Carrier representing value and comprising patterns applied by a

Details Carrier representing value and comprising patterns applied by a Carrier representing value and comprising patterns applied by a

1996-11-21

1999-11-02

Han, Frances

Printed matter

Having revealable concealed information, fraud preventer or...

Utilizing electromagnetic radiation

283 57, 283 58, 283901, B42D 1510

Patent

active

059755830

DESCRIPTION:

BRIEF SUMMARY
The invention relates to a carrier representing value and comprising laser patterns provided by a laser beam which are at least partially recognisable with the eye and which have such a structure that they cannot or only with the greatest difficulties be applied on the carrier by other processes wherein the laser patterns are formed at least by parts removed by the laser beam, and patterns provided by other processes.
Such carriers representing value are generally known, for instance in the form of giro cheques, bank cheques, eurocheques, banknotes, credit cards, shares, bonds and other documents representing a value. The invention otherwise also relates to other types of documents representing a value such as passports, driving licenses and the like.
It is known problem that carriers representing value are forged and falsified. This is becoming an increasingly more significant problem. A constant attempt is made here to keep one step ahead of the forgers. In recent times the use of colour copiers has made increasingly easier forging of documents otherwise difficult to counterfeit, this in principle without too many problems.
The object of the present invention is therefore to provide steps with which carriers representing value are more difficult to forge, so that it is at least temporarily possible to remain one step ahead of the forgers.
This object is achieved in that the laser patterns and the patterns provided by other processes represent the same information.
It will be apparent that these steps make difficult the falsification of carriers representing value.
The use of a laser beam makes it possible to apply particularly fine structures which either cannot be applied with other treating methods, or only with the greatest financial effort.
The use of laser beams moreover enables variation of the width or depth of the channels or perforations, which is almost impossible with other treating methods.
Falsification is further difficult because it is almost impossible to fill in the thus resulting grooves or perforations. Should this nevertheless be achieved, it is then easy to see that there has been tampering. Laser technique furthermore offers the option of providing per se visible patterns with added, invisible patterns which can only be seen with assist means and in which information can be recorded.
The attention is drawn that the patterns are individualizable. This means, that the carriers are each on their own or each group of for instance ten carriers are provided of the same pattern. Such a situation arises for instance with bank cheques or giro cheques, which can be provided of an indication of the account number, and which can be provided with a consecutive number for each of the account numbers. Such carriers representing value are usually produced in groups of 10, 15 or 20 pieces. Of course, such carriers representing value are prepared in substantial quantities. The providing of such individualized patterns on such carriers representing value arises large problems in view of the required substantial speed of production; by the application of laser light these problems are avoided; a laser light source is indeed quickly controllable, so that each giro cheque or cheque can be provided of an individualizable pattern.
As stated before the carriers representing value can be made of paper, of plastic or of another material, for instance textile.
According to a preferred embodiment the patterns are so fine, that these can at least partially only be made visible by means of appliances.
According to another preferred embodiment the patterns are applied in the form of perforations or channels applied by a laser beam.
According to again another preferred embodiment the patterns applied to the carrier representing value are generally personalized.
The invention further relates to a device for applying individualizable recognizable patterns to carriers representing value, comprising a modulable and controllable laser light source for generating a laser beam applying patterns to the carriers representin

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