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:
Aug. 20, 2019
Filed:
Mar. 16, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Hiroshi Tomii, Kashiwa, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An image forming apparatus includes an image forming portion configured to form an image on an intermediate transfer belt, a density sensor configured to measure a density of the image formed on the intermediate transfer belt, and a printer controller. On the intermediate transfer belt, a first test image and a third test image having different densities are alternately formed at different positions in a main scanning direction. At a position adjacent to the first test image in a sub-scanning direction, a second test image having a different density from that of the first test image is formed. At a position adjacent to the third test image in the sub-scanning direction, a fourth test image having a different density from that of the third test image is formed. The printer controller generates a gradation correction table based on a result of measurement of each test image by the density sensor.