Copying apparatus exposure device

Details Copying apparatus exposure device Copying apparatus exposure device

1988-04-13

1989-08-01

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Original moves continuously

G03B 2748, G03B 2750, G03B 2770

Patent

active

048537470

ABSTRACT:
An exposure device effects a slit exposure to a photosensitive sheet material moving over an exposure station, and includes two pairs of conveyor rollers disposed on opposite sides of the exposure station. The two pairs of conveyor rollers first convey a photosensitive sheet material forward, passing over the exposure station until one of the two pairs of conveyor rollers holds the trailing end of the photosensitive sheet flat therebetween. Prior to making an exposure, the two pairs of conveyor rollers are rotated in a reverse direction to move the photosensitive sheet back. After the trailing end of the photosensitive sheet is grabbed by the other of the two pairs of conveyor rollers, a shutter is actuated to effect an exposure to the photosensitive sheet with a slit line exposure light while the photosensitive sheet is being moved back, trailing end first.

REFERENCES:
patent: 3992089 (1976-11-01), Hirose et al.
patent: 4129376 (1978-12-01), Yotsukura
patent: 4488803 (1984-12-01), Nishihama et al.
patent: 4576469 (1986-03-01), Shiga et al.
patent: 4627703 (1986-12-01), Suzuki et al.
patent: 4723151 (1988-02-01), Sonezaki et al.

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