Patent ID: 7953340

Claim:
A cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: a developing roller configured to form a developed image on an image bearing member using a developer; a developing roller driving force receiving portion configured to receive a driving force from the main assembly of the image forming apparatus for driving said developing roller, said developing roller driving force receiving portion being disposed on one side of said cartridge with respect to a longitudinal direction of said cartridge; a first electrical contact configured to receive electrical power to be supplied to said developing roller from the main assembly of the image forming apparatus, said first electrical contact being disposed on a side of said cartridge opposite from said one side with respect to the longitudinal direction of said cartridge; a memory configured to communicate with a controller provided in the main assembly of the image forming apparatus; and a second electrical contact configured to be electrically connected with said memory and disposed closer to said first electrical contact than said developing roller driving force receiving portion with respect to the longitudinal direction of said cartridge, wherein said second electrical contact is provided on a trailing side with respect to a mounting direction of said cartridge.