BARRETTE MAGNETIQUE POUR DOCUMENTS, PROCEDE D'APPLICATION ET DOCUMENTS MUNIS D'UNE TELLE BARRETTE

BARRETTE RECTILIGNE ET RELATIVEMENT MINCE 18 POUR ENREGISTRER MAGNETIQUEMENT DES INFORMATIONS CODEES, LAQUELLE ADHERE A UN DOCUMENT COMPRENANT UN SUPPORT 12 PAR EXEMPLE EN PAPIER.LA BARRETTE COMPREND UNE FEUILLE SOUPLE FORMEE D'UNE PREMIERE COUCHE 26 EN MATIERE THERMOPLASTIQUE EXEMPTE DE PARTICULES MAGNETIQUES, QUE L'ON COLLE AU SUPPORT 12 PAR L'APPLICATION DE TEMPERATURE ET PRESSION RELATIVEMENT ELEVEES A UNE ZONE ETROITE ET RECTILIGNE DE CELUI-CI, D'UNE COUCHE INTERMEDIAIRE 28 EN MATERIAU AIMANTABLE FORME DE PARTICULES AIMANTABLES DISCRETES DISPERSEES DANS UNE MATRICE, D'UNE SECONDE COUCHE THERMOPLASTIQUE 30 QUE L'ON COLLE A LA COUCHE INTERMEDIAIRE, ET D'UNE MINCE TRAME PORTEUSE 32 EN MATIERE PLASTIQUE QUI ADHERE DE MANIERE AMOVIBLE A LA SECONDE COUCHE 30.APPLICATION AUX LIVRETS DE BANQUE, DE CAISSES D'EPARGNE, AUX CARTES DE CREDIT ET DOCUMENTS SIMILAIRES, AINSI QU'AUX CARTES D'IDENTITE ET SIMILAIRES. A stripe for magnetically receiving encoded information; the stripe is bonded and adhered to any type of document having a paper substrate onto which the magnetic stripe is deposited, usually in the form of a narrow rectilinear strip, which is raised above the original surface of the paper substrate by embossing the latter during deposition of the magnetic stripe. Basically the invention entails the provision of a flexible sheet for use in forming a magnetic recording medium in the form of a magnetic stripe on a paper substrate, e.g. a document such as a bank passbook. The sheet includes a first layer of magnetic-particle-free thermoplastic material, which is bonded to the paper substrate by application of high temperature and pressure to a local narrow rectilinear area thereof. Above the first layer and permanently bonded thereto is a middle layer of magnetizable material consisting of a plurality of discrete magnetizable particles dispersed in a matrix. Above the middle layer is a second layer of magnetic-particle-free thermoplastic material permanently bonded to the middle layer. A carrier web such as Mylar (a phthalate ester) is detachably bonded to the second layer of thermoplastic material.