EP2630051B1 - Tamper indicating security bag - Google Patents
Tamper indicating security bag Download PDFInfo
- Publication number
- EP2630051B1 EP2630051B1 EP11779469.3A EP11779469A EP2630051B1 EP 2630051 B1 EP2630051 B1 EP 2630051B1 EP 11779469 A EP11779469 A EP 11779469A EP 2630051 B1 EP2630051 B1 EP 2630051B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ink
- layer
- bag
- tamper evident
- release
- 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.)
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Links
- 239000000853 adhesive Substances 0.000 claims description 20
- 230000001070 adhesive effect Effects 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000003851 corona treatment Methods 0.000 claims description 3
- 239000000976 ink Substances 0.000 description 24
- 239000010410 layer Substances 0.000 description 23
- 238000000034 method Methods 0.000 description 15
- 239000000463 material Substances 0.000 description 11
- 238000010276 construction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 239000004831 Hot glue Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
-
- 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
- B65D29/00—Sacks or like containers made of fabrics; Flexible containers of open-work, e.g. net-like construction
- B65D29/04—Net-like containers made of plastics material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2160/00—Shape of flexible containers
- B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/26—Folding sheets, blanks or webs
-
- 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 containers for postal or other purposes having no structural provision for thickness of contents
- B65D27/12—Closures
- B65D27/30—Closures with special means for indicating unauthorised opening
-
- 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
- B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
- B31B2155/001—Flexible containers made from webs by folding webs longitudinally
- B31B2155/0014—Flexible containers made from webs by folding webs longitudinally having their openings facing transversally to the direction of movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
- B31B2155/003—Flexible containers made from webs starting from tubular webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/74—Auxiliary operations
- B31B70/88—Printing; Embossing
Definitions
- This invention relates to tamper indicating security bags according to the preamble of claim 1, and particularly to security bags for the transportation of cash or other valuable items.
- such bags comprise a body having a closure lip which is adapted to seal the bag in such a way that the contents cannot be accessed, without damaging the seal or the bag in such a way as to render any tampering obvious.
- high security bags of this type are constructed with a separate tamper evident tape which is attached to the bag during the manufacturing process, and in a typical example, the tape may be welded to the bag by a heat sealing or sonic welding process, in the case of a thermoplastic bag, or attached by means of an adhesive.
- this construction places a high level of responsibility on the manufacturer, to ensure that the tape is consistently attached to each bag, since again, any variation in manufacturing standards at this point could be difficult to distinguish from an unauthorised attempt at detaching and reattaching the seal.
- WO 01/04014 (Sealed Air Corporation) discloses a tamper evident bag on which the preamble of claim 1 is based.
- a tamper evident security bag comprising a front wall and a rear wall which form a bag having an opening, wherein the rear wall provides an integral closure lip extending beyond the opening which is configured to close the opening in use by being folded over the opening and sealed onto the front wall, the integral closure lip being provided with tamper-evident features including: a patterned release layer, an ink layer applied over the release layer, a thermochromic ink applied in a region away from the release layer and the ink layer, and an adhesive, characterised in that the adhesive is applied to the closure lip covering the tamper evident features and in a region on the rear wall inside the bag opening so that, in use, the rear surface of the edge of the front wall is sealed to the rear wall to close the opening before the closure lip is folded over and sealed onto the front wall.
- the ink and adhesive layers may be formed on an integral closure lip, or on an area of the body of the bag on which the closure lip is to be sealed, or alternatively, some of the layers may be formed on the closure lip whilst some are formed on the sealing area of the body.
- the surface of the material is treated using known techniques such as corona discharge, gas plasma, or chemicals which effectively etch the surface.
- the surface treatment is made discontinuous, for example by covering the surface with a discontinuous barrier prior to treatment, so as to create predetermined areas of untreated material, and so that a subsequent overall coating of ink or adhesive will not be uniformly attached to the surface, causing a clear pattern to be revealed, in the event that a tamperer tries to reopen the closure.
- the initial surface treatment is applied uniformly, but a discontinuous release layer is formed on top of the surface treatment, so that once again, subsequent layers of ink and/or adhesive will be attached with higher bonding strengths in some areas, and lower bonding strengths in others.
- the areas of increased release effect may, for example, be in the form of a message or symbol so as to render the evidence of tampering much more obvious.
- the seal may also incorporate one way temperature reactive inks, such as thermochromic ink, which also enables the bag to show evidence of tampering If it is subjected to heat, cold, or the like, as well as mechanical manipulation or chemical attack.
- the arrangement of the tamper evident ink layers is such that they are enclosed on both sides, that is to say, by the film substrate on one side, and by a layer of adhesive on the other side, so that it is also possible to reduce the risk of pre-tampering. This refers to a scenario in which the would-be tamperer pre-treats the closure device by interfering with the tamper-evident layers before the bag is closed, so that it can be subsequently opened without tamper evidence.
- the bag is formed from a strip of material which is folded over, to form a bag having a front and a rear wall of material connected by a fold forming the inner end, whilst one of the wall sections is left longer than the other, so as to form a closure lip.
- the side edges of the bag may be heat sealed or otherwise welded together, with the heat seals incorporating so-called "security printing".
- pairs of bags can also be produced starting with a continuously extruded tube of film which is flattened and then slit longitudinally, so as to form a pair of facing overlap portions.
- Figure 1 shows a basic method for making security bags from a roll of thermoplastic film 2, in which the web of material is folded in half to form a bag 1 (once the sides are sealed) and has a security tape 3 attached to the mouth to form a tamper evident seal.
- the tape itself can be made from a similar single wound sheet which is then slit into multiple "lanes" for example ten. Security. printing in suitable patterns will generally be applied to the web, before it is split into the individual tape sections.
- a roll 4 of a web which has already been folded in half, as indicated by overlapping sections 6 and 8, can be printed down one edge 10 with security printing, before individual bags 12 are cut from the strip.
- the underlying folded part of the web 8 is made longer than the overlying part 6, so that the edge 10 extends far enough to form a closure lip for the mouth 14 of the bag, once the side edges 16 and 18 have been heat sealed.
- Figures 3 and 4 illustrate an improvement on this process, in which the roll 20 of plastics material consists of a much wider continuous strip which has been folded inwards from both long edges 22, 24, so as to form a "C" shape leaving an exposed open region in the central area of the lower web 26, between the edges 22 and 24 of the flaps formed by the folding, security printing and (for example) receipt areas can then be printed in the exposed region in the central area, thus preforming a series of facing pairs of bags joined by their closure lip portions in the region 26, before separating them by slitting down the central line 28.
- a similar result of C-shaped film with a central gap between two flaps can be achieved from an extruded "tube" of film, by cutting it longitudinally down one side.
- the tube is flattened and stored on a roll. Then, either a longitudinal strip is cut from the centre of the overlying material to expose the central area of the underlying material, or a longitudinal slit could be cut down the length of overlying material of the tube and the inside edges of the material along the slit could be urged apart, for example by "ploughing".
- a first layer of ink 51 is applied in a pattern (in this case in the form of a pair of lines spelling void) directly onto the (preferably transparent/translucent) central area of the lower web (see figures 5a and 6a ).
- the central area 26 is treated to improve the adhesion of ink, for example by corona treatment 52 (see figures 5b and 6b ). These two steps form a release layer because the ink printed before corona treatment will not adhere to the surface on which it is printed.
- a preferred step is carried out whereby a mask of text 53 is applied to the region of the release layer to mask the shadow of the release pattern.
- thermochromic ink 56 is applied to the (preferably transparent/translucent) central area of the web 26 in a region away from the release layer and coating ink layers, such that tampering by heating/cooling the closure is revealed.
- the seventh step is shown in figures 5g and 6g - in this step an adhesive 57, e.g. hot-melt adhesive is applied to the central portion covering all the tamper evident features referred to above.
- an adhesive 57 e.g. hot-melt adhesive is applied to the central portion covering all the tamper evident features referred to above.
- the inside edges 22, 24 of the flaps are urged away from one another to expose a greater area of the central region of the web 26 such that the adhesive can be applied to the region which will form the closure lip and in a region under the mouth of the bag which will face the opposite side of the bag.
- Line 60 in figure 5g represents the position where the flaps will return to when they form the mouth of the bag and it can be seen that the adhesive extends further inwards (2mm inside the mouth of the bag would be enough, but greater than 1 mm could be acceptable and much wider, e.g. 10mm would be effective if somewhat unnecessary).
- a release liner 58 e.g. foil is applied over the adhesive.
- Figure 7 shows a cross sectional schematic view through the web after the eight steps referred to above have taken place and following the eighth step the inside edges 22, 24 of the flaps have been returned to the position they will take up when the web is cut and sealed to form bags.
- the tamper evident features 51-56 appear on a part of the closure lip which will be folded over in use to seal the mouth, but the adhesive 57 extends 2mm below the mouth of the bag and the release liner 58 extends an additional 2mm into the bag beyond the adhesive and a further amount, e.g. 1mm over each side of the adhesive to avoid accidental attachment.
- it is preferred to form a receipt portion 59 by printing on the central area 26 and forming perforations between the receipt portion 59 and the tamper evident portion.
- the web is cut and sealed laterally to attach the flaps to the web underneath, such that the web forms a rear wall and the flaps become the front walls of the bags.
- the lateral cutting and sealing e.g. heat welding
- Figure 8 illustrates a finished bag made by a process such as that of Figures 3 to 7 (with the release liner removed), in which a "rear wall” 30 (i.e. the underside as shown in the drawing) is made longer than the "front wall” 32 (the top surface as seen in the drawings) so as to provide an outwardly extending closure lip 34, the "closed end" 36 of the bag being formed by the fold joining the front and rear walls.
- a "rear wall” 30 i.e. the underside as shown in the drawing
- front wall the top surface as seen in the drawings
- a "fugitive ink” 38 that is to say one which is soluble in water or spittle, is printed in a suitable pattern, on the outside area of the front wall which is to be overlapped by the closure lip in use, whilst the closure lip itself includes the tamper evident features 51-55 in parallel strips separated by the strip of thermochromic ink 56.
- figure 8 included a receipt portion 59 at the top of the bag, however, the receipt portion need not necessarily be at the top of the bag and without the receipt portion at the top, the tamper evident portions of the two simultaneously manufactured bags could be printed closer to each other and the central line 28. in this case, a receipt portion could be manufactured at the closed end 36 of the bag, provided a seal was made further up the bag.
- a seal at the bottom of the bag is represented by numeral 61 with perforations 60 shown beneath the seal to allow the receipt to be detached.
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Description
- This invention relates to tamper indicating security bags according to the preamble of claim 1, and particularly to security bags for the transportation of cash or other valuable items. Generally speaking, such bags comprise a body having a closure lip which is adapted to seal the bag in such a way that the contents cannot be accessed, without damaging the seal or the bag in such a way as to render any tampering obvious.
- Conventionally, high security bags of this type are constructed with a separate tamper evident tape which is attached to the bag during the manufacturing process, and in a typical example, the tape may be welded to the bag by a heat sealing or sonic welding process, in the case of a thermoplastic bag, or attached by means of an adhesive.
- The reason for this method of construction is that it allows the relatively complex layer structure of the tamper evident seal to be pre-formed on a separate tape, rather than on the bag itself.
- However, this also has the disadvantage that it creates an inevitable weakness at the junction of the bag and the tape, where the would-be tamperer can potentially disguise the point of entry, by rewelding or regluing after the unauthorised entry. In other words, since there is already a discontinuity in the structure at this point, it will subsequently be difficult to determine whether the discontinuity was part of the original seal, or has been introduced later.
- In addition, this construction places a high level of responsibility on the manufacturer, to ensure that the tape is consistently attached to each bag, since again, any variation in manufacturing standards at this point could be difficult to distinguish from an unauthorised attempt at detaching and reattaching the seal.
- Similarly, depending on the method of attachment, it may be possible for the tamperer to completely remove the tamper evident tape at its point of attachment and subsequently replace it with tape taken from another similar product. Again, issues of consistency of manufacturing construction will also affect the degree of "tamper evidence" that can be achieved in such circumstances.
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WO 01/04014 - In accordance with the invention, there is provided a tamper evident security bag comprising a front wall and a rear wall which form a bag having an opening, wherein the rear wall provides an integral closure lip extending beyond the opening which is configured to close the opening in use by being folded over the opening and sealed onto the front wall, the integral closure lip being provided with tamper-evident features including: a patterned release layer, an ink layer applied over the release layer, a thermochromic ink applied in a region away from the release layer and the ink layer, and an adhesive, characterised in that the adhesive is applied to the closure lip covering the tamper evident features and in a region on the rear wall inside the bag opening so that, in use, the rear surface of the edge of the front wall is sealed to the rear wall to close the opening before the closure lip is folded over and sealed onto the front wall.
- It will be appreciated that the ink and adhesive layers may be formed on an integral closure lip, or on an area of the body of the bag on which the closure lip is to be sealed, or alternatively, some of the layers may be formed on the closure lip whilst some are formed on the sealing area of the body.
- Preferably, in order to ensure that printing ink reliably adheres to a substrate such as polythene, or other similar film material, the surface of the material is treated using known techniques such as corona discharge, gas plasma, or chemicals which effectively etch the surface. In one embodiment of the invention, the surface treatment is made discontinuous, for example by covering the surface with a discontinuous barrier prior to treatment, so as to create predetermined areas of untreated material, and so that a subsequent overall coating of ink or adhesive will not be uniformly attached to the surface, causing a clear pattern to be revealed, in the event that a tamperer tries to reopen the closure.
- Alternatively, in another embodiment, the initial surface treatment is applied uniformly, but a discontinuous release layer is formed on top of the surface treatment, so that once again, subsequent layers of ink and/or adhesive will be attached with higher bonding strengths in some areas, and lower bonding strengths in others.
- It will be appreciated that the areas of increased release effect may, for example, be in the form of a message or symbol so as to render the evidence of tampering much more obvious.
- The seal may also incorporate one way temperature reactive inks, such as thermochromic ink, which also enables the bag to show evidence of tampering If it is subjected to heat, cold, or the like, as well as mechanical manipulation or chemical attack. Preferably, the arrangement of the tamper evident ink layers is such that they are enclosed on both sides, that is to say, by the film substrate on one side, and by a layer of adhesive on the other side, so that it is also possible to reduce the risk of pre-tampering. This refers to a scenario in which the would-be tamperer pre-treats the closure device by interfering with the tamper-evident layers before the bag is closed, so that it can be subsequently opened without tamper evidence.
- According to a further preferred feature of the present invention, the bag is formed from a strip of material which is folded over, to form a bag having a front and a rear wall of material connected by a fold forming the inner end, whilst one of the wall sections is left longer than the other, so as to form a closure lip. The side edges of the bag may be heat sealed or otherwise welded together, with the heat seals incorporating so-called "security printing".
- Similarly, by starting with an elongate strip whose width is at least four times the intended bag length, it is possible to produce bags in "two-up" formations by folding both free edges of the strip inwards towards the middle. In this way, a continuous fold is formed along each of the opposite edges, providing respective overlap portions. This enables a series of pairs of bags to be formed, which are then separated by slitting the assembly lengthwise down the middle. Preferably, in either case, before the folded portions forming the individual bags are finally cut from the entire length, any required printing of adhesive, or ink, or other pre-treatment of the surface, can be carried out in a continuous fashion, on the central area in the region of the folded over edges.
- Alternatively such pairs of bags can also be produced starting with a continuously extruded tube of film which is flattened and then slit longitudinally, so as to form a pair of facing overlap portions.
- Some embodiments of the invention will now be described by way of example, with reference to the accompanying drawings, in which:
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Figure 1 is a diagrammatic perspective view illustrating a first known process for making tamper evident security bags; -
Figure 2 is a diagrammatic perspective view of a known arrangement for making security bags; -
Figure 3 is a diagrammatic perspective view of a preferred method for making bags according to the present invention together with bags so made; -
Figure 4 is another perspective view of the method according to the present invention; -
Figure 4a is a detailed expanded view of part of the drawing offigure 4a showing a stage in the printing process; -
Figures 5a to 5h show a plan view of the tamper evident region of the bag as layers of tamper evident features are added; -
Figures 6a to 6h show schematically the shown in plan infigure 5a-5h -
Figure 7 shows a cross sectional view of the partially formed bags shown infigures 5h and6h andfigure 7a shows an enlarged portion of a part offigure 7 ; - Referring to the drawings,
Figure 1 shows a basic method for making security bags from a roll ofthermoplastic film 2, in which the web of material is folded in half to form a bag 1 (once the sides are sealed) and has a security tape 3 attached to the mouth to form a tamper evident seal. The tape itself can be made from a similar single wound sheet which is then slit into multiple "lanes" for example ten. Security. printing in suitable patterns will generally be applied to the web, before it is split into the individual tape sections. - In order to produce bags with an integral security feature, on the other hand, as shown in
Figure 2 , a roll 4 of a web which has already been folded in half, as indicated by overlapping sections 6 and 8, can be printed down oneedge 10 with security printing, beforeindividual bags 12 are cut from the strip. As illustrated, the underlying folded part of the web 8 is made longer than the overlying part 6, so that theedge 10 extends far enough to form a closure lip for themouth 14 of the bag, once theside edges - It will be clear, however, from the illustration on
Figure 2 , that this method only allows one bag to be made at a time on the roll, and in view of the fact that attaching a separate tape allows so many more tamper evident portions to be made for a given width of single wound sheet, the method described with respect tofigure 2 has only been used to prepare very basic tamper evident security bags with very few tamper evident features, for example, a single layer of solvent detecting ink coated with adhesive. -
Figures 3 and4 illustrate an improvement on this process, in which theroll 20 of plastics material consists of a much wider continuous strip which has been folded inwards from bothlong edges lower web 26, between theedges region 26, before separating them by slitting down thecentral line 28. - A similar result of C-shaped film with a central gap between two flaps can be achieved from an extruded "tube" of film, by cutting it longitudinally down one side. There are two methods starting with at tube, in both cases, the tube is flattened and stored on a roll. Then, either a longitudinal strip is cut from the centre of the overlying material to expose the central area of the underlying material, or a longitudinal slit could be cut down the length of overlying material of the tube and the inside edges of the material along the slit could be urged apart, for example by "ploughing".
- In order to make the bag according to the invention, having formed the C-shaped web shown in
figures 3 and4 by one of the abovementioned methods tamper evident features are applied to the lower web in thecentral area 26 between theinward edges figures 5a-h and6a-h . It will be seen that the same features are applied in two lanes which can be mirror images about the central dividing line 28: - A first layer of
ink 51 is applied in a pattern (in this case in the form of a pair of lines spelling void) directly onto the (preferably transparent/translucent) central area of the lower web (seefigures 5a and6a ). - Next the
central area 26 is treated to improve the adhesion of ink, for example by corona treatment 52 (seefigures 5b and6b ). These two steps form a release layer because the ink printed before corona treatment will not adhere to the surface on which it is printed. An alternative would be to first treat the whole area then apply a release layer such as silicone. - Third, as shown in
figures 5c and6c a preferred step is carried out whereby a mask oftext 53 is applied to the region of the release layer to mask the shadow of the release pattern. - Fourth an
ink 54 is applied over the release layer as shown infigures 5d and6d . - This may be followed by a second layer of ink 55 (shown in
figures 5e and6e ) if necessary, to improve the opacity of the ink covering therelease pattern 51 and thicken the ink layer, so that a more significant air gap is produced when tampering occurs which leaves some ink attached to the closure lip and the part coating the release pattern adhered to the opposing surface of the closure. - In a sixth step (shown in
figures 5f and6f ) athermochromic ink 56 is applied to the (preferably transparent/translucent) central area of theweb 26 in a region away from the release layer and coating ink layers, such that tampering by heating/cooling the closure is revealed. - The seventh step is shown in
figures 5g and6g - in this step an adhesive 57, e.g. hot-melt adhesive is applied to the central portion covering all the tamper evident features referred to above. In order to provide a double-seal, prior to applying the adhesive theinside edges web 26 such that the adhesive can be applied to the region which will form the closure lip and in a region under the mouth of the bag which will face the opposite side of the bag.Line 60 infigure 5g represents the position where the flaps will return to when they form the mouth of the bag and it can be seen that the adhesive extends further inwards (2mm inside the mouth of the bag would be enough, but greater than 1 mm could be acceptable and much wider, e.g. 10mm would be effective if somewhat unnecessary). - In the eighth step shown in
figures 5h and6h arelease liner 58, e.g. foil is applied over the adhesive. -
Figure 7 shows a cross sectional schematic view through the web after the eight steps referred to above have taken place and following the eighth step theinside edges adhesive 57 extends 2mm below the mouth of the bag and therelease liner 58 extends an additional 2mm into the bag beyond the adhesive and a further amount, e.g. 1mm over each side of the adhesive to avoid accidental attachment. At some stage it is preferred to form areceipt portion 59 by printing on thecentral area 26 and forming perforations between thereceipt portion 59 and the tamper evident portion. - Once the security features have been applied, the web is cut and sealed laterally to attach the flaps to the web underneath, such that the web forms a rear wall and the flaps become the front walls of the bags. The lateral cutting and sealing (e.g. heat welding) would normally take place at equal intervals to form bags of equal width.
-
Figure 8 illustrates a finished bag made by a process such as that ofFigures 3 to 7 (with the release liner removed), in which a "rear wall" 30 (i.e. the underside as shown in the drawing) is made longer than the "front wall" 32 (the top surface as seen in the drawings) so as to provide an outwardly extendingclosure lip 34, the "closed end" 36 of the bag being formed by the fold joining the front and rear walls. In the example shown, a "fugitive ink" 38 that is to say one which is soluble in water or spittle, is printed in a suitable pattern, on the outside area of the front wall which is to be overlapped by the closure lip in use, whilst the closure lip itself includes the tamper evident features 51-55 in parallel strips separated by the strip ofthermochromic ink 56. - Of course, as mentioned above a layer of hot melt adhesive 57 has been applied over the whose area of the closure tip, and also extends into the opening of the bag, but the adhesive is clear and cannot be seen in
figure 8 . When the liner is removed, the rear surface of theedge closure lip 34 is folded over, and sealed on to thefront surface 32. - In this way, a "double seal" is formed at the mouth of the bag, which greatly improves the "tamper evident" capability of the assembly.
- It will be noted that
figure 8 included areceipt portion 59 at the top of the bag, however, the receipt portion need not necessarily be at the top of the bag and without the receipt portion at the top, the tamper evident portions of the two simultaneously manufactured bags could be printed closer to each other and thecentral line 28. in this case, a receipt portion could be manufactured at theclosed end 36 of the bag, provided a seal was made further up the bag. Such an embodiment is shown infigure 9 in which like reference numerals refer to like parts, and a seal at the bottom of the bag is represented by numeral 61 withperforations 60 shown beneath the seal to allow the receipt to be detached.
Claims (5)
- A tamper evident security bag comprising a front wall (32) and a rear wall (30) which form a bag having an opening, wherein the rear wall (30) provides an integral closure lip (34) extending beyond the front wall and being configured to close the opening in use by being folded over the opening and sealed onto the front wall (32), the integral closure lip being provided with tamper-evident features including: a patterned release layer (51, 52), an ink layer (54) applied over the release layer, a thermochromic ink (56) applied in a region away from the release layer (51, 52) and the ink layer (54), and an adhesive (57), characterised in that the adhesive is applied to the closure lip (34) covering the tamper evident features and in a region on the rear wall (30) inside the bag opening so that, in use, the rear surface of the edge (22, 24) of the front wall (32) is sealed to the rear wall (30) to close the opening before the closure lip (34) is folded over and sealed onto the front wall (32).
- A tamper evident security bag according to claim 1 wherein the patterned release layer is formed by a first layer of ink (51) applied in a pattern directly onto the closure lip (34) prior to corona treatment (52).
- A tamper evident security bag according to claim 1 or 2 further comprising a mask of text (53) applied to the region of the release layer to mask the shadow of the release pattern.
- A tamper evident security bag according to any one of claims 1 to 3, including a second layer of ink (55) to improve the opacity of the ink covering the release pattern and thicken the ink layer, so that a more significant air gap is produced when tampering occurs which leaves some ink attached to the closure lip (54) and the part coating the release pattern adhered to the opposing surface of the closure.
- A tamper evident security bag according to any of claims 1 to 4 further comprising a release liner (58), applied over the adhesive (57).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1017734.3A GB2488507B (en) | 2010-10-20 | 2010-10-20 | Tamper indicating security bag |
PCT/GB2011/001507 WO2012052720A1 (en) | 2010-10-20 | 2011-10-20 | Tamper indicating security bag |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2630051A1 EP2630051A1 (en) | 2013-08-28 |
EP2630051B1 true EP2630051B1 (en) | 2016-08-24 |
Family
ID=43334122
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11779469.3A Active EP2630051B1 (en) | 2010-10-20 | 2011-10-20 | Tamper indicating security bag |
Country Status (10)
Country | Link |
---|---|
US (2) | US20140003743A1 (en) |
EP (1) | EP2630051B1 (en) |
CN (1) | CN103201182B (en) |
AU (1) | AU2011317388B2 (en) |
BR (1) | BR112013009568A2 (en) |
GB (1) | GB2488507B (en) |
PL (1) | PL2630051T3 (en) |
PT (1) | PT2630051T (en) |
RU (1) | RU2585715C2 (en) |
WO (1) | WO2012052720A1 (en) |
Families Citing this family (10)
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US10661963B2 (en) * | 2014-04-04 | 2020-05-26 | Polytex Fibers Corporation | Peelable easy open plastic bags |
CN102963036B (en) * | 2012-11-28 | 2014-03-26 | 无锡市铁民印刷机械有限公司 | Method for processing plastic bag with side surface folding edges |
US20140165746A1 (en) * | 2012-12-19 | 2014-06-19 | Coby Webb | Scent Collection and Retention |
US11542080B2 (en) | 2013-05-07 | 2023-01-03 | BBB Holding Company | Track and trace packaging and systems |
US10029841B2 (en) * | 2013-05-07 | 2018-07-24 | Baby Blue Brand | Damage indicating packaging |
DE202013007985U1 (en) | 2013-09-02 | 2013-12-18 | Britton Decoflex Ltd. | Bag for transporting samples |
US11305927B2 (en) | 2014-04-04 | 2022-04-19 | Polytex Fibers Llc | Easy open plastic bags |
US20150342315A1 (en) * | 2014-05-29 | 2015-12-03 | Superior Bag Manufacturing Company LLC | Single use secure travel bag with tamper-evident closure |
CN110662705B (en) * | 2017-03-02 | 2022-08-19 | 吉迪恩·谢尔佩斯 | Safety bag |
CN112770977A (en) * | 2018-11-08 | 2021-05-07 | 快洛客公司 | Tamper evident package and method of manufacture using a non-contact sealing device |
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US3045891A (en) * | 1959-09-11 | 1962-07-24 | A Aba Cellophane Products Corp | Continuous envelopes |
US3194124A (en) * | 1961-11-17 | 1965-07-13 | Flex O Glass Inc | Method of forming tear-off bag supply |
DE3153362C2 (en) * | 1980-09-26 | 1998-08-20 | Fmc Corp | Process for stacking bags of thermoplastic material and device for carrying out this process |
GB2123791B (en) * | 1982-06-25 | 1985-10-02 | Drg Inc | Tamper resistant security package |
GB2145997B (en) * | 1983-09-02 | 1986-12-31 | Interpoly Ltd | Tamperproof bag |
US4566627A (en) * | 1983-09-27 | 1986-01-28 | Westvaco Corporation | Tamper detection envelope |
US4557505A (en) * | 1984-01-05 | 1985-12-10 | Minnesota Mining And Manufacturing Company | Stress-opacifying tamper indicating tape |
EP0167379A3 (en) * | 1984-07-02 | 1987-08-19 | Techsearch Incorporated | Security bag |
US4694959A (en) * | 1986-01-29 | 1987-09-22 | Minigrip, Inc. | Maintaining single link chain bags against skewing |
US4834552A (en) * | 1988-03-23 | 1989-05-30 | Makowka Kenneth R | Tamper-evident seal for envelope and method of making same |
US5060848A (en) * | 1988-05-13 | 1991-10-29 | Frederick R. Ewan | Tamper indicating containers and seals |
US4998666A (en) * | 1988-05-13 | 1991-03-12 | Frederick R. Ewan | Tamper indicating containers and seals |
US5103979A (en) * | 1989-10-11 | 1992-04-14 | Oscar Mayer Foods Corp. | Package having peel seal tamper-evidence message |
EP0487788B1 (en) * | 1990-11-28 | 1996-02-28 | Crescent Holding N.V. | Method and apparatus to implement double opposed containers fed as a continuous band to filling stations and apt to be sealed by welding, as well as the packages thus obtained |
DE69023653T2 (en) * | 1990-11-28 | 1996-05-02 | Crescent Holding | Process for the production of containers made of flexible material with multilayer walls and practically aseptic inner surface and a continuous band of containers obtained therefrom. |
GB2270857B (en) * | 1992-09-04 | 1996-11-13 | Antony Brian Jennings | Tamperproof container |
US5631068A (en) * | 1994-08-02 | 1997-05-20 | Trigon Packaging Corporation | Self-containing tamper evident tape and label |
US5918983A (en) * | 1996-11-08 | 1999-07-06 | Control Paper Co., Inc. | Security envelope |
IL124635A (en) * | 1998-05-25 | 2003-07-31 | Linnewiel Ron | Tamper evident tapes and labels |
GB2346363A (en) * | 1999-02-05 | 2000-08-09 | Learoyd Packaging Ltd | Security bag with a heat sensitive tamper evident seal |
US6264033B1 (en) * | 1999-07-09 | 2001-07-24 | Sealed Air Corporation | Article with improved tamper evidence |
US6632403B1 (en) * | 2000-06-28 | 2003-10-14 | Sealed Air Corporation (Us) | Forsenic evidence container |
US6756097B2 (en) * | 2001-10-25 | 2004-06-29 | Ccl Label, Inc. | Re-sealable bag closure label and related method of manufacture |
US7104942B2 (en) * | 2003-05-21 | 2006-09-12 | Greg Tan | Side seamed plastic produce bag, method of making and dispenser for same |
US7223015B2 (en) * | 2003-06-25 | 2007-05-29 | Superior Bag Manufacturing Corporation | Tamper-evident closure |
WO2005005141A1 (en) * | 2003-07-02 | 2005-01-20 | Sonoco Development, Inc. | Tamper evident flow wrap |
US20050036716A1 (en) * | 2003-08-11 | 2005-02-17 | Ampac Plastics Llc | Tamper indicating security bag |
DK1714895T3 (en) * | 2005-04-18 | 2009-11-30 | Kraft Foods R & D Inc | Packaging, food product wrapped in a packaging, as well as a method for producing a packaging material or for packaging a food product, and packaging material prepared therefrom |
EP1798707A3 (en) * | 2005-12-15 | 2008-05-14 | Sandora Sales and Manufacturing Ltd. | Tamper evident label |
AT510520B1 (en) * | 2010-08-13 | 2013-02-15 | Hueck Folien Gmbh | SAFETY LABEL WITH MANIPULATION DETECTION |
-
2010
- 2010-10-20 GB GB1017734.3A patent/GB2488507B/en not_active Expired - Fee Related
-
2011
- 2011-10-20 WO PCT/GB2011/001507 patent/WO2012052720A1/en active Application Filing
- 2011-10-20 RU RU2013122885/12A patent/RU2585715C2/en not_active IP Right Cessation
- 2011-10-20 PT PT117794693T patent/PT2630051T/en unknown
- 2011-10-20 US US13/880,716 patent/US20140003743A1/en not_active Abandoned
- 2011-10-20 AU AU2011317388A patent/AU2011317388B2/en not_active Ceased
- 2011-10-20 BR BR112013009568A patent/BR112013009568A2/en not_active IP Right Cessation
- 2011-10-20 CN CN201180050582.9A patent/CN103201182B/en active Active
- 2011-10-20 EP EP11779469.3A patent/EP2630051B1/en active Active
- 2011-10-20 PL PL11779469T patent/PL2630051T3/en unknown
-
2015
- 2015-01-20 US US14/601,154 patent/US20150225128A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
AU2011317388A1 (en) | 2013-05-02 |
BR112013009568A2 (en) | 2016-07-12 |
GB201017734D0 (en) | 2010-12-01 |
RU2013122885A (en) | 2014-11-27 |
GB2488507B (en) | 2014-06-04 |
EP2630051A1 (en) | 2013-08-28 |
CN103201182A (en) | 2013-07-10 |
CN103201182B (en) | 2015-09-09 |
GB2488507A (en) | 2012-09-05 |
US20150225128A1 (en) | 2015-08-13 |
RU2585715C2 (en) | 2016-06-10 |
US20140003743A1 (en) | 2014-01-02 |
PL2630051T3 (en) | 2017-09-29 |
PT2630051T (en) | 2016-11-11 |
WO2012052720A1 (en) | 2012-04-26 |
AU2011317388B2 (en) | 2015-05-14 |
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