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. 30, 2001
Filed:
Jan. 04, 2000
Hirofumi Sakita, Tenri, JP;
Syouichi Fujita, Kashiba, JP;
Hideji Saiko, Kitakatsuragi-gun, JP;
Mitsuru Tokuyama, Soraku-gun, JP;
Masatsugu Nakamura, Kashiba, JP;
Hiroo Naoi, Nara, JP;
Kouichi Takenouchi, Nabari, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An image-forming apparatus is provided with: a rotatable photoreceptor; a charging device for charging the surface of the photoreceptor to a predetermined electric potential. A device for corona discharging, the charging device has a control electrode for controlling the quantity of corona ions that are allowed to reach the photoreceptor. A latent image forming device for forming an electrostatic latent image on the photoreceptor that has been charged by the charging device by use of light irradiation. There is a developing device for developing the electrostatic latent image by using a developer; and a control voltage supply device for supplying a control voltage to the control electrode and for switching the control voltage to a plurality of stages from a low-voltage side to a high-voltage side until the surface electric potential of the photoreceptor has risen to a predetermined electric potential. This image-forming apparatus prevents carrier rise at the time of a rise of the photoreceptor surface electric potential.