Document scanning drum and flash exposure copier

Details Document scanning drum and flash exposure copier Document scanning drum and flash exposure copier

1984-03-16

1985-07-16

Askin, Laramie E.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 3R, 355 16, G03G 1504, G03G 2100

Patent

active

045292949

ABSTRACT:
An electrostatographic printing system is disclosed as having a document supporting drum and an optical system for scanning a document for exposing the same to a moving photoreceptor belt. The drum has its surface moved in synchronism with the belt by an a.c. synchronous motor and includes a control system devised to sense the relative velocities of the compared velocities of the belt and drum surfaces and to produce a correction signal for the drum motor drive.

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