Electrophotography – Diagnostics – Consumable
Reexamination Certificate
2011-04-19
2011-04-19
Tran, Hoan (Department: 2884)
Electrophotography
Diagnostics
Consumable
Reexamination Certificate
active
07929871
ABSTRACT:
A technique is provided which enables keeping color developers of yellow, magenta and cyan in developing devices in a satisfactory state even in a circumstance where a black toner is mainly used, in an image forming apparatus which is capable of executing image quality maintenance control and the like and which carries out printing to a photoconductor, a belt and so on while stirring the developer of each color. A determination standard for determining whether the quantity of remaining developer in a developing device housing a developer of a color that is not black should be detected or not can be selected and set from plural kinds of determination standards. Information used for determination based on the set determination standard is acquired. On the basis of the set determination standard and the acquired information, the quantity of remaining developer in the developing device housing the developer of the color that is not black of the plural colors is detected.
REFERENCES:
patent: 6122459 (2000-09-01), Ogasawara
patent: 7113711 (2006-09-01), Okamura
patent: 7751755 (2010-07-01), Yamaguchi
patent: 2002/0041770 (2002-04-01), Nakazato et al.
patent: 2004/0141765 (2004-07-01), Shimura et al.
Kabushiki Kaisha Toshiba
Toshiba Tec Kabushiki Kaisha
Tran Hoan
Turocy & Watson LLP
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