Medium thickness detecting apparatus

Details Medium thickness detecting apparatus Medium thickness detecting apparatus

2005-02-01

2005-02-01

Grainger, Quana (Department: 2852)

Electrophotography

Control of electrophotography process

Responsive to copy media characteristic

C399S389000

Reexamination Certificate

active

06850717

ABSTRACT:
A medium thickness detecting apparatus detects the thickness of a recording medium. A displacement section is disposed in a transport path through which a recording medium passes. When the recording medium passes the displacement section, the displacement section displaces in a direction substantially normal to the surface of a recording medium. An amplifying section amplifies a displacement of the displacement section by a predetermined factor. A thickness determining section outputs a signal representative of an amplified value of the displacement. The displacement section may be one of two rollers between which the recording medium passes, and displaces upward when the recording medium passes between the two rollers. Alternatively, the displacement section my be positioned to sit on a stage provided in the transport path such that the displacement section is pushed away from the stage when the recording medium passes between the displacement section and the surface.

REFERENCES:
patent: 4917512 (1990-04-01), Mimura et al.
patent: 5519478 (1996-05-01), Malachowski
patent: 5806992 (1998-09-01), Ju
patent: 6256459 (2001-07-01), Hasegawa et al.
patent: 61-179774 (1986-08-01), None
patent: 11-139621 (1999-05-01), None

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