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. 06, 2005
Filed:
Jun. 04, 2003
Nobuhiko Nakano, Nara, JP;
Mitsuhiro Hasegawa, Yamatokooriyama, JP;
Shigeyuki Wakada, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A surface of a photosensitive body is charged and exposed to light to form an electrostatic latent image that is developed with toner having the same polarity as the surface. The toner image is transferred to a transfer material. During non-image forming periods a first step of applying a first voltage having the same polarity as that of the surface of the photosensitive body and an absolute value larger than the electric image forming potential of the transfer member is performed for a first period of time. In addition, a second step of applying a second voltage having an absolute value smaller than the absolute value of the electric potential of the surface of the photosensitive body to the transfer member for a second period of time not shorter than the first period of time is performed alternately with the first step.