side edge extending perforation via another perforation tool 33 inserted ( 4c ). The steps 4b ) and 4c ) can also be implemented in reverse order. In a next step, individual, substantially rectangular sections 5 from the continuous web along the perforation seams 40 , For example, by means of tensile stress, separated. So can the tensile stress on the bottom reproduced perforation 40 acts to be selectively increased, resulting in a tearing to form a so-called blunt edge. The edges created in this manufacturing process are usually not suitable to produce cuts to the operator or the user. The separated sections 5 can then to form an envelope fold 7 (whose position is indicated by dashes in 4e )). In the areas in which the separated film webs come to rest on their inner sides at the respective side edges to each other, an adhesive has been previously applied at least in sections. By pressing the superimposed side edges together, a sufficient bond is produced to form a bag according to the invention ( 4f ). Since the separated film web has not been folded in the middle, an overhanging section remains 30 at the back 12 , Unlike the bag according to 3e ) the bag has according to 3f ) not over gussets.

The features of the invention disclosed in the foregoing description, in the claims and in the drawings may be essential both individually and in any combination for the realization of the invention in its various embodiments.

LIST OF REFERENCE NUMBERS

1

bag

2

front

3

Continuous composite web

4

Opening edge of the front

6

bottom edge of the front

7

sulcus

8th

first margin of the front

10

second margin of the front

12

back

14

Opening edge of the back

16

bottom edge of the back

18

first edge of the back

20

second margin of the back

22

first gusset the back

24

second gusset of the back

26

first gusset of the front

23

first gusset of the continuous composite paper web 3

27

hidden gusset of the front

28

second gusset of the front

25

second side fold of the continuous composite paper web 3

29

hidden gusset of the front

30

protruding section of the back

32

Perforation seam of the front

33

perforation seam

34

Perforation seam of the back

36

first tear-off section of the bag

38

second tear-off section of the bag

40

transverse perforation lines

Claims (33)

Bag ( 1 ) based on a paper and / or composite paper material for holding food, comprising a front side ( 2 ) with an opening-side edge ( 4 ) as well as a first margin ( 8th ) and a second, opposite side edge ( 10 ) and a back ( 12 ) with an opening-side edge ( 14 ) and a bottom edge ( 16 ) as well as a first margin ( 18 ) and a second, opposite side edge ( 20 ), the front side ( 2 ) and the back ( 12 ) in the region of their bottom edges ( 6 . 16 ) at least in sections, directly or indirectly, as well as in the region of their respective first or second margins ( 8th . 10 . 18 . 20 ) at least partially directly or indirectly connected, characterized in that the bag ( 1 ) on the front side at least one first weakening line ( 32 ) and that the bag has at least one second weakening line ( 34 ), which are rectified from or spaced from the opening end (FIG. 4 . 14 ) from front and back ( 2 . 12 ) up to or towards the bottom end ( 6 . 16 ) from front and back ( 2 . 12 ), that the substantially rectified first and second weakening lines ( 32 . 34 ) from front and back ( 2 . 12 ) a distance from the first side edges ( 8th . 18 ) from front and back ( 2 . 12 ) in the range of 1/8 to 3/8 of the width of the bag ( 1 ) is that the substantially rectified first and second weakening lines ( 32 . 34 ) from front and back ( 2 . 12 ) further from the second margins ( 10 . 20 ) from front and back ( 2 . 12 ) are spaced apart from the first side margins ( 8th . 18 ) from front and back ( 2 . 12 ), and that the opening edge ( 4 ) of the front ( 2 ) below the opening edge ( 14 ) the back ( 12 ) is present. Bag ( 1 ) according to claim 1, characterized in that the respectively substantially rectified weakening lines ( 32 . 34 ) from front and back ( 2 . 12 ) have an average distance of not more than 30 mm or not more than 15 mm. Bag ( 1 ) according to claim 1 or 2, characterized in that the respectively substantially rectified weakening lines ( 32 . 34 ) from front and back ( 2 . 12 ) At least partially successive to the plant can be brought. Bag ( 1 ) according to one of the preceding claims, characterized in that the respectively substantially rectified lines of weakness ( 32 . 34 ) from front and back ( 2 . 12 ) at least partially parallel. Bag ( 1 ) according to one of the preceding claims, characterized in that the weakening lines ( 32 . 34 ) are at least for the most part or completely rectilinear, wavy or zig-zag-fömig. Bag ( 1 ) according to one of the preceding claims, characterized that the bag ( 1 ) front and back side at least one first and second weakening line ( 32 . 34 ) extending from the bottom end ( 6 . 16 ) of front and back side ( 2 . 12 ) to the opening end ( 4 . 14 ) of front and back side ( 2 . 12 ), or that the bag ( 1 ) front and back side at least one first and second weakening line ( 32 . 34 ) extending from the bottom end ( 6 . 16 ) of front and back side ( 2 . 12 ) towards the opening end ( 4 . 14 ) of front and back side ( 2 . 12 ), or that the bag ( 1 ) front and back side at least one first and second weakening line ( 32 . 34 ) extending from the opening end of ( 4 . 14 ) Front and back side ( 2 . 12 ) towards the bottom end ( 6 . 16 ) of front and back side ( 2 . 12 ), or that the bag ( 1 ) on the front side at least one first weakening line ( 32 ) extending from the opening end ( 4 ) of the front ( 2 ) towards the bottom end ( 6 ) and that the back ( 12 ) at least one second weakening line ( 34 ) extending from the bottom end ( 16 ) towards the opening end ( 14 ), or that the bag ( 1 ) on the front side at least one first weakening line ( 32 ) extending from the bottom end ( 6 ) towards the opening end ( 4 ) and that the back ( 12 ) at least one second weakening line ( 34 ) extending from the opening end ( 14 ) towards the bottom end ( 16 ), or that the bag ( 1 ) front and back side at least one first and second weakening line ( 32 . 34 ) spaced from the opening end (FIG. 4 . 14 ) of front and back side ( 2 . 12 ) towards the bottom end ( 6 . 16 ) of front and back side ( 2 . 12 ), or that the bag ( 1 ) on the front side at least one first weakening line ( 32 ) extending from the opening end ( 4 ) to the bottom end ( 6 ) and that the back ( 12 ) at least one second weakening line ( 34 ) spaced from the opening end (FIG. 14 ) towards the bottom end ( 16 ), or that the bag ( 1 ) on the front side at least one first weakening line ( 32 ) spaced from the opening end (FIG. 4 ) towards the bottom end ( 6 ) and that the back ( 12 ) at least one second weakening line ( 34 ) extending from the opening end ( 14 ) to the bottom end ( 16 ), or that the bag ( 1 ) on the front side at least one first weakening line ( 32 ) extending from the opening end ( 4 ) towards the bottom end ( 6 ) and that the back ( 12 ) has at least one second weakening line ( 34 ) spaced from the opening end (FIG. 14 ) towards the bottom end ( 16 ), or that the bag ( 1 ) on the front side at least one first weakening line ( 32 ) extending from the bottom end ( 6 ) towards the opening end ( 4 ) and that the back ( 12 ) at least one second weakening line ( 34 ) spaced from the opening end (FIG. 14 ) towards the bottom end ( 16 ), or that the bag ( 1 ) on the front side at least one first weakening line ( 32 ) spaced from the opening end (FIG. 4 ) towards the bottom end ( 6 ) and that the back ( 12 ) at least one second weakening line ( 34 ) extending from the opening end ( 14 ) towards the bottom end ( 16 ), or that the bag ( 1 ) on the front side at least one first weakening line ( 32 ) spaced from the opening end (FIG. 4 ) towards the bottom end ( 6 ) and that the back ( 12 ) at least one second weakening line ( 34 ), which extends from the bottom end ( 16 ) towards the opening end ( 14 ). Bag ( 1 ) according to one of the preceding claims, characterized in that the respectively rectified lines of weakness ( 32 . 34 ) from front and back ( 2 . 12 ) extend at least in sections or for the most part over overlapping, opposing areas of the front and rear sides. Bag ( 1 ) according to one of the preceding claims, characterized in that the substantially rectified first and second weakening lines ( 32 . 34 ) from front and back ( 2 . 12 ) parallel to the first and / or second margin ( 8th . 10 ; 18 . 20 ) of front and back side ( 2 . 12 ). Bag ( 1 ) according to one of the preceding claims, characterized in that the longitudinal extent of the rear side ( 12 ), measured from the bottom end ( 16 ) until the opening ( 14 ), is greater than the longitudinal extent of the front side ( 2 ), measured from the bottom end ( 6 ) until the opening ( 4 ). Bag ( 1 ) according to one of the preceding claims, characterized in that the longitudinal extent of the rear side ( 12 ), measured from the bottom end ( 16 ) to the opening end ( 14 ), at least twice or at least three times as large as the longitudinal extent of the front side ( 2 ), measured from the bottom end ( 6 ) to the opening end ( 4 ). Bag ( 1 ) according to any one of the preceding claims, further comprising a bag bottom element which supports the front side ( 2 ) with the back ( 12 ), wherein the floor element has at least one ninth line of weakness, which is in operative connection with the first and / or second weakening line (FIG. 32 . 34 ) from front and back ( 2 . 12 ) stands. Bag ( 1 ) according to one of the preceding claims, further comprising first and / or second side wall elements between the first side edges ( 8th . 18 ) from front and back ( 2 . 12 ) or the second margins ( 10 . 20 ) from front and back ( 2 . 12 ). Bag ( 1 ) according to claim 12, characterized in that the side wall elements constitute gussets. Bag ( 1 ) according to claim 12 or 13, characterized in that the first and / or second weakening lines ( 32 . 34 ) of front and back side ( 2 . 12 ) extend in the region which extends in the respectively folded state from the inner fold of the first side wall element to the inner fold of the second side wall element. Bag ( 1 ) according to one of the preceding claims, characterized in that the bag is formed substantially in one piece. Bag ( 1 ) according to one of the preceding claims, characterized in that it represents a bag for receiving unbaked or pre-baked pastry, ready-baked baked goods, pizza, pizza noodles, pancakes, crepes, burgers, ravioli, sandwiches and the like. Bag ( 1 ) according to one of the preceding claims, characterized in that the first and / or second and / or ninth weakening line ( 32 . 34 ) Represent perforation seams. Bag ( 1 ) according to one of claims 3 to 17, characterized in that the respectively substantially rectified lines of weakness ( 32 . 34 ) from front and back ( 2 . 12 ) at least in sections along opposing areas of front and back ( 2 . 12 ) can be brought to each other to the plant. Bag ( 1 ) according to claim 18, characterized in that the respective in essentially rectified lines of weakness ( 32 . 34 ) from front and back ( 2 . 12 ) at least in sections along opposing areas of front and back ( 2 . 12 ) can be brought into contact with each other and lie on the same line. Bag ( 1 ) according to one of claims 4 to 19, characterized in that the respectively substantially rectified lines of weakness ( 32 . 34 ) from front and back ( 2 . 12 ) at least in sections along opposing areas of front and back ( 2 . 12 ) run parallel. Bag ( 1 ) according to one of claims 11 to 20, characterized in that the bag bottom element the bottom end of the front side ( 2 ) with the bottom end of the back ( 12 ) connects. Bag ( 1 ) according to one of claims 13 to 21, characterized in that the side wall elements represent gussets extending from the bottom end of the front and back ( 2 . 12 ). Bag ( 1 ) according to one of claims 14 to 22, characterized in that the first and / or second weakening lines ( 32 . 34 ) of front and back side ( 2 . 12 ) extend in the region which extends in the respectively folded state from the side fold of the first side change element to the side fold of the second side wall element. Method for producing a bag ( 1 ) according to one of the preceding claims, comprising the steps of: a) providing an endless web of bag material having opposite first and second side edges, b) applying at least one line of weakness (FIG. 33 c) optionally folding down at least one side edge or the first and second side margins in the direction of the central longitudinal axis of the endless web to form at least one gusset, d) separating separate segments from the endless web by means of cutting or Punching, e) unfolding first and second sections of the severed segment together to form an interfold fold extending between the opposing first and second side edges and forming front and back sides (Fig. 2 . 12 ) of the bag ( 1 ), and f) attaching the abutting first and second side edges of front and rear side ( 2 . 12 ). Method for producing a bag ( 1 ) according to any one of claims 1 to 23, comprising the steps of: a) providing an endless web of bag material having opposed first and second side edges; b) spacing apart dividing lines along the transverse orientation of the endless web at least in sections from the first side edge to the first side edge extend second side edge, c) attaching at least one weakening line ( 33 d) optionally folding at least one side edge in the direction of the central longitudinal axis of the continuous web to form at least one gusset, e) separating separate segments from the endless web along the transverse dividing lines, in particular by tensile stress, f) collapsing first and second sections of the severed segment to form an interfold fold extending between the opposing first and second side edges, and forming front and back (FIGS. 2 . 12 ) of the bag ( 1 ), and g) attaching the abutting first and second side edges of front and rear sides, respectively (FIG. 2 . 12 ). A method according to claim 25, characterized in that the method step c) precedes the method step b) or that the method steps b) and c) are carried out substantially simultaneously. Method for producing a bag ( 1 ) according to one of claims 1 to 23, comprising the steps: a. Providing an endless web of bag material, b. Attaching at least a first and at least a second, from the first spaced, weakening line ( 33 ) each along the longitudinal direction of the endless track spaced from the opposite side regions, c. spaced attachment of parting lines along the transverse orientation of the endless web extending at least in sections from the first side edge to the second side edge, d. Forming a tube from the continuous web by at least partially connecting the first and second side regions to form the front and back side (FIG. 2 . 12 ), e. optionally forming opposing first and second gussets, f. Separating separate segments from the continuous web along the transverse dividing lines, g. Forming a closed bottom area at the bottom end of front and back ( 2 . 12 ). A method according to claim 27, characterized in that the first and second weakening lines are spaced such that they are in the finished bag on the front and on the back substantially and in which the substantially rectified lines of weakness of the front and rear sides extend in particular at least in sections, in particular for the most part, over overlapping, opposing areas of the front and rear sides. Method according to claim 27 or 28, characterized in that the first and second weakening lines ( 32 . 34 ) are mounted so spaced apart from each other on the continuous web, that these in the finished bag ( 1 ) on the front and on the back ( 2 . 12 ) are arranged such that they are to bring each other to rest or lie on the same line. Method according to one of claims 24 to 29, characterized in that the weakening and / or separation lines represent perforation seams. A method according to any one of claims 24 to 26, characterized in that the turnup fold is perpendicular to the opposing first and second side edges. Method according to one of claims 27 to 29, characterized in that the separation of separate segments from the continuous web along the transverse dividing lines is effected by tensile stress. Use of the bag ( 1 ) according to any one of claims 1 to 23 for the packaging or uptake of food, in particular unbaked or baked baked goods, ready-baked baked goods, pizza, pizza corners, pancakes, crepes, burgers, fritters, sandwiches and the like.

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