Imaging apparatus and imaging method therefore

Details Imaging apparatus and imaging method therefore Imaging apparatus and imaging method therefore

2007-04-24

2007-04-24

Chen, Sophia S. (Department: 2852)

Electrophotography

Image formation

Transfer

C347S116000, C399S167000

Reexamination Certificate

active

10974939

ABSTRACT:
A controller of a color copier according to the invention includes a drive controller section, a pattern generation section, and a velocity information acquisition section. The drive controller section changes the phase relationship in rotation angle between a drive roller driving the transfer belt and individual photosensitive drums of a plurality of imaging sections. The pattern generation section forms registered marks on the transfer belt by using the plurality of imaging sections before and after the drive controller section changes the phase relationship. The velocity information acquisition section acquires at least one of a velocity fluctuation component of individual photosensitive drums and a velocity fluctuation component of the transfer belt in accordance with the result of sensing by a mark sensor for two registered marks formed by the pattern generation section.

REFERENCES:
patent: 6282396 (2001-08-01), Iwata et al.
patent: 6393244 (2002-05-01), Nakayasu et al.
patent: 6408157 (2002-06-01), Tanaka et al.
patent: 6771919 (2004-08-01), Koide
patent: 2005/0047834 (2005-03-01), Tomita et al.
patent: 09-062047 (1997-03-01), None

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