Developing device and image forming apparatus

Patent metadata

Field	Value
Publication number	US-8965252-B2
Application number	US-201213491270-A
Country	US
Kind code	B2
Filing date	Jun 7, 2012
Priority date	Dec 22, 2011
Publication date	Feb 24, 2015
Grant date	Feb 24, 2015

Abstract

A developing device includes a first developing roller including a first transport member that transports magnetic developer by rotating while being close to a latent-image carrier rotating in one direction and a first magnet member, a second developing roller including a second transport member that transports the developer by rotating while being close to the latent-image carrier at a position on a downstream side of the first developing roller in the one direction, and a second magnet member, and a regulation member that regulates transport amounts of the developer distributed to the first and second developing rollers to required transport amounts, and opposes the developing rollers with predetermined distances therebetween. The first and second developing rollers are spaced from each other. The regulation member is movably supported in an area closer to the latent-image carrier than a closest position between the first and second developing rollers.

First claim

What is claimed is:

1. A developing device comprising:
a first developing roller including a substantially cylindrical first transport member that transports developer showing magnetism by rotating while being close to a latent-image carrier rotating in one direction, the first transport member moving in a direction opposite the one direction, and a first magnet member fixed to an inner side of the first transport member and including a plurality of magnetic poles;
a second deve…

Assignees

• Watanabe Yoichi
• Fuji Xerox Co Ltd

Inventors

• Watanabe Yoichi

Classifications

• G03G15/0812 Primary

  Physics · mapped topic

• G03G15/0921

  Physics · mapped topic