# US 5,352,552 A · Image-bearing member and apparatus including same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,352,552 A - Document ID: US5352552A - Status: Granted - Kind: A - Application number: 07/840,532 - Filed: 1992-02-25 - Granted: 1994-10-04 - Earliest claimed: 1991-02-27 - Assignees: Canon Kabushiki Kaisha - Inventors: Akio Maruyama; Naoto Fujimura; Kiyoshi Sakai; Shin Nagahara; Noriko Ohtani; Seiko Nakano - Web page: https://patentgrep.com/patent/US5352552A ## CPC - G03G 5/14791: {Macromolecular compounds characterised by their structure, e.g. block polymers, reticulated polymers, or by their chemical properties, e.g. by molecular weight or acidity} - G03G 5/0589: {Macromolecular compounds characterised by specific side-chain substituents or end groups} - G03G 5/0592: {Macromolecular compounds characterised by their structure or by their chemical properties, e.g. block polymers, reticulated polymers, molecular weight, acidity} - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract An image-bearing member suitable for carrying an electrostatic image and/or a toner image is formed by forming a surface layer on a substrate or a photosensitive layer. The surface layer comprises a polymerized and cured product of a photoionically polymerizable compound having two or more functional groups, and shows excellent mechanical and electrical resistance as well as excellent charge-retaining characteristic. As a result, the surface layer provides an image-bearing surface suitable for electrophotography. The surface layer may be a protective layer or a photoconductive layer when it constitutes a photosensitive member. ## Claims ### Claim 1 An image-bearing member for electrophotography, comprising a surface layer gapable of repeatedly forming electrophotographic images thereon, said surface layer comprising a polymerized and cured product of a photoionically polymerizable compound having two or more functional groups. ### Claim 2 (depends on 1) An image-bearing member according to claim 1, wherein said photoionically polymerizable compound is selected from the group consisting of epoxides, vinyl ethers, vinyls having a polar group, cyclic ethers, thioxy-silane rings, and cyclic polyorganosiloxanes. ### Claim 3 (depends on 1, 2) An image-bearing member according to claim 1 or 2, wherein said surface layer constitutes a protective layer. ### Claim 4 (depends on 3) An image-bearing member according to claim 3, wherein said image-bearing member includes at least a photoconductive layer. ### Claim 5 (depends on 4) An image-bearing member according to claim 4, wherein said photoconductive layer is an organic photoconductive layer. ### Claim 6 (depends on 5) An image-bearing member according to claim 5, wherein said organic photoconductive layer has a laminate structure including a charge generation layer and a charge transport layer. ### Claim 7 (depends on 1, 2) An image-bearing member according to claim 1 or 2, wherein said surface layer constitutes an organic photoconductive layer. ### Claim 8 (depends on 7) An image-bearing member according to claim 7, wherein said organic photoconductive layer is a charge transport layer. ### Claim 9 (depends on 7) An image-bearing member according to claim 7, wherein said organic photoconductive layer is a charge generation layer. ### Claim 10 An apparatus unit, comprising: an image-bearing member for electrophotography, comprising a surface layer capable of repeatedly forming electrophotographic images thereon, said surface layer comprising a polymerized and cured product of a photoionically polymerizable compound having two or more functional groups; and at least one of a charging means, a developing means, and a cleaning means integrally supported with said image-bearing member to form a single unit, which can be connected to or released from an apparatus body as desired. ### Claim 11 (depends on 10) An apparatus according to claim 10, wherein said photoionically polymerizable compound is selected from the group consisting of epoxides, vinyl ethers, vinyls having a polar group, cyclic ethers, thioxy-silane rings, and cyclic polyorganosiloxanes. ### Claim 12 An electrophotographic apparatus, comprising: an image-bearing member for electrophotography, comprising a surface layer capable of repeatedly forming electrophotographic images thereon, said surface layer comprising a polymerized and cured product of a photoionically polymerizable compound having two or more functional groups; a means for forming a latent image; a means for developing the latent image; and a means for transferring the developed image onto a transfer-receiving member. ### Claim 13 (depends on 12) An apparatus according to claim 12, wherein said photoionically polymerizable compound is selected from the group consisting of epoxides, vinyl ethers, vinyls having a polar group, cyclic ethers, thioxy-silane rings, and cyclic polyorganosiloxanes. ### Claim 14 A facsimile apparatus, comprising: a receiving means for receiving image data from a remote terminal; and an electrophotographic apparatus, comprising an image-bearing member for electrophotography, comprising a surface layer capable of repeatedly forming electrophotographic images thereon, said surface layer comprising a polymerized and cured product of a photoionically polymerizable compound having two or more functional groups; a means for forming a latent image; a means for developing the latent image; and a means for transferring the developed image onto a transfer-receiving member. ### Claim 15 (depends on 14) A facsimile apparatus according to claim 14, wherein said photoionically polymerizable compound is selected from the group consisting of epoxides, vinyl ethers, vinyls having a polar group, cyclic ethers, thioxy-silane rings, and cyclic polyorganosiloxanes.