Patent ID: 9354549
Filing Date: 2016-05-31
CPC Classification: G03G

Claim Text:
1. A developer supply container detachably mountable to a developer supplying device, said developer supply container comprising: a developer accommodating chamber capable of accommodating developer; a rotatable feeding portion configured to feed the developer in said developer accommodating chamber; a developer discharging chamber including a discharge opening for permitting discharge of the developer fed by said feeding portion; a driving force receiving portion configured to receive a rotational force for rotating said feeding portion; a pump portion capable of changing an inside volume of said developer accommodating chamber in a longitudinal direction of said developer supply container to apply a pressure at least to said discharge opening; and a driving force converting portion configured to convert the rotational force received by said driving force receiving portion into a feeding driving force for feeding the developer by an operation of said pump portion in the longitudinal direction of said developer supply container, wherein an expansion and contraction stroke of said pump portion provided by said driving force converting portion in an initial predetermined number of rotations in an initial stage is different from that in a subsequent stage after the initial stage.