公开(公告)号：US20190137903A1

公开(公告)日：2019-05-09

申请号：US16182536

申请日：2018-11-06

Applicant: SHARP KABUSHIKI KAISHA

Inventor： KATSUMI ADACHI

IPC: G03G15/02 ,  B29C47/00 ,  B29C45/14 ,  B29C45/40

Abstract: In a cleaning roller, a plurality of uneven portions are formed on a surface. A rotation shaft of the cleaning roller is inserted into a cylindrical hole of a cylindrical cleaning member in which the plurality of uneven portions are formed, and the clean member and a rotation shaft are fixed in a state where the cleaning member is twisted in a circumferential direction. The cleaning member, in which the plurality of uneven portions extending so as to twist in the circumferential direction are formed, is molded by rotating an extrusion molding die while extruding an extrusion molding material toward an extrusion molding hole of the extrusion molding die. An injection molding material with which the injection molding die is filled is solidified to mold the cleaning member and the cleaning member is stripped from the injection molding die by rotating the extrusion molding die around an axis.

公开(公告)号：US20220299907A1

公开(公告)日：2022-09-22

申请号：US17673531

申请日：2022-02-16

Applicant: SHARP KABUSHIKI KAISHA

Inventor： KATSUMI ADACHI

IPC: G03G15/02

Abstract: A charging device includes: a charging roller to charge a surface of the image carrier by rotating in contact with the image carrier; a cleaning roller to clean a surface of the charging roller by rotating in contact with the charging roller; a bearing to hold the charging roller and the cleaning roller so that a distance between an axis of the charging roller and an axis of the cleaning roller is constant; and a biaser to apply biasing force to the bearing in a direction to bring the charging roller into press contact with the image carrier, wherein the bearing has a first bearing to support the axis of the cleaning roller and a second bearing to support the axis of the charging roller, the first bearing is disposed inward from the second bearing in a roller axial direction of the cleaning roller and the charging roller.

公开(公告)号：US20190157033A1

公开(公告)日：2019-05-23

申请号：US16316026

申请日：2017-07-14

Applicant: SHARP KABUSHIKI KAISHA

Inventor： KATSUMI ADACHI ,  HIROYUKI HIRAKAWA ,  TADASHI IWAMATSU

IPC: H01J1/312 ,  H01J9/02 ,  H01J29/04

Abstract: An electron emission element (20) includes a first electrode (30a) and a second electrode (40) which are arranged facing each other, an intermediate layer (50) that is provided between the first electrode (30a) and the second electrode (40), and an insulating layer (60) that is formed with a thickness d1 on a substrate (30). A level difference between the insulating layer (60) and the first electrode (30a) is smaller than the thickness d1 of the insulating layer (60).