Patents by Inventor Satoshi Takezawa
Satoshi Takezawa 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: 6821696Abstract: It is a toner for optical fixing which contains a binder resin, a colorant, and an infrared light absorbent, and the infrared light absorbent has a coloring opacity of 20 or less, and of phthalocyanine compound and/or naphthalocyanine compound.Type: GrantFiled: June 4, 2002Date of Patent: November 23, 2004Assignee: Fuji Xerox Co., Ltd.Inventors: Yoshimichi Katagiri, Yasushige Nakamura, Shinichi Yaoi, Tomoaki Tanaka, Seijiro Ishimaru, Satoshi Takezawa, Katsuji Ebisu, Makoto Fukuda, Hiroyuki Sasaki, Yojiro Kumagae
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Patent number: 6746808Abstract: In a color toner for forming an image, comprising at least a binder resin and a colorant, light-absorbing fine composite particles comprising core particles and at least two coating layers having different refractive indexes laminated on the surface of the core particles or other IR-absorbing compounds such as an azulene compound having a specific structure are used as an infrared absorbing compound. The color toner is used in an electrophotographic color image forming apparatus using a photofixing system for fixing a toner image.Type: GrantFiled: March 27, 2002Date of Patent: June 8, 2004Assignee: Fuji Xerox Co., Ltd.Inventors: Yasushige Nakamura, Shinichi Yaoi, Tomoaki Tanaka, Yoshimichi Katagiri, Seijiro Ishimaru, Satoshi Takezawa, Sadaaki Yoshida
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Publication number: 20040106056Abstract: This invention relates to a toner for image formation that is used in developing an electrostatic latent image. In the toner of the present invention, an addition of a polyglycerol compound allows exhibiting an effect of dispersing a colorant in a water-repellent binding resin, thereby allows obtaining uniform dispersion by one-time kneading. Furthermore, since the degree of esterification of the polyglycerol compound is made 50% or higher and the degree of polycondensation n of polyglycerol is made from 9 to 30, even when the polyglycerol compound is added, the deterioration of electrostatic charging property and the filming can be prevented.Type: ApplicationFiled: November 24, 2003Publication date: June 3, 2004Applicant: FUJI XEROX CO., LTD.Inventors: Satoshi Takezawa, Yasushige Nakamura, Yoshimichi Katagiri
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Patent number: 6661563Abstract: Provisions of a large screen, thin sheet-like display device capable of realizing usages just like paper, a sphere-like resin body made of two semispheres capable of being manufactured easily, and a microcapsule containing electrophoretic particles capable of being manufactured easily. The sheet-like display device 10 has a sheet-like display layer 12 and at least one layer 14 containing an element for activating the sheet-like display layer, the layers being integrally formed. The sphere-like resin body has first and second portions made of resins, the absolute value of a difference between both the solubility parameters &dgr;1 and &dgr;2 of the resins being |&dgr;1−&dgr;2|≧0.2. The phoretic particle-containing microcapsule has a resin shell in which phoretic particles are contained in a core. The diameter of the core is in a range from 10 &mgr;m to 200 &mgr;m and the circumferential length L of the microcapsule is in a range of (4.1×T)≦L≦(20.Type: GrantFiled: January 30, 2001Date of Patent: December 9, 2003Assignee: Fujitsu LimitedInventors: Naoyuki Hayashi, Norio Sawatari, Fumio Takei, Satoshi Takezawa, Makoto Fukuda, Mitsuo Ozaki, Toru Takahashi
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Publication number: 20030129516Abstract: In a color toner for forming an image, comprising at least a binder resin and a colorant, light-absorbing fine composite particles comprising core particles and at least two coating layers having different refractive indexes laminated on the surface of the core particles or other IR-absorbing compounds such as an azulene compound having a specific structure are used as an infrared absorbing compound. The color toner is used in an electrophotographic color image forming apparatus using a photofixing system for fixing a toner image.Type: ApplicationFiled: March 27, 2002Publication date: July 10, 2003Applicant: Fujitsu LimitedInventors: Yasushige Nakamura, Shinichi Yaoi, Tomoaki Tanaka, Yoshimichi Katagiri, Seijiro Ishimaru, Satoshi Takezawa, Sadaaki Yoshida
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Publication number: 20030057816Abstract: A substrate for electron source formation on which a plurality of electron-emitting devices are arranged, comprising a layer where SiO2 is made a main component on the substrate, wherein an etching rate of the SiO2 layer at room temperature in 0.4 wt % of hydrogen fluoride ammonium solution (NH4—HF2) is 150 nm/min or less reducing the time-dependent change of an electron emission characteristic of an electron-emitting device in low cost, sharply improving the increasing speed of a device current If and the uniformity of final arrival values of If sharply reducing the dispersion of the electron emission characteristic, and an electron source and an image-forming apparatus that each use the substrate.Type: ApplicationFiled: September 23, 2002Publication date: March 27, 2003Inventors: Shuji Yamada, Tadayasu Meguro, Satoshi Takezawa
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Patent number: 6528221Abstract: A flash fixing toner includes a binder resin, a coloring agent, a charge control agent, a wax, and an infrared ray absorbing agent. The infrared ray absorbing agent is held within the wax, so as to suppress contact between the infrared ray absorbing agent and the charge control agent.Type: GrantFiled: March 28, 2001Date of Patent: March 4, 2003Assignee: Fujitsu LimitedInventors: Satoshi Takezawa, Yasushige Nakamura, Yoshimichi Katagiri
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Publication number: 20030007239Abstract: A colored rotating granular body 21 has a surface color-coded in two different colors and electrification characteristics for each color and rotates by an effect of an electric field to display an associated color face. For producing the colored rotating granular bodies 21, a suspension 11 of granular bodies 1 each already in a colored state and functioning as a base and an emulsion 12 of a monomer 2 sill in an uncolored state are mixed, the monomer 2 is unevenly attached to a part of a surface of each of the granular bodies 1, the monomer attached to the granular bodies 1 are polymerized to obtain granular bodies 3 composed of the polymerized monomer, thereafter only the granular bodies 3 are selectively colored, and snowman-shaped complexed resin granular bodies 4 composed of the granular bodies 1 and the granular bodies 3 are integrally spheroidized.Type: ApplicationFiled: July 2, 2002Publication date: January 9, 2003Applicant: FUJITSU LIMITEDInventors: Katsura Sakamoto, Mitsuo Ozaki, Norio Sawatari, Satoshi Takezawa, Atsunori Minagawa
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Patent number: 6485876Abstract: A non-magnetic one-component developer is provided. This non-magnetic one-component developer includes toner particles and an external additive containing inorganic particles that adhere to the surface of each of the toner particles. In accordance with an emission analysis method utilizing fusion coupling plasma, the rate of free external additive that is determined by the ratio of the number of particles emitting light only from elements of the external additive to one toner particle is 9% or less by number. With such a non-magnetic one-component developer, the external additive will not be welded to the blade of a developing apparatus.Type: GrantFiled: August 2, 2000Date of Patent: November 26, 2002Assignee: Fujitsu LimitedInventors: Satoshi Takezawa, Tomoaki Tanaka
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Publication number: 20020150830Abstract: It is a toner for optical fixing which contains a binder resin, a colorant, and an infrared light absorbent, and the infrared light absorbent has a coloring opacity of 20 or less, and of phthalocyanine compound and/or naphthalocyanine compound.Type: ApplicationFiled: June 4, 2002Publication date: October 17, 2002Applicant: FUJITSU LIMITEDInventors: Yoshimichi Katagiri, Yasushige Nakamura, Shinichi Yaoi, Tomoaki Tanaka, Seijiro Ishimaru, Satoshi Takezawa, Katsuji Ebisu, Makoto Fukuda, Hiroyuki Sasaki, Yojiro Kumagae
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Patent number: 6447971Abstract: The present invention provides a toner that contains release agent, does not cause contamination in an electrophotographic apparatus, and has environmental stability and charge stability. This release agent-containing toner includes a center portion that contains low-polarity release agent and pigment, and a surface layer formed by a resin phase that covers the center portion.Type: GrantFiled: February 5, 2001Date of Patent: September 10, 2002Assignee: Fujitsu LimitedInventors: Satoshi Takezawa, Tomoaki Tanaka
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Publication number: 20020061456Abstract: A flash fixing toner includes a binder resin, a coloring agent, a charge control agent, a wax, and an infrared ray absorbing agent. The infrared ray absorbing agent is held within the wax, so as to suppress contact between the infrared ray absorbing agent and the charge control agent.Type: ApplicationFiled: March 28, 2001Publication date: May 23, 2002Applicant: FUJITSU LIMITEDInventors: Satoshi Takezawa, Yasushige Nakamura, Yoshimichi Katagiri
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Publication number: 20020012864Abstract: The present invention provides a toner that contains release agent, does not cause contamination in an electrophotographic apparatus, and has environmental stability and charge stability. This release agent-containing toner includes a center portion that contains low-polarity release agent and pigment, and a surface layer formed by a resin phase that covers the center portion.Type: ApplicationFiled: February 5, 2001Publication date: January 31, 2002Applicant: FUJITSU LIMITEDInventors: Satoshi Takezawa, Tomoaki Tanaka
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Publication number: 20010046081Abstract: Provisions of a large screen, thin sheet-like display device capable of realizing usages just like paper, a sphere-like resin body made of two semispheres capable of being manufactured easily, and a microcapsule containing electrophoretic particles capable of being manufactured easily.Type: ApplicationFiled: January 30, 2001Publication date: November 29, 2001Inventors: Naoyuki Hayashi, Norio Sawatari, Fumio Takei, Satoshi Takezawa, Makoto Fukuda, Mitsuo Ozaki, Toru Takahashi
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Patent number: 5879846Abstract: A developing agent comprises an insulative toner and a conductive carrier, and the tensile rupture stress of the insulative toner powder layer is 0.1-1 g wt/cm.sup.2. The insulative toner used is insulative magnetic toner to which hydrophobically treated inorganic particles and conductive particles have been externally added.Type: GrantFiled: June 13, 1996Date of Patent: March 9, 1999Assignee: Fujitsu LimitedInventors: Tsuneo Watanuki, Satoshi Takezawa, Makoto Fukuda, Toru Takahashi, Norio Sawatari
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Patent number: 5755045Abstract: A shoe member is formed of a polymer composition comprising (A) a composite material having a low molecular weight material retained in a medium material and (B) a polymer material. The low molecular weight material has a viscosity of up to 5.times.10.sup.5 centipoise at 100.degree. C. The difference in solubility parameter between the low molecular weight material and the medium material is up to 3.0. The weight ratio of low molecular weight material/medium material is at least 1.0. The difference in solubility parameter between the low molecular weight material and the polymer material is up to 4.0. The weight ratio of low molecular weight material/polymer material is at least 0.5. The polymer composition is enclosed in a rubbery or elastomeric cover particularly when it is used in the outsole.Type: GrantFiled: February 14, 1997Date of Patent: May 26, 1998Assignee: Bridgestone CorporationInventors: Naruhiko Mashita, Fumio Sato, Satoshi Takezawa, Shinichi Toyosawa
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Patent number: 5681649Abstract: A shoe member is formed of a polymer composition comprising (A) a composite material having a low molecular weight material retained in a medium material and (B) a polymer material. The low molecular weight material has a viscosity of up to 5.times.10.sup.5 centipoise at 100.degree. C. The difference in solubility parameter between the low molecular weight material and the medium material is up to 3.0. The weight ratio of low molecular weight material/medium material is at least 1.0. The difference in solubility parameter between the low molecular weight material and the polymer material is up to 4.0. The weight ratio of low molecular weight material/polymer material is at least 0.5. The polymer composition is enclosed in a rubbery or elastomeric cover particularly when it is used in the outsole.Type: GrantFiled: July 27, 1995Date of Patent: October 28, 1997Assignee: Bridgestone CorporationInventors: Naruhiko Mashita, Fumio Sato, Satoshi Takezawa, Shinichi Toyosawa
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Patent number: 5589313Abstract: A method for nonmagnetic monocomponent development is intended for use in an electrophotographic copying machine or electrophotographic printer and is capable of producing highly durable prints of high quality during continuous printing operations. In the nonmagnetic monocomponent development, a developer is transported by a development roller to a photoconductor drum. A Doctor blade triboelectrifies the developer and simultaneously regulates the thickness of a layer of the developer. As the developer, a toner is used, which toner is produced by coagulating minute particles having a diameter between 0.1 and 3.0 .mu.m and then heating the minute particles, thereby thermally fusing these particles.Type: GrantFiled: February 22, 1996Date of Patent: December 31, 1996Assignee: Fujitsu, Ltd.Inventors: Satoshi Takezawa, Yoshimichi Katagiri, Yasushige Nakamura, Norio Sawatari
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Patent number: 5467176Abstract: An electrostatic latent image is developed on a latent image carrier and residual toners are collected at the same time. An electrostatic latent image is formed on a rotary endless latent image carrier; developer, including magnetic toners and magnetic carriers, is supplied to a developing area for developing the latent image carrier, and a magnetic brush is formed with the developer in the developing area to thereby collect residual toners on the latent image carrier and develop the electrostatic latent image on the latent image carrier; and the developed image on the latent image carrier is transferred to a sheet.Type: GrantFiled: March 30, 1994Date of Patent: November 14, 1995Assignee: Fujitsu LimitedInventors: Tsuneo Watanuki, Yasushige Nakamura, Satoshi Takezawa, Norio Sawatari, Akira Nagahara, Sachio Sasaki, Mitsuru Sato, Shigenobu Utaka, Takefumi Takahashi, Masahiro Wanou, Masao Konishi
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Patent number: 5340867Abstract: A flame-retardant rubber composition has an oxygen index of 19.8-27.5 and comprises not more than 24% by weight of red phosphorus as a flame retardant based on the rubber composition and a nitrile group-containing elastomer as a flame-retardant polymer component as a part of rubber ingredients constituting the rubber composition. Such flame-retardant rubber compositions are very useful in applications such as industrial goods, tire and the like strongly requiring the fire preventing function.Type: GrantFiled: November 4, 1992Date of Patent: August 23, 1994Assignee: Bridgestone CorporationInventors: Kazuo Yagawa, Takatsugu Hashimoto, Junichi Yamagishi, Kazuo Hachiya, Satoshi Takezawa