# US 5,353,094 A · Image recording apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,353,094 A - Document ID: US5353094A - Status: Granted - Kind: A - Application number: 08/059,271 - Filed: 1993-05-11 - Granted: 1994-10-04 - Earliest claimed: 1992-06-15 - Assignees: Brother Kogyo Kabushiki Kaisha - Inventors: Shigeru Kagayama - Web page: https://patentgrep.com/patent/US5353094A ## CPC - G03B 27/32: Projection printing apparatus, e.g. enlarger, copying camera - G03F 7/002: {using materials containing microcapsules; Preparing or processing such materials, e.g. by pressure; Devices or apparatus specially designed therefor} - G03G 9/093: Encapsulated toner particles - G03G 15/34: in which the powder image is formed directly on the recording material {, e.g. by using a liquid toner} - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - G03F: PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; (phototypographic composing devices B41B; photosensitive materials or processes for photographic purposes G03C; electrophotography, sensitive layers or processes therefor G03G) - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract A hydrophilic member is coated on the recording drum of an image recording apparatus which uses photosensitive microcapsule toner. The photosensitive microcapsule toner particles each have a hydrophilic wall and hydrophobic contents. When an image is developed with pressure, the wall remains on the recording drum since moisture in the air is absorbed in the hydrophilic member. The contents do not adhere to the recording drum because of its hydrophobic feature. Therefore, a clear image can always be obtained without transferring unnecessary materials onto an image receiving paper. ## Claims ### Claim 1 An image recording apparatus comprising: a toner supply supplying charged microcapsule toner particles, each particle including a microcapsule wall having a first hydrological property and flowable contents contained within said wall having a second hydrological property different from said first hydrological property; image supporting medium holding said charged microcapsule particles from said toner supply by electrostatic force, said supporting medium having a coating thereon having said first hydrological property; an exposure device for exposing said microcapsule particles according to image information; and a rupturing device rupturing said microcapsule particles after exposure to release said flowable contents, wherein upon rupture said microcapsule particle walls are attracted to said support medium due to the same first hydrological properties and said flowable contents are repulsed by said support medium due to the different first and second hydrological properties. ### Claim 2 (depends on 1) The image recording apparatus of claim 1, wherein said microcapsule particles are photosensitive and said contents are photohardening. ### Claim 3 (depends on 1) The image recording apparatus of claim 1, wherein said first hydrological property is hydrophilic. ### Claim 4 (depends on 3) The image recording apparatus of claim 3, wherein said microcapsule wall and said coating on said supporting medium are made of material having a contact angle with water of 0.degree.-90.degree.. ### Claim 5 (depends on 1) The image recording apparatus of claim 1, wherein said second hydrological property is hydrophobic. ### Claim 6 (depends on 5) The image recording apparatus of claim 5, wherein said flowable contents are made of polymerization compound and coloring material. ### Claim 7 (depends on 5) The image recording apparatus of claim 5, wherein said flowable contents are made of material having a contact angle with water of 90.degree.-180.degree.. ### Claim 8 (depends on 1) The image recording apparatus of claim 1, wherein said first hydrological property is hydrophobic. ### Claim 9 (depends on 1) The image recording apparatus of claim 1, wherein said microcapsule wall and said coating on said supporting medium are made of resin materials including a hydrophobic radical. ### Claim 10 (depends on 1) The image recording apparatus of claim 1, wherein said second hydrological property is hydrophilic. ### Claim 11 (depends on 1) The image recording apparatus of claim 1, wherein said flowable contents are made of resin material including a hydrophilic radical. ### Claim 12 (depends on 1) The image recording apparatus of claim 1, wherein said rupturing device is a pressure roller and has a surface made of material having said second hydrological property thereby attracting said flowable contents due to the same second hydrological properties. ### Claim 13 (depends on 1) The image recording apparatus of claim 1, further comprising a moisture supplying unit adjacent said supporting medium supplying water to said supporting medium. ### Claim 14 An image recording apparatus comprising: image recording means for recording an image thereon; image supporting means for supporting an image thereon for recording on said image recording means, said supporting means having a surface with microcapsule toner particles coated thereon, each said microcapsule toner particle comprising a microcapsule wall and flowable contents contained therein, said surface and said microcapsule walls having the same hydrological properties and said flowable contents having an opposite hydrological property than said surface and said walls; exposure means for forming a latent image of an original on said image supporting means by hardening selected microcapsule toner particles corresponding to an image; and pressure developing means for applying pressure to said image supporting means to rupture non-hardened microcapsule toner particles coated on said image supporting means, wherein the hardening microcapsules and the ruptured microcapsule toner walls remain on said image supporting means due to attraction between the same hydrological properties while only the flowable contents are transferred to said image recording means due to repulsion between the opposite hydrological properties. ### Claim 15 (depends on 14) The image recording apparatus of claim 14, wherein said microcapsule wall and said surface on said supporting means are hydrophilic. ### Claim 16 (depends on 14) The image recording apparatus of claim 14, wherein said microcapsule wall and said coating on said supporting medium are made of resin material having a contact angle with water of 0.degree.-90.degree.. ### Claim 17 (depends on 14) The image recording apparatus of claim 14, wherein said flowable contents are hydrophobic. ### Claim 18 (depends on 14) The image recording apparatus of claim 14, wherein said flowable contents are made of a polymerization compound and coloring material, said flowable contents having a contact angle with water of 90.degree.-180.degree.. ### Claim 19 (depends on 14) The image recording apparatus of claim 14, wherein said microcapsule wall and said coating on said supporting medium are made of hydrophobic material having a contact angle with water of 90.degree.-180.degree.. ### Claim 20 (depends on 14) The image recording apparatus of claim 14, wherein said microcapsule wall and said coating on said supporting medium are made of resin materials including a hydrophobic radical. ### Claim 21 (depends on 14) The image recording apparatus of claim 14, wherein said flowable contents are made of hydrophilic material having a contact angle with water of 0.degree.-90.degree.. ### Claim 22 (depends on 14) The image recording apparatus of claim 14, wherein said flowable contents are made of resin material including a hydrophilic radical. ### Claim 23 (depends on 14) The image recording apparatus of claim 14, wherein said pressure developing means is a pressure roller and has a surface made of material having the same hydrological property as said flowable contents. ### Claim 24 (depends on 14) The image recording apparatus of claim 14, further comprising a moisture supplying means adjacent said supporting means for supplying water to said supporting means.