Photocopying – Including fiber optics
Patent
1987-02-06
1989-02-14
Prescott, A. C.
Photocopying
Including fiber optics
355 14D, 118657, 118658, 430122, G03G 1509
Patent
active
048049948
ABSTRACT:
A compact and simple structured electrophotographic printing apparatus having a single magnetic developer, in which an accumulation of toner particles is formed on a photosensitive member at a downstream position from the magnetic developer. The accumulation of the toner particles is formed by moving a photosensitive film and a magnetic brush in rubbing contact with the film in mutually opposite directions, or by deforming a magnetic field generated by the magnetic developer, using a magnetic piece. A recording electrode is disposed on a sleeve of the magnetic developer and facing the photosensitive film. Bias voltages, having polarities opposite to each other with respect to the photosensitive film, are respectively applied to the recording electrode and the sleeve. An optical beam is projected onto the photosensitive film in a region facing the recording electrode. Thus, with the aid of toner particles located between the recording electrode and the photosensitive film and the accumulation of the toner particles, sensitizing, developing and scavenging are carried out simultaneously, and thus a toner image is produced on the photosensitive film. For a magnetic developer having a rotatable sleeve, a specially designed recording electrode is disclosed. The photosensitve member may be in the form of a solid flat plane, a drum, or a flexible belt-like film.
REFERENCES:
patent: 4452173 (1984-06-01), Tabuchi et al.
patent: 4466728 (1984-08-01), Schlageter et al.
patent: 4466730 (1984-08-01), Jugle
patent: 4533229 (1985-08-01), Lu
patent: 4559899 (1985-12-01), Kan et al.
patent: 4637706 (1987-01-01), Hosoi et al.
Kimura Masatoshi
Nakajima Junzo
Sasaki Sachio
Wanou Masahiro
Fujitsu Limited
Prescott A. C.
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