Patent ID: 8150298
Filing Date: 2012-04-03
Classification: G03G

Abstract:
1. A developer cartridge detachably attached to an image forming unit main body, comprising: a developer storage portion for retaining developer; an opening portion formed in the developer storage portion for discharging developer from the storage portion to the image forming unit main body; a shutter member for opening and closing the opening portion; a first protrusion portion disposed on at least one of side surfaces of the developer storage portion in a longitudinal direction thereof for engaging a first groove, portion formed in the image forming unit main body, said first protrusion portion extending outwardly in the longitudinal direction; and a second protrusion portion disposed on the at least one of the side surfaces of the developer storage portion for engaging a second groove portion formed in the image forming unit main body, said second protrusion portion extending from a bottom of the developer storage portion in a direction substantially perpendicular to the longitudinal direction, wherein said first protrusion portion and said second protrusion portion are disposed on both of the side surfaces of the developer storage portion.