Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1979-05-03
1981-03-03
Moses, R. L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
118648, G03G 1510
Patent
active
RE0305359
ABSTRACT:
An improved developing device in electrophotographic copying apparatus in which a plurality of developing electrodes are disposed along a path of movement of a photosensitive drum surface. The electrodes are applied with voltages in a graded manner which conforms to the damping characteristic of the potential on the photosensitive surface at a developing station. The values of voltages applied can be controlled in accordance with the value of potential formed by an imaging area of the drum surface while maintaining the graded potential to thereby achieve an excellent developing effect. Further, the drum surface is provided with an unexposed and hence high potential portion which serves to remove toner which accumulates on the electrodes.
REFERENCES:
patent: 3707943 (1973-01-01), Matsumoto et al.
patent: 3778148 (1973-12-01), Fujitsuka et al.
patent: 3892481 (1975-07-01), Schaefer et al.
Kuroishi Shoji
Mochizuki Manabu
Dunne Gerard F.
Moses R. L.
Ricoh Co. Ltd.
Shoup Guy W.
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