Image formation device

Details Image formation device Image formation device

2011-04-26

2011-04-26

Gray, David M (Department: 2852)

Electrophotography

Control of electrophotography process

Densitometer detail

C399S049000, C399S121000

Reexamination Certificate

active

07933531

ABSTRACT:
An electrophotographic image formation device comprises an image transfer unit (including an image transfer member) attached to a main body in a detachable manner, a density detecting unit including a detector unit and thereby detecting density of a developing agent transferred to the image transfer member, a protective cover which protects the density detecting unit not detecting the density by covering the detector unit, first and second reflecting parts (differing in reflectivity) formed in a part of the protective cover facing the detector unit, and a shifting unit which places the protective cover at a first position (with the first reflecting part facing the detector unit) when the image transfer unit has been attached to the main body while placing the protective cover at a second position (with the second reflecting part facing the detector unit) when the image transfer unit has not been attached to the main body.

REFERENCES:
patent: 6321044 (2001-11-01), Tanaka
patent: 7167661 (2007-01-01), Hatakeyama et al.
patent: 2000-132050 (2000-05-01), None
patent: 2001-100597 (2001-04-01), None
patent: 2002-131997 (2002-05-01), None
patent: 2002-328571 (2002-11-01), None
patent: 2005-070676 (2005-03-01), None
patent: 2005-134726 (2005-05-01), None

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