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. 12, 2013
Filed:
Mar. 14, 2011
Tatsuhiko Okada, Saitama, JP;
Nobuyuki Satoh, Kanagawa, JP;
Masato Kobayashi, Kanagawa, JP;
Norikazu Taki, Kanagawa, JP;
Daisuke Sawada, Saitama, JP;
Daisaku Horikawa, Saitama, JP;
Tatsuhiko Okada, Saitama, JP;
Nobuyuki Satoh, Kanagawa, JP;
Masato Kobayashi, Kanagawa, JP;
Norikazu Taki, Kanagawa, JP;
Daisuke Sawada, Saitama, JP;
Daisaku Horikawa, Saitama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes a photoconductor drum, a first printer head that forms a first pattern on the photoconductor drum and has a first end part, a second printer head that forms second and third patterns on the photoconductor drum and has a second end part that overlaps the first end part in a main scanning direction, a detection sensor that detects the densities of first and second test patterns formed at an area of the photoconductor drum at which the first and second end parts overlap, the first test pattern being formed by combining the first and second patterns, the second test pattern being formed by combining the first and third patterns, and a determination part that determines a deviation direction between the first and second printer heads by comparing the densities detected by the detection sensor.