Note: Descriptions are shown in the official language in which they were submitted.
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rARF FOR S ALING Il~i A FLA~.C ARTICLE OF VALQE AND
PRODUCING SUCH ~,~C ,~~',
BACKGROUND OF TI:;E INVENTION
E,; P~1 d of h Tnv ration
The invention relates to a case for sealing in a flat
article of value, preferably for the visual presentation of
the latter.
There is often the problem, in the business
environment, of leaving a poss~:ble customer with specific
articles of value for appraisal with restricted access, for
example simply in order to inspect them. Thus, for example,
picture agencies send their proposed pictures to an
advertising agency for inspection in the form of a slide.
The advertising agency can then decide whether it wants to
purchase the proposed picture or not. In the first instance,
it opens the case, copies or scans the slide and pays the
agreed fee. However, if the proposed picture does not appeal
to the potential customer, he is supposed to return it. The
invention is to prevent the customer from copying the slide
or photograph and then returning the proposed picture on the
grounds that he does not want to make use of it.
The latter instance could, admittedly, be prevented by
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welding the slide showing the proposed picture, or
photograph, into a case or gluing it in in such a way that
the slide or other article can be taken out only by
destroying the case.
This would have the disadvantage, however, that the
case can no longer be used as a storage folder, which is
annoying, above all when, as is usually the case, useful
information on the article of value is also recorded on the
case.
US-5,060,848 discloses a sealable container having a
closure with a coating which irreversibly indicates that the
container has been opened for the first time. However, the
container is not suitable for placing articles of value for
visual appraisal. In the known container, access to the
article of value can also be easily gained by bypassing the
sealing closure, for example if the container is opened
along an adhesive fold.
SUMMARY OF THE INVENTION
The object on which the invention is based is,
therefore, to provide a case for sealing in a flat article
of value, preferably for the visual presentation of the
latter, which ensures that the first-time opening of the
case is indicated unmistakably and reliably and which is
nevertheless not destroyed and rendered useless by opening.
This object is achieved by means of a case for sealing
in a flat article of value, with at least one base layer,
with a reception region for placing the article of value,
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said reception region being arranged on the base layer, with
at least one sealing region arranged on the reception region
at the edge, with at least one covering layer which can be
fastened over the reception region and the sealing region,
and with a coating which, after the covering layer has been
fastened to the base layer, irreversibly indicates that the
covering layer has been separated from the base layer.
A case according to the invention can be used for the
sealing in and the visual presentation of flat articles of
value of all kinds, such as, for example, photographs,
slides, coins or mailing stamps. The case can easily be
opened and then reused, in particular even reclosed, without
being destroyed. However, t:he first-time opening is
irreversibly indicated, so that:, if the article of value is
returned in the closed case, it is evident that someone
could have had access to the article of value and copied,
exchanged or falsified it. With the case closed, it is not
possible to take the article. of value out of the case
without triggering the indication of first opening, since
the article of value is, as it were, enclosed by the sealing
region. The article of value does not necessarily have to be
enclosed without any gap for this purpose. On the contrary,
it is sufficient if the large~;t gap between the individual
part regions of the sealing region is no larger than the
smallest dimension of the art isle of value to be sealed in.
Also, the article of value does not necessarily need to be
protected by the sealing region on a side on which
protection is achieved in another way.
According to an advantageous embodiment of the
invention, there is provision ~_or the covering layer to have
an adhesive layer corresponding to the shape of the sealing
region. This adhesive layer may be protected, before use,
with an adhesive-repelling protective film. According to an
alternative design variant, the adhesive layer is arranged
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on the base layer.
Pressure-sensitive adhesives are particularly suitable
as the adhesive sealing the case, since they do not: require
any activation, apart from the fact that a protective paper
has to be removed.
However, the use of a water-activatable adhesive is
also advantageous.
According to an advantageous embodiment according to
the invention, the coating for indicating the first-time
opening comprises at least one color layer which bonds with
a first adhesive force to the base layer and with a second
adhesive force to the covering layer when the covering layer
is fastened to the base layer. Furthermore, there are
adhesive force setting means ~rhich locally set the ratio
between the first adhesive force and the second adhesive
force differently.
When the covering layer is separated from the base
layer in order to open the cage, the color layer remains
adhering partially to the covering layer and partially to
the base layer. An irreversible: optical change in the case
thereby occurs. Even when the case is glued together again
after being opened, the color layer has different reflection
properties, since air, which modifies the visual impression
of the color layer irreversibly and in a clearly perceptible
manner, has entered between the color layer and the base
layer or between the color layer and the covering layer.
A particularly advantageous embodiment of the case
according to the invention is defined in that the adhesive
force setting means comprise treatment of the base layer
and/or of the covering layer in places. Films must undergo
pretreatment before printing, in order to ensure that the
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printing ink bonds intensively with the film and a durable
printing image is thus produced. If specific regions of the
film of the case are omitted from printing pretreatment, for~~'
example by being covered, the color layer applied there
bonds only inadequately, and, when there is separation
between the base layer and th~=_ covering layer, the color
layer will remain adhering to that of the two parts which
has undergone the printing prel~reatment. The desired color
layer separation effect during the opening of the case can
thereby be achieved by the simp7-est possible means.
Alternatively or in addition to this, it may be
advantageous to use as adhesive force setting means an
antiadhesive lacquer which is applied in places. In
particular the antiadhesive lacquer can easily be printed on
in the form of a pattern or in the form of lettering, so
that a particular image, such, as, for example, the word
"OPENED", becomes visible when t:he two parts are separated.
In addition or alternatively to this, the adhesive
force setting means may comprise an adhesion promoter
(Primer) which is applied in places. Such an adhesion
promoter, which makes a particularly intimate bond between
the printing ink and the background, can be applied in a
simple way by printing.
A critical factor in all adhesive force setting means
is that they influence the rat~io of the forces with which
the color layer bonds to the base layer, on the one hand,
and to the covering layer, on 1=he other hand, in such a way
that, in places, the force of adhesion to one of the two
parts is greater than the other of the two parts, so that,
when the two parts are separated, the color layer is divided
according to a specific pattern, that is to say part of the
color layer remains on the base: layer and the remaining part
of the colo r layer remains on the covering layer. The
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adhesive coating ensures that the color layer bonds with an
accurately settable force to the region coated with
adhesive.
Said coating may be applied either to the base layer or
to the covering layer selectively.
Furthermore, the use of a transparent film as a base
layer and/or covering layer is advantageous, said film
preferably being inked or printed with a nonopaque light
color. In such a case, a particularly marked contrast is
obtained between the various regions of the color layer if
the two layers are glued togeaher again after the first
opening of the case.
A particularly perceptib:Le contrast effect is also
obtained When the color layer has a dark and/or opaque
color.
The fact that the opening of the case has taken place
is revealed particularly clearly if, according to a further
particularly advantageous embodiment of the invention, a
film deformable by stretching is used as the covering layer
or base layer. In order to release the two parts of the case
from one another and open the case, force must necessarily
be exerted on the case. Under these circumstances, the
covering layer and/or the base layer is permanently
deformed, so that, when the cage is reclosed, the separated
parts of the color layer no :Longer fit exactly into one
another geometrically, as a rEault of which the fact that
opening has taken place is indicated in a particularly
striking way.
If the adhesive force setaing means are provided, at
least in places, in the form oi: a pattern of lines, dots or
the like, a structural or color change becomes clearly
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visible, even if there is only a very small geometric
deviation in position between the two parts, after the
covering layer has been glued b<ick onto the base layer.
Preferably, the covering layer is provided with an
imprint which may contain information on the content of the
article of value sealed in the: case. However, the imprint
may also contain complicated geometric figures or coats of
arms which cannot easily be simulated and thereby ensure
originality. In this instance, it is advantageous if the
imprint is sealed or protected by a laminate layer. Also,
regions for subsequent inscription by hand or by means of
conventional printers may be provided on the covering layer.
By means of appropriate imprint: s, for example, a photograph
or a slide sealed in the case can be provided with a frame
(Passe-partout).
Dishonest attempts to open the case with the aid of
heat, in order to reach the sealed-in article of value by
bypassing the first-opening indicator function, are
frustrated due to the fact that, according to a particularly
advantageous embodiment, the case has a temperature
indicator. This temperature indicator, which may be bonded,
for example, to the base layez~, changes color irreversibly
under heating, so that the attempt to open the case becomes
perceptible.
According to a particularly advantageous embodiment of
the invention, there is provision for producing the covering
layer by folding round part of the base layer.
The invention also relates to a method for producing a
case for sealing in a flat ari~icle of value, with at least
one base layer, with a reception region for placing the
article of value, said reception region being arranged on
the base layer, with at least one sealing region arranged on
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the reception region at the edge, and with at least one
covering layer which is fastened over the reception region
and the sealing region, in which a first material web for
producing the base layer is supplied and is given at
intervals the articles of value to be sealed in, and the
covering layer is fastened oven the articles of value and is
sealed to the base layer in the sealing region.
According to a first advantageous embodiment of the
method, the covering layer is ;produced by folding round the
first material web.
According to an advantageous design variant of the
method, the covering layer is produced from a second
material web which is laminated onto the first material web.
There is no need for a folding-round device in this design
variant.
The invention also relates to an apparatus for
producing a case for sealing in a flat article of value,
with at least one base layer, with a reception region for
placing the article of value, said reception region being
arranged on the base layer, with at least one sealing region
arranged on the reception region at the edge and with at
least one covering layer which is fastened over the
reception region and the sealing region, with a guide for a
first material web for producing the base layer and with a
folding-round device for automatically folding round and
sealing the material web.
Furthermore, the invention also relates to an apparatus
for producing a case for sealing in a flat article of value,
with at least one base layer, with a reception region for
placing the article of value, said reception region being
arranged on the base layer, with at least one sealing region
arranged on the reception region at the edge and with at
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least one covering layer which is fastened over the
reception region and the sealing region, with a guide for a
first material web for producing the base layer and with a
second guide for a second material web for producing the
covering layer and a sealing device for bonding the two
material webs in the sealing region.
Further advantageous embodiments may be gathered from
the subclaims.
The invention is explained in more detail below with
reference to the exemplary embodiments illustrated
diagrammatically in Figures 1 to 9. The illustrations are
not true to scale, in particular the thicknesses of the
individual layers are shown greatly enlarged, as compared
with the other dimensions of the case, for the sake of clear
illustration.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows a top view of an opened case for sealing in
a flat article of value according to the
invention.
Figure 2 shows a central longitudinal section through the
opened case shown in :Figure 1.
Figure 3 shows a longitudinal section through the case in
the closed state.
Figure 4 shows a top view of a further embodiment of the
case.
Figure 5 shows a central longitudinal section through the
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case from Figure 4.
Figure 6 shows a longitudinal section through a further
embodiment.
Figure 7 shows a top view of a further embodiment of the
case.
Figure 8 shows a first embodiment of an apparatus for
producing a case.
Figure 9 shows a second embodiment of an apparatus for
producing a case.
DESCRIPTION OF THE PREFERRED EI~ODIMENT
The case shown in Figure' 1 comprises a rectangular
transparent film piece which is subdivided into a base layer
2 and a covering layer 5 by .means of a folding line 13.
Provided on the base layer 2 is a reception region 3, on
which an article of value 1 is placed. The article of value
1 is fastened there by means of a layer of releasable
adhesive (which cannot be seen in the illustration of Figure
1). The reception region is surrounded all round by a
sealing region 4.
Contrary to the variant chosen in Figure 1, it will
also be possible for the sealing region to have
interruptions or to consist of only a few spots, if this
ensures, in the individual instance, that the article of
value is reliably prevented from being taken out, with the
case closed.
Arranged on the covering :Layer 5 is an adhesive layer 6
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which corresponds in its shape and position to the sealing
region 4, that is to say, when the film piece consisting of
the two layers 2 and 5 is folded round the folding line 13,
the adhesive layer 6 rests on the sealing region 4.
The transparent film piece, which is composed of the
base layer 2 and of the covering layer 5, can be seen again
in the sectional illustration of Figure 2. The peripheral
pressure-sensitive adhesive layer 6 can be seen again on the
covering layer 5. Provided on t:he opposite side carrying the
pressure-sensitive adhesive layer 6 is an imprint which is
indicated symbolically by the two black bars l0a and lOb.
The article of value 1, which bonds to the base layer 2
by means of a layer of lightly bonding adhesive 12, can also
been seen in the region of the base layer 2 in the sectional
illustration of Figure 2. The sealing region surrounding the
article of value 1 or the reception region of the latter has
a coating which is composed as follows. Arranged on the base
layer 2 is an adhesive force setting means comprising an
antiadhesive lacquer 8 which is applied in places and which
is, for example, a silicone: lacquer. The antiadhesive
lacquer is applied in the form of a special geometric
pattern or of lettering, such as, for example, in the form
of the word "OPENED". A continuous layer of an adhesion
promoter 9 is printed on over this locally printed-on layer
of antiadhesive lacquer 8. The: adhesion promoter layer 9 is
covered with a color layer 7 which has been printed onto the
adhesion promoter layer 9. A temperature indicator 11 is
arranged on that side of the base layer 2 which is located
opposite the coating described.
After the covering layer 5 has been folded round onto
the base layer 2, as indicated by the arrow P in Figure 2,
the color layer 7 bonds to the adhesive layer 6 of the
covering layer 5 with a first adhesive force and that side
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of the color layer 7 which faces the base layer 2 bonds to
the latter with a second adhesive force. The ratio of the
two adhesive forces is varied locally by the adhesive force
setting means consisting of the antiadhesive lacquer 8 and
of the adhesion promoter 9, so that the first adhesive force
is greater than the second adhesive force in the regions
with antiadhesive lacquer 8 and the first adhesive force is
lower than the second adhesive force in the regions without
antiadhesive lacquer 8.
The closed case is illustrated in longitudinal section
in Figure 3. The article of value 1 can be viewed through
the transparent covering layer 5, but cannot be extracted
without the case being opened. Even if a transparent plastic
foil is used as covering layer 5 copies of the article of
value cannot be made, because the optical reflections
occurring at the surfaces of tree transparent foil and even a
few scratches which are usually present in the foil would
have such an adverse effect on the quality of the copy so
that it would not be useable ~_or professional applications
as required by picture agenciea for instance. The covering
layer 5 may additionally conta~:n a stripe pattern or similar
means which does not disturb viewing, but prevents usable
copies from being made. Such means could be for instance a
small image or a word, such as "SANIpLE" printed on it.
The closed case can be opened by lifting the covering
layer 5. The color layer 7 bonds firmly to the base layer 2
as a result of the action of 'the adhesion promoter 9, with
the exception of those places which were prepared with
antiadhesive lacquer 8 before the application of the
adhesion promoter. These places are torn out from the base
layer 2 due to the action of the adhesive layer 6 when the
covering layer 5 is pulled oi:f and remain on the adhesive
layer 6, that is to say on the covering layer 5.
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When the base layer 2 and the covering layer 5 are
subsequently glued together again, the part which has
remained on the covering layer,. that is to say that part of
the color layer 7 which was also torn by the adhesive layer
6, could, admittedly, be inserted again into the gaps of the
color layer which have occurred. However, since air has
penetrated between the color :Layer 7 and the base layer 2
due to parts of the color layer 7 being torn out, these
parts have changed light reflection behavior, as compared
with the parts of the color layer 7 which have remained on
the base layer 2. This can be observed through the
transparent covering layer 5, so that the opening operation
is clearly revealed.
If heat is used, the temperature indicator 11 changes
color irreversibly and indicates that an attempt has been
made to open the case by supplying heat, bypassing the
indicator function described above.
The print 10a, lOb arranged on the covering layer 5 may
comprise important data relating to the sealed-in article of
value or else a frame for the latter.
The case shown in Figure 4~comprises, once again, a
rectangular transparent film F~iece which is subdivided into
a base layer 2 and a covering layer 5 by a folding line 13.
A reception region 3, on which an article of value 1 is
placed, is provided on the base layer 2. The article of
value 1 is fastened there by means of a layer of releasable
adhesive (Which cannot be seen in the illustration of Figure
4). The reception region is. surrounded all round by a
sealing region 4. That layer of the sealing region 4 which
is located on the very top in the illustration of Figure 4
is an adhesive layer 6 which corresponds in its shape to the
sealing region 4.
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The transparent film piece, which is composed of the
base layer 2 and of the covering layer 5, can be seen again
in the sectional illustration of Figure 5. Contrary to the
exemplary embodiment of Figurea 1 to 3, the covering layer 5
has only an imprint which is .indicated symbolically by the
two black bars 10a and lOb.
The article of value 1, which bonds to the base layer 2
by means of a layer of lightly bonding adhesive 12, can also
be seen in the region of the .'oase layer 2 in the sectional
illustration of Figure 2. The .sealing region surrounding the
article of value 1 or the rece;~tion region of the latter has
a coating which is composed as follows. Arranged on the base
layer 2 is an adhesive force setting means comprising an
antiadhesive lacquer 8 which i.s applied in places and which
is, for example, a siliconE~ lacquer. The antiadhesive
lacquer is applied in the form of a special geometric
pattern or of lettering, such as, for example, in the form
of the word "OPENED" . A cont:i.nuous layer of an adhesion
promoter 9 is printed on over this locally printed-on layer
of antiadhesive lacquer 8. The: adhesion promoter layer 9 is
covered with a color layer 7 which has been printed onto the
adhesion promoter layer 9. The color layer 7 is covered with
an adhesive layer 6.
A temperature indicator :L1 is arranged on that side of
the base layer 2 which is :located opposite the coating
described.
The case is handled in the same way as described in
connection with the case of Figures 1 to 3, so that a
renewed description may be dispensed with.
The further exemplary embodiment of a case according to
the invention, shown in longitudinal section in Figure 6,
comprises, once again, a transparent film piece which is
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composed of the base layer 2 and of the covering layer 5.
The peripheral pressure-sensitive adhesive layer 6 can be
seen on the base layer 2. A temperature indicator 11 is
arranged on the opposite side carrying the pressure-
sensitive adhesive layer 6.
The article of value 1, which bonds to the base layer 2
by means of a layer of lightly bonding adhesive 12, can also
be seen in the region of the base layer 2 in the sectional
illustration of Figure 6.
Provided on the covering layer 5 is a coating which
corresponds in its shape and. position to the pressure-
sensitive adhesive layer 6 and which is composed as follows:
Arranged on the covering layer 5 is an adhesive force
setting means comprising an antiadhesive lacquer 8 which is
applied in places and which is, for example, a silicone
lacquer. The antiadhesive lacquer is applied in the form of
a special geometric pattern o:r of lettering, such as, for
example, in the form of the word "OPENED". A continuous
layer of an adhesion promoter 9 is printed on over this
locally printed-on layer of antiadhesive lacquer 8. The
adhesion promoter layer 9 is covered with a color layer 7
which has been printed onto the adhesion promoter layer 9.
An imprint, which is symbolized by the black bars l0a and
lOb, is arranged on that side of the covering layer 5 which
is located opposite the coating described.
The case is handled in t:he same way as described in
connection with the case of Figures 1 to 3, so that a
renewed description may be dispensed with.
In the exemplary embodiments described, the covering
layer 5 and the base layer 2 a:re produced by folding round a
film piece. The base layer 2 and the covering layer 5 may,
of course, also be produced from separate film pieces. The
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advantage of such a variant is that the materials of the
covering layer and base layer c:an be selected independently
of one another. Thus, for example the base layer may be made
from opaque basic material a;nd the covering layer from
transparent basic material.
The case shown in Figure 7 comprises, once again, a
rectangular transparent film piece Which is subdivided into
a base layer 2 and a covering layer 5 by a folding line 13.
A reception region 3, on which an article of value 1 is
placed, is provided on the base layer 2. The article of
value 1 is fastened there by means of a layer of releasable
adhesive 12. The exemplary embodiment of Figure 7
corresponds thus far to the exemplary embodiment of Figure
1. Contrary to the example shown in Figure 1, the sealing
region 4 consists of three separate part regions which are
arranged along the edge of the reception region 3. The
reception region 3 is therefore surrounded on three sides by
the sealing region 4, in such a way that the article of
value 1 is reliably prevented from being taken out. This
means that the largest gap between the individual part
regions should be no larger than the smallest dimension of
the article of value 1 to be sealed in. Arranging a sealing
region on the side facing the 'folding line 13 was dispensed
with, since the article of value 1 is protected on this side
by the folded-round covering sheet. More space is thereby
available for the article of value.
Arranged on the covering layer 5 is an adhesive layer 6
which corresponds in its shape: and position to the sealing
region 4, that is to say, when the film piece consisting of
the two layers 2 and 5 is folded round the folding line 13,
the adhesive layer 6 rests on the sealing region 4.
Figure 8 shows an apparatus for producing a case
according to the invention. A material web 15 runs via an
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applicator device 21, that is to say a device with printing
units or with coating appliances. The material web is
printed or coated, in the applicator device, with various
layers, such as the adhesive layer, the color layer, an
antiadhesive lacquer or an adhesion promoter. Alternatively
to this, this printing and/o r coating may take place
completely or partially in another apparatus in a preceding
method step and a correspondingly preprocessed material web
15 may be used. Adhesive points on such a pretreated
material web 15 may be covered by a protective film or the
material web 15 may be wound on itself, the rear side of the
material web 15 being provided. with an adhesive-repelling
smooth layer. If the adhesive points on the material web 15
are covered with a protective film, a pull-off or strip-off
device, which is expediently integrated into the applicator
device 21, must be provided for the protective film.
The material web 15 is also printed with a register
mark in the applicator device 2:1 or in an earlier production
step, said register mark being detected by a sensor 17a of a
dispensing device 17 which keeps in stock various articles
of value 1, each of which is dispensed, under the control of
the sensor 17a, in such a way that it is dispensed onto the
material web 15 in the correct. positioning in relation to
the sealing region provided on the material web 15. The
material web 15 constitutes the base layer of the case.
A second material web lEi, which forms the covering
layer 5, is laminated onto the material web 15 given the
articles of value 1. With the aid of a sealing device 20,
the two material webs are bonded, so that the articles of
value 1 are enclosed between the two material webs 15 and
16, that is to say between the. base layer and the covering
layer. The composite material ~aeb produced in this way runs
through a printer 18, in which it can be printed with
information on the article of value under the control of a
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computer 23. The article of value is detected, in the
dispensing device 17, by the computer 23, so that the
appropriate inscription can be allocated to said article of
value, with some delay, when the latter enters the printer
18.
After leaving the printer 18, the composite material
web is cut, as required, in the cutting unit 22, into
portions which may contain one or more articles of value. If
a plurality of articles of value are contained in one
portion of the composite material web, it is advantageous
if, in the cutting unit 22, a perforating punch is carried
out, by means of which the composite material web may, if
required, be divided by hand.
Figure 9 shows a further embodiment of the apparatus
according to the invention. Contrary to the exemplary
embodiment of Figure 8, in the exemplary embodiment of
Figure 9 only a single material web 15 is provided. The
latter, after being printed in the applicator device 21 and
given the articles of value by means of the dispensing
device 17, is automatically folded along its center line in
a folding device 19, so that the material web 15 forms not
only the base layer, but also at the same time the covering
layer.
Inscription in the printE:r 18 is carried out in the
same way as in the exemplary embodiment of Figure 8, so
that, in this respect, reference should be made to this. The
same applies to the cutting off or perforating of the
material web in the cutting unit 22.
The articles of value 1 may, if desired, also be placed
onto the material web 15 by hand. There is then no need for
the dispensing device 17.
