Electrophotographic copying machine

Details Electrophotographic copying machine Electrophotographic copying machine

1982-03-22

1984-08-14

Truhe, J. V.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 14D, 355 14SH, 355 15, G03G 1500

Patent

active

044653603

ABSTRACT:
An electrophotographic copying machine includes a combined developing-cleaning magnetic brush element. When the copy sheet is smaller than half the size of a photosensitive drum surface, two sheets of copy are obtained by three revolutions of the photosensitive drum in a multi-copy mode. During the first revolution of the photosensitive drum, the combined developing-cleaning magnetic brush element conducts the developing operation onto a first half section of the photosensitive drum and conducts the cleaning operation onto a second half section of the photosensitive drum. During the second revolution of the photosensitive drum, the first half section is cleaned and the second half section is developed. During the third revolution of the photosensitive drum, the first and second half sections are cleaned by the combined developing-cleaning magnetic brush element.

REFERENCES:
patent: 3637306 (1972-01-01), Cooper
patent: 3647293 (1972-03-01), Queener
patent: 3976375 (1976-08-01), Kurita et al.
patent: 4140386 (1979-02-01), Satomi
patent: 4142165 (1979-02-01), Miyakawa et al.
patent: 4183655 (1980-01-01), Umahashi et al.
patent: 4185910 (1980-01-01), Nomural et al.
patent: 4264186 (1981-04-01), Fujiwara
patent: 4361922 (1982-12-01), Karal
IBM Technical Disclosure Bulletin, vol. 18, No. 7, Dec. 1975, Colglazier et al., "Paper Size Indicator."

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