Patent ID: 7486905
Filing Date: 2009-02-03
Classification: G03G

Abstract:
1. A cartridge, comprising: a casing having a wall defining a developer accommodating portion inside the casing, a filling port being formed through the wall in fluid communication with the developer accommodating portion, developer being introduced through the filling port into the developer accommodating portion; a cylindrical wall portion formed on the wall at a circumferential edge of the filling port and protruding from the wall outside the casing, a closure member which is fitted in the cylindrical wall portion, while being in contact with the inner peripheral surface of the cylindrical wall portion, to close the filling port; and a protruding portion that is provided on at least one of the end surface and the closure member at its contact portion between the end surface and the closure member and that protrudes toward the other one of the end surface and the closure member.