Counting system for use in a copying machine

Details Counting system for use in a copying machine Counting system for use in a copying machine

1989-02-17

1991-12-03

Braun, Fred L.

Photocopying

Contact printing

Light boxes

355209, 355326, G03G 1501, G03G 2100

Patent

active

050703633

ABSTRACT:
A copy machine includes an optical device for forming an electrostatic latent image of an original document on a photosensitive member, first and second developing apparatuses for developing the latent image on the photosensitive member and a setting system for setting a copying operation mode utilizing the first and second developing units in alternating and sequential operations during a single scanning operation of the optical device. An apparatus is provided for determining whether or not the color developer in the first and second developing units is the same and a prohibiting device prohibits the copying machine from copying through use of both developing units when the determining apparatus determines that the first and second developing units contain the same color developer.

REFERENCES:
patent: 3914043 (1975-10-01), McVeigh
patent: 4579443 (1986-04-01), Abuyama et al.
patent: 4897697 (1990-01-01), Ito et al.

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