Transfer device and image forming apparatus

Electrophotography – Image formation – Transfer

Reexamination Certificate

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Details

C399S066000, C399S315000, C399S400000

Reexamination Certificate

active

08005412

ABSTRACT:
A neutralizing mechanism is provided on at least one conveying path proximal member installed on a conveying path of a sheet material in a vicinity of a transfer position, and is grounded by using a conducting material. The neutralizing mechanism includes a neutralizing circuit that includes a resistor and a ground switch electrically connected in parallel to each other. The ground switch is turned off at least at a time of applying the transfer bias to prevent a leakage of a transfer current, and turned on for a predetermined time at a time other than the time of applying the transfer bias to earth and remove a static electricity from the conveying path proximal member.

REFERENCES:
patent: 4491407 (1985-01-01), Mitsuyama et al.
patent: 5159392 (1992-10-01), Kasahara et al.
patent: 5812920 (1998-09-01), Mizude et al.
patent: 2008/0310893 (2008-12-01), Adachi et al.
patent: 58-136070 (1983-08-01), None
patent: 5-107944 (1993-04-01), None
patent: 05-107955 (1993-04-01), None
patent: 9-40225 (1997-02-01), None
patent: 11-7200 (1999-01-01), None
patent: 2004-212634 (2004-07-01), None

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