Photocopying – Including fiber optics
Patent
1986-05-12
1989-01-03
Prescott, A. C.
Photocopying
Including fiber optics
355 14R, 355 55, G03G 1500, G03B 2750
Patent
active
047960540
ABSTRACT:
A color copying machine contains a scanning unit driven by a motor for applying a color scanning beam onto a manuscript, a photoconductive drum operable to rotate for being exposed to the scanning beam to form on a peripheral surface thereof a latent image of the manuscript. The color copying machine further contains a device for applying a toner to the latent image to form a toner image, and a transfer drum for holding a record sheet onto which the toner image on the photoconductive drum is transferred. A main controller calculates data representative of a speed of the motor in accordance with a magnification rate of the copy image to be formed on the record sheet to the image on the manuscript, and outputs a pulse signal whose pulse rate is proportional to the calculated speed data. The main controller outputs the pulse signal to a controller which drives the motor at a speed determined by the pulse rate of the pulse signal. Thus, the speed of the scanning unit is determined in accordance with the magnification rate.
REFERENCES:
patent: 4072412 (1978-02-01), Suda et al.
patent: 4332461 (1982-06-01), Cail et al.
patent: 4436416 (1984-03-01), Negoro et al.
patent: 4586808 (1986-05-01), Tanimoto et al.
patent: 4705386 (1987-11-01), Ogita et al.
Inoue Kenji
Maeno Satoru
Ogita Akira
Tanaka Masaaki
Fuji 'Xerox Co., Ltd.
Lau Jane
Prescott A. C.
Shinko Electric Co. Ltd.
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