Electrophotography – Diagnostics – Consumable
Reexamination Certificate
2007-09-11
2007-09-11
Tran, Hoan (Department: 2852)
Electrophotography
Diagnostics
Consumable
C399S049000, C399S060000
Reexamination Certificate
active
10855981
ABSTRACT:
When the remaining toner amount within a developer is relatively large, a control target value of a toner amount is set to Ttgt1,and a lower limit value of a toner amount which can regarded proper is set to TL1. When the density of a patch image formed under a predetermined condition is smaller than a minimum guaranteed density Dma, it is determined abnormality has occurred in the apparatus. Since the characteristic of toner within the developer changes as the remaining toner amount decreases, the control target value is changed to Ttgt2and the lower limit value is set to TL2in light of this. In this fashion, regardless of whether the toner characteristic has changed, abnormality in the apparatus is detected without fail.
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Hama Takashi
Kin Hidenori
Nakazato Hiroshi
Shimura Hidetsugu
Taguchi Keiichi
Hogan & Hartson LLP
Seiko Epson Corporation
Tran Hoan
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