Patents by Inventor Haruo Koyama
Haruo Koyama 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).
-
Publication number: 20200398339Abstract: The present invention relates to a powder for additive manufacturing, having a composition consisting of, in mass %: 0.25<C<0.40, 0.001?Si?0.15, 0.30?Mn?0.45, 5.0?Cr?5.5, 1.0?Mo?1.5, 0.35?V?0.45, 0.01?N?0.05, 0.01?O?0.04, and optionally, P<0.10, Cu<0.20, Ni<0.20, Al<0.05, Zr<0.05, S<0.20, Pb<0.20, Bi<0.20, Nb<0.20, Ti<0.20, B<0.10, and Co<0.20, with the balance being Fe and unavoidable impurities, in which a surface of the powder for additive manufacturing is coated with an oxide film, and the oxide film has a thickness of 3 nm or more and 30 nm or less.Type: ApplicationFiled: June 15, 2020Publication date: December 24, 2020Inventors: Motohiro IBUKI, Masamichi KAWANO, Hirotsugu HORIO, Haruo KOYAMA
-
Patent number: 7860444Abstract: A fixing device comprises a thermally fixing roller, a belt, and pushing means which pushes the belt toward the thermally fixing roller. A nipping region is formed between the belt and the thermally fixing roller. A maximum pressure is produced in an upstream end region of the thermally fixing roller in the direction of rotation in the nipping region, another maximum pressure is produced in a downstream end region thereof in the direction of rotation in the nipping region, and a pressure is produced in an intermediate region, which pressure being not higher than the maximum pressure in the upstream end region and not higher than the another maximum pressure in the downstream end region.Type: GrantFiled: October 29, 2008Date of Patent: December 28, 2010Assignee: Kyocera Mita CorporationInventors: Hiroshi Ito, Haruo Koyama, Takao Besshi, Nobuyuki Kashiwagi, Junko Ito, Tadashi Ohba, Toshimitsu Takeuchi
-
Patent number: 7787801Abstract: An image forming apparatus includes an apparatus cabinet having a bottom face opposed to a floor surface and a front face for operating the apparatus, a plurality of foot members disposed on the bottom face for supporting the apparatus on the floor surface in a movable manner, and a shield member for shielding a gap formed between the bottom face and the floor surface at least at the side of the front face of the apparatus.Type: GrantFiled: April 23, 2008Date of Patent: August 31, 2010Assignee: Kyocera Mita CorporationInventor: Haruo Koyama
-
Publication number: 20090129834Abstract: A fixing device comprises a thermally fixing roller, a belt, and pushing means which pushes the belt toward the thermally fixing roller. A nipping region is formed between the belt and the thermally fixing roller. A maximum pressure is produced in an upstream end region of the thermally fixing roller in the direction of rotation in the nipping region, another maximum pressure is produced in a downstream end region thereof in the direction of rotation in the nipping region, and a pressure is produced in an intermediate region, which pressure being not higher than the maximum pressure in the upstream end region and not higher than the another maximum pressure in the downstream end region.Type: ApplicationFiled: October 29, 2008Publication date: May 21, 2009Inventors: Hiroshi Ito, Haruo Koyama, Takao Besshi, Nobuyuki Kashiwagi, Junko Ito, Tadashi Ohba, Toshimitsu Takeuchi
-
Patent number: 7466952Abstract: A fixing device comprises a thermally fixing roller, a belt, and pushing means which pushes the belt toward the thermally fixing roller. A nipping region is formed between the belt and the thermally fixing roller. A maximum pressure is produced in an upstream end region of the thermally fixing roller in the direction of rotation in the nipping region, another maximum pressure is produced in a downstream end region thereof in the direction of rotation in the nipping region, and a pressure is produced in an intermediate region, which pressure being not higher than the maximum pressure in the upstream end region and not higher than the another maximum pressure in the downstream end region.Type: GrantFiled: October 19, 2005Date of Patent: December 16, 2008Assignee: Kyocera Mita CorporationInventors: Hiroshi Ito, Haruo Koyama, Takao Besshi, Nobuyuki Kashiwagi, Junko Ito, Tadashi Ohba, Toshimitsu Takeuchi
-
Publication number: 20080267659Abstract: An image forming apparatus includes an apparatus cabinet having a bottom face opposed to a floor surface and a front face for operating the apparatus, a plurality of foot members disposed on the bottom face for supporting the apparatus on the floor surface in a movable manner, and a shield member for shielding a gap formed between the bottom face and the floor surface at least at the side of the front face of the apparatus.Type: ApplicationFiled: April 23, 2008Publication date: October 30, 2008Inventor: Haruo KOYAMA
-
Publication number: 20070025784Abstract: A fixing device comprises a thermally fixing roller, a belt, and pushing means which pushes the belt toward the thermally fixing roller. A nipping region is formed between the belt and the thermally fixing roller. A maximum pressure is produced in an upstream end region of the thermally fixing roller in the direction of rotation in the nipping region, another maximum pressure is produced in a downstream end region thereof in the direction of rotation in the nipping region, and a pressure is produced in an intermediate region, which pressure being not higher than the maximum pressure in the upstream end region and not higher than the another maximum pressure in the downstream end region.Type: ApplicationFiled: October 19, 2005Publication date: February 1, 2007Inventors: Hiroshi Ito, Haruo Koyama, Takao Besshi, Nobuyuki Kashiwagi, Junko Ito, Tadashi Ohba, Toshimitsu Takeuchi
-
Patent number: 6432159Abstract: A magnetic mixture comprising at least two kinds of powders which are uniformly mixed with each other. Each powder exhibits a significant magnetic property when its constituent elements have a predetermined composition ratio. Magnetic properties of each powder are retained in the magnetic mixture which exhibits, as a whole, a soft magnetic property. The magnetic mixture is useful as a raw material for a powder magnetic core.Type: GrantFiled: September 28, 2000Date of Patent: August 13, 2002Assignee: Daido Tokushuko Kabushiki KaishaInventors: Takanobu Saito, Satoshi Takemoto, Toshiaki Yashiro, Haruo Koyama, Shinichiro Yahagi
-
Patent number: 5834634Abstract: A method and an apparatus for measuring the toner concentration and the amount of electric charge, capable of simultaneously measuring the toner concentration and the amount of electric charge easily and maintaining high precision using a simple device.Type: GrantFiled: October 3, 1996Date of Patent: November 10, 1998Assignee: Mita Industrial Co., Ltd.Inventors: Koji Honda, Haruo Koyama, Yusuke Ishitani, Nobuaki Kawano
-
Patent number: 5282673Abstract: A compound resin wheel with two or more moldings integrated to form the resin wheel, wherein at least one of the two or more moldings made of a long fiber reinforced thermoplastic resin, the other molding or moldings made of metal and/or FRP.Type: GrantFiled: June 22, 1992Date of Patent: February 1, 1994Assignee: Bridgestone CorporationInventors: Haruo Koyama, Youichi Nishimuro, Kunio Machida, Yoshihide Fukahori
-
Patent number: 5277479Abstract: A resin wheel of a one piece wheel type comprising a rim and a disk molded integrally, in which a portion between an axle hole of the disk and the rim is in a form of a blind plate with no holes, and the wheel is formed by injection molding or injection compression molding of a fiber-reinforced thermoplastic resin. A resin wheel of a one piece wheel type comprising a rim and a disk molded integrally, in which a portion between an axle hole of the disk and the rim is in the form of a blind plate with no holes, excepting for bolt holes and the wheel is formed by injection molding or injection compression molding of a fiber-reinforced thermoplastic resin.Type: GrantFiled: June 10, 1992Date of Patent: January 11, 1994Assignee: Bridgestone CorporationInventors: Haruo Koyama, Youichi Nishimuro, Kunio Machida, Yoshihide Fukahori
-
Patent number: 5234259Abstract: A resin wheel consisting of two or more molded parts coupled together. The parts are molded separately and have threaded portions. Then, the threaded portion of one molded part is screwed into the threaded portion of the other molded part so that the parts are fitted and coupled together.Type: GrantFiled: June 18, 1992Date of Patent: August 10, 1993Assignee: Bridgestone CorporationInventors: Youichi Nishimuro, Haruo Koyama, Kunio Machida, Yoshihide Fukahori
-
Patent number: 5150156Abstract: An image recording machine for producing a high quality image both in a text part and in a photograph part, i.e., a crisp (low gradation) image in a text part and a gentle (high gradation) image in a photograph part. The gradation characteristic is altered from part to part within a sheet on which the image is produced by decreasing the voltage of the photoconductive drum previously charged at a preset full voltage within a limited area. Irradiation of less intense light onto the photoconductive drum within the limited area by an array of LED elements can be used to decrease the surface voltage.Type: GrantFiled: November 13, 1990Date of Patent: September 22, 1992Assignee: Mita Industrial Co., Ltd.Inventor: Haruo Koyama
-
Patent number: 4913747Abstract: A method of heat-treating a rail for obtaining a variety of strength levels from medium value to high value. The method has the steps of: preparing a steel rail maintained at a high temperature region not lower than the austenite field, and disposing a nozzle means around the head of the rail such that the nozzle means can direct a gaseous cooling medium toward the head of the rail; determining the distance between the nozzle means and the head of the rail in accordance with both the hardness level to be attained in the head of the rail and the carbon equivalent of the steel constituting the rail; moving the nozzle means such that the distance is attained between the nozzle means and the head of the rail; and directing the gaseous cooling medium towards the head at a predetermined flow rate and for a predetermined time so as to cool the head of the rail thereby attaining the desired hardness level in the head of the rail.Type: GrantFiled: February 9, 1989Date of Patent: April 3, 1990Assignee: Nippon Steel CorporationInventors: Keiji Fukuda, Takefumi Suzuki, Hideaki Kageyama, Yoshiaki Makino, Masanori Hisatsune, Eigo Matsubara, Mitiaki Ishii, Manabu Sato, Haruo Koyama
-
Patent number: 4607942Abstract: An electrostatic copying apparatus having defined therein a copying paper conveying passage extending from a paper feeder to a paper receiver through a transfer zone and a fixing zone. In the transfer zone, a toner image on an electrostatographic material is transferred to a copying paper, and then fixed in the fixing zone.Type: GrantFiled: September 14, 1984Date of Patent: August 26, 1986Assignee: Mita Industrial Co., Ltd.Inventors: Haruo Koyama, Toshio Nishino
-
Patent number: 4502067Abstract: Disclosed is a heat-sensitive recording material capable of forming an image of a hue close to a pure black at a low density, which comprises a dispersion of a leuco dye, a heat-fusible organic acidic substance solid at normal temperature and a sensitizing agent in a binder, wherein the leuco dye comprises a fluoran type leuco dye for forming a black color and a benzofluoran type leuco dye for forming a red dye in an amount of 0.01 to 1% by weight based on said black color-forming leuco dye.Type: GrantFiled: June 29, 1983Date of Patent: February 26, 1985Assignee: Mita Industrial Company LimitedInventors: Masanori Matsuda, Haruo Koyama, Nobuhiro Miyakawa
-
Patent number: 4500897Abstract: Disclosed is a heat-sensitive recording element capable of forming an image of a hue close to a pure black at a low density, which comprises a dispersion of a leuco dye, a heat-fusible organic acidic substance solid at normal temperature and a sensitizing agent in a binder, wherein the leuco dye comprises a fluoran type leuco dye for forming a black color and a rhodamine lactam type leuco dye for forming a red dye in an amount of 1.5 to 30% by weight based on said black color-forming leuco dye.Type: GrantFiled: June 29, 1983Date of Patent: February 19, 1985Assignee: Mita Industrial Co., Ltd.Inventors: Masanori Matsuda, Haruo Koyama, Nobuhiro Miyakawa
-
Patent number: 4416964Abstract: Disclosed is a dry magnetic developer consisting essentially of a particulate shaped article of a composition comprising a binder resin medium and a powdery magnetic material dispersed in the binder resin medium, wherein said composition is composed of a non-pulverizing agglomerate of cubic particles, and particles having a number average particle size of 1 to 10 microns, as measured by an electron microscope, are incorporated as the powdery magnetic material.This magnetic developer is excellent in the image sharpness, the resolving power and the half tone-reproducing property, and is especially effective for developing a positively charged latent image which is formed on a p-type photosensitive plate such as a selenium photosensitive plate or a photosensitive plate comprising an organic photoconductor layer.Type: GrantFiled: August 26, 1981Date of Patent: November 22, 1983Assignee: Mita Industrial Co., Ltd.Inventors: Nobuhiro Miyakawa, Takashi Teshima, Haruo Koyama, Kouji Maekawa, Masanori Fujii
-
Patent number: 4407923Abstract: Disclosed is a dry magnetic developer consisting essentially of a particulate shaped article of a composition comprising a binder resin medium and a powdery magnetic material dispersed in the binder resin medium, wherein said composition comprises as the powdery magnetic material a non-pulverizing agglomerate having a secondary particle size of 1 to 10 microns, which is formed by granulating and sintering fine cubic particles of magnetite or other ferrite having a primary particle size of 0.1 to 1 micron.Type: GrantFiled: June 24, 1982Date of Patent: October 4, 1983Assignee: Mita Industrial Co., Ltd.Inventors: Nobuhiro Miyakawa, Masanori Fujii, Kouzi Maekawa, Haruo Koyama, Takashi Teshima