Patents by Inventor Koji Akioka
Koji Akioka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7862976Abstract: A liquid developer having superior fixing characteristic of toner particles to a recording medium and which is harmless to the environment, and an image forming apparatus using the liquid developer are provided. The liquid developer is comprised of an insulation liquid and toner particles dispersed in the insulation liquid, wherein the insulation liquid contains a first vegetable oil and a reaction product produced by an ester exchange reaction of a second vegetable oil and a monovalent alcohol.Type: GrantFiled: July 12, 2007Date of Patent: January 4, 2011Assignee: Seiko Epson CorporationInventors: Satoru Miura, Koji Akioka, Hiroshi Kaiho, Takashi Teshima, Ken Ikuma
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Patent number: 7756444Abstract: A liquid developer which has excellent preservability, storage stability for a long period of time, and fixing characteristic of toner particles and which is also harmless to the environment is provided. The liquid developer contains an insulation liquid and toner particles dispersed in the insulation liquid. The insulation liquid contains a saturated fatty acid and at least one component selected from a group comprising a linolenic acid component, a linoleic acid component and an oleic acid component. The liquid developer may contain an antioxidizing agent and an oxidation polymerization accelerator for accelerating an oxidation polymerization reaction of the linolenic acid component, the linoleic acid component or the oleic acid component during a fixing process.Type: GrantFiled: June 2, 2009Date of Patent: July 13, 2010Assignee: Seiko Epson CorporationInventors: Takashi Teshima, Koji Akioka
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Patent number: 7723005Abstract: A liquid developer contains an insulation liquid containing as its main component a glyceride of an unsaturated fatty acid, toner particles dispersed in the insulation liquid; and an oxidation polymerization accelerator for accelerating oxidation polymerization reaction of the glyceride during fixing process of the toner particles. The oxidation polymerization accelerator accelerates the oxidation polymerization reaction by supplying oxygen during the fixing process of the toner particles. The liquid developer may further contain an antioxidizing agent. Preferably, the oxidation polymerization accelerator is contained in the insulation liquid being encapsulated.Type: GrantFiled: March 29, 2006Date of Patent: May 25, 2010Assignee: Seiko Epson CorporationInventors: Koji Akioka, Nobuhiro Miyakawa, Takashi Teshima, Satoru Miura
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Patent number: 7608376Abstract: A method of manufacturing a liquid developer includes associating fine particles mainly containing a resin material so as to obtain associated particles, and disintegrating the associated particles in an insulation liquid so as to obtain toner particles.Type: GrantFiled: February 22, 2007Date of Patent: October 27, 2009Assignee: Seiko Epson CorporationInventors: Satoru Miura, Hiroshi Kaiho, Takashi Teshima, Koji Akioka, Ken Ikuma
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Publication number: 20090245873Abstract: A liquid developer which has excellent preservability, storage stability for a long period of time, and fixing characteristic of toner particles and which is also harmless to the environment is provided. The liquid developer contains an insulation liquid and toner particles dispersed in the insulation liquid. The insulation liquid contains a saturated fatty acid and at least one component selected from a group comprising a linolenic acid component, a linoleic acid component and an oleic acid component. The liquid developer may contain an antioxidizing agent and an oxidation polymerization accelerator for accelerating an oxidation polymerization reaction of the linolenic acid component, the linoleic acid component or the oleic acid component during a fixing process.Type: ApplicationFiled: June 2, 2009Publication date: October 1, 2009Applicant: Seiko Epson CorporationInventors: Takashi TESHIMA, Koji AKIOKA
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Patent number: 7595140Abstract: A liquid developer includes toner particles formed of a resin material and a coloring agent, and an insulation liquid in which the toner particles are dispersed, the insulation liquid containing ester-exchange oil obtained by an ester-exchange reaction of soybean oil and at least one of semidrying oil and nondrying oil. It is preferred that the insulation liquid further contains fatty acid monoester. Further, it is preferred that the amount of the fatty acid monoester contained in the insulation liquid is in the range of 5 to 50 wt %.Type: GrantFiled: February 22, 2007Date of Patent: September 29, 2009Assignee: Seiko Epson CorporationInventors: Koji Akioka, Ken Ikuma
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Patent number: 7563550Abstract: A liquid developer which has excellent preservability, storage stability for a long period of time, and fixing characteristics of toner particles and which is also harmless to the environment is provided. The liquid developer contains an insulation liquid and toner particles dispersed in the insulation liquid. The insulation liquid contains a saturated fatty acid and at least one of an eicosapentaenoic acid component and a docosahexaenoic acid component. The liquid developer may contain an antioxidizing agent and an oxidation polymerization accelerator for accelerating an oxidation polymerization reaction of the eicosapentaenoic acid component or the docosahexaenoic acid component during a fixing process. Further, an image forming apparatus for use with the liquid developer is also provided.Type: GrantFiled: August 25, 2006Date of Patent: July 21, 2009Assignee: Seiko Epson CorporationInventors: Koji Akioka, Takashi Teshima
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Patent number: 7556907Abstract: A liquid developer which has excellent preservability, storage stability for a long period of time, and fixing characteristic of toner particles and which is also harmless to the environment is provided. The liquid developer contains an insulation liquid and toner particles dispersed in the insulation liquid. The insulation liquid contains a saturated fatty acid and at least one component selected from a group comprising a linolenic acid component, a linoleic acid component and an oleic acid component. The liquid developer may contain an antioxidizing agent and an oxidation polymerization accelerator for accelerating an oxidation polymerization reaction of the linolenic acid component, the linoleic acid component or the oleic acid component during a fixing process.Type: GrantFiled: June 2, 2006Date of Patent: July 7, 2009Assignee: Seiko Epson CorporationInventors: Takashi Teshima, Koji Akioka
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Patent number: 7514145Abstract: A method for producing resin particles using a dispersion liquid in which a dispersoid mainly made of a resin material is finely dispersed in a dispersion medium, the method comprising a dispersion liquid ejecting step for ejecting the dispersion liquid in the form of droplets and a dispersion medium removing step for removing the dispersion medium from the dispersion liquid in the form of droplets, wherein a granulation prevention agent for preventing or suppressing fine particles derived from the dispersoid from being agglomerated and then granulated is applied to the dispersion liquid.Type: GrantFiled: November 28, 2005Date of Patent: April 7, 2009Assignee: Seiko Epson CorporationInventors: Koji Akioka, Toshiaki Yamagami, Hiroshi Kaiho, Ken Ikuma
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Publication number: 20080311505Abstract: A liquid developer includes a toner particle mainly composed of a resin material, and a nonvolatile insulating liquid, the resin material including an ethylene copolymer, and the insulating liquid including fatty acid triglyceride.Type: ApplicationFiled: March 26, 2008Publication date: December 18, 2008Applicant: SEIKO EPSON CORPORATIONInventor: Koji Akioka
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Publication number: 20080299480Abstract: A liquid developer includes toner particles containing mainly a resin material, and a nonvolatile insulating liquid, the toner particles containing therein a liquid constituting the insulating liquid.Type: ApplicationFiled: March 26, 2008Publication date: December 4, 2008Applicant: SEIKO EPSON CORPORATIONInventor: Koji Akioka
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Publication number: 20080299481Abstract: A liquid developer includes: toner particles containing mainly a resin material, and a nonvolatile insulating liquid, the toner particles containing a liquid having a formulation that is different from the insulating liquid, and the liquid contained in the toner particles having an aniline point that is lower than that of the insulating liquid.Type: ApplicationFiled: March 26, 2008Publication date: December 4, 2008Applicant: SEIKO EPSON CORPORATIONInventor: Koji Akioka
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Publication number: 20080199221Abstract: A liquid developer includes an insulation liquid containing a fatty acid monoester, and toner particles comprised of a polyester resin. By using the liquid developer, it is possible to provide superior fixing characteristic of toner particles to a recording medium. An image forming apparatus that can suitably use such a liquid developer is also provided.Type: ApplicationFiled: February 15, 2008Publication date: August 21, 2008Applicant: SEIKO EPSON CORPORATIONInventors: Takashi Teshima, Koji Akioka, Ken Ikuma
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Publication number: 20080199801Abstract: A liquid developer includes: an insulating liquid having dispersed therein toner particles, the insulating liquid containing a fatty acid monoester that is an ester of a fatty acid and a monohydric alcohol, and the insulating liquid having an aniline point of from 5 to 80° C.Type: ApplicationFiled: November 7, 2007Publication date: August 21, 2008Applicant: SEIKO EPSON CORPORATIONInventors: Koji AKIOKA, Takashi TESHIMA, Satoru MIURA, Shunichiro YAMANAKA, Ken IKUMA
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Publication number: 20080014526Abstract: A liquid developer having superior fixing characteristic of toner particles to a recording medium and which is harmless to the environment, and an image forming apparatus using the liquid developer are provided. The liquid developer is comprised of an insulation liquid and toner particles dispersed in the insulation liquid, wherein the insulation liquid contains a first vegetable oil and a reaction product produced by an ester exchange reaction of a second vegetable oil and a monovalent alcohol.Type: ApplicationFiled: July 12, 2007Publication date: January 17, 2008Applicant: Seiko Epson CorporationInventors: Satoru MIURA, Koji AKIOKA, Hiroshi KAIHO, Takashi TESHIMA, Ken IKUMA
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Publication number: 20080003516Abstract: 1. A liquid developer is disclosed. The liquid developer includes an insulating liquid; and toner particles composed mainly of a resin material that are dispersed in the insulating liquid, wherein the insulating liquid contains a fatty acid monoester, and the resin material has a glass transition temperature Tg of 15 to 70° C. and a softening temperature Tf of 80 to 140° C.Type: ApplicationFiled: June 21, 2007Publication date: January 3, 2008Applicant: SEIKO EPSON CORPORATIONInventors: Koji AKIOKA, Takashi TESHIMA, Satoru MIURA, Shunichiro YAMANAKA, Ken IKUMA
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Publication number: 20070248381Abstract: A liquid developer includes toner particles formed of a resin material and a coloring agent, and an insulation liquid in which the toner particles are dispersed, the insulation liquid containing ester-exchange oil obtained by an ester-exchange reaction of soybean oil and at least one of semidrying oil and nondrying oil. It is preferred that the insulation liquid further contains fatty acid monoester. Further, it is preferred that the amount of the fatty acid monoester contained in the insulation liquid is in the range of 5 to 50 wt %.Type: ApplicationFiled: February 22, 2007Publication date: October 25, 2007Applicant: SEIKO EPSON CORPORATIONInventors: Koji AKIOKA, Ken IKUMA
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Publication number: 20070202432Abstract: A liquid developer includes toner particles formed of a resin material and a coloring agent, and an insulation liquid in which the toner particles are dispersed, the insulation liquid containing ester-exchange oil obtained by an ester-exchange reaction of linseed oil and at least one of semidrying oil and nondrying oil. It is preferred that the insulation liquid further contains fatty acid monoester. Further, it is preferred that the amount of the fatty acid monoester contained in the insulation liquid is in the range of 5 to 50 wt %.Type: ApplicationFiled: February 26, 2007Publication date: August 30, 2007Applicant: SEIKO EPSON CORPORATIONInventors: Koji AKIOKA, Ken IKUMA
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Publication number: 20070202431Abstract: A method of manufacturing a liquid developer includes associating fine particles mainly containing a resin material so as to obtain associated particles, and disintegrating the associated particles in an insulation liquid so as to obtain toner particles.Type: ApplicationFiled: February 22, 2007Publication date: August 30, 2007Applicant: SEIKO EPSON CORPORATIONInventors: Satoru MIURA, Hiroshi KAIHO, Takashi TESHIMA, Koji AKIOKA, Ken IKUMA
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Patent number: 7247414Abstract: A method for producing resin particles mainly made of a resin material using a dispersion liquid in which a dispersoid containing the resin material is finely dispersed in a dispersion medium, the method comprising a dispersion medium removing step which comprises ejecting the dispersion liquid from a head portion in the form of droplets into a solidifying portion, conveying the droplets in the solidifying portion to remove the dispersion medium, and obtaining agglomerates each of which is composed of two ore more fine particles derived from the dispersoid, and a bonding step for welding and bonding the fine particles which constitute each of the agglomerates, thereby obtaining resin particles. The resin particles can be used for manufacturing a toner.Type: GrantFiled: December 13, 2004Date of Patent: July 24, 2007Assignee: Seiko Epson CorporationInventors: Satoru Miura, Koji Akioka, Ken Ikuma