Xerox Corporation

James A Landefeld

Werner F Hoppner

An electrostatographic reproducing apparatus using a removable processing cartridge containing at least one electrostatographic processing unit together with cartridge mounting means to the main frame of the reproducing apparatus is described. The mounting means comprises a pair of locating pivot pins, one on each side of the main frame and a pair of cartridge latch blocks adjacent said locating pins, one on each side of the main frame; with the cartridge mounting means attached to the cartridge comprising a pair of mounting hinge slots, one on each side of one end of said cartridge which are positioned for cooperative engagement with the pair of locating pivot pins on the main frame, and a pair of mounting pins, one on each side of one end of the cartridge adjacent the mounting hinge slots which are positioned for cooperative engagement with the pair of cartridge latch blocks on the main frame of the reproducing apparatus. The cartridge latch blocks have arcuate slots defining a stationary inner guide surface and a curved outer deflectable cantelever spring arm, the slots terminating at the lower portion in a cartridge lock for the cartridge mounting pins and wherein when the cartridge is initially inserted in the mount the cartridge mounting hinge slots rest on said main frame locating pivot pins and said cartridge mounting pins engage the upper end of said curved outer deflectable cantelever spring arm and as said cartridge is moved about said locating pivot pins, said spring arm provides an interference with said cartridge mounting pins and is deflected thereby providing a counterbalance to said cartridge as it is lowered in position.

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Dayton, OH, United States of America

James A Landefeld