公开(公告)号：US20180335724A1

公开(公告)日：2018-11-22

申请号：US15982040

申请日：2018-05-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Jun Shirayanagi

IPC: G03G15/08

CPC classification number: G03G15/0891 ,  G03G15/0877 ,  G03G2215/0822 ,  G03G2215/0827 ,  G03G2215/083

Abstract: A feeding screw for feeding a developer includes a rotation shaft, and a helical blade provided on the rotation shaft and including a plurality of threads. The helical blade includes a first blade helically formed with a single thread on the rotation shaft, a second blade helically formed with a single thread on the rotation shaft, and a third blade helically formed with a single thread on the rotation shaft. With respect to a direction along the rotation shaft, a gap is provided between a downstream end portion of the second blade and an upstream end portion of the third blade. A volume of the second blade is not more than 75% of the first blade between an upstream end portion of the second blade and the upstream end portion of the third blade with respect to the direction.

公开(公告)号：US20180239277A1

公开(公告)日：2018-08-23

申请号：US15873130

申请日：2018-01-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Jun Shirayanagi

IPC: G03G15/08

CPC classification number: G03G15/0868 ,  G03G15/0882 ,  G03G15/0886 ,  G03G15/0889 ,  G03G2215/0692

Abstract: An image forming apparatus includes a developing device detachably mountable to an image forming apparatus; a supplying device including an accommodating portion for accommodating a developer supplied from a developer container accommodating the developer, the supplying device being effective to supply the developer accommodated in the accommodating portion into the developing device; a controller for controlling the supply of the developer from the supplying device into the developing device; a communicating portion provided in the supplying device, for fluid communication between the accommodating portion and the developing device; a seal provided at the communicating portion to hermetically confining the developer in the accommodating portion before an operation of image forming apparatus; and a removing portion for receiving a driving force from the image forming apparatus to wind the seal up to permit fluid communication between the accommodating portion and the developing device.

公开(公告)号：US20170269505A1

公开(公告)日：2017-09-21

申请号：US15460317

申请日：2017-03-16

Applicant: CANON KABUSHIKI KAISHA

Inventor： Osamu Ariizumi ,  Jun Shirayanagi

IPC: G03G15/08

CPC classification number: G03G15/0877 ,  G03G15/0893

Abstract: A developing device including a developer carrying sleeve; a first chamber; a second chamber; a partition having a first opening for relaying the developer from the first chamber into the second chamber and a second opening for relaying back, the partition partitioning between the chambers; a first feeder in the first chamber to feed the developer from the second opening toward the first opening; a second feeder the second chamber to feed the developer in the second chamber from the first opening toward the second opening; a first regulating portion above the second feeder, extended in a direction crossing with the second feeder to regulate movement of the developer fed by the second feeder; and a second regulating portion provided above the second feeder upstream of the first regulating member, extended in a direction crossing with the second feeder to regulate movement of the developer fed by second feeder.

公开(公告)号：US11199793B2

公开(公告)日：2021-12-14

申请号：US16891162

申请日：2020-06-03

Applicant: CANON KABUSHIKI KAISHA

Inventor： Jun Shirayanagi

IPC: G03G15/08

Abstract: A developing apparatus includes a developer bearing member, a first conveyance screw arranged in a first chamber to convey developer in a first direction, and a second conveyance screw arranged in a second chamber convey the developer in an opposite second direction. A toner density detector is arranged in the second chamber to detect toner density of the developer in a circulation path. The second conveyance screw includes a first blade portion having a helical shape, a second blade portion having a helical shape of a same turn direction as the first blade portion, a gap portion provided between the first and second blade portions, and a plurality of agitating portions provided in the gap portion. Each of the agitating portions has a wall portion provided to intersect a rotational axis direction of the second conveyance screw and a recessed portion having a shape in which a portion of a periphery of the wall portion is recessed.

公开(公告)号：US10409198B2

公开(公告)日：2019-09-10

申请号：US15982040

申请日：2018-05-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Jun Shirayanagi

IPC: G03G15/08

Abstract: A feeding screw for feeding a developer includes a rotation shaft, and a helical blade provided on the rotation shaft and including a plurality of threads. The helical blade includes a first blade helically formed with a single thread on the rotation shaft, a second blade helically formed with a single thread on the rotation shaft, and a third blade helically formed with a single thread on the rotation shaft. With respect to a direction along the rotation shaft, a gap is provided between a downstream end portion of the second blade and an upstream end portion of the third blade. A volume of the second blade is not more than 75% of the first blade between an upstream end portion of the second blade and the upstream end portion of the third blade with respect to the direction.

公开(公告)号：US20130121725A1

公开(公告)日：2013-05-16

申请号：US13732524

申请日：2013-01-02

Applicant: Canon Kabushiki Kaisha

Inventor： Jun Shirayanagi

IPC: G03G21/18

CPC classification number: G03G21/1839 ,  G03G21/1814 ,  G03G21/1828

Abstract: In a process cartridge detachably mountable to a main assembly of the apparatus and including a photosensitive member and a charging roller, a spacer member for spacing the charging roller from the photosensitive member during the transportation and the displaying is recessed relative to the photosensitive member. The spacer member receives a driving force from the main assembly of the apparatus, by which the spacer member is disengaged to contact the charging roller to the photosensitive member.

Abstract translation: 在可拆卸地安装到设备的主组件并且包括感光构件和充电辊的处理盒中，用于在运输和显示期间将充电辊与感光构件间隔开的间隔构件相对于感光构件凹陷。 隔离构件接受来自装置的主组件的驱动力，间隔构件通过该驱动力被分离以使充电辊与感光构件接触。