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:
Jan. 01, 1991
Filed:
May. 22, 1990
Takane Fujino, Fujisawa, JP;
International Business Machines Corp., Armonk, NY (US);
Abstract
The invention comprises an image scan apparatus wherein a simple document feed unit is provided for feeding a document to be scanned to a predetermined position on a glass platen. The document feed unit is mechanically coupled to an image sense unit which is reciprocally moved between a home position and a scan start position. The document feed unit includes a frictional roller which is in contact with the glass platen. A leading edge of the document is inserted by an operator at a home position between a frictional roller and the glass platen. The frictional roller is mounted on a shaft via a one-way clutch or one-way bearing. The one-way clutch inhibits the rotation of the frictional roller during its movement from the home position to a scan start position. The leading portion of the document is engaged by the frictional roller, and the document is fed to a predetermined position on the glass platen as the frictional roller and the image sense unit are moved to the scan start position. The one-way clutch allows the rotation of the frictional roller during a reverse movement from the scan start position back to the home position, while the document is being scanned. During this movement, the frictional roller freely rotates over the document without moving it.