Photocopying – Including fiber optics
Patent
1984-12-18
1986-08-26
Prescott, A. C.
Photocopying
Including fiber optics
355 3DD, 355 3TE, 355 10, G03G 1500
Patent
active
046079408
ABSTRACT:
A reversed development electrophotographic reproduction process for developing a charge image on a photoconducting support using a single component magnetic developer provides copies with improved densities of the dark regions, better definition and less contamination of the background. This is accomplished by connecting each of the photoconductor surface, the magnetic means for transferring the magnetic development powder from a supply source to the charge image to thereby form the powder image, and the conducting support to which the powder image is transferred to at least one voltage generator via the terminal having the same polarity as that of the charge on the photoconductor surface. Thus, for a positively charged selenium alloy photoconducting surface, the photoconductor, magnetic means, and conducting support are each connected to the positive terminal of preferably a single voltage generator. Apparatus for carrying out the process is also provided.
REFERENCES:
patent: 3666458 (1972-05-01), Arneth et al.
patent: 3817615 (1974-06-01), Adachi et al.
patent: 4056314 (1977-11-01), Silverberg
patent: 4068588 (1978-01-01), Nakano et al.
patent: 4357096 (1982-11-01), Fetterman
patent: 4415254 (1983-11-01), Nishikawa
patent: 4521502 (1985-06-01), Sakai et al.
Prescott A. C.
Rhone-Poulenc Systemes
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