Image forming apparatus

Details Image forming apparatus Image forming apparatus

1992-11-13

1993-10-12

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355214, 355246, 361225, 361230, 361235, G03G 1502, G03G 2100

Patent

active

052530175

ABSTRACT:
An image forming apparatus capable of preventing a toner from depositing on non-charged part of an image carrier just after the start of an image forming operation even when implemented with a contact reversal development system and a contact charging system. A charge power source assigned to a charging roller feeds a current great enough to prevent toner deposition on the non-charged part of the image carrier to a constant voltage generation circuit which is connected to the image carrier.

REFERENCES:
patent: 3961193 (1976-06-01), Hudson
patent: 4484812 (1984-11-01), Takayanagi
patent: 5060017 (1991-10-01), Ueda
patent: 5144368 (1992-09-01), Ohzeki et al.

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