POCHETTE DE SECURITE

SECURITY POUCH

Abrégé français

L'invention concerne une pochette de sécurité (10) en matière plastique, destinée à recevoir et transporter des objets de valeur et comprenant une couche de matière plastique inférieure (11) et une couche de matière plastique supérieure (12) qui sont reliées en formant une ouverture d'accès (16) pouvant être fermée. Au moins par endroits, la pochette de sécurité est dotée d'une couche indicatrice (17) qui est formée d'une ou plusieurs strates et qui provoque un virage de la couleur en cas de détérioration mécanique et en particulier d'entaille.

Abrégé anglais

A security pouch made of plastic, which is used to receive and to
transport valuables, has a lower and an upper plastic layer, which are
joined to each other, forming a closable access opening. At least in some
sections, the security pouch is provided with a single-layer or multi-layer
indicator layer, which produces a color change in the event of mechanical
damage and, in particular, slitting.

Revendications

5
Claims
1. Security pouch (10) made of plastic, which is used to receive and to
transport valuables and which has a lower (11) and an upper (12)
plastic layer that are joined to each other, forming a closable
access opening (16), characterized in that, at least in some
sections, the security pouch (10) is provided with a single-layer or
multi-layer indicator layer (17), which produces a color change in
the event of mechanical damage.
2. Security pouch according to the claim 1, characterized in that the
indicator layer (17) is disposed on the interior side and/or on the
exterior side of the upper plastic layer (12).
3. Security pouch according to either one of the claims 1 or 2,
characterized in that the indicator layer (17) is disposed on the
interior side and/or exterior side of the lower plastic layer (11).
4. Security pouch according to any one of the claims 1 to 3,
characterized in that the indicator layer (17) is printed on or
sprayed on.
5. Security pouch according to any one of the claims 1 to 4,
characterized in that the indicator layer (17) contains two reaction
media, which are separated spatially, wherein the spatial
separation can be eliminated by the mechanical damage.
6. Security pouch according to the claim 5, characterized in that the
reaction media are separated from each other by a membrane or
separating layer.

6
7. Security pouch according to any one of the claims 1 to 4,
characterized in that the indicator layer contains at least one
reaction medium, which produces a color change on making contact
with oxygen.
8. Security pouch according to the claim 7, characterized in that the
reaction medium is encapsulated in the indicator layer.

Description

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CA 02749179 2011-07-07
Accurate translation of PCT/EP2010/000078 as filed on January 11, 2010
23801.7
Security Pouch
The invention concerns a security pouch made of plastic, which is used to
receive and to transport valuables and which has a lower and an upper
plastic layer that are joined to each other, forming a closable access
opening.
Such a security pouch is constituted by two plastic layers lying one on
top of the other, each of which is rectangular in shape and joined or
welded to each other along their peripheral edges. An access opening is
constituted in one of the layers, through which a user can insert or
remove valuables or documents into or out of the storage space formed
by the two plastic layers. The access opening can be closed tight by
means of an integrated closure flap, wherein various tampering indicators
are constituted in the region of the closure, which indicate whether an
unauthorized third party has attempted to open the security pouch by
applying heat/cold or solvent. The tampering indicators applied to the
access opening or closure flap are now so far developed that it is almost
impossible for an unauthorized person to access the valuables located
inside the security pouch without this being noticed.
However, in practice it has been shown that the greatest security risk for
such a security pouch occurs when an unauthorized person slits open the
security pouch so that he or she can remove money or valuables from
the storage space of the security pouch.
The object of the invention is to create a security pouch of this type, for
which the risk that slitting the security pouch will go unnoticed is
considerably reduced.
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II
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2
This task is inventively solved with a security pouch with the
characteristics of claim 1. Therein, at least in some sections, the security
pouch is provided with an indicator layer, which produces a color change
in the event of mechanical damage. The indicator layer is constituted
such that, particularly when it is slit or cut into, a clearly visible color
change similar to a bleeding wound is produced in the region of the cut,
which is irreversible and immediately noticeable to any user. It is
therefore no longer possible to slit open the security pouch without this
being noticed.
The indicator layer can be disposed on the interior side and/or on the
exterior side of the upper plastic layer and preferably also on the interior
side and/or exterior side of the lower plastic layer. The indicator layer for
its part can be single-layered or multiple-layered, wherein it is preferably
printed on or sprayed on.
In one possible embodiment of the invention, the indicator layer
comprises two reaction media A and B, which are separated spatially,
wherein the spatial separation can be eliminated by the mechanical
damage or slitting. In one possible embodiment, the two reaction media
A and B can be separated from each other by a membrane. When the
indicator layer is slit, this membrane is damaged, wherein the two
reaction media make contact with each other and react with each other
to produce a color change. Alternatively, it is also possible to locate a
first reaction medium A in a first layer, to dispose a very thin separating
layer on it, and to dispose a second layer on top of that, which contains
the other reaction medium B. When the security pouch and therefore the
indicator layer is slit, the separating layer is also slit, so that, in the
region of the slit, the reaction medium A from the one layer makes
contact with the reaction medium B from the other layer with which it
reacts, thereby producing a color change.
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III
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In an alternative embodiment of the invention, the indicator layer can
contain at least one reaction medium, which produces a color change
upon making contact with oxygen, in particular, from the air. This can be
achieved by encapsulating the reaction medium in the indicator layer, so
that it does not come into contact with the ambient air. Only when the
indicator layer is slit does the reaction medium located in the region of
the slit make contact with the ambient air and react with the oxygen
contained in the air, thereby producing a color change.
Further details and characteristics of this invention are provided by the
following description of an embodiment with reference to the drawing,
wherein the one figure provided shows a schematic perspective view of
the inventive security pouch.
The security pouch 10 depicted in the figure comprises a lower plastic
layer 11 and an upper plastic layer 12 lying on top of it. Each of the
plastic layers 11 and 12 is rectangular in shape, wherein the lower plastic
layer 11 extends beyond the upper plastic layer 12 along the top edge to
form a closure flap 13. The two plastic layers 11 and 12 are welded to
each other along three peripheral edges by means of welded seams 14.
An access opening 16 is constituted at the fourth top edge of the upper
plastic layer 12, through which the user can insert or remove valuables
or documents into or out of the storage space constituted by the two
plastic layers 11 and 12. The security pouch 10 can be closed by the user
folding over the protruding closure flap 13 over the lower plastic layer 11
(see arrow 15) and sealing it with the upper plastic layer 12. However,
other embodiments of the access opening and other closing mechanisms
are also known.
The upper plastic layer 12 is preferably provided with a single- or
multiple-layer indicator layer 17 over its entire surface, which is
preferably sprayed onto or printed onto the upper plastic layer 12. In the
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same way, the lower plastic layer 11 is provided with an identical
indicator layer 17 on at least one of its surfaces and preferably on its
outside surface not depicted in the diagram. The indicator layer 17 is
constituted such that when it is mechanically damaged, in particular,
when it is slit, a color change is produced in the region of the cut.
To prevent such a color change from occurring during manufacture of the
security pouch, no such indicator layer should exist in the region of the
lateral edges of the upper and lower plastic layers, which are usually cut
from an endless strip, so that no color change is produced by this cutting
operation. The region of the plastic layers where the welding seams 14
are constituted on the final security pouch should also be constituted
without an indicator layer. Preferably, the materials that constitute the
plastic layers are provided with the indicator layer at the beginning of the
manufacturing process, which can be performed by printing on or
spraying on. Alternatively, it is also possible to initially manufacture the
security pouch without an indicator layer and to subsequently print or
spray the latter onto the pre-manufactured security pouch.
Ill

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