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:
Jul. 03, 2007
Filed:
Dec. 15, 2004
Kazunari Hagiwara, Numazu, JP;
Kouichi Okuda, Tokyo, JP;
Yasunori Chigono, Susono, JP;
Yasushi Shimizu, Shizuoka-ken, JP;
Hikaru Osada, Mishima, JP;
Shuji Moriya, Shizuoka-ken, JP;
Kazunari Hagiwara, Numazu, JP;
Kouichi Okuda, Tokyo, JP;
Yasunori Chigono, Susono, JP;
Yasushi Shimizu, Shizuoka-ken, JP;
Hikaru Osada, Mishima, JP;
Shuji Moriya, Shizuoka-ken, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes an image bearing member; a charging device for electrically charging the image bearing member; a rotatable developer carrying member for carrying a developer to develop an electrostatic image formed on the image bearing member with the developer, the developer carrying member being supplied with a developing bias voltage including an AC voltage; non-rotatable magnetic field generating device, disposed inside the developer carrying member, for magnetically attracting the developer on the developer carrying member, wherein the developer carrying member has a surface elastic layer, and the developer carrying member is press-contacted to the image bearing member, and the developer is one component magnetic toner, and a maximum value of an absolute value of the developing bias voltage |V|max and a surface potential of the image bearing member charge by the charging device is Vd(V), satisfy,||max=|