Contact printer

Details Contact printer Contact printer

1982-09-15

1984-03-20

Wintercorn, Richard A.

Photocopying

Contact printing

Fluid pressure retention of carrier and receiver in exposure...

355 99, G03B 2720

Patent

active

044377592

ABSTRACT:
A contact printer in which, when a spring roller is rolled over a transparent plate on which an original plate and a photosensitive material are laid one on another, a flexible airtight sheet wound round the spring roller is extended to cover the transparent plate. The distance between the transparent plate and the spring roller is gradually reduced as the spring roller is rolled rearwards, so that the distance between the transparent plate and the point of contact of the airtight sheet to its own rolled part wound round the spring roller is maintained substantially to a fixed value, thereby contacting the original plate and the photosensitive material onto the transparent plate tightly. A squeeze roller may be provided for squeezing air from a space between the transparent plate and the airtight sheet by rolling thereon. A lower step on which the spring roller and the squeeze roller may be held when the printer is not used, can be formed in the front top end of a frame body.

REFERENCES:
patent: 3560089 (1971-02-01), Jones
patent: 3971691 (1976-07-01), Cairns
patent: 4029404 (1977-06-01), Mizukami et al.
patent: 4281922 (1981-08-01), Matsumoto
patent: 4316669 (1982-02-01), Tachiki

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