Image reading apparatus

Details Image reading apparatus Image reading apparatus

1995-05-22

1997-10-14

Reinhart, Mark J.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347262, 347247, B41J 247

Patent

active

056777264

ABSTRACT:
In an image reading apparatus, an optical unit goes out from a reference stop position, reads an image from a document, and returns to the reference stop position. A position sensor detects a position of the optical unit and output a trigger signal when the optical unit comes to a predetermined position. There is provided a frequency divider to divide a frequency of a pulse signal used to detect the rotations of a driving motor, a pulse width detector to detect the divided pulse width in response to the trigger signal, and a rectifier to rectify an braking amount applied onto the driving motor in accordance with the pulse width so that the optical unit is stopped at the reference stop position.

REFERENCES:
patent: 4397521 (1983-08-01), Antos et al.
patent: 4807156 (1989-02-01), Parisi
patent: 5017944 (1991-05-01), Kitamura et al.

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