Developing electrode contamination prevention system for electro

Details Developing electrode contamination prevention system for electro Developing electrode contamination prevention system for electro

1975-08-05

1977-05-24

Moses, Richard L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

118 7, 118DIG23, 355 14, 427 17, G03G 1510

Patent

active

040251845

ABSTRACT:
A photoconductive drum has an image portion and a non-image portion. A biasing voltage is applied to a developing electrode when the image portion of the drum is adjacent thereto. The developing electrode is grounded when the non-image portion of the drum is adjacent thereto to prevent toner particles from being attracted thereto to accumulate and contaminate the developing electrode. A low voltage is applied to the non-image portion of the drum to remove toner from the developing electrode which was attracted thereto during development of the image portion of the drum.

REFERENCES:
patent: 3892481 (1975-07-01), Shaefer et al.

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