Recording medium and method for making a record on the recording

Details Recording medium and method for making a record on the recording Recording medium and method for making a record on the recording

1981-01-16

1982-11-16

Rubinson, G. Z.

Recorders

Record receivers and/or driving means therefor

Laminated, impregnated, or coated bases

346 76R, G01D 1534

Patent

active

043597491

ABSTRACT:
A recording medium of the type having a first coat which is discolorable by the limited application of heat in a limited area includes a second coat of a material having heat-conducting and electrically insulating properties applied on the first coat and a third coat of a material which is electrically conductive applied on the second coat. The third coat is removable in a limited area by the action of an electric arc which is limited in time and area. A record is made on the recording medium by a technique which includes the steps of igniting an electric arc between the third coat and an electrode, maintaining the electric arc until an opening is formed in a portion of the third coat corresponding to the shape of the electrode, and heating the second coat through the opening to an extent that the amount of heat passing into the first coat from the second coat adjacent the opening causes permanent discoloration of the first coat.

REFERENCES:
patent: 3441940 (1969-04-01), Salaman et al.
patent: 3789425 (1974-01-01), Matshushima
patent: 3831179 (1974-08-01), Brill et al.
patent: 3861952 (1975-01-01), Tokumoto et al.
patent: 4305082 (1981-12-01), Kusakawa et al.

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