Patents by Inventor Yoshikazu Kaneko
Yoshikazu Kaneko 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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Publication number: 20060016268Abstract: A fluid pressure sensor (1) for measuring the pressure of a fluid comprises a diaphragm portion (12) which is a strain generating body, a silicon oxide film (21) as an insulating film, and a strain gauge (20) made of crystalline silicon, and austenitic precipitation hardening type Fe—Ni heat-resisting steel excellent in mechanical strength and corrosion resistance is used for the diaphragm portion (12). The silicon oxide film (21) is formed with the internal stress thereof adjusted to the range from ?150 to 130 MPa. With this feature, the fluid pressure sensor (1) ensures high precision and reliability, and may be used even for measurement of a highly corrosive fluid.Type: ApplicationFiled: July 15, 2005Publication date: January 26, 2006Applicant: NAGANO KEIKI CO., LTD.Inventors: Hiroshi Nagasaka, Takeshi Abe, Yoshikazu Kaneko
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Patent number: 6890698Abstract: A thermosensitive recording material having a support, a thermosensitive coloring layer provided on the support and containing a leuco dye and a color developer for developing the leuco dye upon application of heat, and a protective layer provided on the thermosensitive coloring layer and containing polyvinyl alcohol having reactive carbonyl groups, a hydrazide compound which crosslinks the polyvinyl alcohol through the reactive carbonyl groups, and a basic filler. The protective layer may be formed by applying a coating composition containing polyvinyl alcohol having reactive carbonyl groups, a hydrazide compound which crosslinks the polyvinyl alcohol through the reactive carbonyl groups, and a basic filler onto a thermosensitive coloring layer provided on a support, and drying the applied coating composition to crosslink the polyvinyl alcohol.Type: GrantFiled: March 21, 2002Date of Patent: May 10, 2005Assignee: Ricoh Company, Ltd.Inventors: Mitsuru Naruse, Yoshikazu Kaneko
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Patent number: 6883379Abstract: An absolute-pressure type of pressure sensor is provided. The sensor has a pressure detecting device having a metal diaphragm. Strain gauges are disposed on one surface of the diaphragm, whose other surface is formed to receive fluid to be detected. The sensor comprises a lid, relay board, two seal rings, and input/output terminal. The lid provides a reference pressure space. The relay board is electrically connected to the gauge and composed of laminated ceramic members having both of through holes formed to pass through both sides thereof and a protrusion formed outwardly. The two seal rings are located to face the two sides of the board, respectively. The one seal ring air-tightly connects the relay board and the diaphragm. The other seal ring air-tightly connects the relay board and the lid. The terminal is electrically connected to the relay board and mounted on the protrusion of the relay board.Type: GrantFiled: May 19, 2003Date of Patent: April 26, 2005Assignee: Nagano Keiki Co., Ltd.Inventors: Yoshikazu Kaneko, Hiroshi Nagasaka
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Patent number: 6846619Abstract: There is provided a leuco dye dispersion liquid for a thermosensitive recording material wherein the leuco dye is being dispersed with an anionic surfactant and an nonionic surfactant, while average particle diameter of the leuco dye ranges from 0.10 ?m to 0.30 ?m and content of particles less than or equal to 0.07 ?m in diameter of the dye is not greater than 1.0%. The leuco dye dispersion liquid shows no fogging, and can cause a high optical density of image on thermosensitive member with excellent brightness in background area, and a high durability for storage at elevated temperature.Type: GrantFiled: March 22, 2002Date of Patent: January 25, 2005Assignee: Ricoh Company, Ltd.Inventors: Yoshikazu Kaneko, Yasutomo Mori, Kunio Hayakawa, Mitsunobu Morita, Takeshi Kajikawa, Shuuji Miyamoto, Yuuichi Kawaguchi
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Patent number: 6823706Abstract: A steel wire, 0.10-0.40 mm in diameter, obtained by subjecting a high-carbon (0.70-0.90 wt. %) steel wire material to heat treatment and wire drawing, wherein its tensile strength and test values of special repeated torsional tests satisfy a predetermined relation; and a method of manufacturing the same. A high strength steel wire which has so high a ductility as to substantially prevent the wire from being broken even during wire twisting, and which rarely encounters a decrease in the ductility even after the wire has been subjected to age hardening by heating, is obtained, and a method of manufacturing the same is economical.Type: GrantFiled: March 13, 2000Date of Patent: November 30, 2004Assignee: Bridgestone CorporationInventors: Yoshikazu Kaneko, Naohiko Obana, Masuhiro Fujita, Hideki Masubuchi, Toshiyuki Kobayashi
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Patent number: 6710015Abstract: A thermosensitive recording material having a support, a thermosensitive recording layer containing a leuco dye and a color developer, and an intermediate layer interposed therebetween. The intermediate layer contains hollow particles having a hollowness of 60 to 98%, a maximum particle diameter (D100) of 5.0 to 10.0 &mgr;m and a ratio D100/D50 of the maximum particle diameter (D100) to the median volume equivalent particle diameter (D50) in the range of 1.5 to 3.0. The hollow particles may be composed of a crosslinked polymer of a chlorine-free vinyl monomer.Type: GrantFiled: June 25, 2002Date of Patent: March 23, 2004Assignee: Ricoh Company, Ltd.Inventors: Yoshikazu Kaneko, Yasutomo Mori, Mitsuru Naruse, Kunio Hayakawa, Mitsunobu Morita
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Publication number: 20030213307Abstract: An absolute-pressure type of pressure sensor is provided. The sensor has a pressure detecting device having a metal diaphragm. Strain gauges are disposed on one surface of the diaphragm, whose other surface is formed to receive fluid to be detected. The sensor comprises a lid, relay board, two seal rings, and input/output terminal. The lid provides a reference pressure space. The relay board is electrically connected to the gauge and composed of laminated ceramic members having both of through holes formed to pass through both sides thereof and a protrusion formed outwardly. The two seal rings are located to face the two sides of the board, respectively. The one seal ring air-tightly connects the relay board and the diaphragm. The other seal ring air-tightly connects the relay board and the lid. The terminal is electrically connected to the relay board and mounted on the protrusion of the relay board.Type: ApplicationFiled: May 19, 2003Publication date: November 20, 2003Applicant: Nagano Keiki Co., Ltd.Inventors: Yoshikazu Kaneko, Hiroshi Nagasaka
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Publication number: 20030125205Abstract: A thermosensitive recording material having a support, a thermosensitive recording layer containing a leuco dye and a color developer, and an intermediate layer interposed therebetween. The intermediate layer contains hollow particles having a hollowness of 60 to 98%, a maximum particle diameter (D100) of 5.0 to 10.0 &mgr;m and a ratio D100/D50 of the maximum particle diameter (D100) to the median volume equivalent particle diameter (050) in the range of 1.5 to 3.0. The hollow particles may be composed of a crosslinked polymer of a chlorine-free vinyl monomer.Type: ApplicationFiled: June 25, 2002Publication date: July 3, 2003Inventors: Yoshikazu Kaneko, Yasutomo Mori, Mitsuru Naruse, Kunio Hayakawa, Mitsunobu Morita
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Publication number: 20030060366Abstract: There is provided a leuco dye dispersion liquid for a thermosensitive recording material wherein the leuco dye is being dispersed with an anionic surfactant and an nonionic surfactant, while average particle diameter of the leuco dye ranges from 0.10 &mgr;m to 0.30 &mgr;m and content of particles less than or equal to 0.07 &mgr;m in diameter of the dye is not greater than 1.0%. The leuco dye dispersion liquid shows no fogging, and can cause a high optical density of image on thermosensitive member with excellent brightness in background area, and a high durability for storage at elevated temperature.Type: ApplicationFiled: March 22, 2002Publication date: March 27, 2003Applicant: Ricoh Company, Ltd.Inventors: Yoshikazu Kaneko, Yasutomo Mori, Kunio Hayakawa, Mitsunobu Morita, Takeshi Kajikawa, Shuuji Miyamoto, Yuuichi kawaguchi
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Publication number: 20030039917Abstract: A thermosensitive recording material having a support, a thermosensitive coloring layer provided on the support and containing a leuco dye and a color developer for developing the leuco dye upon application of heat, and a protective layer provided on the thermosensitive coloring layer and containing polyvinyl alcohol having reactive carbonyl groups, a hydrazide compound which crosslinks the polyvinyl alcohol through the reactive carbonyl groups, and a basic filler. The protective layer may be formed by applying a coating composition containing polyvinyl alcohol having reactive carbonyl groups, a hydrazide compound which crosslinks the polyvinyl alcohol through the reactive carbonyl groups, and a basic filler onto a thermosensitive coloring layer provided on a support, and drying the applied coating composition to crosslink the polyvinyl alcohol.Type: ApplicationFiled: March 21, 2002Publication date: February 27, 2003Applicant: Ricoh Company Ltd.Inventors: Mitsuru Naruse, Yoshikazu Kaneko
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Patent number: 6102095Abstract: A corrosion resistant steel cord for reinforcing rubber articles, particularly a belt and/or carcass of a pneumatic tire, has a residual compressive stress inside the twisting helix of each steel filament such that a ratio R.sub.1 /R.sub.0 is less than one, where R.sub.0 is the radius of curvature of a helix in each helically formed steel filament obtained by untwisting of the cord and R.sub.1 is the radius of curvature of the helix after removal of a surface layer from the inside of the helix in the steel filament. The steel filaments have a tensile strength of 4,000-4,800 N/mm.sup.2.Type: GrantFiled: November 24, 1997Date of Patent: August 15, 2000Assignees: Bridgestone Corporation, Bridgestone Metalpha CorporationInventors: Naohiko Obana, Yoshikazu Kaneko, Ryuzo Osawa
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Patent number: 5873962Abstract: A steel cord intended for use to reinforce rubber products is produced by drawing, into a steel filament of 0.10 to 0.40 mm in diameter and more than 3,000 N/mm.sup.2 in strength, a wire rod having a carbon content of more than 0.70% by weight, and twisting a plurality of such steel filaments together. Also a pneumatic tire is provided which employs in at least a portion of a reinforcing member thereof the steel cord improved in corrosion resistance and having an R.sub.1 /R.sub.0 ratio .times.100 which is less than 100, where R.sub.0 is the radius of spiral curvature of the spiraled steel filament resulting from untwisting said steel cord and R.sub.1 is the radius of spiral curvature of said steel filament of which the surface layer inside the spiral is removed by dissolving.Type: GrantFiled: December 19, 1996Date of Patent: February 23, 1999Assignee: Bridgestone Metalpha CorporationInventors: Yoshikazu Kaneko, Naohiko Obana
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Patent number: 5822973Abstract: A steel cord intended for use to reinforce rubber products is produced by drawing, into a steel filament of 0.10 to 0.40 mm in diameter and more than 3,000 N/mm.sup.2 in strength, a wire rod having a carbon content of more than 0.70% by weight, and twisting a plurality of such steel filaments together. Also a pneumatic tire is provided which employs in at least a portion of a reinforcing member thereof the steel cord improved in corrosion resistance and having an R.sub.1 /R.sub.0 ratio.times.100 which is less than 100, where R.sub.0 is the radius of spiral curvature of the spiraled steel filament resulting from untwisting said steel cord and R.sub.1 is the radius of spiral curvature of said steel filament of which the surface layer inside the spiral is removed by dissolving.Type: GrantFiled: October 6, 1997Date of Patent: October 20, 1998Assignee: Bridgestone Metalpha CorporationInventors: Yoshikazu Kaneko, Naohiko Obana
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Patent number: 5806296Abstract: A steel cord intended for use to reinforce rubber products is produced by drawing, into a steel filament of 0.10 to 0.40 mm in diameter and more than 3,000 N/mm.sup.2 in strength, a wire rod having a carbon content of more than 0.70% by weight, and twisting a plurality of such steel filaments together. Also a pneumatic tire is provided which employs in at least a portion of a reinforcing member thereof the steel cord improved in corrosion resistance and having an R.sub.1 /R.sub.0 ration.times.100 which is less than 100, where R.sub.0 is the radius of spiral curvature of the spiraled steel filament resulting from untwisting said steel cord and R.sub.1 is the radius of spiral curvature of said steel filament of which the surface layer inside the spiral is removed by dissolving.Type: GrantFiled: May 23, 1996Date of Patent: September 15, 1998Assignee: Bridgestone Metalpha CorporationInventors: Yoshikazu Kaneko, Naohiko Obana
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Patent number: 5565298Abstract: A method of producing a toner for developing latent electrostatic images is disclosed, which comprises the steps of dispersing resin particles comprising a resin in an organic solvent in which the resin is not dissolved; dissolving a dye in the organic solvent before or after dispersing the resin particles in the organic solvent to prepare a dispersion in which the resin particles and the dye are contained, thereby dying the resin particles with the dye; and removing the organic solvent from the dispersion, wherein the ratio of the solubility [D.sub.1 ] of the dye in the organic solvent to the solubility [D.sub.2 ] of the dye in the resin of the resin particles, [D.sub.1 ]/[D.sub.2 ], is not more than 0.5.Type: GrantFiled: May 26, 1995Date of Patent: October 15, 1996Assignee: Ricoh Company, Ltd.Inventors: Yoshihiro Suguro, Masaki Takatsugi, Hiroshi Yamashita, Kenkichi Muto, Kazumi Ohtaki, Yoshikazu Kaneko, Takayuki Hoshina
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Patent number: 5547802Abstract: An image formation material for forming images including color images, such as a toner or developer for use in image formation methods such as electrophotography, electrostatic recording, and in an ink jet printing, includes a binder resin, a dye, and a quencher for preventing the deterioration of the dye; and a method of preventing the fading of images formed by the above image formation methods can be carried out by use of this image formation material.Type: GrantFiled: October 31, 1994Date of Patent: August 20, 1996Assignee: Ricoh Company, Ltd.Inventors: Hiromitsu Kawase, Yoshikazu Kaneko, Shoji Maruyama
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Patent number: 5471234Abstract: A recording apparatus which when used includes in an arbitrary order steps of brining a contact material into contact with a surface of a recording medium, and selectively heating the surface of the recording medium. The surface of the recording medium has a characteristic which a receding contact angle becomes smaller when the recording medium is brought into contact with liquid and it is in the heated status. The contact material is selected from a liquid, a vapor or a liquid under conditions of a temperature lower than a temperature at which the receding contact angle of the recording medium starts to decrease. An area having the receding contact angle corresponding to a temperature of the recording medium obtained by selectively heating the surface of the recording medium in accordance with image information in formed, as latent image, on the surface of the recording medium.Type: GrantFiled: June 10, 1993Date of Patent: November 28, 1995Assignee: Ricoh Company, Ltd.Inventors: Yasuo Katano, Tsutomu Nakajima, Yoshikazu Kaneko, Hiroyuki Horiguchi
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Patent number: 5387488Abstract: A toner for developing latent electrostatic images to visible toner images, composed of toner particles containing a thermoplastic resin and a compound with formula (I) or a compound with formula (II) serving as a coloring agent: ##STR1## The toner particles may be composed of thermoplastic resin particles which are dyed with one of the compounds (I) or (II) serving as a coloring agent.Type: GrantFiled: March 30, 1993Date of Patent: February 7, 1995Assignee: Ricoh Company, Ltd.Inventors: Yoshikazu Kaneko, Takayuki Hoshina
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Patent number: 5278126Abstract: A recording process includes in an arbitrary order steps of bringing a contact material into contact with a surface of a recording medium, and selectively heating the surface of the recording medium. The surface of the recording medium has a characteristic which a receding contact angle becomes smaller when the recording medium is brought into contact with liquid and it is in the heated status. The contact material is selected from a liquid, a vapor or a liquid under conditions of a temperature lower than a temperature at which the receding contact angle of the recording medium starts to decrease. An area having the receding contact angle corresponding to a temperature of the recording medium obtained by selectively heating the surface of the recording medium in accordance with image information in formed, as latent image, on the surface of the recording medium.Type: GrantFiled: December 3, 1990Date of Patent: January 11, 1994Assignee: Ricoh Company, Ltd.Inventors: Yasuo Katano, Tsutomu Nakajima, Yoshikazu Kaneko, Hiroyuki Horiguchi
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Patent number: 4987046Abstract: An electrophotographic photoconductor is formed of a metallic base drum and a photoconductive layer formed thereon. The base drum is an electroseamed tube prepared by high-frequency welding of a tubular metallic plate or strip. The electroseamed tube may be subjected to extruding or drawing, straightness improving by use of correcting rollers, or machining, grinding, abrasion finish, electro-polishing or anodizing for treatment of its surface.Type: GrantFiled: March 14, 1989Date of Patent: January 22, 1991Assignee: Ricoh Company, Ltd.Inventors: Atsushi Kutami, Yoshikazu Kaneko