Image forming apparatus featuring a developing device which...

Details Image forming apparatus featuring a developing device which... Image forming apparatus featuring a developing device which...

2007-04-03

2007-04-03

Grainger, Quana (Department: 2852)

Electrophotography

Image formation

Development

Reexamination Certificate

active

11168569

ABSTRACT:
An image forming apparatus includes a photosensitive drum, a charging roller, a transfer roller, and a toner charging brush, wherein the toner charging brush reciprocates in a longitudinal direction of the photosensitive drum. In the image forming apparatus, when a number of rotations per a unit time of the image bearing member is assumed to be “a” and a number of times of reciprocation per unit time of the toner charging brush is assumed to be “b” assuming that R=b/a, R is set to be in a range of 1/25≦R≦3. However, R=m
(m and n are integers of 5 or less) is excluded. Consequently, generation of a periodic attachment pattern appearing on the photosensitive drum is eliminated.

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patent: 5258819 (1993-11-01), Kimura et al.
patent: 2001/0055494 (2001-12-01), Katakabe et al.
patent: 11-002961 (1997-12-01), None
patent: 2000-147900 (2000-05-01), None

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