Linear array sensor for copy sheet registration

Details Linear array sensor for copy sheet registration Linear array sensor for copy sheet registration

1994-06-24

1996-05-14

Terrell, William E.

Sheet feeding or delivering

Feeding

With means to interrupt feeding

250223R, 340675, B65H 702

Patent

active

055160948

ABSTRACT:
An electrophotographic printing machine of the type in which a leading edge and a trailing edge of a moving sheet are detected. The improvement includes an elongated light source that is of a length greater than that of an irregularity on the moving sheet. The elongated light source extends in a direction substantially parallel to the direction of the moving sheet. A plurality of sensors are arranged in an array and are movably mounted on a support which is extended in a direction substantially parallel to the elongated light source. The elongated light source is movably mounted to another support, so as to position the light source relative to the array of sensors. A lens, interposed between the light source and the sensor array focuses light rays emitted from the light source on to the sensors. The sensors are in a receiving relationship with the light source. The elongated light source and the array of sensors define a passageway through which the moving sheet passes.

REFERENCES:
patent: T858020 (1969-01-01), Leana
patent: 4077620 (1978-03-01), Frank et al.
patent: 4475156 (1984-10-01), Federico et al.
patent: 4691912 (1987-09-01), Gillmann
patent: 4874958 (1989-10-01), Sampath et al.
patent: 5321255 (1994-06-01), Kakinami et al.

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