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. 27, 1993
Filed:
May. 30, 1991
Takeshi Kamada, Atusgi, JP;
Masato Nakajima, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A document scanning apparatus includes an image signal part for generating a number of successive image signals from a document which is transported along a transport path between a pair of feeding rollers and a pair of ejection rollers, a first detection part for detecting a position of the document in the transport path where a document transport is disordered when a front edge of the document being transported comes in contact with the ejection rollers, a second detection part for detecting a position of the document in the transport path where the document transport is disordered when a rear edge of the document being transported separates from the feeding rollers, and a signal correction part for correcting a defective image signal when at least one of the first detection part and the second detection part detects the position of the document where the document transport is disordered, the defective image signal being corrected through a prescribed signal correction which is carried out for a number of image signals adjacent to the defective image signal which are received from the image signal part.