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    • 76. 发明授权
    • Image forming apparatus
    • 图像形成装置
    • US08532551B2
    • 2013-09-10
    • US13094028
    • 2011-04-26
    • Shuichi TetsunoKenichi OgawaMasashi TanakaTakaaki AkamatsuShogo Kan
    • Shuichi TetsunoKenichi OgawaMasashi TanakaTakaaki AkamatsuShogo Kan
    • G03G15/20
    • G03G15/2025G03G2215/00531G03G2215/2035
    • An image forming apparatus is capable of setting a cleaning mode in which a fixing portion is cleaned by a cleaning sheet while nip-conveying the cleaning sheet in a fixing nip. When the cleaning mode is set, an image forming apparatus provides a period in which a first rotatable member and a second rotatable member are rotated in a state in which a heater is controlled so that a surface temperature Th of the first rotatable member immediately after passing through the fixing nip is kept within a temperature range of Th≦Tf3, wherein Tf3 is a flow start point of a toner and so that a surface temperature Tp of the second rotatable member immediately after passing through the fixing nip is within a temperature range Tf2≦Tp≦Tf3, wherein Tf2 is a deformation end point of the toner.
    • 图像形成装置能够设置清洁模式,其中定影部分被清洁片清洁,同时在定影辊隙中夹持输送清洁片。 当设置清洁模式时,图像形成装置提供在加热器被控制的状态下使第一可旋转构件和第二可旋转构件旋转的时段,使得刚刚通过后的第一可旋转构件的表面温度Th 通过定影压区保持在Th @ Tf3的温度范围内,其中Tf3是调色剂的流动起始点,并且使得刚刚通过定影辊隙的第二可旋转构件的表面温度Tp在Tf2的温度范围内 @ Tp @ Tf3,其中Tf2是调色剂的变形终点。
    • 78. 发明申请
    • FIXING DEVICE
    • 固定装置
    • US20110236084A1
    • 2011-09-29
    • US13053572
    • 2011-03-22
    • Satoshi NishidaKenichi OgawaMasashi TanakaShuichi TetsunoShogo Kan
    • Satoshi NishidaKenichi OgawaMasashi TanakaShuichi TetsunoShogo Kan
    • G03G15/20
    • G03G15/2064G03G21/1638G03G2215/00413G03G2215/2019G03G2221/1675
    • A fixing device for fixing on a recording material a toner image formed on the recording material includes a fixing roller; a heating member for heating the fixing roller in contact with a surface of the fixing roller; and a pressing member for forming a fixing nip between itself and the fixing roller, wherein the recording material on which the toner image is formed is subjected to fixing by being nipped and conveyed in the fixing nip. When the recording material which has been jammed is removed by pulling a trailing end of the recording material in a winding jam state in which a leading end of the recording material has passed through the fixing nip to reach a contact portion between the heating member and the fixing roller, a drawing force F1 for drawing the recording material, toward an upstream side with respect to a rotational direction of the fixing roller, nipped in the fixing nip between the fixing roller in rest state and the pressing member and a drawing force F2 for drawing the recording material, toward the upstream side with respect to the rotational direction of the fixing roller, nipped between the fixing roller in the rest state and the heating member are set so that the drawing force F2 is not more than the drawing force F1 so as to prevent the fixing roller from being tightened by the recording material.
    • 用于在记录材料上固定形成在记录材料上的调色剂图像的定影装置包括定影辊; 加热构件,用于加热与定影辊的表面接触的定影辊; 以及用于在其与定影辊之间形成定影辊隙的按压构件,其中通过在定影辊隙中夹持和输送其上形成调色剂图像的记录材料进行定影。 当通过在记录材料的前端已经通过定影辊隙的牵引阻塞状态下拉动记录材料的尾端来移除已经卡住的记录材料,以到达加热构件和 定影辊,用于拉伸记录材料的拉拔力F1朝向相对于定影辊的旋转方向的上游侧夹持在夹持在静止状态的定影辊和按压构件之间的定影辊隙中,并且夹紧力F2用于 将记录材料相对于定影辊的转动方向的上游侧拉动,夹持在处于静止状态的定影辊与加热部件之间,使得拉拔力F2不大于拉拔力F1 以防止定影辊被记录材料紧固。
    • 80. 发明授权
    • Image forming apparatus with a presence or absense sensor
    • 具有存在或缺陷传感器的图像形成装置
    • US07890009B2
    • 2011-02-15
    • US12630883
    • 2009-12-04
    • Noriyuki ItoKenichi OgawaRikuo Kawakami
    • Noriyuki ItoKenichi OgawaRikuo Kawakami
    • G03G15/20
    • G03G15/2042G03G2215/00721G03G2215/00734
    • The image forming apparatus has a heat member for heating an unfixed image and is configured so that a longitudinal center of the heat member becomes a conveyance center of the recording material, the image forming apparatus including a central portion temperature detection part adjacent to the conveyance center, an end portion temperature detection part for detecting an end portion temperature of the heat member, and a width detection part for detecting a lateral width of the recording material, wherein the width detection part is disposed at a side opposite to a side at which the end portion temperature detection part is disposed with respect to the conveyance center position of the recording material. A control part controls a power supply or conveyance interval of the heat member in accordance with the presence/absence sensor, top sensor, width sensor, central portion temperature sensor, and end portion temperature sensor.
    • 图像形成装置具有用于加热未定影图像的加热构件,并且构造成使得加热构件的纵向中心成为记录材料的输送中心,图像形成装置包括邻近输送中心的中心部分温度检测部 ,用于检测加热部件的端部温度的端部温度检测部分和用于检测记录材料的横向宽度的宽度检测部分,其中宽度检测部分设置在与该部件的一侧相反的一侧, 端部温度检测部相对于记录材料的输送中心位置配置。 控制部根据有无传感器,顶传感器,宽度传感器,中央部温度传感器和端部温度传感器来控制加热部件的供电或输送间隔。