Image forming apparatus having intermediary transfer member

Details Image forming apparatus having intermediary transfer member Image forming apparatus having intermediary transfer member

1997-08-04

1999-09-14

Grimley, Arthur T.

Electrophotography

Image formation

Transfer

399 66, 399308, G03G 1516

Patent

active

059535725

ABSTRACT:
An image forming apparatus includes an image bearing member for bearing an image; an intermediary transfer member onto which an image is transferred from the image bearing member at a first transfer position and from which the image thus transferred is transferred onto a transfer material at a second transfer position; a contact member provided at an image bearing side of the intermediary transfer member, the contact member being capable of forming a nip between the intermediary transfer member; a supporting member for supporting the intermediary transfer member at a position opposite from the nip; a sum of a resistance value of the contact member and a resistance value of the supporting member is not more than 1/10 of a resistance value of the intermediary transfer member; and the contact member and the supporting member are contacted to the intermediary transfer member, and when no transfer material is present at the nip, a voltage is detected while a predetermined current is applied between the contact member and the supporting member through the intermediary transfer member.

REFERENCES:
patent: 5287144 (1994-02-01), Takeda
patent: 5701566 (1997-12-01), Bisaiji et al.
patent: 5752130 (1998-05-01), Tanaka et al.
patent: 5802442 (1998-09-01), Konno et al.

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