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Machine translation
1. (WO1982000214) A PERMANENT RECORD MEDIUM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1982/000214    International Application No.:    PCT/GB1981/000131
Publication Date: 21.01.1982 International Filing Date: 03.07.1981
IPC:
B41M 5/124 (2006.01), B42D 15/10 (2006.01), G06K 19/02 (2006.01), G06K 19/06 (2006.01)
Applicants: AVIS, Robert, Jack;
Inventors: AVIS, Robert, Jack;
Priority Data:
Title (EN) A PERMANENT RECORD MEDIUM
(FR) SUPPORT D'ENREGISTREMENT PERMANENT
Abstract: front page image
(EN)The medium comprises a plurality of layers of laminar material (15, 16, 17, 18, 19) including two outer layers (15, 16) of tear-resistant, transparent, impermeable material and at least one inner layer (19) sandwiched between the two outer layers, this inner layer being made from a material on which optically distinguishable marks appear when the record medium is subjected to localised pressure above a certain threshold value. This effect is obtainable by including with the inner layer (15) a material (14) incorporating micro-encapsulated inks which permeate the material upon rupture under pressure of the micro-encapsulation. A method of manufacturing identity cards and other such documents employing the permanent record medium is also disclosed.
(FR)Le support comprend une pluralite de couches d'un materiau laminaire (15, 16, 17, 18, 19) comprenant deux couches exterieures (1, 16) en materiau impermeable, transparent, resistant au dechirement et au moins une couche interieure (19) prise en sandwich entre les deux couches exterieures, cette couche interieure etant faite en un materiau sur lequel des marques perceptibles optiquement apparaissent lorsque le support d'enregistrement est soumis a une pression localisee superieure a une certaine valeur de seuil. Cet effet peut etre obtenu en incluant dans la couche interieure (15) un materiau (14) comportant des encres microencapsulees qui filtrent le materiau lors de la rupture sous pression de la microencapsulation. Un procede de fabrication de cartes d'identites et d'autres documents semblables utilisant le support d'enregistrement permanent est aussi decrit.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)