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    • 7. 发明授权
    • Image forming apparatus
    • 图像形成装置
    • US06965742B2
    • 2005-11-15
    • US10698529
    • 2003-11-03
    • Toshio MiyamotoMasahiko SuzumiKoji Nihonyanagi
    • Toshio MiyamotoMasahiko SuzumiKoji Nihonyanagi
    • G03G15/00G03G15/02G03G15/16G03G21/00
    • G03G15/1675
    • An image forming apparatus which can prevent the electric discharge when the trailing edge of a recording material passes a transferring position, and yet can stabilize the surface potential of a photosensitive drum. A controller changes a transfer bias voltage Vt during the supply of paper to 0 V before the trailing edge of recording paper arrives at a transferring nip part, changes it to a transfer bias voltage V0 during the non-supply of paper after the trailing edge of the recording paper has passed the transferring nip part, and changes a charging bias voltage to a charging bias voltage smaller than a normal charging bias voltage when an area on the photosensitive drum to which 0 V has been applied passes a charging nip portion. The transfer bias voltage V0 during the non-supply of paper is smaller than the transfer bias voltage Vt during the supply of paper.
    • 一种图像形成装置,当记录材料的后缘通过转印位置时,能够防止放电,并且还可以稳定感光鼓的表面电位。 在记录纸的后缘到达传送压区部分之前,控制器将纸张供给期间的转印偏压电压Vt改变为0V,在非记录纸张期间将其转换为转印偏压V 0 0 < 在记录纸的后缘通过传送夹持部分之后的纸张供应,并且当施加了0V的感光鼓上的区域时,将充电偏置电压改变为小于正常充电偏压的充电偏置电压 通过充电压区部分。 非供纸期间的转印偏压电压V 0 <0>小于供纸期间的转印偏压电压Vt。
    • 8. 发明申请
    • Image heating apparatus having heater for externally heating fixing roller
    • 图像加热装置具有用于外部加热定影辊的加热器
    • US20050169656A1
    • 2005-08-04
    • US11046872
    • 2005-02-01
    • Koji NihonyanagiToshio MiyamotoMasahiko Suzumi
    • Koji NihonyanagiToshio MiyamotoMasahiko Suzumi
    • G03G15/20G03G15/00
    • G03G15/2025
    • The image heating apparatus for heating a toner image formed on a recording material, comprising, a rotatable member; heating device for heating an outer peripheral surface of the rotatable member, the heating device including a heater for forming a heating nip portion in cooperation with the rotatable member; back-up device for forming a conveying nip portion in cooperation with the rotatable member, the conveying nip portion conveying the recording material; and control device for controlling a temperature of the heater and a rotation of the rotatable member, wherein the apparatus has a cleaning mode to remove toner from the heating device, and the control device rotates or reversely rotates the rotatable member in a condition that the heater dissipates heat in the cleaning mode. By the virtue of the present invention, it prevents stain caused by the off-set of toner the recording material in an image heating apparatus.
    • 用于加热形成在记录材料上的调色剂图像的图像加热装置,包括可旋转构件; 加热装置,用于加热可旋转构件的外周表面,加热装置包括与可旋转构件协作形成加热辊隙部分的加热器; 用于与可旋转构件协作形成输送辊隙部分的备用装置,输送夹持部分输送记录材料; 以及用于控制加热器的温度和旋转构件的旋转的控制装置,其中,该装置具有从加热装置去除调色剂的清洁模式,并且控制装置在加热器的条件下旋转或反向旋转可旋转构件 在清洁模式下散热。 借助于本发明,可以防止由图像加热装置中的记录材料的调色剂偏离造成的污染。