EP0259068A1 - Récipients - Google Patents

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Publication number
EP0259068A1
EP0259068A1 EP87307368A EP87307368A EP0259068A1 EP 0259068 A1 EP0259068 A1 EP 0259068A1 EP 87307368 A EP87307368 A EP 87307368A EP 87307368 A EP87307368 A EP 87307368A EP 0259068 A1 EP0259068 A1 EP 0259068A1
Authority
EP
European Patent Office
Prior art keywords
container
adhesive
opening
dye
flap portion
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.)
Withdrawn
Application number
EP87307368A
Other languages
German (de)
English (en)
Inventor
David Watson
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.)
MARDON WRAPPINGS Ltd
Original Assignee
MARDON WRAPPINGS 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 MARDON WRAPPINGS Ltd filed Critical MARDON WRAPPINGS Ltd
Publication of EP0259068A1 publication Critical patent/EP0259068A1/fr
Withdrawn legal-status Critical Current

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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 containers and is concerned with containers which exhibit a visible indication if an attempt has been made to gain access to the contents of the container.
  • a container formed of sheet material and having an opening to enable access to be gained to the interior of the container, the container including a flap portion and adhesive for adhering the flap portion to another portion of the container to close the opening, said adhesive being associated with a solvent-­soluble dye whereby an attempt to gain access to the interior of the closed container by treating the adhesive with such a solvent results in dissolution of the dye and the resultant dye solution causes staining which makes it visibly apparent that said attempt has been made.
  • Any suitable adhesive such as a hot melt adhesive or a solvent soluble adhesive may be used.
  • the dye is present in an amount which is effective to produce a dye solution which causes a visibly apparent stain to be produced on the container.
  • the dye is incorporated in the adhesive.
  • the adhesive may be coated onto a masking tape which has been treated with a release agent and which is adhered to one of said portions by the adhesive. In this case, in use the masking tape is removed to expose the adhesive and the portions are then superposed so that they become adhered together by means of the adhesive.
  • adhesive may be provided on both of the portions in order to improve the adhesive bond. In this case, both adhesive layers may be associated with a solvent soluble dye for the purpose above specified. Alternatively, it may be sufficient for one only of the adhesive layers to be so associated with the dye.
  • neither layer may be associated with such a dye since it is a further object of the present invention to provide a container having a flap portion to be adhered to another portion to close the container wherein the adhesive bond between the portions is improved.
  • a second aspect of the present invention provides a container formed of sheet material and having an opening to enable access to be gained to the interior of the container, the container including a flap portion carrying a first adhesive layer and another portion carrying a second adhesive layer, the arrangement being such that the flap portion may be adhered to said other portion to close the opening by means of said first and second adhesive layers.
  • the container may be formed by superimposing portions of the sheet material and joining the same around their edges. If desired, security printing or coded seals may be provided at the edges to make it evident if access to the container has been gained by cutting the edges and subsequently resealing them. Similarly, security printing may be provided in the vicinity of the opening of the container.
  • any suitable sheet material may be used to form the container such as paper, cardboard, thermoplastic plastics film, and combinations of the same.
  • the container is useful in any fields where tamper evident containers are needed such as in banking establishments, prison establishments, retailing, hospitals, examining boards, forensic laboratories, government departments, and the like.
  • the container is in the form of a bag formed of flexible thermoplastic plastics material such as polyethylene.
  • the bag is produced by folding longitudinally a continuous length of the thermoplastic plastics material (after it has been optionally printed as appropriate), into a J-form wherein it includes a first portion 1 folded longitudinally at 2 so as to be superposed on part of a second portion 3 so as to leave a flap portion 4 exposed (Fig. 3).
  • the first portion 1 is heat sealed to the second portion 3 by a longitudinally extending heat seal denoted by reference numeral 5 (Fig. 4).
  • a longitudinally extending region of the flap portion 4, which region is generally parallel to the heat seal 5, is subjected to a corona discharge to improve its adhesion characteristics and three longitudinally extending lines of perforations 6 are provided in that region (Fig. 5).
  • a masking tape 7 formed of a base film of thermoplastic plastics material and coated with a layer of a silicone resin release agent is then coated with a composition 8 comprising a hot melt adhesive and a solvent soluble dye.
  • the adhesive may be a synthetic rubber based pressure sensitive hot melt adhesive of the type known under the designation 089-2505 and marketed by National Adhesives and Resins Limited. This is a pale beige odourless material of 100% solids content. It has a viscosity (Brookfield Thermosel) at 120°C of about 63000 cps and its viscosity at 200°C is . about 3500 cps.
  • the dye may be of the type known as Kenawax Blue AS marketed by Durham Chemicals Limited of Bradford and it may constitute about 2% by volume of the composition.
  • the composition 8 may be applied at a temperature of from about 150°C to 180°C to the masking tape 7 by means of, for example, a hot melt slot coater.
  • the thus coated masking tape is then adhered to the perforated region of the flap portion 4 which had been treated by the corona discharge so that it adheres thereto by means of the composition layer 8 (Fig.6). Thereafter, the first portion 1 is provided with a longitudinally extending cut 9 and this cut 9 serves as the opening to the container proper. Also, a further longitudinal perforation 10 is provided in the flap portion 4 equidistant between the heat seal 5 and the masking tape 7 (Fig.7).
  • the continuous length of film 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 material is cut into adjacent transverse portions wherein each of the transverse portions has heat sealed edges 12.
  • a double heat sealing device comprising two pairs of heat sealing jaws between which is located a cutting blade so that the material is cut into adjacent transverse portions wherein each of the transverse portions has heat sealed edges 12.
  • Each of these transverse portions constitutes a bag and if desired, each transverse portion may be given a sequential number for security purposes.
  • the inner marginal area of the bag adjacent to heat seals 12 may be provided with security printing i.e. printed characters very close to the seals 12 so that any attempt to gain access to the interior 11 by cutting off the seal 12 and subsequently resealing them will be immediately apparent.
  • FIG 8 there is shown an exaggerated section through a bag according to a second aspect of the invention wherein parts corresponding to parts of Figures 1 to 7 are denoted by like reference numerals.
  • the first portion 1 is not heat sealed to the second portion 3 so that access to the interior 11 is gained through a conventional mouth formed between first and second portions 1 and 3.
  • masking tape carrying adhesive composition 8 is applied to the flap portion 4 in the same way as in the previous embodiment.
  • a similar masking tape carrying an adhesive composition 8 ⁇ is applied to the first portion 1 so that when the masking tapes are removed and the bag is closed by folding over the flap portion 4 the two adhesive layers 8 and 8 ⁇ are superposed and adhere together. Because of the double layer of adhesive, a strong bond is produced between portions 1 and 4.
  • any attempt to use a solvent to dissolve the adhesive composition 8 would cause exudation of dye and resultant staining.
  • the dye may be omitted. Although this may mean that an attempt to open the bag by applying a solvent may not be detected, the bond between the first portion 1 and the flap portion 4 will be equally as strong.
  • the second tape (7 ⁇ ) carrying masking composition 8 ⁇ will preferably be of reduced width, compared to tape 7 and will be located adjacent to the opening line 9 on the side remote from the heat seal 5 (as shown by dotted lines in Figure 7).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
EP87307368A 1986-08-26 1987-08-20 Récipients Withdrawn EP0259068A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868620636A GB8620636D0 (en) 1986-08-26 1986-08-26 Containers
GB8620636 1986-08-26

Publications (1)

Publication Number Publication Date
EP0259068A1 true EP0259068A1 (fr) 1988-03-09

Family

ID=10603224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87307368A Withdrawn EP0259068A1 (fr) 1986-08-26 1987-08-20 Récipients

Country Status (2)

Country Link
EP (1) EP0259068A1 (fr)
GB (1) GB8620636D0 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0393841A1 (fr) * 1989-04-18 1990-10-24 Trigon Industries Limited Enveloppe inviolable
EP0396428A1 (fr) * 1989-05-04 1990-11-07 Trigon Cambridge Limited Sac avec indication d'ouverture non autorisée
GB2265883B (en) * 1989-06-08 1994-02-16 Mcg Venus Packaging Limited A bag
WO2000050310A1 (fr) * 1999-02-26 2000-08-31 Antony Brian Jennings Temoin d'effraction pour sac
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
EP1167230A1 (fr) * 2000-06-28 2002-01-02 Sealed Air Corporation (US) Récipient pour preuves médico-légales
US6431752B1 (en) 1999-11-23 2002-08-13 Jonathan Diplock Plastic coin transport bag
CN110329649A (zh) * 2019-05-24 2019-10-15 阳江市杰斐包装材料有限公司 钞票包装袋的封口方式

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2032882A (en) * 1978-09-29 1980-05-14 Franko Plastics Ltd Bags
GB2123791A (en) * 1982-06-25 1984-02-08 Drg Inc Tamper resistance security package
EP0105581A2 (fr) * 1982-10-04 1984-04-18 Decoflex Limited Sacs

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2032882A (en) * 1978-09-29 1980-05-14 Franko Plastics Ltd Bags
GB2123791A (en) * 1982-06-25 1984-02-08 Drg Inc Tamper resistance security package
EP0105581A2 (fr) * 1982-10-04 1984-04-18 Decoflex Limited Sacs

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0393841A1 (fr) * 1989-04-18 1990-10-24 Trigon Industries Limited Enveloppe inviolable
EP0396428A1 (fr) * 1989-05-04 1990-11-07 Trigon Cambridge Limited Sac avec indication d'ouverture non autorisée
GB2265883B (en) * 1989-06-08 1994-02-16 Mcg Venus Packaging Limited A bag
US6270256B1 (en) * 1997-04-07 2001-08-07 Sealed Air Corporation Tamper evident bag
WO2000050310A1 (fr) * 1999-02-26 2000-08-31 Antony Brian Jennings Temoin d'effraction pour sac
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
EP1167230A1 (fr) * 2000-06-28 2002-01-02 Sealed Air Corporation (US) Récipient pour preuves médico-légales
US6632403B1 (en) 2000-06-28 2003-10-14 Sealed Air Corporation (Us) Forsenic evidence container
CN110329649A (zh) * 2019-05-24 2019-10-15 阳江市杰斐包装材料有限公司 钞票包装袋的封口方式

Also Published As

Publication number Publication date
GB8620636D0 (en) 1986-10-01

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

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Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

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Effective date: 19880910

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WATSON, DAVID