Patent ID: 8086144
Filing Date: 2011-12-27
Classification: G03G

Abstract:
1. A developer cartridge configured to be detachably mounted on a member comprising a developing roller, comprising: a longitudinal accommodation chamber accommodating a developer; a tubular conveyance chamber provided along a longitudinal direction of the accommodation chamber through a partition wall to communicate with the accommodation chamber through two openings formed in the partition wall at an interval in the longitudinal direction; a first conveyance member arranged in the accommodation chamber for conveying the developer in the accommodation chamber to the conveyance chamber from one of the openings; and a second conveyance member arranged in the conveyance chamber for conveying the developer in the conveyance chamber from one of the openings toward the other opening, wherein a communication port configured to connect the conveyance chamber with an external device is formed on a wall of the conveyance chamber between projected portions of the two openings projected on the wall.