| 摘要 |
PURPOSE:To provide an image forming device having the usable time of the whole filter extended as much as possible by using a winding type filter and increasing the air flow volume of a fan when the filter gets clogged so as to successively perform the function of the filter. CONSTITUTION:The winding type filter 25 is provided opposite to the fun 27 by which the sucking air flow is generated, and minute suspended matter such as toner and paper particles in the image forming device is stuck to the filter 25. Then, this device is constituted so that the air flow volume of the fun 27 is increased when the filter 25 gets clogged in accordance with the sticking. |
