公开(公告)号：US20160048096A1

公开(公告)日：2016-02-18

申请号：US14822263

申请日：2015-08-10

申请人： Canon Kabushiki Kaisha

发明人： Shinji KATAGIRI ,  Shuichi Tetsuno ,  Masaru Ohno ,  Masaru Shimura

IPC分类号： G03G15/16

CPC分类号： G03G15/1665 ,  G03G15/0189 ,  G03G15/0266 ,  G03G15/161 ,  G03G15/1675

摘要： In an image forming apparatus that performs primary transfer by allowing a current to flow to an intermediate transfer belt in the circumferential direction of the belt, the image forming apparatus has a control unit that can execute a second mode in which a second current amount which is larger than a first current amount is supplied from a current supply unit to an intermediate transfer belt and a toner image is primarily transferred only from a first photosensitive body to the intermediate transfer belt. The control unit can adjust surface potentials of the first photosensitive body and a second photosensitive body, and makes the absolute value of the surface potential of the second photosensitive body less than the absolute value of the surface potential of the first photosensitive body when the second mode is executed.

摘要翻译： 在通过允许电流在带的周向上流向中间转印带来进行一次转印的图像形成装置中，图像形成装置具有可以执行第二模式的控制单元，其中第二模式是第二模式， 大于第一电流量从电流供应单元供应到中间转印带，并且调色剂图像仅主要从第一感光体传送到中间转印带。 控制单元可以调节第一感光体和第二感光体的表面电位，并且当第二感光体的第二感光体的表面电位的绝对值小于第一感光体的表面电位的绝对值时，使得第二感光体的表面电位的绝对值 被执行。

公开(公告)号：US20230359139A1

公开(公告)日：2023-11-09

申请号：US18223161

申请日：2023-07-18

申请人： CANON KABUSHIKI KAISHA

发明人： Koji AN ,  Shinji KATAGIRI

IPC分类号： G03G15/16 ,  G03G15/04 ,  G03G15/00

CPC分类号： G03G15/1675 ,  G03G15/04072 ,  G03G15/5045 ,  G03G2215/1614 ,  G03G2215/0404

摘要： An image forming apparatus includes an image bearing member, a transfer member, an acquiring portion, an applying portion, and a controller. When a transfer voltage is subjected to constant-voltage control so that the transfer voltage applied to the transfer member by the applying portion is substantially constant, in a case that the transfer voltage when a toner amount used for a toner image is a first toner amount is a first voltage, the controller controls the applying portion so that the transfer voltage is a second voltage smaller lower in absolute value than the first voltage in a case that the toner amount is a second toner amount ager greater than the first toner amount. The acquiring portion acquires toner amount information on the toner amount for each toner image transferred onto a single recording material.