PRIMARY COLOUR CARTRIDGE, DEVELOPER SUPPLY CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING DEVICE Russian patent published in 2015 - IPC G03G15/08 

FIELD: physics, photography.

SUBSTANCE: present group of inventions relates to a primary colour cartridge, a developer source cartridge and an electrophotographic image forming device used therewith. The disclosed developer supply cartridge (9), which is detachably mounted in an electrophotographic image forming device in an installation direction, comprises: a developer holding portion (3); an opening (34) for feeding the developer from said developer holding portion; a valve portion (35) which moves between a developer feed enabled position for opening said developer feeding opening and a developer feed disabled position for closing said developer feeding opening; and a movable portion (32) which moves for interlinked movement of said valve portion from said developer feed disabled position to the developer feed enabled position, a first protrusion (31b) which continues downwards from the lower surface to a position located before said movable portion (32), relative to the installation direction; and a second protrusion (31a) which continues downwards from the lower surface to a position located after said movable portion (32) relative to the installation direction.

EFFECT: primary colour cartridge with a developer source enables installation and retrieval of the developer supply cartridge and the primary colour cartridge in the main unit of the image forming device independent of each other without loss of the developer.

30 cl, 28 dwg