Process cartridge, developing cartridge and developing roller

Details Process cartridge, developing cartridge and developing roller Process cartridge, developing cartridge and developing roller

2005-12-20

2005-12-20

Grimley, Arthur T. (Department: 2852)

Electrophotography

Internal machine environment

Particle or contaminant control

C399S222000, C399S284000

Reexamination Certificate

active

06978100

ABSTRACT:
A developing cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes a developing roller, for developing an electrostatic latent image formed on an electrophotographic photosensitive member, having an elastic roller portion and a shaft portion supporting the elastic roller portion, a developer regulating member; a protecting member including a contact portion provided for contact with the elastic roller portion when the protecting member is demountably mounted between the developing roller and the developer regulating member; and a supporting portion for supporting the contact portion and provided for contact with the elastic roller portion when the protecting member is demountably mounted between the developing roller and the developer regulating member. The contact portion has a hardness which is not less than a predetermined value and not more than a hardness of the elastic roller portion.

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