Method for forming magnetic recording regions on photographic el

Details Method for forming magnetic recording regions on photographic el Method for forming magnetic recording regions on photographic el

1979-05-09

1981-04-07

Pianalto, Bernard D.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427128, 427130, 427131, 430510, B05D 302

Patent

active

042606489

ABSTRACT:
Photographic elements are provided with a magnetic recording region, such as a stripe or layer, that is useful for sound recording, by applying a dispersion of finely-divided magnetic particles in a liquid medium to the element in a predetermined form and solidifying the dispersion by bringing the element into contact with an induction-heating apparatus. The apparatus comprises a rotatable cylindrical roller whose cylindrical surface engages the element and which is heated by induction only within a rim portion thereof so as to generate heat adjacent to the cylindrical surface for efficient transfer to the element.

REFERENCES:
patent: 3705819 (1972-12-01), Heller et al.
patent: 3782947 (1974-01-01), Krall

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