Dry film developer for an aperture card printer

Details Dry film developer for an aperture card printer Dry film developer for an aperture card printer

1987-04-09

1988-12-27

Goldberg, E. A.

Electric heating

Heating devices

Combined with diverse-type art device

100292, 219388, 355 3FU, H05B 320

Patent

active

047942240

ABSTRACT:
An improved dry film developer for use with a machine of the type that processes aperture cards which developer incorporates a holding mechanism for holding and stretching the aperture card while a heating block having an arcuate projecting surface is urged against the undeveloped dry film, mounted in the aperture card, to slightly stretch the film so as to insure a uniform contact of the undeveloped film with the heating block for a period of time sufficient to develop the film.

REFERENCES:
patent: 2638964 (1953-05-01), Andina
patent: 3321353 (1967-05-01), Zelnick
patent: 3570064 (1971-03-01), DeGroot
patent: 3808772 (1974-05-01), Turtschan
patent: 3826896 (1974-07-01), Thompson
patent: 3856460 (1974-12-01), Hynes
patent: 4068448 (1978-01-01), Modeen
patent: 4420923 (1983-12-01), Moser
patent: 4603541 (1986-08-01), Medwed

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