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:
Dec. 04, 2012
Filed:
May. 27, 2010
Toyoka Aimoto, Osaka, JP;
Toshimasa Hamada, Osaka, JP;
Toyoka Aimoto, Osaka, JP;
Toshimasa Hamada, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A transfer device and an image forming apparatus capable of forming an image of smooth image quality with little uneven density, are provided. An alternating voltage is applied so that a first period in which a first peak-to-peak voltage Vpp() is applied and a second period in which a second peak-to-peak voltage Vpp(), lower than the first peak-to-peak voltage, is applied are alternately repeated. In the alternating voltage to be applied, a transfer side potential to shift a toner from an intermediate transfer belt to recording paper sheet and an opposite transfer side potential to shift the toner from the recording paper sheet to the intermediate transfer belt are applied so as to alternate with each other. When fdenotes a frequency of the first period and fdenotes a frequency of the second period, ffis satisfied.