DEVELOPER SUPPLY DEVICE AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To decrease a developer concentration change in a configuration in which a plurality of developer supply members are driven by a single drive source.

SOLUTION: Each of the developer supply devices (1y to 1k) includes: a first developer supply member (4y); a second developer supply member (4m); a driving device system (11); a first supply detecting section (SN1y+C4A+C5A) for calculating the quantity of first developer to be supplied; a second supply detecting section (SN1m+C4B+C5B) for calculating the quantity of second developer to be supplied; a driving time distributing means (15) for distributing a drivable time (Tb) to a first driving time (tby) and a second driving time (tbm) on the basis of the quantity of the first developer and the quantity of the second developer; and a drive control means (17) for controlling the driving device system (11) such that the first developer supply member (4y) is driven in the first drive time (tby), and the second developer supply member (4m) is driven in the second drive time (tbm).

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