公开(公告)号：US20240288801A1

公开(公告)日：2024-08-29

申请号：US18585920

申请日：2024-02-23

申请人： CANON KABUSHIKI KAISHA

发明人： IZURU TANAKA ,  MANATO KOBAYASHI ,  YUSUKE MINATO

IPC分类号： G03G15/16 ,  G03G15/00

CPC分类号： G03G15/1675 ,  G03G15/5037

摘要： An image forming apparatus includes a photosensitive member charged to a predetermined polarity, an intermediary transfer belt, a primary transfer member forming a primary transfer portion, an electrode member in contact with the inner peripheral surface of the photosensitive member on a downstream side, first and second detecting portion to detect a current flowing through or a voltage applied to the primary transfer member and the electrode member, respectively, and a control portion, during non-image formation, to execute a setting operation in which the transfer bias to be set during image formation is set. In executing the setting operation, the control portion sets the transfer bias based on a first detecting result detected by the first detecting portion while a voltage is applied to the primary transfer member and a second detecting result detected by the second detecting portion while the voltage is applied to the primary transfer member.

公开(公告)号：US20240168414A1

公开(公告)日：2024-05-23

申请号：US18512769

申请日：2023-11-17

申请人： CANON KABUSHIKI KAISHA

发明人： MANATO KOBAYASHI ,  YUSUKE MINATO ,  IZURU TANAKA ,  RYOSUKE TSURUGA

IPC分类号： G03G15/16

CPC分类号： G03G15/162

摘要： In a cross section perpendicular to a rotational axis of a first image bearing member, when a common tangential line between the first image bearing member and a second image bearing member on an intermediary transfer belt side is a rectilinear line L, a rectilinear line passing through a rotation center of the first image bearing member and a rotation center of a first transfer member is a rectilinear line P, and a rectilinear line passing through an intersection point between the rectilinear line P and the first image bearing member and perpendicular to the rectilinear line P is a rectilinear line Q, an electrode member is constituted so that the contact portion contacting an inner surface of the belt is positioned on a first image bearing member side than the rectilinear line L is and on a first transfer member side than the rectilinear line Q is.