Security paper with authenticity features in the form of substan

Details Security paper with authenticity features in the form of substan Security paper with authenticity features in the form of substan

1981-10-23

1984-05-29

Ives, P.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428204, 428207, 428323, 428333, 428403, 428438, 428464, 4285377, 428690, 428900, 428913, 428908, 356 71, 2503361, 250363R, 283 8B, 101DIG25, 428917, 428918, 428915, 428211, B32B 2300, B32B 300, G01J 100, D21H 510

Patent

active

044515219

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates to a security paper with luminescing authenticity features as well as to a process for testing such a security paper.
Under the term "security paper" are here to be understood bank notes, check forms, shares and stamps as well as passes, credit cards, check cards, passports, air tickets and other certificates and documents.
In order to prevent forgeries and counterfeiting, it has been attempted for a long time to construct security papers which ought to be protected such that unauthorized persons cannot undetectably change or reproduce them.
Accordingly in the past particularly those security methods have recommended themselves the features of which on the one hand can be tested for authenticity unambiguously by anyone without technical assistance and without particular technical knowledge, but which for the manufacture of the feature make necessary such a high degree of a workman's technical skill that the forger is not in the position professionally subsequently to carry out the manufacturing process.
Particularly in the case of bank notes providing these with genuine water marks and with security threads has proved of value, since these can only be undertaken during paper manufacture by means of expensive equipment. Security features of comparable value are extremely fine, and accordingly technically very demanding, steel gravure patterns.
For some time a strong trend to automation in international money transactions has been evident. Accordingly it has emerged that the authenticity features used up till now are not suited to the same degree for automatic testing. Because the checking machinery does not look at the whole of the security paper presented for testing, it is easer to deceive by imitations than the human senses for which these features were designed. Thereby it becomes necessary additionally to the noted visually testable authenticity features to create further ones which can be detected by automatic testers with comparable security.
Printed forgeries accordingly become more difficult to make if the features provided for an automatic testing cannot be registered by the human senses.
In the meantime in the patent literature a series of optical, electrical and magnetic features have been suggested for rendering security papers secure and suited to machine reading. These authenticity characteristics are suitable for testing in devices such as e.g. cash dispensers; these features cannot, however, be unnoticed by the customer and checked without this being seen at the bank counter and in comparable situations.
In the case of security papers with magnetic security threads one is forced, as overall with magnetically effective features, to position the document exactly in the checking apparatus and to make on both sides close contact with the magnetic field detector such as e.g. a coil, a magnetic head, a sound head, a field plate or the like.
For the same reasons electrically conducting inserts or imprints are excluded as a feature for inconspicuous and rapid checking. Additionally generally a stroke with a pencil serves to imitate such a feature.
Security papers with optical authenticity features have already become known in the automatic testing of which neither exact positioning nor close contact with the testing apparatus is necessary.
In a first group of such features the local absorption at wavelengths in the infrared or the ultrviolet spectral regions is tested; the papers are for this purpose provided by suitable means already during their manufacture with transmission patterns. If one does not wish to take on the disadvantage of a larger surface print into the costs then in the examination of such security papers one must carry out a difficult pattern recognition. Accordingly the range of application is already much restricted.
A known marking of this type can also be imitated with substances which are likewise available in commerce.
In a second group of optical features the fluorescence emission of characteristic materials is used for giv

REFERENCES:
patent: 3447851 (1969-06-01), Remelka et al.
patent: 3533176 (1970-10-01), Weitzberg et al.
patent: 3928226 (1975-12-01), McDonough et al.
patent: 4128674 (1978-12-01), Hedler
patent: 4215289 (1980-07-01), Dehair et al.
patent: 4246128 (1981-01-01), Gallagher et al.

Affiliated with

Also associated with

Rating

Security paper with authenticity features in the form of substan does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Security paper with authenticity features in the form of substan, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Security paper with authenticity features in the form of substan will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1397416