Image-forming apparatus containing electrophotographic...

Details Image-forming apparatus containing electrophotographic... Image-forming apparatus containing electrophotographic...

2008-07-10

2011-10-25

Royer, William J (Department: 2852)

Electrophotography

Control of electrophotography process

Of plural processes

Reexamination Certificate

active

08045872

ABSTRACT:
An image-forming apparatus includes:an optical sensor that includes a light source unit which applies light having a light-emission main wavelength λ to a peripheral face of an image-supporting member, and a light-receiving unit which receives a reflected light thereof, so as to optically detect a toner pattern formed on a peripheral face of the image-supporting member, wherein the image-supporting member has at least one thin-film layer formed on the peripheral face thereof, and the thickness of an outermost surface thin-film layer is set so as to allow a reflectance function R(d) that indicates the relationship between a reflectance R of the peripheral face of the image-supporting member to light having a light-emission main wavelength λ from the light source unit and a thickness d (nm) of the outermost surface thin-film layer of the image-supporting member to satisfy:in-line-formulae description="In-line Formulae" end="lead"?R(d)≧0.75×{Rmax(d)−Rmin(d)}+Rmin(d).in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 7515843 (2009-04-01), Bonino et al.
patent: 09-190141 (1997-07-01), None
patent: 2007-017666 (2007-01-01), None
Notification of Reasons for Refusal in JP 2007-184199 dated Jun. 9, 2009, and an English Translation thereof.

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