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:
Oct. 16, 2018
Filed:
May. 16, 2017
Kenji Sugiura, Kanagawa, JP;
Naohiro Kumagai, Kanagawa, JP;
Seiichi Kogure, Kanagawa, JP;
Junpei Fujita, Kanagawa, JP;
Kazuki Yogosawa, Kanagawa, JP;
Yuuji Wada, Kanagawa, JP;
Jyunya Sakuraba, Kanagawa, JP;
Kenji Sugiura, Kanagawa, JP;
Naohiro Kumagai, Kanagawa, JP;
Seiichi Kogure, Kanagawa, JP;
Junpei Fujita, Kanagawa, JP;
Kazuki Yogosawa, Kanagawa, JP;
Yuuji Wada, Kanagawa, JP;
Jyunya Sakuraba, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes an image bearer including a first image portion to bear a first toner image, a second image portion to bear a second toner image, and a non-image portion to bear an adjustment pattern. A transferor forms a transfer nip with the image bearer. A controller controls the power source to output an image bias as a transfer bias to transfer the first toner image and the second toner image onto a first recording medium and a second recording medium, respectively, in the transfer nip when the first image portion and the second image portion pass through the transfer nip and output a non-image bias as the transfer bias when the non-image portion passes through the transfer nip. The controller performs a constant current control on the image bias and performs a constant voltage control when the image bias switches to the non-image bias.