Operation control device for copying apparatus

Details Operation control device for copying apparatus Operation control device for copying apparatus

1975-05-19

1977-03-08

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 14, G03B 2752

Patent

active

040110125

ABSTRACT:
An electrophotographic copier having selectable magnification of the document image includes controls for preventing initiation of a copy production cycle during an operation changing optical elements from an existing magnification to a desired other magnification, and conversely for preventing initiation of a magnification change operation during a copy production cycle.

REFERENCES:
patent: 3169441 (1965-02-01), Johnson
patent: 3689149 (1972-09-01), Livingood
patent: 3779642 (1973-12-01), Ogawa et al.

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