Color copying machine

Details Color copying machine Color copying machine

1986-05-12

1987-11-10

Grimley, Arthur T.

Photocopying

Including fiber optics

355 14TR, 355 14SH, G03G 1501

Patent

active

047053860

ABSTRACT:
A color copying machine includes scanning device for applying illumination onto a color original to effect a scanning operation. A color separator includes a plurality of optical filters of different colors, each of the filters allowing a predetermined light component of the illumination to pass therethrough during each scanning operation so as to apply it onto a photoconductive drum charged uniformly to form an electrostatic image thereon. Color toner is applied to each of the electrostatic images during the rotation of the photoconductive drum. The toner image on the photoconductive drum is transferred to a record sheet on a transfer drum. Two sensors are provided for sensing the initiation of each scanning operation and the position of the record sheet on the transfer drum. A control circuit detects, in response to the outputs of the two sensors, start and end timings of the transferring of each of the toner images onto the record sheet. The control circuit controls the transfer drum to rotate at the same speed as the photoconductive drum during the transfer of each toner image to said record sheet, and controls the transfer drum to rotate, during a time interval between the two consecutive transfer operations, at such a speed that a leading edge of the record sheet on the transfer drum is brought into agreement with a leading edge of each toner image on the photoconductive drum.

REFERENCES:
patent: 4025182 (1977-05-01), Goel
patent: 4194829 (1980-03-01), Cavagnaro
patent: 4416534 (1983-11-01), Kluger
patent: 4537493 (1985-08-01), Russel

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