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:
Apr. 25, 1989
Filed:
Apr. 29, 1988
Applicant:
Inventors:
Takeshi Honjo, Kawasaki, JP;
Naomi Takahata, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ; G03B / ; B65H / ;
U.S. Cl.
CPC ...
355 / ; 355 75 ; 271111 ; 271259 ; 271265 ;
Abstract
A document feeder for a copying machine supplies a sheet to an exposure position by transporting the sheet through the exposure position and then returning the sheet to the exposure position. Detectors on either side of the exposure position measure the time required for the sheet transport, thus identifying the sheet size exactly.