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:
Mar. 25, 2014
Filed:
Dec. 15, 2010
Arata Suzuki, Kanagawa, JP;
Nobuyuki Satoh, Kanagawa, JP;
Masato Kobayashi, Kanagawa, JP;
Yuichi Sakurada, Kanagawa, JP;
Tatsuhiko Okada, Saitama, JP;
Daisaku Horikawa, Saitama, JP;
Arata Suzuki, Kanagawa, JP;
Nobuyuki Satoh, Kanagawa, JP;
Masato Kobayashi, Kanagawa, JP;
Yuichi Sakurada, Kanagawa, JP;
Tatsuhiko Okada, Saitama, JP;
Daisaku Horikawa, Saitama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A disclosed feed control apparatus includes a feed roller; a first detection unit detecting a rotational position of the feed roller; a sensor detecting plural marks arranged on a test chart; a difference calculation unit that calculates a difference between actual and theoretical positional information of a Nth mark when the feed roller rotates one revolution; a correction feeding amount calculation unit that calculates correction feeding amounts of the marks based on the difference and actual feeding amounts of the marks; an error calculation unit that calculates errors between the correction feeding amounts and theoretical feeding amounts by matching them to the corresponding rotational positions of the feeding roller; and a feeding amount control unit that controls the feeding amount based on a relationship between the rotational positions of the feeding roller and the corresponding errors.