Process unit cartridge for an electrophotographic apparatus

A structure of a cartridge for use with an electrophotographic apparatus having a photoconductive element, a charger for charging a surface of said photoconductive element, a writing unit for writing an image on said charged surface of said photoconductive element to form an electrostatic latent image, a developing unit for developing said latent image to form a visible image by a developer which is discharged through an opening formed on a developer container, an image transferring unit for transferring said visible image to a paper sheet, and a cleaning unit for cleaning said surface of said photoconductive element after the image transfer, said cartridge structure comprising:

• a main body accommodating at least said cleaning unit and being held in a body of said electrophotographic apparatus in such a manner as to be rotatable between a replaceable position and a set position about a fulcrum provided at a side of said main body of said cartridge where said cleaning unit is positioned;
• and
• retaining means provided in said main body of said cartridge for movably mounting said developer container on said cartridge;
• said developer container being movable between an open position at which said opening of said developer container is uncovered so that the developer is supplied from said developer container to said developing unit and a closed position at which said opening of said developer container is covered so that said developer is prevented from being discharged from said developer container;
• said developer container is moved to said open position when said main body of said cartridge is held in said set position;
• said developer container is locked in said closed position when said main body of said cartridge is held in said replaceable position while said developer container is unlocked when said main body of said cartridge is held in said set position.