| 摘要 |
A toner cartridge has a developing chamber and a toner chamber which are divided by a partition. The partition has a step on a main surface facing to the developing chamber and has a toner supplying opening for supplying toners from the toner chamber to developing chamber. A side wall is fixed to the partition to partially provide the developing chamber. The side wall has a drawing opening for drawing a sealing film which seals the toner supplying opening. The step is located between the toner supplying opening and the drawing opening. When the sealing film is drawn from the developing chamber through the drawing opening, toners on the sealing film are gathered by a bent section of the sealing film. The step forms a escape space so that the gathered toners escape from the bent section. The sealing film is smooth drawn out of the developing chamber, because the gathered toners escape from the bent section through the escape space.
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