Patent ID: 9316950
Filing Date: 2016-04-19
CPC Classification: G03G

Claim Text:
1. A development device to develop a latent image formed on a latent image bearer with two-component developer contained therein, the development device comprising: a partition dividing, at least partly, an interior of the development device into a supply channel and a collection channel; a developer bearer to carry developer and disposed facing the latent image bearer; a developer regulator to adjust an amount of developer carried on the developer bearer; and multiple developer conveyance members to transport developer in a longitudinal direction of the development device and circulate developer therein, the multiple developer conveyance members including first and second conveyance members disposed facing the developer bearer, the first developer conveyance member to supply developer to the developer bearer, the second developer conveyance member to transport developer collected from the developer bearer in the collecting channel, wherein the development device is operable in multiple different speed modes and performs developer amount balance adjustment in which a driving velocity of at least the multiple developer conveyance members is increased from a driving velocity in a lower-speed mode, and the development device executes the developer amount balance adjustment for a predetermined period after image development in the lower speed mode is completed and before image development in a higher speed mode is started.