Patents by Inventor Makoto Tomono
Makoto Tomono 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: 5629118Abstract: A method of use of a toner for developing electrostatic images is disclosed which comprises a coloring agent, a styrene homopolymer or copolymer with a vinyl monomer or monomers, and polypropylene in an amount between about 0.02 and 40 parts by weight per 100 parts by weight of the styrene homopolymer or copolymer.Type: GrantFiled: June 6, 1995Date of Patent: May 13, 1997Assignee: Konica CorporationInventors: Makoto Tomono, Noriyoshi Tarumi, Masayuki Sato
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Patent number: 5629123Abstract: A toner for developing electrostatic images is disclosed which comprises a coloring agent, a styrene homopolymer or copolymer with a vinyl monomer or monomers, and polypropylene in an amount between about 0.02 and 40 parts by weight per 100 parts by weight of the styrene homopolymer or copolymer.Type: GrantFiled: June 6, 1995Date of Patent: May 13, 1997Assignee: Konica CorporationInventors: Makoto Tomono, Noriyoshi Tarumi, Masayuki Sato
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Patent number: 5023158Abstract: A toner for developing electrostatic images is disclosed which comprises a coloring agent, a styrene homopolymer or copolymer with a vinyl monomer or moners, and polypropylene in an amount between about 0.02 and 40 parts by weight per 100 parts by weight of the styrene homopolymer or copolymer.Type: GrantFiled: July 3, 1990Date of Patent: June 11, 1991Assignee: Konica CorporationInventors: Makoto Tomono, Noriyoshi Tarumi, Masayuki Sato
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Patent number: 5004666Abstract: A toner for developing electrostatic images is disclosed which comprises a coloring agent, a styrene homopolymer or copolymer with a vinyl monomer or moners, and polypropylene in an amount between about 0.02 and 40 parts by weight per 100 parts by weight of the styrene homopolymer or copolymer.Type: GrantFiled: March 29, 1990Date of Patent: April 2, 1991Assignee: Konica CorporationInventors: Makoto Tomono, Noriyoshi Tarumi, Masayuki Sato
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Patent number: 4997739Abstract: A toner for developing electrostatic images is disclosed which comprises a coloring agent, a styrene homopolymer or copolymer with a vinyl monomer or moners, and polypropylene in an amount between about 0.02 and 40 parts by weight per 100 parts by weight of the styrene homopolymer or copolymer.Type: GrantFiled: February 6, 1990Date of Patent: March 5, 1991Assignee: Konica CorporationInventors: Makoto Tomono, Noriyoshi Tarumi, Masayuki Sato
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Patent number: 4988598Abstract: A toner for developing electrostatic images is disclosed which comprises a coloring agent, a styrene homopolymer or copolymer with a vinyl monomer or moners, and polypropylene in an amount between about 0.02 and 40 parts by weight per 100 parts by weight of the styrene homopolymer or copolymer.Type: GrantFiled: February 6, 1990Date of Patent: January 29, 1991Assignee: Konica CorporationInventors: Makoto Tomono, Noriyoshi Tarumi, Masayuki Sato
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Patent number: 4968574Abstract: The present invention relates to toners for electrophotography wherein the main resin component comprises a lower molecular weight polymer and a higher molecular weight polymer each of which is different from the other wherein the higher molecular weight polymer has a glass transition point of at least 50.degree. C. and the lower molecular weight polymer has a glass transition point no higher than 65.degree. C. The above polymers comprise one or more polymers selected from styrene polymers, arcylic polymers, and styrene-acrylic copolymers. Generally, the lower molecular weight polymer has a weight average molecular weight of 50,000 or less and the higher molecular weight polymer has a weight average molecular weight of 80,000 or more.Type: GrantFiled: January 9, 1986Date of Patent: November 6, 1990Assignees: Sekisui Chemical Co., Ltd., Konishiroku Photo Industry Co., Ltd.Inventors: Hideaki Morita, Takahira Kasuya, Goichi Yamakawa, Makoto Tomono, Hirozo Funaki, Minoru Kohara
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Patent number: 4921771Abstract: A toner for developing electrostatic images is disclosed which comprises a coloring agent, a styrene homopolymer or copolymer with a vinyl monomer or moners, and polypropylene having a number average molecular weight of about 3000 to 4000 in an amount between about 0.02 and 40 parts by weight per 100 parts by weight of the styrene homopolymer or copolymer.Type: GrantFiled: January 19, 1988Date of Patent: May 1, 1990Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Makoto Tomono, Noriyoshi Tarumi, Masayuki Sato
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Patent number: 4917982Abstract: A toner for developing electrostatic images is disclosed which comprises a coloring agent, a styrene homopolymer or copolymer with a vinyl monomer or moners, and polypropylene having a number average molecular weight of about 3000 to 4000 in an amount between about 0.02 and 40 parts by weight per 100 parts by weight of the styrene homopolymer or copolymer.Type: GrantFiled: January 19, 1988Date of Patent: April 17, 1990Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Makoto Tomono, Noriyoshi Tarumi, Masayuki Sato
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Patent number: 4792512Abstract: A charging method of an electrostatic image developer which makes it possible to electrically charge an insulating one-component developer or a two-component developer consisting of a toner and a carrier to a desired charged state and which comprises introducing the developer into a charging space between a pair of sheet-like charging members opposing each other in which space an alternating field is formed, and oscillating the developer by means of the alternating field for charging it. A developing method of a non-contact or contact system which develops the electrostatic image by use of the developer charged electrically by the above-mentioned charging method.Type: GrantFiled: June 19, 1987Date of Patent: December 20, 1988Assignee: Konishiroku Photo Industry, Co., Ltd.Inventors: Satoshi Haneda, Takashi Itoh, Ken Nakamura, Makoto Tomono
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Patent number: 4675267Abstract: A charging method of an electrostatic image developer which makes it possible to electrically charge an insulating one-component developer or a two-component developer consisting of a toner and a carrier to a desired charged state and which comprises introducing the developer into a charging space between a pair of sheet-like charging members opposing each other in which space an alternating field is formed, and oscillating the developer by means of the alternating field for charging it. A developing method of a non-contact or contact system which develops the electrostatic image by use of the developer charged electrically by the above-mentioned charging method.Type: GrantFiled: February 24, 1986Date of Patent: June 23, 1987Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Satoshi Haneda, Takashi Itoh, Ken Nakamura, Makoto Tomono
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Patent number: 4657837Abstract: The present invention relates to toners for developing electrostatically charged images which are comprised of a polyester binder resin condensed from diols of the formula ##STR1## with a polyhydric carboxylic acid or a derivative thereof wherein the polyhydric carboxylic acid is a mixture of dihyridic carboxylic acid or its alkylesters and about 30 mole % to about 80 mole % of the total acid content of more hydric carboxylic acids or therein hydrids.Type: GrantFiled: November 6, 1985Date of Patent: April 14, 1987Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Hideaki Morita, Takahira Kasuya, Goichi Yamakawa, Makoto Tomono, Shinichiro Yasuda
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Patent number: 4624559Abstract: A developing method for an electrostatic latent image comprises the steps of applying and retaining a layer of developer on a supporting sleeve, conveying the developer on the supporting sleeve to a development area, and regulating the quantity of the developer on the supporting sleeve by a developer regulating device before the developer is conveyed to the development area. The regulating step includes impressing a bias voltage so as to establish a field between the supporting sleeve and the regulating device in order to selectively retain developer on the supporting sleeve which has a desired polarity and quantity of charge for development. The developer regulating device may be a sleeve rotated in a direction opposite to the direction of rotation of the supporting sleeve, and has a bias voltage impressed thereon.Type: GrantFiled: February 10, 1986Date of Patent: November 25, 1986Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Satoshi Haneda, Masahiko Itaya, Makoto Tomono
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Patent number: 4623604Abstract: Toner for developing electrostatically charged images comprising nuclear particles formed by polymerization, hydrophobic silica, and a resin, wherein said resin is coated on said nuclear particles and said silica is dispersed in said resin. A method for producing said toner is also disclosed, said method comprising polymerizing nuclear particles, dissolving a resin in a solvent, which asserts a lesser solvating action against said nuclear particles than against said resin, to form a solution, dispersing said hydrophobic silica in said solution, mixing said nuclear particles with said dispersion, and drying said mixture.Type: GrantFiled: January 25, 1985Date of Patent: November 18, 1986Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Hiroyuki Takagiwa, Kenzi Thuzita, Goichi Yamakawa, Makoto Tomono, Saburo Wakimoto, Sadayasu Miyahara, Tetsumasa Ishida, Yoshihiko Hyosu, Tsuneo Wada
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Patent number: 4564573Abstract: An electrostatic image developing toner comprises a binder resin which contains at least 60% by weight of a styrene-butadiene copolymer. The copolymer contains a component A having a molecular weight of at least 100,000 in an amount of at least 20% by weight relative to the binder resin, and a component B having a molecular weight of at least 500,000 in the component A is not more than 15% by weight relative to the binder resin. The toner has adequate flowability and noncoagulation property and is capable of forming a superior visible image in a contact heat fixing system.Type: GrantFiled: July 24, 1984Date of Patent: January 14, 1986Assignees: Konishiroku Photo Industry Co., Ltd., Japan Synthetic Rubber Co., Ltd.Inventors: Hideaki Morita, Takahira Kasuya, Goichi Yamakawa, Makoto Tomono, Isao Furuta, Minoru Tsuneyoshi
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Patent number: 4553500Abstract: A method of and apparatus for developing an electrostatic latent image wherein an oscillating electric field is formed between a developing member and an electrostatic latent image receptor in synchronism with the rotation of the developing member. A voltage having a waveform obtained by periodically superposing a pulse-like voltage is applied on the developing member.Type: GrantFiled: July 24, 1984Date of Patent: November 19, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Masahiko Itaya, Satoshi Haneda, Makoto Tomono
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Patent number: 4543311Abstract: A pressure fixing method comprising passing a base carrying a toner image through a pair of rollers is disclosed. The toner contains a prepolymer and the rollers are loaded with a linear pressure of from 5 to 70 kg/cm.Type: GrantFiled: July 26, 1982Date of Patent: September 24, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Hiroyuki Takagiwa, Syunji Matsuo, Makoto Tomono
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Patent number: 4530595Abstract: A method and apparatus for cleaning toner from the surface of an electrostatic image holder wherein a film member comprising superposed insulating and conductive layers is positioned close to an electrostatic image holder so that the insulating layer of the film member faces the image holder. At least one of a d.c. voltage and an a.c. voltage is applied between the electrostatic image holder and the film member, the toner from the surface of the electrostatic image holder being removed and transferred onto the surface of the insulating layer of the film member. The toner from the surface of the insulating layer of the film member may be removed by a removing means. Also, an electrostatic charge eliminator is provided for eliminating the electrostatic charge from the surface of the insulating layer after removal of the toner therefrom.Type: GrantFiled: August 13, 1982Date of Patent: July 23, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Masahiko Itaya, Satoshi Haneda, Noriyoshi Tarumi, Makoto Tomono
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Patent number: 4525056Abstract: A developing means for an electrostatic latent image has, within a non-magnetic developer transport member, plural magnets arranged in series in a defined area between a develops layer thickness regulating member and a developing area opposite an image forming member so as to generate a magnetic flux distribution having a pair of homopolar peaks for eliminating a density uneveness of the developer layer on said transport member.Type: GrantFiled: June 9, 1982Date of Patent: June 25, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Masahiko Itaya, Satoshi Haneda, Makoto Tomono
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Patent number: 4518674Abstract: An iron powder developer carrier for electrophotography having at least the outer surface thereof coated with iron oxide. The iron oxide has a particle size of 50 to 200.mu., an apparent density of 1.5 to 2.5 g/cm.sup.3 and a specific surface area of 0.01 to 0.3 m.sup.2 /g.A process for the preparation of iron powder developer carriers for electrophotography, which comprises the steps of subjecting a starting iron powder to a primary calcination treatment in an inert gas atmosphere without using a binder, pulverizing and classifying said calcination product to prepare an intermediate iron powder, reducing the intermediate iron powder in a reducing atmosphere and washing the intermediate iron powder, and subjecting the intermediate iron powder to an oxidizing calcination treatment.Type: GrantFiled: March 26, 1984Date of Patent: May 21, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shotaro Watanabe, Makoto Tomono, Goichi Yamakawa, Takeo Nishimura, Nobuo Takahashi