Duplex electrostatic copying machine

Details Duplex electrostatic copying machine Duplex electrostatic copying machine

1976-09-15

1978-08-29

Braun, Fred L.

Photocopying

Including fiber optics

271DIG9, 271277, 355 3TR, 355 24, G03G 1500, G03B 2732, G03B 2752

Patent

active

041100255

ABSTRACT:
A chain rotates adjacent to and at the same speed as a photoconductive drum and first and second clamps fixed to the chain grip the edges of copy sheets to move the copy sheets in synchronized contact with the drum for toner image transfer from the drum to the sheets. The first clamp grips an edge of a copy sheet for transfer of an image to the front side of the copy sheet. A turnover actuator and feed roller pair then release the first clamp and move the copy sheet away from the chain. As the second clamp approaches the actuator, it is opened thereby and the feed roller pair feeds the copy sheet back toward the chain so that the opposite edge of the copy sheet is gripped by the second clamp. The copy sheet is thereby turned over and conveyed by the chain to the drum for transfer of a toner image to the back side thereof.

REFERENCES:
patent: 3227444 (1966-01-01), Egan
patent: 3615129 (1971-10-01), Drawe et al.
patent: 3797929 (1974-03-01), Deacon et al.
patent: 3980406 (1976-09-01), Lang

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