Sheet thickness measuring device and image forming apparatus

Details Sheet thickness measuring device and image forming apparatus Sheet thickness measuring device and image forming apparatus

2008-09-23

2010-02-16

Punnoose, Roy (Department: 2886)

Optics: measuring and testing

Dimension

Thickness

C356S632000, C250S559280

Reexamination Certificate

active

07663769

ABSTRACT:
A sheet thickness measuring device includes: an illumination unit that outputs a light that is illuminated into a stack of sheets from a first area defined on one of faces including a top face, a bottom face, and side faces of the stack of sheets; a detection unit that detects a light amount distribution of light entered into the stack of sheets and propagated to a second area through the stack of sheets, the second area defined on one of the side faces of the stack of sheets; and a calculation unit that calculates a thickness of a sheet in the stack of sheets based on the light amount distribution detected by the detection unit.

REFERENCES:
patent: 4676646 (1987-06-01), Strand et al.
patent: 2003-226447 (2003-08-01), None
patent: 2004-277057 (2004-10-01), None
patent: 2005-104723 (2005-04-01), None

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