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WO2000058167A1 - Reclosable packaging systems - Google Patents

Reclosable packaging systems Download PDF

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Publication number
WO2000058167A1
WO2000058167A1 PCT/IT2000/000095 IT0000095W WO0058167A1 WO 2000058167 A1 WO2000058167 A1 WO 2000058167A1 IT 0000095 W IT0000095 W IT 0000095W WO 0058167 A1 WO0058167 A1 WO 0058167A1
Authority
WO
WIPO (PCT)
Prior art keywords
strip
adhesive
band
cut
film
Prior art date
Application number
PCT/IT2000/000095
Other languages
French (fr)
Inventor
Vittorio Roncoroni
Franco Navarini
Stefano Cavallo
Original Assignee
Safta S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from IT1999MI000678 external-priority patent/IT1312041B1/en
Priority claimed from IT2000MI000316 external-priority patent/IT1316649B1/en
Application filed by Safta S.P.A. filed Critical Safta S.P.A.
Priority to AU38342/00A priority Critical patent/AU3834200A/en
Publication of WO2000058167A1 publication Critical patent/WO2000058167A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00Details of, or accessories for, sacks or bags
    • B65D33/16End- or aperture-closing arrangements or devices
    • B65D33/18End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
    • B65D33/20End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps using pressure-sensitive adhesive

Definitions

  • the present invention concerns packaging systems including a container body of commercial products generally in doses superior to the monodose, formed of at least two primary walls (front-and back-walls) and possibly of two intermediate walls inserted as gusset between said primary wall edges, with side -, top - and bottom - seals, and of a device for the easy opening and sure reclosure of the packaging for and after each dose extraction .
  • the invention concerns, besides the said pluri-dose packagings, multilayer films, foils, sheets and the like preferably in form of strips, tapes, bands and the like, associable to the said packaging walls to render them easy to open and safetly reclosable in order to take, in succession, portions of the packed content at least up to its total consumption .
  • One of the tendency lines appeared in the last recent years in the packaging field is dictated by the convenience of a progressive increase of the content of the packaging services.
  • the male element is a small solid cylinder and the female element is, to simplify, an empty half-cylinder.
  • Applicant's European Patent No. 0661164 discloses a non-mechanical system - based on a complexe multilayer foil including a press - sensitive adhesive and an incision or die-cutting, said foil-being particulaly suitable to form lids for containers such as trays provided with edges.
  • At least up to now said patented system has been seen as confined to trays and therefore not extendable to containers other than trays.
  • a strong need is still remained to have opening-and reclosure devices for repeated extractions, applicable to the major part of containers in particular to those other than trays.
  • First object of the invention are now essentially universal devices capable of being associated to the major types of commercial containers, which new devices are free from the inconveniences of the conventional containers in particular of the above mentioned mechanical drawbacks and limitations.
  • An other object of the invention is to provide systems of packages which can be opened and reclosed for "n" (i.e. unlimited) repeatable content extractions, in particular of the enveloppe, bag, pouch, bottle-types which incorporate strips or bands obtained from special foils, and realize non mechanical couplings of high reliability.
  • a further object of the invention is a method for the preparation of foils which are longitudinally cut to provide said strips.
  • FIG. 1 is a schematic partially sectioned front view of a basic pouch system according to the invention.
  • - figure la is a partially prospective front-top view of the pouch of fig. 1 from which the head portion has been taken away;
  • FIG. 2 is a partially prospective view of the pouch of fig. 1 opened according to the top tear line 7, cut along Z and seen from the side of the arrow F of fig. la;
  • FIG. 3 is a top view in cross-section according to line X-X of fig. 2;
  • FIG. 4a, 4b, 4c are three longitudinal cross-sections according to line Y-Y in the figures la and 3 of the bag in the correspondence to the band or strip 6;
  • FIG. 5 is a block scheme of a manufacturing process of a laminate from which are cut the strips or bands according to the invention.
  • FIG. 6 is a scheme of a manufacturing process of the enveloppes or bags of the invention provided with a strip, and sealed and filled with product.
  • FIG. 7a, 8a, 9a and 10a are schematic partially cross-sectioned front views of an advantageous improved embodiment of the pouch system of 1;
  • FIG. 7b, 8b, 9b and 10b are cross-sectioned views according to line w-w of said figures 7a, 8a, 9a and 10a;
  • figure 11a is a cross-sectioned front view, on an enlarged scale, of the most representative portion of figure 7a ;
  • Figure 1 shows a system of the invention consisting of a package, f.i. a pouch, bag and the like with a resealable and flexible container body C comprising:
  • a strip device 6 is attached by seal 5 ' ' to the inner faces of the primary walls 1 and 1' at the upper portion of packaging C near but under the line 7; the strip device 6 opens and closes the packaging C WITHOUT having recourse to mechanical couplings of the zipper type.
  • the closure and opening take place because of the composition of the strip 6 which replaces here the "zipper” and operates by realizing a non mechanical coupling.
  • Figure 2 shows in perspective view the package C of fig. la without however the head seal 5' torn or cut away.
  • the edges 10-10' are detached and the left side seal 5 of figures 1 and la is imagined also detached so to let see: the content 4 (here simply represented by a granular product) within bag C; the new strip device 6 to open and reclose; - sealings S ⁇ -Bo' 1 of strip 6 to the inner faces of primary walls 1-1'.
  • strip 6 is generally cut from a multilayer laminate LA comprising at least:
  • thermosealing layer or film (2a) compatible with the inner faces of primary walls 1, I 1 (shown with dashed lines in figures 3, 4a, 4b and 4c generally consisting of a polyolefin resin (homo-, co-polymers of ethylene PE and/or propylene PP, ionomeric or other thermoplastic resins) with a thickness range preferably of from 10 to 60 microns.
  • a polyolefin resin homo-, co-polymers of ethylene PE and/or propylene PP, ionomeric or other thermoplastic resins
  • thermosealing film can be alone or preferably bonded by a polyurethane adhesive layer PU or by coextrusion (2c, 2'c), to a second layer 2b consisting of a mechanically and thermally more resistant film (as bioriented polypropylene OPP, polyester PET, oriented polyamide OPA, paper, aluminium AL, polypropylene PP, polyethylene PE etc) showing a thickness range of from 5 to 60, preferably 12 to 40 microns and acting also as support or carrier of a presso-sensitive adhesive layer 3.
  • a mechanically and thermally more resistant film as bioriented polypropylene OPP, polyester PET, oriented polyamide OPA, paper, aluminium AL, polypropylene PP, polyethylene PE etc
  • Said intermediate layer 3 consisting of a pressure-sensitive or repositionable adhesive preferably of acrylic nature and in amounts from 5g to 25 g/m 2 , so formulated that its bonding capability remains unchanged even after repeated detachements from layer 2 and/or layer 2'.
  • thermosealing layer or film 2 'a also compatible with the inner faces of the package primary walls 1-1' having a composition which is substantially similar or equal to that of layer 2a even if it can differ therefrom in the structure or thicknesses of said layer, and preferably an optional carrier layer 2'b similar to film 2b or different in structure, thickness, treatment level etc .
  • the coupled-film 2 is preferably obtained by coupling (or coextruding) film 2a with film 2b; it can possibly be formed of only one film 2a.
  • Film 2' is preferably obtained by coupling (or coextruding) film 2'a with 2'b; it can be formed of only one film 2'a.
  • the sign + indicates a coupling through polyurethane adhesives PU or coextrusion COES.
  • the films or layers 2 and 2' are bonded (coupling ++) by repositionable (pressure - sensitive) adhesive 3 to form laminate LA.
  • Said adhesive 3 can be applied indifferently on film 2 or film 2' at full coverage (i.e. on the whole film surface) or according to longitudinal stripes so to show zones (with a widt or height of from 7 to 50 mm) covered by the adhesive and zones (width from 5 to 30 mm) without adhesive.
  • This last method allows the obtainement (after cutting the laminate LA) of strips or bands 6 only partially covered by adhesive which may simplify the package preparation and make easier the opening and reclosing operations of the package.
  • the laminate LA is cut in stripes width a with of from 7 to 40 preferably 10 to 25 mm, so to obtain reels of said stripes ready to be utilized on the packaging machines provided with the "ad hoc" device to insert the bands (of the type above described or of the type known as "zipper") during the final package formation.
  • the container body forming film i.e. primary walls 1-1' (which are outside the invention scope) can be mono-or multilayer, (two or more layers) formed of the materials currently utilized on the horizontal, vertical or other packaging machines with or without on-line filling, to manufacture envelopes, bags, pouches sachets etc.
  • the insertion of strips 6 having the composition and structure described in the above paragraphs I, II, III, IV and V. They are positioned in the predetermined zone and with precision in the point in which the welding bars 8-8' of adeguate form and size, (f.i.
  • the sealing upper line Is (and/or lower line li) be possibly coincident with the edges N-N' of the band 6 (fig. 4a) but preferably be under or above said edges and with a distance therefrom which depends on the used band type in relation both to its dimensions and its constitution (full coverage adhesive, or longitunal register adhesive with or without die-cutting etc).
  • fig. 4a is shown the case in which the pressure-sensitive adhesive 3 is applied at full coverage, i.e. the edges are coincident with the upper and lower lines N, N ' of strip 6.
  • said pressure-sensitive adhesive 3 is applied at register with a band edge i.e. D' is coincident with the strip lower line N 1 but D is under N.
  • the adhesive 3 is at register at both the strip edges.
  • the band or strip 6 has an adhesive coating only on the zone 3 while the remaining portion (6 minus 3) has a zone P without adhesive.
  • the coated zone 3 extends from the extreme lower edge N' of the band 6 up to a height preferably of from 5 to 15 mm therefrom whereby N' is always coincident with the lower edge D' of the adhesive zone the upper edge D of which will always have a distance preferably of 15-5 mm from the band upper edge N.
  • the upper sealing bar 8' will carry out an additional weld 5' (fig. 1) extending substantially the center of the notch 9 of the package C.
  • figures 7a, 7b show the initial situation with the package head closed by seals 5 '-5
  • figures 8a and 8b represent the package with when the top portion has ibeen taken away
  • figures 9a abd 9b represent the top portions of the uncoated zone P opened wide apart
  • figures 10a and 10b the coated zones 2, 2' of 6 detached up to allow the extraction of a dose of the packed product (4 in fig. 2).
  • Figures 11a and lib show more in details the positions of the strip 6 (with the coated part 3 and the uncoated P) , the sealed zone 5' and 5" (by the sealing bars 8, 8' and one notch 9 inside the seal 5).
  • the unwinding system of the band during its application in the packing phase can be considered conventional however can vary the mode of the insertion of the band which according to the packaging machine type can be pinched within the sealings 5 and 5o (fig. 1) as in the majority of cases, or can be pre-cut and inserted in the center of the container face, so to not interfere with the side seals.
  • the package C completed with the other seals and filled with the product to be packed or still empty to be sent to the filling phase, is considered finished and ready for its utilization.
  • Fig. 6 shows the form, sealing and filling system FSF: from reel Bl is unwinded the container body forming film 1 by the unwinding rollers SV and from reel B2 is unwinded the continuos strip 6 which is inserted in the twice folded film, undergoes the sealing 5'' by sealing bars 8, thereafter the sealing 5' (acting also as tamper-evident of tamper proof), by sealing bars

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)

Abstract

The system for the packaging of product pluri-doses in a container body (C) consisting of at least a front wall (1) and a rear wall (1'), includes, as a device for repeated openings and closures, a strip (6) comprising at least: an upper film (2a) thermosealable to the inner face of one (1) of said walls; an intermediate layer (3) of pressure-sensitive adhesive; and a lower film (2'a) thermosealable to the inner face of the other wall (1'), this last film being possibly die-cut.

Description

Title: RECLOSABLE PACKAGING SYSTEMS
The present invention concerns packaging systems including a container body of commercial products generally in doses superior to the monodose, formed of at least two primary walls (front-and back-walls) and possibly of two intermediate walls inserted as gusset between said primary wall edges, with side -, top - and bottom - seals, and of a device for the easy opening and sure reclosure of the packaging for and after each dose extraction . More particularly the invention concerns, besides the said pluri-dose packagings, multilayer films, foils, sheets and the like preferably in form of strips, tapes, bands and the like, associable to the said packaging walls to render them easy to open and safetly reclosable in order to take, in succession, portions of the packed content at least up to its total consumption . One of the tendency lines appeared in the last recent years in the packaging field is dictated by the convenience of a progressive increase of the content of the packaging services.
Indeed the small packages even if not mono-dose (for instance up to 100-150 ml) can show difficulties: - in their opening because of the toughness which the laminates must have to be liquid-proof, of the loss of adhesion and of the tearing capability caused by the content aggression on the adhesives; - in the reclosure which loses the seal with the increase of the content extractions; - in the commercialisation because of the high ratio of the package surface to the content volume, which can cause criticisms by the environmentalists and cost disproportions.
Several solutions have been proposed and several devices are utilized to-day for the repeating of ouvertures and reclosures. Among them it is to be mentioned in the first instance, the so-called "zipper" system obtained by creating on said primary walls internal faces a male element and a female element which are (often not without difficulties) superposed and mechanically closed through their mutual penetration brought about by exerting on them a given finger pressure, and are opened by exterting a detaching force on the head edges of the packages.
Generally the male element is a small solid cylinder and the female element is, to simplify, an empty half-cylinder.
As both elements are made of high elastic memory thermoplastic material, the coupling by mutual penetration and uncoupling by detachement of the elements are purely mechanical operations. Even if it has had and still has lots of merits, the "zipper" system shows several inconveniences deriving from the necessity of forming and applying (on the wall internal faces) two different elements which because of theyr mechanical coupling and uncoupling under forces each time unequal, loose inevitably the initial properties and reliability.
Applicant's European Patent No. 0661164 discloses a non-mechanical system - based on a complexe multilayer foil including a press - sensitive adhesive and an incision or die-cutting, said foil-being particulaly suitable to form lids for containers such as trays provided with edges. At least up to now said patented system has been seen as confined to trays and therefore not extendable to containers other than trays. A strong need is still remained to have opening-and reclosure devices for repeated extractions, applicable to the major part of containers in particular to those other than trays. First object of the invention are now essentially universal devices capable of being associated to the major types of commercial containers, which new devices are free from the inconveniences of the conventional containers in particular of the above mentioned mechanical drawbacks and limitations. An other object of the invention is to provide systems of packages which can be opened and reclosed for "n" (i.e. unlimited) repeatable content extractions, in particular of the enveloppe, bag, pouch, bottle-types which incorporate strips or bands obtained from special foils, and realize non mechanical couplings of high reliability.
A further object of the invention is a method for the preparation of foils which are longitudinally cut to provide said strips. The main features of the invention are recited in the appended claims which are considered herewith incorporated. The various aspects and advantages of the invention will better appear from the following description of the non-limitative embodiments shown in the accompanying drawings in which:
- figures 1, is a schematic partially sectioned front view of a basic pouch system according to the invention;
- figure la is a partially prospective front-top view of the pouch of fig. 1 from which the head portion has been taken away;
- figure 2 is a partially prospective view of the pouch of fig. 1 opened according to the top tear line 7, cut along Z and seen from the side of the arrow F of fig. la;
- figure 3 is a top view in cross-section according to line X-X of fig. 2;
- figures 4a, 4b, 4c are three longitudinal cross-sections according to line Y-Y in the figures la and 3 of the bag in the correspondence to the band or strip 6;
- figure 5 is a block scheme of a manufacturing process of a laminate from which are cut the strips or bands according to the invention; and
- figure 6 is a scheme of a manufacturing process of the enveloppes or bags of the invention provided with a strip, and sealed and filled with product.
- figures 7a, 8a, 9a and 10a are schematic partially cross-sectioned front views of an advantageous improved embodiment of the pouch system of 1;
- figures 7b, 8b, 9b and 10b are cross-sectioned views according to line w-w of said figures 7a, 8a, 9a and 10a; and
- figure 11a is a cross-sectioned front view, on an enlarged scale, of the most representative portion of figure 7a ; and
- figure lib is the cross-section w-w of said figure 11a. Figure 1 shows a system of the invention consisting of a package, f.i. a pouch, bag and the like with a resealable and flexible container body C comprising:
- two side seals 5-5o of the first primary anterior, (front) wall 1 and of the second primary posterior (rear) wall 1' (fig. 2) ; - a bottoπ seal 5'1' and preferably a head seal 5', and: - a notch 9 to detatch along the (dashed) tear or cut line 7 the bag top portion above 7.
According to a first feature of the invention, a strip device 6 is attached by seal 5 ' ' to the inner faces of the primary walls 1 and 1' at the upper portion of packaging C near but under the line 7; the strip device 6 opens and closes the packaging C WITHOUT having recourse to mechanical couplings of the zipper type.
In fig. la is shown the package C after tearing (or cutting) said top portion above line 7, so to expose and make accessible the edges 10 of the packaging portion just below said detachement line 7. By seizing and pulling edges 10 in the detach direction it becomes possible to act on the strip 6 to cause its opening.
According to a feature of the invention, the closure and opening take place because of the composition of the strip 6 which replaces here the "zipper" and operates by realizing a non mechanical coupling.
Figure 2 shows in perspective view the package C of fig. la without however the head seal 5' torn or cut away. The edges 10-10' are detached and the left side seal 5 of figures 1 and la is imagined also detached so to let see: the content 4 (here simply represented by a granular product) within bag C; the new strip device 6 to open and reclose; - sealings S^-Bo'1 of strip 6 to the inner faces of primary walls 1-1'.
The typical composition of strip 6 can be appreciated from figures 2, 3, 4a, 4b and 4c. Said strip is generally cut from a multilayer laminate LA comprising at least:
I) a thermosealing layer or film (2a) compatible with the inner faces of primary walls 1, I1 (shown with dashed lines in figures 3, 4a, 4b and 4c generally consisting of a polyolefin resin (homo-, co-polymers of ethylene PE and/or propylene PP, ionomeric or other thermoplastic resins) with a thickness range preferably of from 10 to 60 microns.
Said thermosealing film can be alone or preferably bonded by a polyurethane adhesive layer PU or by coextrusion (2c, 2'c), to a second layer 2b consisting of a mechanically and thermally more resistant film (as bioriented polypropylene OPP, polyester PET, oriented polyamide OPA, paper, aluminium AL, polypropylene PP, polyethylene PE etc) showing a thickness range of from 5 to 60, preferably 12 to 40 microns and acting also as support or carrier of a presso-sensitive adhesive layer 3.
II) Said intermediate layer 3 consisting of a pressure-sensitive or repositionable adhesive preferably of acrylic nature and in amounts from 5g to 25 g/m2, so formulated that its bonding capability remains unchanged even after repeated detachements from layer 2 and/or layer 2'.
III) A thermosealing layer or film 2 'a also compatible with the inner faces of the package primary walls 1-1' having a composition which is substantially similar or equal to that of layer 2a even if it can differ therefrom in the structure or thicknesses of said layer, and preferably an optional carrier layer 2'b similar to film 2b or different in structure, thickness, treatment level etc .
An advantageous process to manufacture laminate LA and to cut it in strips is shown in fig. 5, which is important to obtain an optimally working bag and is articulated in steps carried out preferably in the following succession.
IV) The coupled-film 2 is preferably obtained by coupling (or coextruding) film 2a with film 2b; it can possibly be formed of only one film 2a.
V) Film 2' is preferably obtained by coupling (or coextruding) film 2'a with 2'b; it can be formed of only one film 2'a. In fig. 5 the sign + indicates a coupling through polyurethane adhesives PU or coextrusion COES.
VI) The films or layers 2 and 2' are bonded (coupling ++) by repositionable (pressure - sensitive) adhesive 3 to form laminate LA. Said adhesive 3 can be applied indifferently on film 2 or film 2' at full coverage (i.e. on the whole film surface) or according to longitudinal stripes so to show zones (with a widt or height of from 7 to 50 mm) covered by the adhesive and zones (width from 5 to 30 mm) without adhesive.
This last method allows the obtainement (after cutting the laminate LA) of strips or bands 6 only partially covered by adhesive which may simplify the package preparation and make easier the opening and reclosing operations of the package.
VII) The laminate LA is cut in stripes width a with of from 7 to 40 preferably 10 to 25 mm, so to obtain reels of said stripes ready to be utilized on the packaging machines provided with the "ad hoc" device to insert the bands (of the type above described or of the type known as "zipper") during the final package formation.
VIII) The container body forming film i.e. primary walls 1-1' (which are outside the invention scope) can be mono-or multilayer, (two or more layers) formed of the materials currently utilized on the horizontal, vertical or other packaging machines with or without on-line filling, to manufacture envelopes, bags, pouches sachets etc. During the formation of the packaging takes place the insertion of strips 6 having the composition and structure described in the above paragraphs I, II, III, IV and V. They are positioned in the predetermined zone and with precision in the point in which the welding bars 8-8' of adeguate form and size, (f.i. between the ends 20 and 21) , delimitate the sealed surface perimeter in such a way that the sealing upper line Is (and/or lower line li) be possibly coincident with the edges N-N' of the band 6 (fig. 4a) but preferably be under or above said edges and with a distance therefrom which depends on the used band type in relation both to its dimensions and its constitution (full coverage adhesive, or longitunal register adhesive with or without die-cutting etc). In particular, in fig. 4a is shown the case in which the pressure-sensitive adhesive 3 is applied at full coverage, i.e. the edges are coincident with the upper and lower lines N, N ' of strip 6. In fig. 4b said pressure-sensitive adhesive 3 is applied at register with a band edge i.e. D' is coincident with the strip lower line N1 but D is under N. In fig. 4c the adhesive 3 is at register at both the strip edges.
In the advantageous embodiments (related to figure 4b) shown in the front views of figures 7a, 8a, 9a and 10a and in the relevant cross-sections f.i. along an emblematic line W-W of front views (figures 7b, 8b, 9b and 10b), the band or strip 6 has an adhesive coating only on the zone 3 while the remaining portion (6 minus 3) has a zone P without adhesive. It has been found that by critically coordinating the band total width 6 (of preferably from 10 to 30 mm) , the lower coated zone height or width 3 (of preferably from 5 to 15 mm), the upper uncoated zone P (of preferably from 5 to 20 mm), the position of the sealing 5" (figure 11a) of the strip 6 to the container inner faces, and the location of the notch 9, a synergic effect is obtained in the sense that now the band 6 can be advantageously utilized as a guide of the very first tear or cut, and as a seizing grip to facilitate the detachment of zone 3 bonded and sealed by the press-sensitive adhesive (so avoiding the preferential cut line 7).
Typically (figure lib) the coated zone 3 extends from the extreme lower edge N' of the band 6 up to a height preferably of from 5 to 15 mm therefrom whereby N' is always coincident with the lower edge D' of the adhesive zone the upper edge D of which will always have a distance preferably of 15-5 mm from the band upper edge N.
Characteristically the upper sealing bar 8' will carry out an additional weld 5' (fig. 1) extending substantially the center of the notch 9 of the package C.
In fig. 8a it is indicated the upper part of the strip 6, as the guide line 7' of the first tear or cut while in fig. 8b can be seen the detachement position P. Obviously the first tear or cut operation eliminates the top portion 5 '+10 of the package and creates the access to the seizings P which are pulled away one from the other causing the detachement of the adhesive portions from 2 or 2'.
Accordingly figures 7a, 7b, show the initial situation with the package head closed by seals 5 '-5", figures 8a and 8b represent the package with when the top portion has ibeen taken away; figures 9a abd 9b represent the top portions of the uncoated zone P opened wide apart and figures 10a and 10b the coated zones 2, 2' of 6 detached up to allow the extraction of a dose of the packed product (4 in fig. 2).
Figures 11a and lib show more in details the positions of the strip 6 (with the coated part 3 and the uncoated P) , the sealed zone 5' and 5" (by the sealing bars 8, 8' and one notch 9 inside the seal 5).
The unwinding system of the band during its application in the packing phase can be considered conventional however can vary the mode of the insertion of the band which according to the packaging machine type can be pinched within the sealings 5 and 5o (fig. 1) as in the majority of cases, or can be pre-cut and inserted in the center of the container face, so to not interfere with the side seals.
The package C, completed with the other seals and filled with the product to be packed or still empty to be sent to the filling phase, is considered finished and ready for its utilization.
Fig. 6 shows the form, sealing and filling system FSF: from reel Bl is unwinded the container body forming film 1 by the unwinding rollers SV and from reel B2 is unwinded the continuos strip 6 which is inserted in the twice folded film, undergoes the sealing 5'' by sealing bars 8, thereafter the sealing 5' (acting also as tamper-evident of tamper proof), by sealing bars
8", the filling of product 4 from its opened bottom and then the sealing of said bottom, the finished and filled package C goes out of the forming chain or belt and is sent to the collection store house.
It is to be emphasized that as above anticipated and shown in the figures 1, 7a, 7b, 11a and lib an additional sealing 5' above notch 9 (N) enhances the safety action as tamper-evident or tamper-proof.
For scruple of illustrative clarity the invention has been described with reference to the (exemplifying and not limitative) embodiments which are shown in the accompanying drawings which are to be considered susceptible of all the changes, modifications, substitutions and the like obvious to the mean skilled persons and therefore comprised or falling in the scope of the claims hereunder.

Claims

1) System for the packaging of commercial products in doses superior to the monodose, comprising: - a container body (C) consisting of two primary front- and rear-walls (1, 1'), and possibly intermediate walls preferably gussetted between said primary anterior and posterior walls which are sealed on two sides, on the bottom and preferably on the head; and a device allowing repeated openings and closures for several partial content extractions, characterized by a strip, band or tape preferably obtained from cut films or sheets, and comprising at least: - a superior ( ono-or multi-layer) film (2a) thermosealable to the inner face of a first primary wall (1) ; - an intermediate layer (3) of pressure-sensitive, repositionable adhesive applied at full coverage or at longitudinal register in respect of the strip width; - and an inferior mono-or plurilayer film (2'a) therlosealable to the inner face of the second primary wall (1'), this last film being possibly die-cut.
2) System according to claim 1, characterized in that a support film (2b, 2'b) is associated to each face of the pressure-sensitive adhesive layer (3).
3) System according to claim 2, characterized in that to each of said support films (2b, 2'b) is associated a polyurethanic adhesive layer (2c, 2'c) to bond said adhesive-support films (3) to the inner faces of said primary walls and possibly intermediate walls.
4) System according to claim 3, characterized in that the pressure-sensitive repositionable adhesive (3) is applied on the whole surface of the support sheet before cutting this last sheet in strips or bands. 5) System according to claim 3, in which said adhesive (3) is applied at longitudinal register on the support sheet before the cut in strips of this sheet, in such a way that said strips or bands show, after their cut, the adhesive coated on only one determined portion of their width.
6) System according to at least one of the above claims, characterized in that the dimensional structure of the band or strip, the partial adhesive coating thereupon and the positioning of said coating in respect to the strip coating extreme edges are so coordinated to allow the use of said partially coated strip as guide of the initial tear or cut and as sezing grip to detach the mutually bonded portions of the strip coated zones.
7) System according to claim 6, characterized in that the adhesive coating on the strip extends from the lower edge of the strip up to a distance from the upper edge of same strip whereby the upper uncoated mutually not-bonded portions of the band form a sufficienty wide, free zone to be seized with the fingers and opened.
8) System according to claim 7, characterized in that the strip total width or height is in the range of from 10 to 30 mm, the height of its adhesive covered lower zone ranges from 5 to 15 mm, and the height of the upper uncoated zone ranges from 5 to 20 mm.
9) System according to claim 8, characterized in that the band is sealed to the inner face of the container body forming film on a zone always less extended than the band size and at a distance, from the strip edges, ranging from 1 to 5 mm.
10) System according to at least one of the above claims, characterized by an additional sealing of the container body forming films located above the top edge of the band and above a notch in the side sealings of the films, whereby said band, besides acting as guide of the initial tear or cut and as seizing grip for the detachement of the strip bonded adhesive coated zones, acts additionally as tamper-evident.
AMENDED CLAIMS
[received by the International Bureau on 19 September 2000 (19.09.00); original claims 1-10 replaced by new claims 1-10 (3 pages)]
1) System for the packaging of commercial products in doses superior to the monodose, comprising: - a container body (C) consisting of two primary front- and rear-walls (1, 1'), and possibly intermediate walls preferably gussetted between said primary anterior and posterior walls which are sealed on two sides, on the bottom and preferably on the head; and a device allowing repeated openings and closures for several partial content extractions, by means of a strip, band or tape preferably obtained from cut films or sheets, and comprising at least: - a superior (mono-or multi-layer) film (2a) thermosealable to the inner face of a first primary wall (1); - an intermediate layer (3) of pressure-sensitive, repositionable adhesive applied at full coverage or at longitudinal register in respect of the strip width; - and an inferior mono-or plurilayer film (2'a) thermosealable to the inner face of the second primary wall (1'), wherein a support film or layer (2b, 2'b) is associated to each inner face of said pressure-sensitive adhesive layer (3), said inner faces of said support film/layer (2b, 2'b) being not thermosealable the one (2b) to the other (2'b) in the conditions of the welding of the outer layers (2a, 2'a) to the inner faces of the packaging inner walls.
2) System according to claim 1, wherein said mutually unsealable support films/layers (2b, 2'b) are selected from the group of mechanically and thermally resistant films/layers consisting of bioriented or cast polypropylene, polyester, polyamide, paper, aluminum foil and polyethylene.
3) System according to claim 2, wherein the outer faces of said mutually unsealable support films/layers (2b, 2'b) are bonded to the inner faces of the thermosealable films/layers (2a, 2'a) by coextrusion or with the aid a polyurethanic adhesive layer (2c, 2'c).
4) System according to claim 1, wherein the pressure-sensitive repositionable adhesive (3) is applied on the whole surface of the support film/layer (2b, 2'b) before cutting this last sheet in stripa or bands.
5) System according to claim 1, in which said adhesive (3) is applied at longitudinal register on the support film/layer (2b, 2'b) before the cut in strips of this sheet, in such a way that said strips or bands shaw, after their cut, the adhesive coated on only one determined portion of their width .
6) System according to at least one of the above claims, wherein the dimensional structure of the band or strip, the partial adhesive coating thereupon and the positioning of said coating in respect to the strip coating extreme edges are so coordinated to allow the use of said partially coated strip as guide of the initial tear or cut and as seizing grip to detach the mutually bonded portions of the strip coated zones, also thanks to the unsealability of the internal faces of the suport layers (2b, 2'b).
7) System according to claim 6, wherein the adhesive coating on the strip extends from the lower edge of the strip up to a distance from the upper edge of same strip whereby the upper uncoated mutually unsealed portions of the band form a sufficienty wide, free zone to be seized with the fingers and opened.
8) System according to claim 7, wherein the strip total width or height is in the range of from 10 to 30 mm, the height of its adhesive covered lower zone ranges from 5 to 15 mm, and the height of the upper uncoated unsealable zone ranges from 5 to 20 mm.
9) System according to claim 8, wherein the band is sealed to the inner face of the container body forming film on a zone always less extended than the band size and at a distance, from the strip edges, ranging from 1 to 5mm.
10) System according to at least one the above claims, characterized by an additional sealing of the container body forming films located above the top edge of the band and above a notch in the side sealings of the films, whereby said band, besides acting as guide of the initial tear or cut and as seizing grip for the detachement of the strip bonded adhesive coated zones, acts additionally as tamper-evident.
PCT/IT2000/000095 1999-03-31 2000-03-21 Reclosable packaging systems WO2000058167A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU38342/00A AU3834200A (en) 1999-03-31 2000-03-21 Reclosable packaging systems

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT1999MI000678 IT1312041B1 (en) 1999-03-31 1999-03-31 Reclosable packaging system for commercial products has strip or tape with superior film thermosealable to inner face of primary walls, and intermediate layer of pressure-sensitive repositionable adhesive
ITMI99A000678 1999-03-31
ITMI2000A000316 2000-02-22
IT2000MI000316 IT1316649B1 (en) 2000-02-22 2000-02-22 Reclosable packaging system for commercial products has strip or tape with superior film thermosealable to inner face of primary walls, and intermediate layer of pressure-sensitive repositionable adhesive

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WO2000058167A1 true WO2000058167A1 (en) 2000-10-05

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WO (1) WO2000058167A1 (en)

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FR2841542A1 (en) * 2002-07-01 2004-01-02 Marin Antonio Ochoa Isothermal sachet for keeping food products cool has opening with adhesive zone covered by protective strip prior to use
WO2004101387A1 (en) * 2003-05-15 2004-11-25 Amcor Flexibles Europe A/S Easy opening, reclosable flow-pack wrapper
EP1524197A1 (en) * 2003-10-17 2005-04-20 Nordenia Deutschland Gronau GmbH Reclosable bag
DE10325175B4 (en) * 2003-01-24 2005-09-01 Nordenia Deutschland Gronau Gmbh Closure system for flexible packaging
EP1714894A1 (en) * 2005-04-20 2006-10-25 Wipak Walsrode GmbH & Co. KG Sealing strip, associated foil packaging and methods for their manufacture
FR2885353A1 (en) * 2005-05-04 2006-11-10 Decomatic Sa Sa Plastic sealed cover for e.g. silver product or pharmaceutical
FR2890941A1 (en) * 2005-09-21 2007-03-23 Mc 3 Soc Responsabilite Limite METHOD FOR FIXING OR REFIXING AN ADHESIVE LABEL ON A PACKAGING STOCKED AT A NEGATIVE TEMPERATURE AND ADHESIVE LABEL FIXED BY SUCH A METHOD
EP1783059A1 (en) * 2005-11-07 2007-05-09 Kraft Foods Holdings, Inc. Flexible package with internal, resealable closure feature
EP1683736A3 (en) * 2005-01-20 2008-01-02 Focke & Co. (GmbH & Co. KG) Packaging pouch, and method and apparatus for making the same.
EP2243707A3 (en) * 2009-04-24 2012-09-19 Kraft Foods Global Brands LLC Apparatus and method of producing flexible packages having an automatic closure feature
EP2532605A1 (en) * 2011-06-07 2012-12-12 Mondi AG Over-pressurized packaging and a method of manufacturing such a packaging
US8596867B2 (en) 2006-12-29 2013-12-03 Kraft Foods R&D, Inc. Reclosable package
US9096780B2 (en) 2010-02-26 2015-08-04 Intercontinental Great Brands Llc Reclosable fasteners, packages having reclosable fasteners, and methods for creating reclosable fasteners
US9382461B2 (en) 2010-02-26 2016-07-05 Intercontinental Great Brands Llc Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages
US9532584B2 (en) 2007-06-29 2017-01-03 Kraft Foods Group Brands Llc Processed cheese without emulsifying salts
JP7670820B2 (en) 2021-04-13 2025-04-30 ザ プロクター アンド ギャンブル カンパニー Resealable paper-based packaging

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FR2841542A1 (en) * 2002-07-01 2004-01-02 Marin Antonio Ochoa Isothermal sachet for keeping food products cool has opening with adhesive zone covered by protective strip prior to use
DE10325175B4 (en) * 2003-01-24 2005-09-01 Nordenia Deutschland Gronau Gmbh Closure system for flexible packaging
WO2004101387A1 (en) * 2003-05-15 2004-11-25 Amcor Flexibles Europe A/S Easy opening, reclosable flow-pack wrapper
EP1524197A1 (en) * 2003-10-17 2005-04-20 Nordenia Deutschland Gronau GmbH Reclosable bag
EP1683736A3 (en) * 2005-01-20 2008-01-02 Focke & Co. (GmbH & Co. KG) Packaging pouch, and method and apparatus for making the same.
EP1714894A1 (en) * 2005-04-20 2006-10-25 Wipak Walsrode GmbH & Co. KG Sealing strip, associated foil packaging and methods for their manufacture
FR2885353A1 (en) * 2005-05-04 2006-11-10 Decomatic Sa Sa Plastic sealed cover for e.g. silver product or pharmaceutical
FR2890941A1 (en) * 2005-09-21 2007-03-23 Mc 3 Soc Responsabilite Limite METHOD FOR FIXING OR REFIXING AN ADHESIVE LABEL ON A PACKAGING STOCKED AT A NEGATIVE TEMPERATURE AND ADHESIVE LABEL FIXED BY SUCH A METHOD
EP2330046A3 (en) * 2005-11-07 2012-11-21 Kraft Foods Global Brands LLC Flexible package with internal, resealable closure feature
EP1783059A1 (en) * 2005-11-07 2007-05-09 Kraft Foods Holdings, Inc. Flexible package with internal, resealable closure feature
US8398306B2 (en) 2005-11-07 2013-03-19 Kraft Foods Global Brands Llc Flexible package with internal, resealable closure feature
US8596867B2 (en) 2006-12-29 2013-12-03 Kraft Foods R&D, Inc. Reclosable package
US9096351B2 (en) 2006-12-29 2015-08-04 Kraft Foods R & D, Inc. Reclosable package
US9878827B2 (en) 2006-12-29 2018-01-30 Kraft Foods R&D, Inc. Reclosable package
US9532584B2 (en) 2007-06-29 2017-01-03 Kraft Foods Group Brands Llc Processed cheese without emulsifying salts
EP2243707A3 (en) * 2009-04-24 2012-09-19 Kraft Foods Global Brands LLC Apparatus and method of producing flexible packages having an automatic closure feature
US9096780B2 (en) 2010-02-26 2015-08-04 Intercontinental Great Brands Llc Reclosable fasteners, packages having reclosable fasteners, and methods for creating reclosable fasteners
US9382461B2 (en) 2010-02-26 2016-07-05 Intercontinental Great Brands Llc Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages
US10287077B2 (en) 2010-02-26 2019-05-14 Intercontinental Great Brands Llc Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages
EP2532605A1 (en) * 2011-06-07 2012-12-12 Mondi AG Over-pressurized packaging and a method of manufacturing such a packaging
JP7670820B2 (en) 2021-04-13 2025-04-30 ザ プロクター アンド ギャンブル カンパニー Resealable paper-based packaging

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