Document reading apparatus

Details Document reading apparatus Document reading apparatus

1989-06-19

1990-11-13

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

355213, 358494, 358496, 358498, H04N 104

Patent

active

049706063

ABSTRACT:
A document reading apparatus comprises a contact type image sensor having a protection glass located at a surface where a document is to be read, first roller mechanism for supplying a document which is to be read in a document transport direction on the protection glass of the contact type image sensor, a platen roller which is rotatably supported at a position confronting the protection glass, a support mechanism for rotatably supporting the platen roller, and a restricting mechanism. The support mechanism permits a movement of the platen roller in a predetermined direction which is approximately perpendicular to a surface of the protection glass depending on a thickness of the document which is supplied between the platen roller and the protection glass by the first roller mechanism. The restricting mechanism restricts a position of the platen roller to a predetermined position when no document is inserted between the platen roller and the protection glass so that a predetermined gap is formed therebetween.

REFERENCES:
patent: 4908718 (1990-03-01), Shimada

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