Developer container for use with a developer replenishing device

A developer container comprising a container body holding a developer, said container body comprising a front end, a rear end, a developer filling hole at said rear end, a front opening at said front end, and a developer dispensing outlet at the periphery of said front end in communication with said front opening;

• a rear cover covered on said developer filling hole at said container body;
• a rotary cover covered on the front opening of said container body, and a propelling member suspended in said container body and extended out of a hole at said rotary cover and rotated to propel said developer out of said container body through said developer dispensing outlet;
• wherein:
• said container body comprises a sliding groove around the periphery of said front end, a locating block raised from the periphery of said front end for positioning in a copier, and a rib raised in said sliding groove;
• said rotary cover is secured in place after installation of the developer container in a copier, enabling said container body to be rotated relative to said rotary cover between a first position where said developer dispensing outlet is closed by said rotary cover, and a second position where said developer dispensing outlet is opened from said rotary cover for letting said developer be propelled out of said container body by said propelling member, said rotary cover comprising a downwardly extended guide plate moved with said rotary cover along the sliding groove at the periphery of the front end of said container body, a downwardly extended cover flange inserted into the front opening of said container body and moved with said rotary cover between said first position and said second position to close/open said developer dispensing outlet, a rib raised from said guide plate at an inner side and moved with said guide plate into engagement with the rib at said sliding groove at said container body upon rotary motion of said rotary cover on the front end of said container body, and a positioning block raised from a top side wall for positioning in the copier.