Photographic printing

Details Photographic printing Photographic printing

1985-03-11

1986-03-11

Wintercorn, Richard A.

Photocopying

Contact printing

Exposing on sensitized printing press plate or cylinder

355 91, G03B 2704, G03B 2720

Patent

active

045752338

ABSTRACT:
An apparatus for exposing boards which are photosensitive on both sides, for production of printed circuits on both sides, to light through films on both sides in which a lower film, a board, and an upper film in registered position on a light-transmitting platen are pressed down by a window and exposed to light on both sides through the platen and window. A pair of registration pins are adjustably positioned in spaced relation along an edge of the platen and corresponding holes in the boards are used to align the boards and films for exposure. The pins are spaced as widely apart as possible to provide maximum registration between boards of varying sizes and films.

REFERENCES:
patent: 3635559 (1972-01-01), Harrell et al.
patent: 3810694 (1974-05-01), Harrell et al.
patent: 4353647 (1982-10-01), Harrell et al.
patent: 4423955 (1984-01-01), Powers

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