Optical system for imaging an electrophotographic member

Details Optical system for imaging an electrophotographic member Optical system for imaging an electrophotographic member

1983-10-04

1985-01-15

Prescott, A. C.

Photocopying

Including fiber optics

355 11, 355 14R, 346 76L, G03G 1500

Patent

active

044935498

ABSTRACT:
A digital plate maker system to receive graphics and text data and selectively discharge incremental areas of a charged electrophotographic member to form thereon the latent images represented by the graphics and text data, the imaged member thereafter being toned and output from the system. Thereafter, the toned image may be fused on the member and the member being used in an offset lithographic printing press. The digital platemaker system includes an optical system which may form a maximum of 22 individual rays which are direct deflected twice through a field flattening lens and then onto the charged member. The optical system further includes an optical scale or grating which provides electrical signals indicating the precise location of the individual rays along scan lines on the member. The digital plate maker system further includes an electronic system which generates electrical signals to form the 22 individual rays. The text data is used to modulate signals produced by the graphics data, the result of the modulation being the beam control signals used to form the 22 individual rays. The digital plate maker system further includes a toning system which provides a vertical meniscus which is essentially stationary with the electrophotographic member as the electrophotographic member is rotated past the toning station.

REFERENCES:
patent: 4124286 (1978-11-01), Barasch
patent: 4212530 (1980-07-01), Pitts, Jr.
patent: 4291341 (1981-09-01), Yajima
patent: 4291971 (1981-09-01), Anfilov et al.
patent: 4300829 (1981-11-01), Braswell et al.
patent: 4302096 (1981-11-01), Schonfeld et al.
patent: 4320955 (1982-03-01), Kay

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