Developer carrying member, developing assembly, image forming apparatus, and process cartridge
AssigneeCanon Kabushiki Kaisha
InventorsMasayoshi Shimamura, Yasuhide Goseki, Kenji Fujishima, Michiko Orihara, Kazunori Saiki, Mayoko Maruyama, Takuya Toyooka
Life of this patent
Estimating the term…
Abstract
A developer carrying member includes a substrate, the surface of which is covered with a conducting layer. The conducting layer contains a binder resin and conducting spherical particles dispersed therein having a number average particle diameter of from 0.3 .mu.m to 30 .mu.m and a true density of 3 g/cm.sup.3 or below.
Claims135
A developer carrying member comprising:
- a substrate;
- and
- a conductive coat layer that covers a surface of the substrate,
- wherein said conductive coat layer contains at least a binder resin and conductive spherical particles having a number average particle diameter of from 0.3 .mu.m to 30 .mu.m and a true density of 3 g/cm.sup.3 or below, dispersed in the binder resin.
A developing assembly comprising:
- a developer container holding a developer;
- and
- a developer carrying member for carrying the developer held in said developer container and for transporting the developer to a developing zone,
- wherein said developer carrying member comprises a substrate, and a conductive coat layer that covers a surface of the substrate, and wherein the conductive coat layer contains at least a binder resin and conductive spherical particles having a number average particle diameter of from 0.3 .mu.m to 30 .mu.m and a true density of 3 g/cm.sup.3 or below, dispersed in the binder resin.
An image forming apparatus comprising:
- a latent image bearing member for bearing an electrostatic latent image;
- and
- a developing assembly for developing the electrostatic latent image to form a developed image, said developing assembly comprising:
- a developer container holding a developer;
- and
- a developer carrying member for carrying the developer held in said developer container and for transporting the developer to a developing zone,
- wherein said developer carrying member comprises a substrate, and a conductive coat layer that covers a surface of the substrate, and wherein the conductive coat layer contains at least a binder resin and conductive spherical particles having a number average particle diameter of from 0.3 .mu.m to 30 .mu.m and a true density of 3 g/cm.sup.3 or below, dispersed in the binder resin.
A process cartridge detachably mountable on a main assembly of an image forming apparatus, said process cartridge comprising:
- a latent image bearing member for bearing an electrostatic latent image;
- and
- developing means for developing the electrostatic latent image, said developing means comprising;
- a developer;
- and
- a developer carrying member for carrying and transporting the developer to a developing zone,
- wherein said developer carrying member comprises a substrate, and a conductive coat layer that covers a surface of the substrate, and the conductive coat layer contains at least a binder resin and conductive spherical particles having a number average particle diameter of from 0.3 .mu.m to 30 .mu.m and a true density of 3 g/cm.sup.3 or below, dispersed in the binder resin.
Dependencies are inferred from the claim text.