Image reading apparatus for reading a document at a speed corres

Details Image reading apparatus for reading a document at a speed corres Image reading apparatus for reading a document at a speed corres

1989-11-29

1993-01-05

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358409, 358410, 358496, H04N 104

Patent

active

051776260

ABSTRACT:
A document reading apparatus including a document reading unit for optically reading an image of a document, a document transfer unit for transferring the reading unit at a speed corresponding to the document reading density, and a pulse motor for driving the document transfer unit. The waveform of an exciting current supplied to the pulse motor is changed in accordance with the document reading density, and the pulse motor is rotated at a speed corresponding to the waveform of the exciting current.

REFERENCES:
patent: 4490664 (1984-12-01), Moriguchi
patent: 4743824 (1988-05-01), Andersson
patent: 4897734 (1990-01-01), Sato et al.
patent: 4992888 (1991-02-01), Nagashima

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