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    • 1. 发明授权
    • Image forming apparatus with contact/separation mechanism
    • 具有接触/分离机构的图像形成装置
    • US07239835B2
    • 2007-07-03
    • US11504034
    • 2006-08-15
    • Hiroshi ItoShinichi KamoshidaToshihiko YamazakiShigeo Fujita
    • Hiroshi ItoShinichi KamoshidaToshihiko YamazakiShigeo Fujita
    • G03G15/20
    • G03B21/00G03G15/01G03G15/16G03G21/00
    • An image forming apparatus includes a belt-shaped image carrier adapted to support a toner image: a transfer roller; a contact/separation mechanism, operable to bring the transfer roller into contact with the image carrier to transfer the toner image from the image carrier onto a recording medium and operable to separate the transfer roller from the image carrier after the toner image is transferred onto the recording medium; and a rotation applier, operable to apply a first rotation to the transfer roller in a state that the transfer roller is separated from the image carrier. The rotation applier and the transfer roller are mechanically separated from each other when the transfer roller is in contact with the image carrier. When the contact/separation mechanism brings the transfer roller into contact with the image carrier, a circumferential speed of the transfer roller is made coincident with a circumferential speed of the image carrier.
    • 图像形成装置包括适于支撑调色剂图像的带状图像载体:转印辊; 接触/分离机构,其可操作以使转印辊与图像载体接触,以将调色剂图像从图像载体转印到记录介质上,并且可操作以在将调色剂图像转印到图像载体上之后将转印辊与图像载体分离 记录介质; 以及旋转施加器,其可操作以在转印辊与图像载体分离的状态下将第一旋转施加到转印辊。 当转印辊与图像载体接触时,旋转施加器和转印辊彼此机械分离。 当接触/分离机构使转印辊与图像载体接触时,转印辊的圆周速度与图像载体的圆周速度一致。