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:
Aug. 29, 1989
Filed:
Jan. 25, 1989
Kiyotaka Shibata, Takatsuki, JP;
Kiyoshi Morimoto, Osaka, JP;
Mita Industrial Co., Ltd., Osaka, JP;
Abstract
A mechanism for preventing the feeding of more than one sheet of paper at one time comprising a document feeder having a pair of parallel shafts, one of which is a paper-supply roller shaft supporting a plurality of paper-supply rollers, and the other of which is a separation roller shaft supporting a plurality of separation rollers, wherein the distance between the shafts is slightly less than the sum of the radii of these paper-supply rollers and separation rollers, and said paper-supply rollers and said separation rollers are arranged in a zigzag manner, the outer surface of each of said paper-supply rollers being composed of a large frictional section producing much friction between the paper-supply roller and the paper and a small frictional section producing little friction between the paper-supply roller and the paper.