Electrophotographic copying apparatus

Details Electrophotographic copying apparatus Electrophotographic copying apparatus

1988-07-15

1990-03-13

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355312, 355326, G03G 1510, G03G 2760

Patent

active

049086677

ABSTRACT:
A photographic copying apparatus for reproducing an original on photosensitive paper. A roll of photosensitive paper mounted in a magazine is fed downwardly and cut into sheets. Each sheet is sucked to a vertically arranged suction conveyor and fed down. At a predetermined position, the feed of the sheet stops. An exposure table which is turnable and movable between two points is turned and pressed against the sheet on the conveyor. The suction conveyor stops sucking the sheet while the exposure table starts sucking it, so that the sheet is handed over to the latter. The table now carrying the sheet moves toward the expsoure unit. On its way, it is turned and passed under a corona charger. As the table reaches and the exposure unit, it is turned again and the light reflected by an original is shed on the sheet for light exposure. The table is then turned to bring its sheet carrying side down and moved in an opposite direction toward the conveyor. The sheet is brought into contact with one of several kinds of developing solutions in tanks which are adapted to be raised into contact with the sheet one after another. Any excess solution applied to the sheet is removed by a squeezer. After this first development cycle, the table is turned by 180 degrees and moved toward the exposure unit again for another cycle of development. This cycle is repeated as many times as the number of colors used.

REFERENCES:
patent: 3810693 (1974-05-01), Matsumoto et al.
patent: 4175857 (1979-11-01), Ragg et al.
patent: 4247191 (1981-01-01), Grace et al.
patent: 4402592 (1983-09-01), Schon et al.

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