Image forming apparatus and method using density test...

Details Image forming apparatus and method using density test... Image forming apparatus and method using density test...

2008-12-04

2011-12-13

Rogers, Scott A (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003210, C358S003230, C358S504000, C358S521000, C358S523000, C358S300000, C347S118000, C347S131000, C399S009000, C399S046000, C399S049000, C399S072000

Reexamination Certificate

active

08077351

ABSTRACT:
An image forming apparatus that forms a color image includes: a sensor that detects a density of an image formed on the transfer body; a density adjusting unit that forms a density test pattern on a transfer body and that adjusts process parameters such that a density of the density test pattern on the transfer body falls within a predetermined range of a reference density; and a gradation adjusting unit that forms a gradation test pattern on the transfer body and updates the gradation correction data such that a density for every gradation of the gradation test pattern on the transfer body falls within a predetermined range of a reference gradation density acquired and stored beforehand. The gradation adjusting unit updates the gradation correction data subsequently after the density adjusting unit adjusts the density of the density test pattern.

REFERENCES:
patent: 6147698 (2000-11-01), Zable et al.
patent: 7349124 (2008-03-01), Zuber
patent: 7747182 (2010-06-01), Kato et al.
patent: 7809291 (2010-10-01), Takeuchi et al.
patent: 7911645 (2011-03-01), Sagimori

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