| 摘要 |
The image forming maching coprises a housing and a process unit detachably mounted on a supporting structure within the housing. The process unit includes a toner holding chamber, a developing device, a toner removing device, a toner recovery chabmer, and a toner feed device. The developing device applies toner from the toner holding chamber onto a photosensitive material in order to develop an image formed on it. The residual toner remaining on the photosensitive material is removed. The removed toner is recovered. The toner feed device includes a transparent hollow cylindrical member connected between the toner recovery chamber and the toner holding chamber, and a toner transfer device disposed within the hollow cylindrical member. The toner is fed in the toner recovery chamber back to the toner holding chamber for reuse in the developing device.
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