| 摘要 |
PURPOSE:To accomplish small-sized printer and copier which can express vivid full color by the projector of an OHP by providing a means for switching a processing speed in the middle of rotation and a processing condition control means for switching a transfer condition corresponding to the switching of the processing speed. CONSTITUTION:A control unit 17 is provided with a recording material detection means 19, a fixing temperature control means 20, a counter 22, a process switching control means 21, a speed control means 23, a transfer and cleaning press-contacting control means 24, and a transfer roller voltage switching means 25. After forming a full color toner image on a photosensitive drum 2 by superposing and developing Y(yellow), M(magenta), C(cyan) and K(black) in this order, a photosensitive drum 2 is further rotated once and the processing speed is switched to be drastically lower than ordinary time at the 5th rotation so as to increase the time passing through a fixing part, thereby improving the smoothness and the transmittance of toner. Thus, the small-sized and low-priced full color printer and copier which can express the vivid full color by the projector of the OHP are obtained. |
