公开(公告)号：US10935907B2

公开(公告)日：2021-03-02

申请号：US16876134

申请日：2020-05-18

申请人： Yusuke Ishizuka ,  Akira Fujimori ,  Hideki Kimura ,  Yutaka Takahashi ,  Hiroshi Kikuchi ,  Hiroyuki Uenishi ,  Johji Yahagi

发明人： Yusuke Ishizuka ,  Akira Fujimori ,  Hideki Kimura ,  Yutaka Takahashi ,  Hiroshi Kikuchi ,  Hiroyuki Uenishi ,  Johji Yahagi

IPC分类号： G03G15/08 ,  G03G15/095

摘要： A developer conveyance device includes a downward conveyance path in which a developer falls under gravity, a transverse conveyance path communicating with a lower end of the downward conveyance path and extending in a transverse direction intersecting with the downward conveyance path, a transport screw disposed in the transverse conveyance path, and a floating member. The transport screw is configured to rotate in a predetermined direction to transport the developer in the transverse direction. The floating member is configured to contact the transport screw rotating in the predetermined direction to float in the downward conveyance path.

公开(公告)号：US20200233365A1

公开(公告)日：2020-07-23

申请号：US16735296

申请日：2020-01-06

申请人： Hideki Kimura ,  Akira Fujimori ,  Hiroshi Kikuchi ,  Yutaka Takahashi ,  Hiroyuki Uenishi ,  Yusuke Ishizuka ,  Johji Yahagi

发明人： Hideki Kimura ,  Akira Fujimori ,  Hiroshi Kikuchi ,  Yutaka Takahashi ,  Hiroyuki Uenishi ,  Yusuke Ishizuka ,  Johji Yahagi

IPC分类号： G03G21/00

摘要： A cleaning device includes a brush roller configured to contact an image bearer while rotating to remove toner adhering to an image bearer, a bias applying device configured to apply a bias to the brush roller, and control circuitry configured to causes the bias applying device to apply a first bias in a first period from when the brush roller is new to when a cumulative travel distance or a cumulative rotation time of the brush roller reaches a predetermined value, and to apply a second bias in a second period after the first period. The first bias sends a first current through the brush roller, and the second bias sends a second current through the brush roller. The absolute value of the first current is smaller than the absolute value of the second current.