Developing device having bearing for supporting a developing roller

A developing device, comprising:

• a container for containing developer therein;
• a developing roller for feeding out the developer from said container and for supplying the developer to an electrostatic latent image;
• a bearing member for rotatably supporting said developing roller;
• a holder member for holding said bearing member;
• a positioning member for positioning said holder member and said bearing member with respect to said container, wherein said positioning member comprises a pin-shaped member formed integrally with said container, and said holder member and said bearing member have engagement portions by which said pin-shaped member is engaged;
• and
• a securing member for securing said holder member to said container.

A process cartridge, removably mountable within an image forming apparatus, comprising:

• a frame;
• an image bearing member supported by said frame;
• a developing device supported by said frame and adapted to develop an electrostatic latent image formed on said image bearing member, said developing device comprising a container for containing developer therein, a developing roller for feeding out the developer from said container and for supplying the developer to the electrostatic latent image, a bearing member for rotatably supporting said developing roller, a holder member for holding said bearing member, a positioning member for positioning said holder member and said bearing member with respect to said container
• wherein said positioning member comprises a pin-shaped member formed integrally with said holder member, and said bearing member and said container have engagement portions by which said pin-shaped member is engaged;
• and
• a securing member for securing said holder member to said container.

A process cartridge removably mountable within an image forming apparatus, comprising:

• a frame;
• an image bearing member supported by said frame;
• a developing device supported by said frame and adapted to develop an electrostatic latent image formed on said image bearing member, said developing device comprising a container for containing developer therein, a developing roller for feeding out the developer from said container and for supplying the developer to the electrostatic latent image, a bearing member for rotatably supporting said developing roller, a holder member for holding said bearing member, a positioning member for positioning said holder member and said bearing member with respect to said container
• wherein said positioning member comprises a pin-shaped member formed integrally with said container, and said holder member and said bearing member have engagement portions by which said pin-shaped member is engaged;
• and
• a securing member for securing said holder member to said container.