Image forming apparatus with reciprocating dispersing feature

Details Image forming apparatus with reciprocating dispersing feature Image forming apparatus with reciprocating dispersing feature

2006-06-06

2006-06-06

Grimley, Arthur T. (Department: 2852)

Electrophotography

Image formation

Combined or plural functions by single component

C399S129000

Reexamination Certificate

active

07058338

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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