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. 02, 2014
Filed:
Jan. 05, 2012
Kanji Nakayama, Toyokawa, JP;
Masayasu Haga, Toyokawa, JP;
Tomohisa Yoshida, Toyokawa, JP;
Wataru Onoda, Toyokawa, JP;
Narutaka Yoshida, Toyokawa, JP;
Noboru Ito, Kawanishi, JP;
Kanji Nakayama, Toyokawa, JP;
Masayasu Haga, Toyokawa, JP;
Tomohisa Yoshida, Toyokawa, JP;
Wataru Onoda, Toyokawa, JP;
Narutaka Yoshida, Toyokawa, JP;
Noboru Ito, Kawanishi, JP;
Konica Minolta Business Technologies, Inc., Chiyoda-Ku, Tokyo, JP;
Abstract
An image forming apparatus, wherein the packing density at a closest point where the first peripheral surface and the second peripheral surface are the closest to each other is within a range from 0.3 to 0.4; wherein a maximum magnetic flux density of a principal magnetic pole for generating the magnetic field for development is located in an upstream side from the closest point with respect to the specified direction and at a point where the packing density is equal to or greater than 0.2; and wherein a magnetic flux density of the principal magnetic pole at a point where the packing density is 0.2 in a downstream side from the closest point with respect to the specified direction is equal to or less than ½ of a magnetic flux density of the principal magnetic pole at a point where the packing density is 0.2 in the upstream side.