| 摘要 |
PROBLEM TO BE SOLVED: To reduce a toner consuming amount without the occurrence of a problem such as toner scattering, image density reduction, fogging or toner scattering in an image part by effectively preventing the mixture of reverse electrifying toner or paper powder, etc., into a developing device and recycling collected toner to the developing device in an image forming device by which an image is formed by a recycle system. SOLUTION: Toner left on the surface of a photoreceptor drum after toner image transfer is collected by a cleaning device and collected toner is recycled into the developing device through a toner supplying carrier pipe which incorporates a carrier spiral in the image forming device. The device is characterized in such a way that an opening/closing possible opening port communicating with a toner discarding container is arranged in the midst of the carrier pipe, the opening part is set to be opened by a fixed timing and toner passing through the pipe is caught into the toner discarding container when the opening part is opened. |
