The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 1990
Filed:
Jun. 19, 1989
Masayuki Shima, Sendai, JP;
Ricoh Company, Ltd., Tokyo, JP;
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.