Patents Assigned to Noritake Co., Ltd.
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Patent number: 6796891Abstract: A grinding wheel comprising an outer annular grinding portion, and an inner core portion which is located radially inwardly of the annular grinding portion to support the annular grinding portion and which is formed of a composition including as a major component a thermoplastic resin having a specific tensile strength of at least 12 MPa. The grinding wheel is manufactured in a process including a step of crushing the core portion of the used grinding wheel into pellets to be reclaimed as a material for the core portion, a step of preparing a composition for the core portion, which includes a mass of the pellets and a fresh thermoplastic resin having a specific tensile strength of at least 12 MPa, and a step of forming the core portion by using the composition in a molten state. The process may further include a step of reclaiming the grinding portion of the used grinding wheel.Type: GrantFiled: July 29, 2002Date of Patent: September 28, 2004Assignee: Noritake Co., Ltd.Inventor: Yoshiharu Terada
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Patent number: 6755728Abstract: An abrasive film for polishing a workpiece, including: (a) a substrate; (b) a binder; (c) a multiplicity of abrasive grains which are fixed to a surface of the substrate by the binder; and (d) a water-soluble inorganic compound or a water-soluble organic acid alkali metal salt which is added to the binder. The water-soluble inorganic compound preferably consists of a weak-alkali metal salt or a weak-acid metal salt. The water-soluble organic acid alkali metal salt preferably consists of an anionic surface-active agent or a carboxylic acid alkali metal salt.Type: GrantFiled: March 26, 2002Date of Patent: June 29, 2004Assignee: Noritake Co., Ltd.Inventor: Etsuo Sugiura
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Patent number: 6641473Abstract: A grinding wheel which is to be rotated about its axis for grinding a workpiece, including: (a) a base disk; and (b) a plurality of abrasive segment chips which are fixed to the base disk such that the abrasive segment chips are arranged on a circle having a center at an axis of the base disk, and which have respective circumferential lengths as measured in a circumferential direction of the base circle, wherein the plurality of abrasive segment chips includes at least two abrasive segment chips having the respective circumferential lengths which are different from each other, and wherein the abrasive segment chips are arranged with substantially no gap between each pair of the abrasive segment chips which are contiguous to each other in the circumferential direction.Type: GrantFiled: February 25, 2002Date of Patent: November 4, 2003Assignee: Noritake Co., Ltd.Inventors: Toshimichi Nakagawa, Koji Ogawa, Kazumasa Yoshida
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Patent number: 6624566Abstract: A vacuum fluorescent display includes a front glass member, substrate, control electrode, plate-like field emission type electron-emitting source, mesh-like electron extracting electrode, and phosphor film. The front glass member has light transmission properties at least partly, and the substrate opposes the front glass member through a vacuum space. The control electrode is formed on an inner surface of the substrate. The plate-like field emission type electron-emitting source with a plurality of through holes is arranged in the vacuum space to be spaced apart from the control electrode. The mesh-like electron extracting electrode is formed between the field emission type electron-emitting source and the front glass member to be spaced apart from the field emission type electron-emitting source. The phosphor film is formed inside the front glass member.Type: GrantFiled: August 28, 2001Date of Patent: September 23, 2003Assignees: Ise Electronics Corporation, Noritake Co., Ltd.Inventors: Sashiro Uemura, Junko Yotani, Takeshi Nagasako, Hiromu Yamada, Hiroyuki Kurachi
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Patent number: 6589304Abstract: A method of bonding an abrasive solid mass to a desired member with an adhesive, wherein the abrasive solid mass has a porous abrasive structure in which a multiplicity of abrasive grains are held together by a bonding agent. The method includes a sealing-film forming step of forming a sealing film on a surface of the abrasive solid mass, for preventing the adhesive from penetrating into pores formed in the porous abrasive structure.Type: GrantFiled: August 14, 2002Date of Patent: July 8, 2003Assignee: Noritake Co., Ltd.Inventors: Toshimichi Nakagawa, Kazumasa Yoshida, Tomoharu Kondo
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Publication number: 20020142705Abstract: An abrasive film for polishing a workpiece, including: (a) a substrate; (b) a binder; (c) a multiplicity of abrasive grains which are fixed to a surface of the substrate by the binder; and (d) a water-soluble inorganic compound or a water-soluble organic acid alkali metal salt which is added to the binder. The water-soluble inorganic compound preferably consists of a weak-alkali metal salt or a weak-acid metal salt. The water-soluble organic acid alkali metal salt preferably consists of an anionic surface-active agent or a carboxylic acid alkali metal salt.Type: ApplicationFiled: March 26, 2002Publication date: October 3, 2002Applicant: NORITAKE CO., LTD.Inventor: Etsuo Sugiura
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Patent number: 6440185Abstract: A resinoid grinding wheel of the present invention has low grinding resistance and is capable of providing a ground workpiece excellent in ground surface quality without burn mark while maintaining essential properties of the resinoid grinding wheel such as low elastic modulus and strong force for holding abrasive grains. A typical resinoid grinding wheel of the present invention includes 25 parts by volume of Al2O3 abrasive grains with grain size of #150, 20 parts by volume of organic hollow material with average particle diameter of 80 &mgr;m, and 10 parts by volume of pores having 1 mm in size. They are all dispersed in 40 parts by weight of a bond made of cured epoxy resin.Type: GrantFiled: January 8, 2001Date of Patent: August 27, 2002Assignee: Noritake Co., Ltd.Inventors: Akira Nagata, Shigeki Nakane
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Patent number: 6408838Abstract: A rotary cutting saw comprising: a base disk; and a plurality of abrasive segments which are bonded to an outer circumferential surface of the base disk so as to be spaced apart from each other in a circumferential direction of the base disk. The base disk has a plurality of slits which are formed in the outer circumferential surface of the base disk so as to be located between the abrasive segments in the circumferential direction. Each of the slits is defined by a pair of side surfaces opposed to each other in the circumferential direction, and a part-cylindrical surface defining a part of a cylinder whose axis is parallel to the axial direction. The part-cylindrical surface has a circumferential width which is larger than a circumferential distance between the radially inner end portions of the side surfaces. The part-cylindrical surface is smoothly connected to one of the side surfaces without a stepped portion therebetween.Type: GrantFiled: June 26, 2000Date of Patent: June 25, 2002Assignees: Noritake Diamond Industries, Co., Ltd., Noritake Co., Ltd.Inventors: Seiya Ogata, Hitoshi Makihara
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Patent number: 6391383Abstract: A high emittance glass coating material which is applied to a surface of a specific structural body and fired on the surface, for providing on the surface a glass coating having a glass structure in which pigment particles having a predetermined degree of emissivity are dispersed, the high emittance glass coating material being characterized by including: a pigment covering film having a predetermined thickness, which is provided to cover each of the pigment particles, and which includes silicon dioxide (SiO2) such that a content of the silicon dioxide in the pigment covering film is higher than a content of the silicon dioxide in each portion of the glass structure which is adjacent to a corresponding one of the pigment particles.Type: GrantFiled: November 27, 1998Date of Patent: May 21, 2002Assignee: Noritake Co., Ltd.Inventors: Hirokazu Matsunaga, Misao Iwata, Shinji Kato, Kenji Yano, Kazuhiro Horimi, Yoshitsugu Kato, Takamitsu Isogai, Masakazu Hiyoshi, Takamitsu Fukui
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Patent number: 6382964Abstract: Firing process and apparatus for uniformly heat-treating a substrate having a film-forming composition thereon, wherein the substrate is subjected to a first soaking step in which the substrate is held for a predetermined time in a first heating chamber whose temperature is maintained at a first value, so that the temperature within the substrate is held at the first value evenly throughout an entire mass of the substrate, and after feeding of the substrate into a second heating chamber whose temperature is maintained at a predetermined second value which is different from the first value by a predetermined difference, the substrate is subjected to a second soaking step in which the substrate is held for a second predetermined time in the second heating chamber, so that the temperature within the substrate is held at the second value evenly throughout the entire mass of the substrate.Type: GrantFiled: May 22, 2001Date of Patent: May 7, 2002Assignees: Noritake Co., Ltd., Kyushu Noritake Co., Ltd.Inventors: Susumu Sakamoto, Hiroshi Oshima, Hiroyuki Mori, Hironobu Ichihara, Yoji Sato
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Patent number: 6296969Abstract: To provide a separator for a battery with high safety and a method for producing the same in which the separator has a shutdown function and capability of preventing meltdown, complete melting and cracks when the battery performs unusually. This separator comprises a porous ceramic sheet having ceramic fibers bonded to each other at their intersection points and polyolefin and comprises micropores for impregnation of an electrolyte.Type: GrantFiled: March 29, 1999Date of Patent: October 2, 2001Assignees: Noritake Co., Ltd., Sanyo Chemical Industries, Ltd.Inventors: Kenji Yano, Misao Iwata, Hirokazu Matsunaga, Yukio Shibata, Yoshio Tanimizu
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Publication number: 20010023055Abstract: Firing process and apparatus for uniformly heat-treating a substrate having a film-forming composition thereon, wherein the substrate is subjected to a first soaking step in which the substrate is held for a predetermined time in a first heating chamber whose temperature is maintained at a first value, so that the temperature within the substrate is held at the first value evenly throughout an entire mass of the substrate, and after feeding of the substrate into a second heating chamber whose temperature is maintained at a predetermined second value which is different from the first value by a predetermined difference, the substrate is subjected to a second soaking step in which the substrate is held for a second predetermined time in the second heating chamber, so that the temperature within the substrate is held at the second value evenly throughout the entire mass of the substrate.Type: ApplicationFiled: May 22, 2001Publication date: September 20, 2001Applicant: Noritake Co., Ltd. and Kyushu Noritake Co., Ltd.Inventors: Susumu Sakamoto, Hiroshi Oshima, Hiroyuki Mori, Hironobu Ichihara, Yoji Sato
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Patent number: 6280296Abstract: Surface polishing system adapted to polish, lap or grind a surface of a workpiece in a plane such that the workpiece is held in sliding contact with a polishing face of a rotating polishing plate, wherein the workpiece is rotated by a work rotating device about an autorotation axis thereof which is parallel to an axis of rotation of the polishing plate and which lies within the surface of the workpiece, and the autorotation axis of the workpiece is revolved by a work revolving device about a revolving axis which is parallel to the axis of rotation of the polishing plate and which lies within a circumscribed circle of the surface of the workpiece.Type: GrantFiled: November 30, 1999Date of Patent: August 28, 2001Assignee: Noritake Co., Ltd.Inventors: Makoto Sato, Yukio Yamaguchi, Noriyuki Tomikawa
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Patent number: 6261091Abstract: Firing process and apparatus for uniformly heat-treating a substrate having a film-forming composition thereon, wherein the substrate is subjected to a first soaking step in which the substrate is held for a predetermined time in a first heating chamber whose temperature is maintained at a first value, so that the temperature within the substrate is held at the first value evenly throughout an entire mass of the substrate, and after feeding of the substrate into a second heating chamber whose temperature is maintained at a predetermined second value which is different from the first value by a predetermined difference, the substrate is subjected to a second soaking step in which the substrate is held for a second predetermined time in the second heating chamber, so that the temperature within the substrate is held at the second value evenly throughout the entire mass of the substrate.Type: GrantFiled: October 25, 1999Date of Patent: July 17, 2001Assignees: Noritake Co., Ltd., Kyushu Noritake Co., Ltd.Inventors: Susumu Sakamoto, Hiroshi Oshima, Hiroyuki Mori, Hironobu Ichihara, Yoji Sato
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Patent number: 6165936Abstract: An alumina-based porous support with uniform physical properties is obtained in a rapid sintering process. An alumina raw material including a raw alumina powder and an inorganic binder is molded into an article, and the article is then sintered for 5 to 8 hours at 1520 to 1560.degree. C. using a roller hearth kiln.Type: GrantFiled: July 23, 1998Date of Patent: December 26, 2000Assignee: Noritake Co., Ltd.Inventors: Takao Yamada, Kazuhito Tsumuki
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Patent number: 6114748Abstract: In an AC plasma display panel having a glaze layer covering address electrodes, a proper amount of conductive filler is introduced into the glaze layer, to lower the volume resistivity of the glaze layer. Thus, generation of spark discharge can be suppressed in driving the display panel.Type: GrantFiled: June 22, 1998Date of Patent: September 5, 2000Assignees: Mitsubishi Denki Kabushiki Kaisha, Noritake Co., Limited, Kyushu Noritake Co., Ltd.Inventors: Shinichiro Nagano, Yoshiharu Ogawa, Masayuki Hiroshima, Hirotoshi Takechi
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Patent number: 6077570Abstract: A surface-decorated article by noble metal having a decorating matter of noble metal fused to the surface of a ceramic article. The decorating matter has a dual layer structure of a frit layer and an insulating noble metal film layer, which film layer comprising golden components of 60-90% Au, 3-15% Si, 2-11% In and 2-14% Ca. The noble metal decorating matter is not damaged on exposure to an electronic range, superior in chemical stability and abrasion resistance.Type: GrantFiled: May 7, 1998Date of Patent: June 20, 2000Assignee: Noritake Co., Ltd.Inventors: Masato Sano, Ryuta Yokoyama
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Patent number: 5980991Abstract: Firing process and apparatus for uniformly heat-treating a substrate having a film-forming composition thereon, wherein the substrate is subjected to a first soaking step in which the substrate is held for a predetermined time in a first heating chamber whose temperature is maintained at a first value, so that the temperature within the substrate is held at the first value evenly throughout an entire mass of the substrate, and after feeding of the substrate into a second heating chamber whose temperature is maintained at a predetermined second value which is different from the first value by a predetermined difference, the substrate is subjected to a second soaking step in which the substrate is held for a second predetermined time in the second heating chamber, so that the temperature within the substrate is held at the second value evenly throughout the entire mass of the substrate.Type: GrantFiled: October 23, 1996Date of Patent: November 9, 1999Assignees: Noritake Co., Ltd., Kyushu Noritake Co., Ltd.Inventors: Susumu Sakamoto, Hiroshi Oshima, Hiroyuki Mori, Hironobu Ichihara, Yoji Sato
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Patent number: 5972483Abstract: Surface-decorated utensil includes a ceramic ware and a plurality of decorative laminar elements of noble metal on its surface. As an alternative, the spacing between neighboring laminar elements is not less than 0.2 mm and the maximum length of each laminar element is not more than 8.5 mm. As another alternative, the spacing between neighboring laminar elements is not less than 10 mm and the maximum length of each laminar element is not more than 12 mm. In addition, the laminar elements are coated with a frit layer. The surface-decorated utensil is not damaged when used in an electronic range, while it is superior in chemical durability and coloration.Type: GrantFiled: December 20, 1996Date of Patent: October 26, 1999Assignee: Noritake Co., Ltd.Inventors: Masato Sano, Nobuhiro Inoko, Kazutaka Nakayama, Hideyuki Sekine
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Patent number: 5931992Abstract: A surface-decorated article by noble metal having a decorating matter of noble metal fused to the surface of a ceramic article. The decorating matter has a dual layer structure of a frit layer and an insulating noble metal film layer, which film layer comprising golden components of 60-90% Au, 3-15% Si, 2-11% In and 2-14% Ca. The noble metal decorating matter is not damaged on exposure to an electronic range, superior in chemical stability and abrasion resistance.Type: GrantFiled: May 7, 1998Date of Patent: August 3, 1999Assignee: Noritake Co., Ltd.Inventors: Masato Sano, Ryuta Yokoyama