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WO1990011943A1 - Enveloppes - Google Patents

Enveloppes Download PDF

Info

Publication number
WO1990011943A1
WO1990011943A1 PCT/GB1990/000536 GB9000536W WO9011943A1 WO 1990011943 A1 WO1990011943 A1 WO 1990011943A1 GB 9000536 W GB9000536 W GB 9000536W WO 9011943 A1 WO9011943 A1 WO 9011943A1
Authority
WO
WIPO (PCT)
Prior art keywords
envelope
adhesive
area
release
sealing
Prior art date
Application number
PCT/GB1990/000536
Other languages
English (en)
Inventor
Leslie Phillip Martin
Original Assignee
Swift Adhesives Limited
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
Application filed by Swift Adhesives Limited filed Critical Swift Adhesives Limited
Publication of WO1990011943A1 publication Critical patent/WO1990011943A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS 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
    • B65D27/00—Envelopes or like essentially-rectangular flexible containers for postal or other purposes having no structural provision for thickness of contents
    • B65D27/12—Closures
    • B65D27/14—Closures using adhesive applied to integral parts, e.g. flaps
    • B65D27/16—Closures using adhesive applied to integral parts, e.g. flaps using pressure-sensitive adhesive

Definitions

  • This invention relates to self-sealing envelopes and in particular to self-sealing envelopes employing a pressure sensitive adhesive which enables the envelopes to be sealed by the application of gentle pressure.
  • Most conventional self-sealing envelopes are provided with two strips of a latex-based adhesive, one on the flap of the envelope and the other on a facing portion of the body of the envelope. When brought together, the latex strips adhere to each other to seal the envelope.
  • the latex strips are not particularly tacky and do not cause a problem of adhesion to other surfaces such as the rollers of typewriters.
  • Another type of known self-sealing envelope employs a pressure sensitive adhesive.
  • a pressure sensitive adhesive will adhere to the majority of surfaces when pressed against them and so in such envelopes the adhesive must be protected by an release tape (for example a silicone-coated tape) which has to be peeled off just before the envelope is sealed.
  • an release tape for example a silicone-coated tape
  • the tacky pressure sensitive adhesive can adhere to other objects, for example the proposed contents for the envelope or components of a typewriter.
  • it is clear that re-use of such envelopes is inconvenient once the released tape has been discarded.
  • an envelope the surface whereof comprises a first area coated with a pressure sensitive adhesive, a second area provided with a release surface and positionable in facing relationship with said first area permitting said envelope to be loaded, and a third area positionable in facing relationship with said first area on disengagement of said first and second areas whereby to seal said envelope.
  • one or more of the first, second and third surface areas of the envelope are located on flap or flange portions of the envelope so that the adhesive and release areas may be disengaged and the third.or sealing surface area may be brought into contact with the adhesive area simply by folding or unfolding envelope flap portions.
  • the release area and the sealing area are located on first and second flap portions of the envelope and the adhesive area is located on the outer surface of the body of the envelope, the adhesive area being positioned to be contactable by the release or sealing areas on folding the first or second flap portions respectively.
  • the adhesive and sealing areas are located on first and second flap portions of the envelope and the release area is located on the outer surface of the body of the envelope, the adhesive area being positioned to be contactable by the release or sealing areas on folding of the first flap portion or on unfolding of the first flap portion and f lding of the second flap portion respectively.
  • the sealing area is located on the outer surface of the body of the envelope and the adhesive and release areas are located on the same face of a flap portion of the envelope, said flap portion being foldable to bring the adhesive and release areas into contact.
  • envelopes of the present invention do clearly overcome the disadvantages mentioned above for self-sealing envelopes employing latex-based adhesives. It will also be apparent that the envelopes of the present invention do not require a separate release tape since during pre-use storage the adhesive layer is protected by the release area of the envelope surface and, immediately prior to use, the adhesive can be exposed simply by disengaging the adhesive and release areas, for example by unfolding a flap portion of the envelope.
  • the flap portions of the envelopes of the invention may be provided with fold-lines or creases or with scores or other lines of weakness in order to facilitate folding.
  • any convenient pressure sensitive adhesive may be used.
  • Hot melt pressure sensitive adhesive for example B946/91 available from Swift Adhesives Limited
  • water-based adhesives such as for example C945/52 available from Swift Adhesives Limited
  • solvent-based adhesives may alternatively be used.
  • Many such pressure sensitive adhesives have much higher tack levels than the latex-based adhesives of the conventional self-sealing envelopes so that the quantity of adhesive required may be relatively small.
  • the adhesive can be applied to the envelope or the web from which the envelope is later formed as a continuous strip or in a discontinuous fashion, for example as a plurality of patches, strips or dots.
  • the release surface on the envelopes of the invention is generally a surface to which the adhesive adheres less firmly than it does to the basic material of the envelope. It will generally be applied as a coating layer and can be of any substance to which the particular adhesive chosen will adhere but from which the adhesive may be disengaged with reasonable ease. Conveniently, the bond between the adhesive and release layers will only just be sufficient to maintain the two in contact under normal handling.
  • the release layer will be formed from a silicone, such as for example a solventless silicone (e.g. Syl-Off Q2-7203), a solvent-based silicone (for example Syl-Off 7046) or an emulsion-based silicone (for example Syl-Off Q2-7198/Q2-7199) .
  • the Syl-Off silicones are available from Dow-Corning.
  • the application of silicones which are curable by ultra-violet radiation is particularly preferred as the silicone can then be printed onto a continuous web which may then be passed under UV-radiation curing lamps thereby speeding up production.
  • the area covered by the release layer should be sufficient to mask the entire area coated by adhesive and preferably the surface area of the release layer will be greater than that of the adhesive layer so as to allow for some error in positioning.
  • the envelope may be made re-usable by providing the sealing area with an adhesion- reducing layer, for example a plastic film.
  • the envelope can then be sealed by adhering the adhesive to this adhesion -reducing layer rather than directly to the basic material of the envelope itself.
  • the envelope can be opened by peeling adhesive and sealing layers apart without damaging either the envelope or the adhesive layer.
  • the envelope can then be re-used immediately or it may be refolded to bring the adhesive layer back into contact with the release layer whereafter the envelope may be stored ready for re-use.
  • This embodiment is particularly useful where the envelope is formed from a cellulosic web and thus is prone to tear on being opened.
  • the release layer and the adhesive layer can be in any convenient position on the envelope where they can be readily brought into contact with each other.
  • the envelope comprises a wallet portion with extending from one side of the mouth thereof a flap portion which can be folded over the mouth of the wallet to seal the envelope; the adhesive and release layers may conveniently be applied in the form of two adjacent strips either to the sealing flap or to the back of the wallet portion. The envelope can then be folded between the two strips to bring the adhesive into contact with the release layer.
  • the adhesive and release layers can be applied to any conventional form of envelope such as paper or stiffened card envelopes, padded and plastic envelopes and the term "envelope" as used herein also extends to other types of containers such as bags.
  • envelope as used herein also extends to other types of containers such as bags.
  • the invention however is particularly suited to use with heavy duty envelopes, for example those having surface areas (of one major surface)
  • the present invention also provides a method of producing a self-sealing envelope which method comprises applying an elongate release layer and an elongate pressure sensitive adhesive layer to a web, folding said web to bring said pressure sensitive adhesive and release layers into adhering contact, optionally cutting said web into envelope blanks, and forming said web or a said blank into an envelope.
  • self-sealing envelopes may be produced by applying adhesive and release layers either to a continuous web which may then be cut into envelope blanks or to webs already in the form of pre-cut envelope blanks.
  • FIGS 1 and 2 are perspective drawings of two different embodiments of the envelope according to the invention.
  • a self-sealing envelope 1 comprising a wallet portion 2 and flaps 3 and 4. Flaps 3 and 4 may be folded about fold lines 5 and 6. A strip of hot melt pressure sensitive adhesive 7 and a silicone release layer 8 are applied to flap 4 and to the rear of the wallet portion 2 respectively.
  • flap 4 Before the envelope is used, for example whilst it is in storage, flap 4 is folded down along fold line 6 so that adhesive strip 7 holds onto silicone release layer 8. To seal the envelope, flap 4 is unfolded back to detach adhesive strip 7 from release layer 8 and flap 3 is folded down along fold line 5 and pressed against the exposed adhesive strip 7.
  • FIG 2 there is shown an alternative self-sealing envelope 1 having a flap 3 which may be folded along fold lines 5 and 9.
  • An adhesive strip 7 and a silicone release layer 8 are applied, to flap 3 on either side of fold line 9.
  • the rear of the wallet portion 2 of the envelope is provided with a plastic film 10.
  • flap 3 is folded down over along fold line 9 so that adhesive strip 7 adheres to silicone release layer 8.
  • flap 3 is unfolded to detach adhesive strip 7 from release layer 8 and the entire flap is then folded down along fold line 5 to bring the adhesive strip 7 into contact with film 10.
  • the envelope can opened by peeling back flap 3 to detach adhesive strip 7 from film 10. Flap 3 may then be folded- again along fold line 9 so that the envelope can be stored ready for re-use.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)

Abstract

Des enveloppes autocollantes mettant en ÷uvre des adhésifs autocollants possèdent une couche adhésive (7) et une couche décollable (8) destinée à protéger la couche adhésive, cette couche décollable étant appliquée sur une portion de l'enveloppe elle-même.
PCT/GB1990/000536 1989-04-06 1990-04-06 Enveloppes WO1990011943A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8907809.1 1989-04-06
GB8907809A GB8907809D0 (en) 1989-04-06 1989-04-06 Envelopes

Publications (1)

Publication Number Publication Date
WO1990011943A1 true WO1990011943A1 (fr) 1990-10-18

Family

ID=10654586

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1990/000536 WO1990011943A1 (fr) 1989-04-06 1990-04-06 Enveloppes

Country Status (3)

Country Link
AU (1) AU5403690A (fr)
GB (1) GB8907809D0 (fr)
WO (1) WO1990011943A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2716167A1 (fr) * 1994-02-11 1995-08-18 Europ De Papeteri Comp Enveloppe auto-adhésive.
DE19901821A1 (de) * 1999-01-19 2000-07-20 Ficker Otto Ag Briefumschlag mit Klebeverschluß sowie Verfahren und Vorrichtung zu seiner Herstellung
EP1098820A1 (fr) * 1998-05-06 2001-05-16 Ontario Inc. COB AS PEP Systeme de fermeture
US6406586B1 (en) * 1997-12-08 2002-06-18 Luis Joaquin Rodriguez Fastening method and stationery articles produced thereby
WO2003000562A1 (fr) * 2001-06-22 2003-01-03 940981 Ontario Inc. Cob As Pep Enveloppe munie d'un systeme de fermeture
WO2003000561A1 (fr) * 2001-06-22 2003-01-03 940981 Ontario Inc. Cob As Pep Enveloppe munie d'un systeme de fermeture
US6691913B1 (en) 1997-12-08 2004-02-17 Luis J. Rodriguez Self sealing containers
DE10300039A1 (de) * 2003-01-03 2004-07-15 Anton Debatin GmbH Werk für werbende Verpackung Kunststoff-Folienbeutel
EP2700592A3 (fr) * 2012-08-21 2014-06-18 ELLER foodPackaging GmbH Sac destiné à recevoir un petit pain, des sandwichs ou analogues

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1944020A (en) * 1932-05-21 1934-01-16 Vogel Max Envelope
US2384223A (en) * 1942-02-09 1945-09-04 Wilbur Eliza Ellen Wrapper
GB583966A (en) * 1944-08-10 1947-01-03 Internat Plastic Corp Self-sealing paper envelope
CH449402A (de) * 1965-12-27 1967-12-31 Elco Papier Ag Vorm J G Liecht Couvert, das mehrmals geöffnet und wieder geschlossen werden kann
DE2226153A1 (de) * 1972-05-29 1973-12-13 Winkler Duennebier Kg Masch Verfahren zum aufbringen einer schlussklappengummierung an von der rolle arbeitenden briefhuellenmaschinen
DE8703643U1 (de) * 1987-03-11 1988-07-14 Reinhart Schmidt Gmbh, 5600 Wuppertal Versandtaschen-Packungseinheit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1944020A (en) * 1932-05-21 1934-01-16 Vogel Max Envelope
US2384223A (en) * 1942-02-09 1945-09-04 Wilbur Eliza Ellen Wrapper
GB583966A (en) * 1944-08-10 1947-01-03 Internat Plastic Corp Self-sealing paper envelope
CH449402A (de) * 1965-12-27 1967-12-31 Elco Papier Ag Vorm J G Liecht Couvert, das mehrmals geöffnet und wieder geschlossen werden kann
DE2226153A1 (de) * 1972-05-29 1973-12-13 Winkler Duennebier Kg Masch Verfahren zum aufbringen einer schlussklappengummierung an von der rolle arbeitenden briefhuellenmaschinen
DE8703643U1 (de) * 1987-03-11 1988-07-14 Reinhart Schmidt Gmbh, 5600 Wuppertal Versandtaschen-Packungseinheit

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2716167A1 (fr) * 1994-02-11 1995-08-18 Europ De Papeteri Comp Enveloppe auto-adhésive.
US6691913B1 (en) 1997-12-08 2004-02-17 Luis J. Rodriguez Self sealing containers
US6406586B1 (en) * 1997-12-08 2002-06-18 Luis Joaquin Rodriguez Fastening method and stationery articles produced thereby
EP1098820A1 (fr) * 1998-05-06 2001-05-16 Ontario Inc. COB AS PEP Systeme de fermeture
US6290120B1 (en) * 1998-05-06 2001-09-18 Ontario Inc. Cob As Pep Closure system
WO2000043280A1 (fr) * 1999-01-19 2000-07-27 Otto Ficker Ag Enveloppe a fermeture adhesive ainsi que son procede et son dispositif de production
AU761320B2 (en) * 1999-01-19 2003-06-05 Otto Ficker Ag Envelope with an adhesive closure and method and device for producing the same
DE19901821A1 (de) * 1999-01-19 2000-07-20 Ficker Otto Ag Briefumschlag mit Klebeverschluß sowie Verfahren und Vorrichtung zu seiner Herstellung
US6732494B1 (en) 1999-01-19 2004-05-11 Otto Ficker Ag Envelope with an adhesive closure and method and device for producing the same
CZ298416B6 (cs) * 1999-01-19 2007-09-26 Blessof Gmbh Dopisní obálka, zpusob její výroby a zarízení k provádení tohoto zpusobu
WO2003000562A1 (fr) * 2001-06-22 2003-01-03 940981 Ontario Inc. Cob As Pep Enveloppe munie d'un systeme de fermeture
WO2003000561A1 (fr) * 2001-06-22 2003-01-03 940981 Ontario Inc. Cob As Pep Enveloppe munie d'un systeme de fermeture
DE10300039A1 (de) * 2003-01-03 2004-07-15 Anton Debatin GmbH Werk für werbende Verpackung Kunststoff-Folienbeutel
EP2700592A3 (fr) * 2012-08-21 2014-06-18 ELLER foodPackaging GmbH Sac destiné à recevoir un petit pain, des sandwichs ou analogues

Also Published As

Publication number Publication date
GB8907809D0 (en) 1989-05-17
AU5403690A (en) 1990-11-05

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