# US 5,705,274 A · Charging member, process for producing charging member, and process cartridge having the charging member > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,705,274 A - Document ID: US5705274A - Status: Granted - Kind: A - Application number: 08/542,140 - Filed: 1995-10-12 - Granted: 1998-01-06 - Earliest claimed: 1994-10-18 - Assignees: Canon Kabushiki Kaisha - Inventors: Hiroshi Inoue; Yoshiko Fujimura; Naoki Fuei - Web page: https://patentgrep.com/patent/US5705274A ## CPC - G03G 15/0233: {Structure, details of the charging member, e.g. chemical composition, surface properties} - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - Y10T 428/31504: Composite [nonstructural laminate] - Y10T 428/31678: Of metal - Y10T 428/31681: Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.] - Y10T 428/31692: Next to addition polymer from unsaturated monomers - Y10T 428/31707: Next to natural rubber - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A charging member has a conductive support, an elastic layer formed on the conductive support, and a tubing layer formed on the elastic layer. Fine particles are present between the tubing layer and a layer provided beneath the tubing layer is contact therewith. ## Claims ### Claim 1 A charging member comprising a conductive support, an elastic layer formed on the conductive support, and a tubing layer formed on the elastic layer; fine particles being present between said tubing layer and a layer provided beneath said tubing layer in contact therewith; wherein said charging member is for use in electrophotography. ### Claim 2 (depends on 1) The charging member according to claim 1, wherein said fine particles have an average particle diameter of 50 .mu.m or less. ### Claim 3 (depends on 2) The charging member according to claim 2, wherein said fine particles have an average particle diameter of from 0.01 .mu.m to 50 .mu.m. ### Claim 4 (depends on 1, 2, 3) The charging member according to any one of claims 1 to 3, wherein said fine particles are fine particles of a material selected from the group consisting of a resin, a solid lubricant, a magnetic material, a metal oxide, a silica and a toner. ### Claim 5 (depends on 1, 2, 3) The charging member according to any one of claims 1 to 3, wherein said charging member has the shape of a roller. ### Claim 6 (depends on 1, 2, 3) The charging member according to any one of claims 1 to 3, wherein said charging member is a charging member having been remanufactured. ### Claim 7 (depends on 1) The charging member according to claim 1, wherein said charging member is provided in contact with an electrophotographic photosensitive member and electrostatically charges the electrophotographic photosensitive member upon application of a voltage. ### Claim 8 A process for producing a charging member comprising a conductive support, an elastic layer formed on the conductive support, and a tubing layer formed on the elastic layer; said process comprising the step of; forming said tubing layer on said elastic layer by inserting to the inside of a tubing a support having at least said elastic layer, after fine particles have been made or left to adhere to at least one of the surface on which said tubing layer is formed and the inner surface of the tubing; wherein said charging member is for use in electrophotography. ### Claim 9 (depends on 8) The process according to claim 8, wherein said fine particles have an average particle diameter of 50 .mu.m or less. ### Claim 10 (depends on 9) The process according to claim 9, wherein said fine particles have an average particle diameter of from 0.01 .mu.m to 50 .mu.m. ### Claim 11 (depends on 8, 9, 10) The process according to any one of claims 8 to 10, wherein said fine particles are fine particles of a material selected from the group consisting of a resin, a solid lubricant, a magnetic material, a metal oxide, a silica and a toner. ### Claim 12 (depends on 8, 9, 10) The process according to any one of claims 8 to 10, wherein said charging member has the shape of a roller. ### Claim 13 (depends on 8, 9, 10) The process according to any one of claims 8 to 10, wherein said production process is a process for remanufacturing the charging member. ### Claim 14 (depends on 8) The process according to claim 8, wherein said charging member is provided in contact with an electrophotographic photosensitive member and electrostatically charges the electrophotographic photosensitive member upon application of a voltage. ### Claim 15 A process cartridge comprising a charging means having a charging member and an additional means selected from the group consisting of an electrophotographic photosensitive member, a developing means and a cleaning means; said charging member having an elastic layer on a conductive support and a tubing layer on the elastic layer; fine particles being present between said tubing layer and a layer provided beneath said tubing layer in contact therewith; and said charging member and said additional means being integrally supported in and detachable from the body of an electrophotographic apparatus. ### Claim 16 (depends on 15) The process cartridge according to claim 15, wherein said fine particles have an average particle diameter of 50 .mu.m or less. ### Claim 17 (depends on 16) The process cartridge according to claim 16, wherein said fine particles have an average particle diameter of from 0.01 .mu.m to 50 .mu.m. ### Claim 18 (depends on 15, 16, 17) The process cartridge according to any one of claims 15 to 17, wherein said fine particles are fine particles of a material selected from the group consisting of a resin, a solid lubricant, a magnetic material, a metal oxide, a silica and a toner. ### Claim 19 (depends on 15, 16, 17) The process cartridge according to any one of claims 15 to 17, wherein said charging member is provided in contact with the electrophotographic photosensitive member. ### Claim 20 (depends on 15, 16, 17) The process cartridge according to any one of claims 15 to 17, wherein said charging member has the shape of a roller. ### Claim 21 (depends on 15, 16, 17) The process cartridge according to any one of claims 15 to 17, wherein said charging member is a charging member having been remanufactured.