Image forming apparatus capable of forming high-quality image

Details Image forming apparatus capable of forming high-quality image Image forming apparatus capable of forming high-quality image

2007-03-05

2009-10-13

Chen, Sophia S (Department: 2852)

Electrophotography

Control of electrophotography process

Of plural processes

C399S302000

Reexamination Certificate

active

07603047

ABSTRACT:
A printer detects density of a toner pattern on an intermediate transfer belt, operates a differential value for the detection value, and compares the differential value with a threshold value. If fluctuation of detection values is great and there are detection values of which differential values exceed the threshold value, those detection values are assumed to contain noise due to abnormality of the shape on the belt, and the detection values in such a range are corrected using curve approximation. A tone correction table is updated using the corrected detection values.

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Machine translation of JP 11-133805 A dated Oct. 8, 2008.
Japanese Office Action mailed on Oct. 21, 2008 directed towards counterpart foreign application No. 2006-306823; 5 pages.
Decision to Grant Patent mailed Apr. 7, 2009, directed to counterpart JP-2006-306823; 6 pages.

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