Belt cartridge in a printing apparatus

摘要

A belt cartridge in a printing apparatus, including a base board attachable to or detachable from the belt unit to be operative to face the belt unit at one surface, a support unit movably installed on the base board to be operative to selectively contact the inner surface of the photoreceptor belt, and a moving mechanism which moves the support unit toward the base board and isolates the support unit from the base board.