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:
Sep. 04, 2018
Filed:
Apr. 10, 2017
Atsushi Nagata, Kanagawa, JP;
Shinya Tanaka, Kanagawa, JP;
Hirokazu Ishii, Tokyo, JP;
Kenji Sugiura, Kanagawa, JP;
Takehide Mizutani, Tokyo, JP;
Keigo Nakamura, Kanagawa, JP;
Yuuji Wada, Kanagawa, JP;
Naoto Kochi, Tokyo, JP;
Atsushi Nagata, Kanagawa, JP;
Shinya Tanaka, Kanagawa, JP;
Hirokazu Ishii, Tokyo, JP;
Kenji Sugiura, Kanagawa, JP;
Takehide Mizutani, Tokyo, JP;
Keigo Nakamura, Kanagawa, JP;
Yuuji Wada, Kanagawa, JP;
Naoto Kochi, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes an image bearer, an image forming device to form a toner image on the image bearer with toner, a power source to output a bias to transfer the toner image onto a recording medium, and control circuitry. The circuitry controls the power source to decrease a peak-to-peak voltage of the bias in response to increase in at least one of temperature and humidity, when a time-averaged voltage of the bias is on a transfer side of transferring the toner to the recording medium, from a median value of maximum and minimum voltages of the bias. The circuitry controls the power source to increase the peak-to-peak voltage of the bias in response to increase in at least one of temperature and humidity, when the time-averaged voltage of the bias is on a return side of returning the toner to the image bearer, from the median value.