Medium detection apparatus and medium detection method

Details Medium detection apparatus and medium detection method Medium detection apparatus and medium detection method

2007-06-19

2007-06-19

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C250S22300B, C271S258010, C101S247000

Reexamination Certificate

active

11118393

ABSTRACT:
A medium detection apparatus is provided with: a light emitting section adapted to emit light; a light receiving section adapted to detect reflected light and output an output value in accordance with an amount of the reflected light; a medium supporting section adapted to support a medium and having a diffusing section adapted to diffuse the light emitted from the light emitting section; and a controller adapted to detect an edge of the medium based on a difference between the output value of the light receiving section when the light receiving section detects light reflected from the medium and the output value of the light receiving section when the light receiving section detects light reflected from the medium supporting section.

REFERENCES:
patent: 4805893 (1989-02-01), Kusaka
patent: 5859440 (1999-01-01), Acquaviva
patent: 2002-103721 (2002-04-01), None

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