Image forming apparatus

Details Image forming apparatus Image forming apparatus

2007-03-27

2007-03-27

Gray, David M. (Department: 2852)

Electrophotography

Image formation

Combined or plural functions by single component

C399S353000, C399S354000, C399S357000, C399S358000, C399S359000

Reexamination Certificate

active

11020251

ABSTRACT:
It is intended to provide an image forming apparatus capable of conducting charge adjustment of post-transfer residual toner appropriately by securing a contact area of a temporarily-collecting member and an electrode, without applying excessive deformation load to the temporarily-collecting member. There are arranged a brush roller for temporarily collecting post-transfer residual toner, and an electrode of which inwardly-curved face being in contact with the brush roller in a toner charge apparatus. Thereby, charged-in-opposite-polarity toner, out of post-transfer residual toner, is collected by the brush roller, polarity of the toner is reversed to original polarity, and then, returned to a photosensitive drum. The inner face of the electrode, i.e., a contact face of the electrode and the brush roller is formed in an inwardly-curved face. Thereby, a large contact area and light pushing force of the electrode to the brush roller can go together.

REFERENCES:
patent: 4752810 (1988-06-01), Schmidlin et al.
patent: 6215971 (2001-04-01), Sakoh et al.
patent: 10-003197 (1998-01-01), None
patent: 10-254219 (1998-09-01), None
patent: 2001-255799 (2001-09-01), None
patent: 2002-372878 (2002-12-01), None

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