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:
Apr. 22, 2008
Filed:
Nov. 18, 2005
Seiko Itagaki, Hachioji, JP;
Hiroshi Akita, Hino, JP;
Isamu Miura, Ube, JP;
Abstract
There is described an image forming apparatus for forming a high-density image by using the reversal developing method and suppressing an occurrence of irregularities. The apparatus includes an image bearing member, a latent image forming device to form an electrostatic latent image, a magnetic field generating device to generate a magnetic field and a developing device to develop the electrostatic latent image so as to form a toner image on the image bearing member. At a developing region, the developer bearing member moves in a direction opposite to a moving direction of the image bearing member and the magnetic field generating device has a developing pole to form a magnetic brush for developing the electrostatic latent image. Further, an outer diameter R (mm) of the developer bearing member and a magnetic flux density Br(mT) of the developing pole fulfill the relationship of Br≧R×4.5.