US 2010/0247171 A1 · ANNULAR BODY, CARTRIDGE, AND IMAGE FORMING APPARATUS

Abstract

The invention provides an annular body having a resin layer. The resin layer has a resin and particles. The particles are at least one of conductive or magnetic. A surface of the resin layer has a first region and a second region. The first region is different from the second region in at least one of the surface resistivity or the magnetic flux density. The second region has a resin region and a high density region. The resin region is provided at an outer side with respect to the high density region in the thickness direction of the resin layer and is substantially free of the particle. The high density region has a higher content of the particles comparing to the resin region and the first region. The invention further provides a cartridge having the annular body. The invention further provides an image forming apparatus having the annular body.

Claims12

Dependent claims

An annular body comprising a resin layer,

the resin layer comprising a resin and particles,
the particles being at least one of conductive or magnetic,
a surface of the resin layer comprising a first region and a second region,
the first region being different from the second region in at least one of surface resistivity or magnetic flux density,
the second region comprising a resin region and a high density region,
the resin region being provided at an outer side with respect to the high density region in the thickness direction of the resin layer and being substantially free of the particles, and
the high density region having a higher content of the particles compared to the resin region and the first region.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/614,064Filed 6 Nov 2009

Priority

JP 2009-07221924 Mar 2009

Published

30 Sep 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

G03G 15/0233
By bringing a charging member into contact with the member to be charged, e.g. roller, brush chargers: structure, details of the charging member,…
G03G 15/0808
On a donor element, e.g. belt, roller: characterised by the developer supplying means, e.g. structure of developer supply roller
G03G 15/0818
On a donor element, e.g. belt, roller: characterised by the structure of the donor member, e.g. surface properties
G03G 15/161
Using at least one intermediate support: with means for handling the intermediate support, e.g. heating, cleaning, coating with a transfer agent

Annular body, cartridge, and image forming apparatus

Life of this patent

Annular body, cartridge, and image forming apparatus

Life of this patent

Abstract

Claims12