Printed matter – Having revealable concealed information – fraud preventer or... – By removeable material
Reexamination Certificate
1997-12-18
2001-05-08
Fridie, Jr., Willmon (Department: 3722)
Printed matter
Having revealable concealed information, fraud preventer or...
By removeable material
C283S061000, C283S062000
Reexamination Certificate
active
06227574
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a form having an integrated detachable card, it being possible for the form to be of single-layer but in particular multi-layer construction.
The cards may be those which are present in the form in a virtually finished state and only have to be detached. However, there may also be cards which are present in the form not in their final layer construction but in several parts and only have to be finally tailor-made, for example by the user, when being detached, if appropriate by the application of some personalization. Since as a rule a folding operation is associated with this, such cards are also referred to as butterfly cards.
In addition, the cards may be designed such that they initially have the properties of self-adhesive labels or allow self-adhesive labels to be produced from them, for example by pulling off a release paper. The cards may also be designed as so-called vignettes, which are provided to be bonded behind a pane of glass, being provided on their side facing the pane of glass with a specific, if appropriate individual, item of information.
PRIOR ART
Forms with integrated cards of the abovementioned type are known, for example from WO 95/20493 or EP-A1-0 733 490. In the case of the known forms, there is bonded onto the rear side of the primary form material a carrier material which comprises a carrier layer and a peelable glue layer. The card is produced directly in the form in the region of the carrier material by stamping, the stamping being carried out from the front side of the form as far as the carrier layer of the carrier material. The advantage which can be achieved with this design, and which is based on the particular properties of the peelable glue layer, is primarily that the card can be stamped out in a web-free manner and completely around the periphery. The peelable glue is set in such a way that it essentially loses its adhesiveness when the card is detached.
Although suitable peelable glue systems of this type can be implemented in accordance with various principles, these are all associated with a not inconsiderable effort in production and processing. The known peelable glue systems also exhibit a release-value behavior which depends on ambient conditions such as temperature and humidity, and are also therefore industrially not easy to control.
In the case of the previously known forms, on the one hand the overall thickness in the card region is admittedly kept low by including the primary form material in the card, but on the other hand the carrier layer contributes substantially to this overall thickness. From the point of view of processing the forms in printers, in particular using the single-sheet process in laser printers, an overall thickness which is as low as possible in the card area is desired.
DESCRIPTION OF THE INVENTION
The invention, as it is characterized in patent claim
1
, achieves the object of specifying a form with an integrated detachable card which manages without peelable glue and without a carrier layer which is not a constituent part of the finished card. According to the invention, this is achieved by a form in which the card is connected to the material surrounding it, at least partly along its external margin in the form (card margin) via a bridge which is designed as an intended rupture line, the material thickness along the bridge being continuously lower than the overall thickness of the form.
Preferred refinements and developments of the invention are specified in the dependent claims.
The bridge is thus advantageously formed, for example, by an inner or an outer part layer, all the other part layers being severed from one or from both sides of the form along the bridge on the card margin, for example by being stamped. In this case, the bridge can also or alternatively be formed by a residual thickness between two cutting lines which are made from both sides of the form, and are mutually congruent or at least essentially mutually congruent.
The designs mentioned allow the desired retaining value of the card in the form to be set well, to be specific purely geometrically via the depth of the cut or of the cuts or the residual thickness resulting therefrom of the part layer which has been left intact, or via the residual thickness between two cuts made from both sides of the form. For example, a residual thickness in the range between 10 &mgr; and 50 &mgr;, in particular between 15 &mgr; and 25 &mgr;, has proven to be favorable, the optimum value depending on the type of material and/or being determined by the application.
In particular if the form is stamped from both sides and thus provided with incisions along the card margin and the bridge, the card may be separated from the form simply and without there being the risk that the material will tear otherwise than along the bridge as a predefined intended rupture line.
The bridge can be formed over its longitudinal extent in a uniform and web-free manner, or else in cut and web sections that alternate like a sawtooth or in the manner of a perforation. However, as distinct from a “classical” perforation, in this case the material is at least partially cut even in the web sections, so that only said residual thickness is still present in the region of the webs.
By means of a structured or differentiated design of the bridge in this way, the retaining force of the card in the form may be set more precisely and more finely, and good results with regard to its detachment can also be achieved if the bridge is arranged in an outer layer and the remaining part layers are severed only from the side opposite this layer.
By means of additional film covering layers, applied on one or both sides to, for example, a supporting paper layer, it is possible to produce plasticized cards, as in the prior art. Because of their rather unfavorable tearing or tear propagation properties compared to paper, however, the film layers are less suitable for constructing the bridge. The bridge is therefore advantageously constructed, for example, in the supporting paper layer and the film covering layer(s) is/are completely severed along the bridge on the card margin.
In the case where film covering layers are present on both sides, if it is desired to avoid severing these layers from both sides, it is then necessary for one of these layers or a part layer to be used to form the bridge. By structuring the bridge over its length, as mentioned, in the manner of a perforation with very short webs, however, good results with respect to the detachment of the card can also be achieved here, whilst avoiding undesired tearing.
Using additional release layers or additional release layer material, it is also possible to implement butterfly cards, cards containing self-adhesive labels or vignettes.
Since, by comparison with the previously known, at least the carrier layer and the peelable glue layer are dispensed with, it is possible to write on the cards over the entire area on the front and rear side, even when they are still integrated in the form. If film covering layers are present, these may be specifically treated if necessary for the purpose of writability, that is to say, for example, provided with a matt finish.
The subject matter of the present invention is also a method for producing the forms according to the invention of the type previously described, wherein according to patent claim
24
, in order to produce the card, the form is stamped congruently or at least essentially congruently from both sides, at least partly along the card margin.
Stamping on both sides may be carried out on individual forms or on continuous webs, in which the forms are still coherent. It can be carried out from both sides simultaneously in relation to the two sides or else one after another. The requirements which result in this case on the maintenance of register can in principle be coped with.
The concept according to the invention is largely independent of material and thickness. It functions just as well in a simple paper as in a complicated multi-layer c
Fofitec AG
Fridie Jr. Willmon
Morgan & Lewis & Bockius, LLP
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