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. 09, 1993
Filed:
Dec. 20, 1990
Kenji Hashimoto, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An automatic document feeder (ADF) for use with an electrophotographic copier, digital copier or similar image recorder for selectively feeding ordinary documents in the form of separate sheets and a continuous document in the form of computer form (CF) paper. Sprocket holes formed through the CF paper are sensed to controllably transport and stop the CF paper on the basis of the number of sensed holes. Even when the sprocket holes are partly deformed or practically lost due to breakage, the positions where they should exist are surely sensed to control the transport and stop of the CF paper. Sensors responsive to the sprocket holes do not have to be shifted in matching relation to the width of CF paper and, therefore, eliminates the need for a complicated structure.