| 摘要 |
PROBLEM TO BE SOLVED: To prevent a film member from being cut and to smoothly pull it out by preventing a toner accumulation which occurs in the folded-back part of the film member, and eliminating trouble in the act of pulling it out. SOLUTION: The toner cartridge 10 having a developing chamber 2 and a toner chamber 3 and a casing 1 housing them is equipped with a border wall 31, provided in the casing 1, which separates the developing chamber 2 and the toner chamber 3, a toner supply port 32, made in the border wall 31, which communicates with the developing chamber, a freely peelable film member 33 stuck for hermetically sealing the toner supply port, and a film member pull-out opening 13 made through the external wall of the casing 1 from outside to the developing chamber 2. The end of the film member 33 situated further from the pull-out opening of the toner supply port 32 is folded back and extended to the pull-out opening 13, and a difference in level 34 more projecting toward the developing chamber 2 than the wall face of the boarder wall 31 is provided between the toner supply part 32 and the pull-out opening 13. |
