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:
Jun. 11, 1991
Filed:
Jul. 27, 1989
Takanori Hasegawa, Tokyo, JP;
Hideo Negishi, Tokyo, JP;
Riso Kagaku Corporation, , JP;
Abstract
A sheet feeding device is provided for taking up and feeding a plurality of sheets one by one by a selectively driven sheet feeding roller from the stack thereof positioned on a sheet feeding base to a register roller and for transporting the sheet to an image developing and processing device at a predetermined timing by the register roller; the feeding device comprising a movable sheet guide member provided between the feeding roller and the register roller which is adapted to be displaced by the curving deformation of a sheet between the feeding roller and the register roller in the direction of the growing of the curving deformation. The feeding device may further comprise a detector for sensing the displacement of the sheet guide member to determine based upon the displacement that a predetermined curvature of a sheet has been reached, and a control for stopping the rotation of the feeding roller in response to the detection by the detector so as to prevent the sheet from deforming excessively.