Production of magnetic recording cards

Claim 2

A process for producing magnetic cards which comprises: a first step of forming a magnetic transfer sheet by making a partial die cut of a closed figure in only a magnetic recording layer stock of a magnetic transfer sheet comprising a temporary support and the magnetic recording layer stock to be transferred laminated on the temporary support and thereafter peeling off and removing, from the temporary support, parts of the magnetic recording layer stock outside of the region encompassed by said closed-figure partial die cut thereby to cause a magnetic recording layer of island form of said region to be left on the temporary support; a second step of transferring the magnetic recording layer of island form onto a card substrate by placing the surface of the magnetic recording layer of the magnetic transfer sheet thus formed against the surface of the card substrate, heat-ing the magnetic recording layer and removing the temporary support; and a third step of imbedding the magnetic recording layer by placing a press plate with a mirror-finished surface on the magnetic recording layer thus transferred and heating and pressing the same into the card substrate until the outer surface of the magnetic recording layer lies flush in the same plane as that of the card substrate.

Claim 3

A process according to claim 1 which further comprises a fourth step of printing a printed layer of characters and design on the outer surface of the magnetic recording layer of the structure obtained after the third step of imbedding the magnetic recording layer and a fifth step of leveling the card surface by placing, after the fourth printing step, a press plate with a mirror-finished surface against the printed layer thus printed and heating and pressing the printed layer thereby to cause the outer surfaces of the printed layer and the card substrate to lie flush in the same plane.

Claim 4

A process for producing magnetic cards which comprises: a first step of forming a magnetic transfer sheet by making a partial die cut of a closed figure in only a magnetic recording layer stock of a magnetic transfer sheet comprising a temporary support and the magnetic recording layer stock to be transferred laminated on the temporary support and thereafter peeling off and removing, from the temporary support, parts of the magnetic recording layer stock outside of the region encompassed by said closed-figure partial die cut thereby to cause a magnetic recording layer of island form of said region to be left on the temporary support; a second step of placing the outer surface of the magnetic recording layer of island form of the magnetic transfer sheet thus formed against a surface of an oversheet and transferring the magnetic recording layer onto the oversheet by heating the transfer sheet and removing the temporary support; a third step of securing or tentatively securing by adhesion the oversheet to a core sheet; and a fourth step of imbedding the magnetic recording layer by placing a press plate with a mirror-finished surface against the structure obtained by the third step and heating and pressing the same thereby to imbed the magnetic recording layer so that its outer surface lies flush in the same plane as that of the oversheet.

Claim 5

A process for producing magnetic cards which comprises: a first step of forming a magnetic transfer sheet by making a partial die cut of a closed figure in only a magnetic recording layer stock of a magnetic transfer sheet comprising a temporary support and the magnetic recording layer stock to be transferred laminated on the temporary support and thereafter peeling off and removing, from the temporary support, parts of the magnetic recording layer stock outside of the region encompassed by said closed-figure partial die cut thereby to cause a magnetic recording layer of island form of said region to be left on the temporary support; a second step of placing the outer surface of the magnetic recording layer of island form of the magnetic transfer sheet thus formed against a surface of an oversheet and transferring the magnetic recording layer onto the oversheet by heating the transfer sheet and removing the temporary support; a third step of securing or tentatively securing by adhesion the oversheet to a core sheet; and a fourth step of imbedding the magnetic recording layer by placing a press plate with a mirror-finished surface against the structure obtained by the third step and heating and pressing the same thereby to imbed the magnetic recording layer so that its outer surface lies flush in the same plane as that of the oversheet.

Claim 6

A process according to claim 3 which further comprises a fifth step of printing a printed layer of characters and design on the outer surface of the magnetic recording layer of the structure obtained by the fourth and a sixth step of leveling the card surface by placing, after the fifth printing step, a press plate with a mirror-finished surface against the oversheet and heating and pressing the same thereby to cause the outer surfaces of the printed layer and the oversheet to lie in the same plane.

Claim 7

A process according to any of claim 1 in which the magnetic recording layer stock formed on the temporary support of the magnetic transfer sheet has a magnetizable layer comprising a binder resin and magnetic powder particles dispersed therein.

Claim 8

A process according to claim 5 in which the magnetic recording layer stock further has a colored layer between the temporary support and the magnetizable layer.

Claim 9

A process according to claim 6 in which the magnetic recording layer stock further has a nonmagnetic metal layer formed by vapor deposition between the magnetizable layer and the colored layer.

Claim 10

A process according to claim 5, in which the magnetic recording layer stock further has a releasing layer inserted between the magnetizable layer and the temporary support and being in contact with the support for transferring.

Claim 11

A process according to claim 5, in which the magnetic recording layer stock further has a heat-sensitive adhesive layer on the magnetizable layer.

Claim 12

A magnetic card comprising a card substrate and a planar magnetic recording piece of island form formed by die cutting and having smooth, fair peripheral edges, the magnetic recording piece being provided on at least one surface of the card substrate and being so imbedded therein that the outer surface of the magnetic recording piece lies flush in the same plane as that of the card substrate.

Claim 13

A magnetic card comprising a card substrate and a planar magnetic recording piece of island form formed by die cutting and having smooth, fair peripheral edges, the magnetic recording piece being provided on at least one surface of the card substrate and being so imbedded therein that the outer surface of the magnetic recording piece lies flush in the same plane as that of the card substrate.

Claim 14

A magnetic card according to claim 10, in which a printed layer of characters and design is provided on and so imbedded in the magnetic recording piece that the outer surfaces of the magnetic recording piece and the printed layer lie flush in the same plane as the outer surface of the card substrate.

Claim 15

A magnetic card according to claim 10, in which the card substrate comprises a laminated structure of an opaque core sheet and an oversheet made of a transparent resin, and the magnetic recording piece is so imbedded in the oversheet that their outer surfaces lie flush in the same plane.

Claim 16

A magnetic card according to claim 12, in which visible information in harmony with the pattern of the magnetic recording piece is printed on the core sheet.

Claim 17

A magnetic card according to claim 10, in which the magnetic recording piece has a magnetizable layer comprising a binder resin and magnetic powder particles dispersed in the binder resin.

Claim 18

A magnetic card according to claim 14, in which the magnetic recording piece further has a colored layer on the magnetizable layer.

Claim 19

A magnetic card according to claim 15, in which the magnetic recording piece further has a nonmagnetic metal layer formed by vapor deposition and interposed between the magnetizable layer and the colored layer.

Claim 20

A magnetic card according to claim 14, in which the magnetic recording piece has a releasing layer constituting an outer layer.

Claim 21

A magnetic card according to claim 14, in which the magnetic recording piece has a heat-sensitive adhesive layer underneath the magnetizable layer.