Developing apparatus
US-9223252-B2 · Dec 29, 2015 · US
Developing device and image forming apparatus having magnetic poles to control the distribution of a magnetic attraction force
US8995890B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8995890-B2 |
| Application number | US-201313849881-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 25, 2013 |
| Priority date | Jul 24, 2012 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
Official abstract text for this publication.
A developing device includes a developing member including a magnet member on which plural magnetic poles including a developing main magnetic pole are magnetized in a circumferential direction and a developer holder that faces an image supporting member, receives the magnet member, and holds a developer, wherein a distribution of a magnetic attraction force in a circumferential direction has a gradient that increases toward a downstream end from an upstream end of a developing area in a developer transport direction of the developer holder, and the magnetic poles are magnetized on the magnet member so that the amount of the increase of the magnetic attraction force between the upstream end and a middle position of the developing area is larger than that between the middle position and the downstream end.
First claim
Opening claim text (preview).
What is claimed is: 1. A developing device comprising: a developing member including a magnet member on which a plurality of magnetic poles including a developing main magnetic pole are arranged and magnetized in a circumferential direction, and a cylindrical developer holder that is disposed so as to face an image supporting member, receives the magnet member, and holds to transport a developer, wherein a distribution of a magnetic attraction force, which is applied on a periph…
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Physics · mapped topic
- G03G15/0921Primary
Physics · mapped topic
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Frequently asked questions
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- What does patent US8995890B2 cover?
- A developing device includes a developing member including a magnet member on which plural magnetic poles including a developing main magnetic pole are magnetized in a circumferential direction and a developer holder that faces an image supporting member, receives the magnet member, and holds a developer, wherein a distribution of a magnetic attraction force in a circumferential direction has a…
- Who is the assignee on this patent?
- Fuji Xerox Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G03G15/0921. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).