EP0396428A1 - Beutel mit einer Anzeige von unerlaubtem Öffnen - Google Patents

Beutel mit einer Anzeige von unerlaubtem Öffnen Download PDF

Info

Publication number
EP0396428A1
EP0396428A1 EP90304886A EP90304886A EP0396428A1 EP 0396428 A1 EP0396428 A1 EP 0396428A1 EP 90304886 A EP90304886 A EP 90304886A EP 90304886 A EP90304886 A EP 90304886A EP 0396428 A1 EP0396428 A1 EP 0396428A1
Authority
EP
European Patent Office
Prior art keywords
bag
adhesive
tape
portions
opening
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
EP90304886A
Other languages
English (en)
French (fr)
Inventor
Victor Todman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trigon Cambridge Ltd
Original Assignee
Trigon Cambridge Ltd
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 Trigon Cambridge Ltd filed Critical Trigon Cambridge Ltd
Publication of EP0396428A1 publication Critical patent/EP0396428A1/de
Priority to PT846692U priority Critical patent/PT8466U/pt
Ceased legal-status Critical Current

Links

Images

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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/34—End- or aperture-closing arrangements or devices with special means for indicating unauthorised opening

Definitions

  • This invention relates to bags and is concerned with security bags which exhibit a visible indication if an attempt has been made to gain access to the contents of the bag.
  • such bags are formed of sheet material defining an opening and including first and second portions arranged to be superposed so as to close the opening by means of a band of high tack adhesive applied across one or other portion either from the molten state or in the form of a tape.
  • a band of high tack adhesive applied across one or other portion either from the molten state or in the form of a tape.
  • a bag formed of sheet material and having an opening to enable access to be gained to the interior of the bag wherein the bag includes first and second portions arranged to be superposable so as to close the opening, and a tape comprising a substrate portion which is at least translucent and is differentially bonded to an opaque adhesive, said tape being located in a position where, on superposition of the first and second portions, the tape is adhered to one of said first and second portions by said opaque adhesive.
  • the second portion may be in the form of a flap portion secured to the first portion.
  • the substrate portion of the tape constitutes one or other of the first and second portions.
  • the substrate portion is a separate component in which case said substrate portion may be secured to the other of said first and second portions by other adhesive.
  • the free surface of the substrate portion of the tape is adhered to one of the first and second portions by means of said other adhesive which is preferably a high tack adhesive and the opaque adhesive of the tape is covered by a releasable cover strip.
  • said other adhesive which is preferably a high tack adhesive
  • the opaque adhesive of the tape is covered by a releasable cover strip.
  • the cover strip is removed and the free surface of the opaque adhesive layer thereby revealed is adhered to the other of the portions so that it is superposed over the other of the portions and thereby the opening is closed by said one of the portions.
  • the tape is secured, by the opaque adhesive, to one of the first and second portions of the sheet material in the vicinity of the opening which is provided in said one of the portions and said other adhesive, which is preferably a high tack adhesive preferably covered by means of a releasable cover strip, is applied to the other of the portions of the sheet material.
  • said removable cover strip is removed and the portions are superposed so that said other adhesive becomes bonded to the free surface of the substrate portion of the tape (and also to said one of the portions of sheet material) so as to be superposed over the opening.
  • the opaque adhesive is formed of an opaque composition comprising a transparent adhesive and an opacifying agent therefor.
  • the opacifying agent is disturbed by the solvent and tampering is indicated by a change in opacity.
  • the transparent adhesive may be, for example, a solvent based acrylic adhesive and examples of suitable opacifying agents are barium sulphate, titanium dioxide, Cyan Blue, Phthalocyanine Blue, Benzidine Yellow, and 4B Red.
  • the tape used in accordance with this embodiment is produced by applying a suitable release agent pattern-wise to the substrate portion so that parts of the substrate portion are coated with release agent and parts are not. Thereafter, the opaque adhesive is coated onto the patterned release agent layer.
  • those parts of the opaque adhesive which are applied to the release agent are only weakly bonded to the substrate portion compared to those parts of the opaque adhesive which are directly contacting the substrate portion.
  • any attempts to separate the first and second portions to obtain access to the bag via the opening will result in the opaque adhesive in the weakly bonded areas being transferred to the portion adjacent thereto leaving a corresponding clear area on the substrate portion constituting a visible pattern. Since any attempts to reseal the bag involve the formation of a new interface between the substrate portion and the transferred opaque adhesive, resealing will not obliterate the pattern left on the substrate portion.
  • the opaque adhesive is in the form of an opaque layer coated with transparent adhesive. In this case, if an attempt is made to soften the adhesive with solvent, the opaque layer will be disturbed by the solvent and again tampering will be indicated by a change in opacity. Similar transparent adhesives to those used in accordance with the previous embodiment may be used.
  • the tape used in accordance with this embodiment can be produced by applying a suitable release agent pattern-wise to the substrate portion and thereafter printing an opaque layer on to the substrate over the release agent. Thereafter, the adhesive is coated on to the opaque layer. Those parts of the opaque layer (and the overlying adhesive) which are applied to the areas coated with release agent are only weakly bonded to those areas compared to those parts of the opaque layer (and the overlying adhesive) which are applied directly to the substrate portion. Thus, as in the previous embodiment, any attempt to separate the first and second portions of the bag will generate a visible pattern which cannot be obliterated on resealing.
  • the sheet material from which the bag is made is preferably a transparent, or translucent, thermoplastic plastics material since disruption of the differentially bonded tape can then be readily seen from either surface of the bag. If desired, however, the sheet material may be opaque provided that the substrate portion is sufficiently translucent to permit disruption of the differentially bonded tape to be seen through it.
  • the substrate portion of the tape is formed from a heat shrinkable material such as Mylar HS 65. This provides a secondary defence against tampering by the use of elevated temperature since shrinkage of the tape with heat would cause the bag to become wrinkled.
  • a security code is printed on the bag to provide further evidence of tampering.
  • This can be printed on to the sheet material adjacent the opening so that attempts to tamper with the opening would cause disruption of the security code.
  • the tape is provided with a unique identification at the time it is initially applied to the sheet material. This can be done by printing a suitable code onto the substrate of the tape.
  • the code is printed onto a surface of the adhesive of the tape since attempts to tamper with the bag by interfering with the adhesive would then immediately be apparent because of disruptions to the printed code.
  • the printing is preferably carried out by ink jet printing wherein a series of fine droplets of ink are controlled so as to form the letters, numbers and images forming the desired code.
  • the ink will not have any significant effect on the bond strength of the adhesive. In this way, any attempt to substitute an alternative tape would be very difficult since the code would have to be reproduced exactly.
  • the security code may be printed onto any other adhesive used to form the bag.
  • another aspect of the invention provides a bag formed of sheet material and having an opening to enable access to be gained to the interior of the bag, said bag including first and second portions arranged to be superposable with a layer of adhesive inbetween so as to close the opening and a surface of the layer of adhesive being provided with printed matter.
  • the layer of adhesive carrying the printed matter may be in the form of a tape but is not necessarily so. If it is in the form of a tape it is preferably, but not essentially, a differentially bonded tape of the type used in accordance with the first aspect of the invention.
  • the bag is formed from a single strip 1 of flexible thermoplastics sheet material such as polyethylene or polypropylene which is folded laterally along a fold line 2 to form a first portion 3 and a second portion 4.
  • the thermoplastics sheet material is preferably transparent, partially transparent or translucent, or a combination of opaque and transparent so as to make it easier to see the evidence of tampering.
  • the folded portions 3 and 4 are heat welded to each other in a zone 5 which extends parallel with and close to each of the longitudinal and each of the lateral edges of the portions to produce an envelope-like bag 6 wherein the second portion 4 is longer than the first portion 3 and has a part in the form of a flap portion 7 to form a closure.
  • an opening line in the form of a slit 8 extends across the first portion 3 terminating at each end at the weld zone 5.
  • the slit 8 provides access to the interior of the bag 6.
  • a tape 9 extends across the full width of a part of the flap portion 7 (which has preferably been subjected to corona discharge) and is adhered thereto by a band of high tack adhesive 10 which may optionally have a surface provided with a security code by means of an ink jet printing technique.
  • the adhesive is a hot melt pressure sensitive adhesive such as Fullers DS 5762.
  • the tape comprises a transparent or translucent substrate portion 11 having a first surface constituting a free face of the tape and a second surface coated with discrete areas 12 of release agent and then overcoated with an opacified adhesive 13 comprising a solvent based acrylic adhesive and titanium dioxide.
  • the free surface of the adhesive constitutes another free face of the tape and is preferably provided with a security code by an ink jet printing technique before being covered by a releasable cover strip 14.
  • the opacified adhesive 13 is differentially bonded to the transparent substrate portion 11 in that those areas applied to the release agent 12 are much more weakly bonded than are those areas applied directly to the substrate portion 11.
  • the first surface of the substrate 11 is bonded to the flap portion 7 by the high tack adhesive 10.
  • the items to be held in the bag are introduced into the bag 6 through the slit 8, the cover strip 14 is removed from the tape and the flap portion 7 is folded over onto the portion 3 with the fold line being close to the adjacent laterally extending part of the weld zone 5.
  • the disposition of the tape 9 relative to the fold line of the flap portion 7 is such that when the flap portion 7 is brought down onto the portion 3, the part of the flap portion 7 carrying the tape straddles the slit 8 so that the slit 8 is completely overlain by said part and the tape.
  • the slit 8 is completely sealed and there is no access opening whatsoever to the interior of the bag 6 (see Figure 3).
  • the parts of portion 3 adjacent the slit 8 have previously been subjected to corona discharge to assist adhesion.
  • the bag is produced by folding longitudinally a continuous length of thermoplastic plastics sheet material (after it has been optionally printed as appropriate) into a J-form where it includes a first portion 21 folded longitudinally at 22 so as to be superposed on a part of a second portion 23 so as to leave a flap portion 24 of the second portion 23 exposed.
  • the first portion 21 is heat sealed to the second portion 23 by a longitudinally extending heat seal denoted by reference numeral 25.
  • a longitudinally extending region of the flap portion 24, which region is generally parallel to the heat seal 25, is subjected to a corona discharge to improve its adhesion characteristics in that region.
  • a band of high tack adhesive 28 is applied to that region and is covered by a removable cover strip 27 optionally after having been provided with a security code by means of an air jet printing technique.
  • a differentially bonded tape is provided comprising a transparent or translucent substrate portion 30 having a first surface coated with discrete areas of release agent 31 and overcoated with an opacified adhesive 32.
  • the second surface of the substrate portion 30 constitutes one free face of the tape and the free surface of the adhesive 32, constituting another face of the tape, is adhered to first portion 21, adjacent to slit 29, which has previously been subjected to corona discharge.
  • the free surface of the adhesive 32 is provided with a security code by air jet printing before it is bonded to the first portion 21.
  • the continuous length of sheet material is then cut transversely using a double heat sealing device comprising two pairs of heat sealing jaws between which is located a cutting blade so that the sheet material is cut into adjacent transverse sections each having heat sealed edges.
  • a double heat sealing device comprising two pairs of heat sealing jaws between which is located a cutting blade so that the sheet material is cut into adjacent transverse sections each having heat sealed edges.
  • Each of these sections constitutes a bag in accordance with the invention.
  • the tape will split differentially with those parts of the opaque adhesive 32 which are weakly bonded to the substrate 30 because of the presence of the release agent 31 remaining on the portion 21 and those parts of the adhesive which are more firmly bonded to the substrate portion 30 remaining bonded to the substrate portion 30.
  • a readily visible pattern will be formed constituted by the opaque adhesive 32 remaining on the substrate portion 30 and this can not be obliterated by re-superposing the portions 24 and 21.
  • the tape provides the evidence of tampering and the high tack thermoplastic adhesive 28 maintains the seal over the bag opening.
  • This embodiment is particularly suitable for use with heavy duty bags for the transport of coins.
  • the sheet material of portions 3, 4 and 7 is opaque and a line of perforations 15 is provided across second portion 4 to enable a part of the flap portion 7 to be torn off for use, for example, as a receipt.
  • the substrate portion 11 is transparent and is secured to second portion 4 by a band of high tack adhesive 10 but this band is much narrower than the band used in Figures 1 to 3. Thus the substrate portion 11 is only secured to portion 4 along one marginal strip rather than over its entire width.
  • the desired articles are introduced into the bag via opening 8 in the first portion 3.
  • the flap portion 7 can then be removed via perforations 15.
  • cover strip 14 is removed from the tape and the revealed surface of the opacified adhesive 13 is pressed on to the first portion 3 to close the opening. Any attempts to separate the tape and the first portion 3 will result in the opacified adhesive 13 separating from the substrate portion 11 in the weakly bonded areas and transferring to the surface of first portion 3 causing the formation of a visible pattern which cannot be obliterated by resealing. This disruption of the differentially bonded adhesive layer can be seen through the transparent substrate portion 11.
  • a security code or the like may be provided on the surface of the substrate portion 11 prior to coating with opacified adhesive 13.
  • Low density polyethylene has a low surface energy even after corona discharge treatment.
  • a primer to improve the initial tack and the strength build up of the adhesive 13.
  • suitable primers are emulsions of chlorinated polypropylene or an ink based on titanium dioxide filled nitrocellulose resin. A layer of such a primer is denoted by reference 16 in Figures 6 and 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
EP90304886A 1989-05-04 1990-05-04 Beutel mit einer Anzeige von unerlaubtem Öffnen Ceased EP0396428A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PT846692U PT8466U (pt) 1990-05-04 1992-04-09 Saco aperfeicoado

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8910242 1989-05-04
GB898910242A GB8910242D0 (en) 1989-05-04 1989-05-04 Improvements in or relating to bags

Publications (1)

Publication Number Publication Date
EP0396428A1 true EP0396428A1 (de) 1990-11-07

Family

ID=10656206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90304886A Ceased EP0396428A1 (de) 1989-05-04 1990-05-04 Beutel mit einer Anzeige von unerlaubtem Öffnen

Country Status (2)

Country Link
EP (1) EP0396428A1 (de)
GB (1) GB8910242D0 (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993000269A1 (en) * 1991-06-28 1993-01-07 Trigon Cambridge Limited Security bags
GB2265883B (en) * 1989-06-08 1994-02-16 Mcg Venus Packaging Limited A bag
WO1996004177A2 (en) * 1994-08-02 1996-02-15 Trigon Packaging Corporation Tamper evident seal and tape
US5510171A (en) * 1995-01-19 1996-04-23 Minnesota Mining And Manufacturing Company Durable security laminate with hologram
US5631068A (en) * 1994-08-02 1997-05-20 Trigon Packaging Corporation Self-containing tamper evident tape and label
US5683774A (en) * 1994-12-09 1997-11-04 Minnesota Mining And Manufacturing Company Durable, tamper resistant security laminate
EP0805018A2 (de) * 1996-04-29 1997-11-05 Illinois Tool Works Inc. Kontrollierte abziehbare Versiegelung mit einer Vorbenutzungsanzeige
GB2314830A (en) * 1996-07-04 1998-01-14 Sealed Air Corp Tamper evident bag with wetting indication
US5770283A (en) * 1993-11-02 1998-06-23 Minnesota Mining And Manufacturing Company Tamper-indicating label
US5918983A (en) * 1996-11-08 1999-07-06 Control Paper Co., Inc. Security envelope
US6190043B1 (en) * 1999-11-23 2001-02-20 Jonathan Diplock Front opening plastic secure package with false panel
US6270256B1 (en) * 1997-04-07 2001-08-07 Sealed Air Corporation Tamper evident bag
US6431752B1 (en) 1999-11-23 2002-08-13 Jonathan Diplock Plastic coin transport bag
EP1304295A2 (de) * 2001-10-17 2003-04-23 Anton Debatin GmbH Werk für werbende Verpackung Sicherheitsbeutel mit integrierter Wirkungsanzeige
WO2015178882A1 (en) * 2014-05-19 2015-11-26 Bemis Company, Inc. Resealable flexible packages

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2029611A1 (de) * 1969-01-29 1970-10-23 Avery Products Corp
US4709396A (en) * 1985-12-24 1987-11-24 John H. Harland Company Tamper-evident envelope with indicia underlying cohesive layers
EP0259068A1 (de) * 1986-08-26 1988-03-09 Mardon Wrappings Limited Behälter
EP0341699A1 (de) * 1988-05-13 1989-11-15 Bowater Packaging Limited Behälter und Behälterverschluss mit Anzeige unbefugten Öffnens

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2029611A1 (de) * 1969-01-29 1970-10-23 Avery Products Corp
US4709396A (en) * 1985-12-24 1987-11-24 John H. Harland Company Tamper-evident envelope with indicia underlying cohesive layers
EP0259068A1 (de) * 1986-08-26 1988-03-09 Mardon Wrappings Limited Behälter
EP0341699A1 (de) * 1988-05-13 1989-11-15 Bowater Packaging Limited Behälter und Behälterverschluss mit Anzeige unbefugten Öffnens

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2265883B (en) * 1989-06-08 1994-02-16 Mcg Venus Packaging Limited A bag
WO1993000269A1 (en) * 1991-06-28 1993-01-07 Trigon Cambridge Limited Security bags
US5770283A (en) * 1993-11-02 1998-06-23 Minnesota Mining And Manufacturing Company Tamper-indicating label
WO1996004177A2 (en) * 1994-08-02 1996-02-15 Trigon Packaging Corporation Tamper evident seal and tape
WO1996004177A3 (en) * 1994-08-02 1996-05-09 Trigon Packaging Corp Tamper evident seal and tape
US5631068A (en) * 1994-08-02 1997-05-20 Trigon Packaging Corporation Self-containing tamper evident tape and label
US5798169A (en) * 1994-08-02 1998-08-25 Sealed Air Corporation Self-containing tamper evident seal
US6284337B1 (en) 1994-12-09 2001-09-04 3M Innovative Properties Company Durable security laminate with heat-shrinkable layer
US5683774A (en) * 1994-12-09 1997-11-04 Minnesota Mining And Manufacturing Company Durable, tamper resistant security laminate
US5658411A (en) * 1995-01-19 1997-08-19 Minnesota Mining And Manufacturing Company Durable security laminate with hologram
US5510171A (en) * 1995-01-19 1996-04-23 Minnesota Mining And Manufacturing Company Durable security laminate with hologram
EP0805018A3 (de) * 1996-04-29 1997-12-29 Illinois Tool Works Inc. Kontrollierte abziehbare Versiegelung mit einer Vorbenutzungsanzeige
EP0805018A2 (de) * 1996-04-29 1997-11-05 Illinois Tool Works Inc. Kontrollierte abziehbare Versiegelung mit einer Vorbenutzungsanzeige
GB2314830A (en) * 1996-07-04 1998-01-14 Sealed Air Corp Tamper evident bag with wetting indication
GB2314830B (en) * 1996-07-04 1999-07-14 Sealed Air Corp A tamper evident bag
US5918983A (en) * 1996-11-08 1999-07-06 Control Paper Co., Inc. Security envelope
US6270256B1 (en) * 1997-04-07 2001-08-07 Sealed Air Corporation Tamper evident bag
US6190043B1 (en) * 1999-11-23 2001-02-20 Jonathan Diplock Front opening plastic secure package with false panel
US6431752B1 (en) 1999-11-23 2002-08-13 Jonathan Diplock Plastic coin transport bag
US6886980B1 (en) 1999-11-23 2005-05-03 Jonathan Diplock Plastic coin bag
US7195396B2 (en) * 1999-11-23 2007-03-27 Jonathan Diplock Plastic coin bag
EP1304295A2 (de) * 2001-10-17 2003-04-23 Anton Debatin GmbH Werk für werbende Verpackung Sicherheitsbeutel mit integrierter Wirkungsanzeige
EP1304295A3 (de) * 2001-10-17 2005-04-27 Anton Debatin GmbH Werk für werbende Verpackung Sicherheitsbeutel mit integrierter Wirkungsanzeige
WO2015178882A1 (en) * 2014-05-19 2015-11-26 Bemis Company, Inc. Resealable flexible packages
US10173809B2 (en) 2014-05-19 2019-01-08 Bemis Company, Inc. Resealable flexible packages

Also Published As

Publication number Publication date
GB8910242D0 (en) 1989-06-21

Similar Documents

Publication Publication Date Title
EP1194340B1 (de) Gegenstand mit verbessertem originalitätsverschluss
EP0515086B1 (de) Sicherheitsbeutel und Dichtungsmittel
EP0396428A1 (de) Beutel mit einer Anzeige von unerlaubtem Öffnen
EP0341699B1 (de) Behälter und Behälterverschluss mit Anzeige unbefugten Öffnens
US7223015B2 (en) Tamper-evident closure
AU646815B2 (en) Tamper indicating package
NL9002418A (nl) Zak.
EP0591326B1 (de) Sicherheitsbeutel
US6270256B1 (en) Tamper evident bag
US5399021A (en) Credit card holder
US5620256A (en) Tamper evident security bag
EP0373748B1 (de) Sicherheitsumschlag
GB2138396A (en) Bags with tamper indicators
EP0259068A1 (de) Behälter
EP0105581B1 (de) Säcke
GB2202823A (en) Improvements in or relating to containers
GB2264281A (en) Security bag
GB2314830A (en) Tamper evident bag with wetting indication
IT9021982A1 (it) Miglioramenti in o relativi a sacchetti
PT8466U (pt) Saco aperfeicoado

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR GB

17P Request for examination filed

Effective date: 19910212

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: LAWSON MARDON GROUP UK LIMITED

17Q First examination report despatched

Effective date: 19920910

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: TRIGON CAMBRIDGE LIMITED

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19951019