Image forming apparatus

Details Image forming apparatus Image forming apparatus

1997-07-18

1999-06-22

Brase, Sandra

Electrophotography

Control of electrophotography process

Control of transfer

399314, G03G 1516, G03G 1520

Patent

active

059151455

ABSTRACT:
An image forming apparatus including an image bearing member, a transfer member cooperating with the image bearing member to form a nip therebetween for transferring an image from the image bearing member to a transfer material in the nip, and a control system for performing constant current control of the transfer member when the transfer material is not present in the nip and for performing constant voltage control of the transfer member with a voltage based on a voltage obtained while in constant current control, during image transferring to the transfer material. When the transfer material is not present in the nip, a predetermined voltage is applied to the transfer member and current flowing through the transfer member is detected, and, when a change in the current is decreased below a predetermined value, the constant current control is started.

REFERENCES:
patent: 5034777 (1991-07-01), Ohzeki et al.
patent: 5179397 (1993-01-01), Ohzeki et al.
patent: 5303014 (1994-04-01), Yu et al.
patent: 5339144 (1994-08-01), Nakai et al.
patent: 5450180 (1995-09-01), Ohzeki et al.
patent: 5530522 (1996-06-01), Tsunemi

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