Patents by Inventor Yukinori Nakayama
Yukinori Nakayama 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: 20080292983Abstract: Disclosed is a magnetic one-component toner for development of an electrostatic latent image used in a magnetic one-component jumping development system in which a photoconductor is an a-Si photoconductor having a thickness of 30 ?m or less and Rz of a developer carrier is from 2.0 to 6.0 ?m. A cleaning means for removing the toner from the surface of the photoconductor is a cleaning blade. Titanium oxide, as an external additive, is added to the toner. The titanium oxide has a liberation rate within a range from 10 to 22% and contains a low resistance titanium oxide having a volume resistivity within a range from 100 to 107?·cm and a high resistance titanium oxide having a volume resistivity within a range from 108 to 1013?·cm, a mass ratio of the low resistance titanium oxide to the high resistance titanium oxide within a range from 1.3:1 to 4:1.Type: ApplicationFiled: August 11, 2005Publication date: November 27, 2008Applicant: KYOCERA MITA CORPORATIONInventors: Hiroshi Mizuhata, Yukinori Nakayama, Kousuke Satou, Akira Tanaka, Kouzuo Teramoto
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Publication number: 20080286677Abstract: Disclosed is a toner for a developer comprising cylindrical toner particles formed of a toner composition containing at least a binder resin and a releasant as toner components, and an external additive, wherein the cylindrical toner particles have an average circularity of 0.880 or more and 0.930 or less.Type: ApplicationFiled: November 30, 2007Publication date: November 20, 2008Applicant: KYOCERA MITA CORPORATIONInventors: Naruo Yabe, Takanori Tanaka, Akira Tanaka, Kousuke Satou, Yukinori Nakayama
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Patent number: 7410740Abstract: The developer comprises magnetic toners and the magnetic carriers which forms magnetic ears on the surface of the developing roller. The magnetic toner is of an average particle size 0.01 ?m through 0.50 ?m and is of octahedron shape that is a convex polyhedron surrounded by eight triangles as a basis, each of the vertexes edges of the octahedron shape toner being in a curved surface shape and having a portion that can be taken as a straight line on the outer periphery of a projected image of the octahedron shape toner. The magnetic ears are electrically charged by the friction between the magnetic toner and the magnetic carriers and the magnetic ears on the developing roller are carried to the electrostatic latent image on the photoreceptor. The latent image is developed by the magnetic toners in the magnetic ears, in a small gap between the developing roller and the photoreceptor.Type: GrantFiled: March 15, 2006Date of Patent: August 12, 2008Assignee: Kyocera Mita CorporationInventors: Yukinori Nakayama, Kouzou Teramoto, Kousuke Satou, Hiroshi Mizuhata
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Publication number: 20080124642Abstract: An object of the present invention is to provide a toner for development of an electrostatic latent image, which has excellent developability and which is used in an electrophotographic image forming apparatus. One aspect of the present invention pertains to a toner for development of an electrostatic latent image, comprising cylindrical toner particles and titanium oxide particles added externally to the cylindrical toner particles, wherein the titanium oxide particles have an average primary particle size within a range from 10 to 100 nm, and the titanium oxide particles have a specific volume resistivity value within a specific range. Such a toner for development of an electrostatic latent image suppresses an image deletion phenomenon and is excellent in charge characteristics, and also exerts an extremely excellent effect on long-term printing durability.Type: ApplicationFiled: November 27, 2007Publication date: May 29, 2008Applicant: Kyocera Mita CorporationInventors: Yukinori Nakayama, Kousuke Satou
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Publication number: 20080053619Abstract: A substrate bonding apparatus for bonding substrates together in a vacuum at high speeds, with a high degree of accuracy includes a first chamber C1, a second chamber C2, and a third chamber C3. Two substrates to be bonded together are loaded in the first chamber C1. The two substrates are bonded together in the second chamber C2. The two substrates bonded together are unloaded in the third chamber C3. The first and third chambers are variably controlled from an atmospheric pressure state to a medium vacuum state. The second chamber is variably controlled from the medium vacuum state to a high vacuum state.Type: ApplicationFiled: October 23, 2007Publication date: March 6, 2008Inventors: Yukinori Nakayama, Tatsuharu Yamamoto, Masayuki Saito
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Publication number: 20070122726Abstract: The invention aims to provide magnetic single-component toner of which externally added magnetic powder is not buried into the toner even when the toner has experienced stress due to use and thermal stress, which is superior in stability of electrostatic charge and allow images without lack in parts of the image to be formed stably, and with which occurrence of a filming phenomenon of the photoreceptor drum and dielectric breakdown due to charge leaks to the photoreceptor drum are prevented and stable formation of thin layer of toner on the developing sleeve for a long period can be secured, and to provide a developing unit and image forming apparatus using the toner.Type: ApplicationFiled: September 29, 2006Publication date: May 31, 2007Applicant: KYOCERA MITA CORPORATIONInventors: Hiroshi Mizuhata, Yukinori Nakayama
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Publication number: 20070092818Abstract: A magnetic single component toner for electrostatic latent image development, which is used in a magnetic single component toner projection development method using an a-Si photosensitive member having a film thickness of no more than 30 ?m, and a cleaning blade as a cleaning means for removing toner from the surface of this photosensitive member, so as to develop an electrostatic latent image formed on the photosensitive member, with a developing agent bearing member, comprises strontium titanate which has been rendered hydrophobic and has a specific surface area of 8.0 to 30 m2/g, and which is added as an external additive at a ratio of 0.3 to 5.0 parts by mass with respect to 100 parts by mass of the toner particle.Type: ApplicationFiled: October 26, 2005Publication date: April 26, 2007Inventors: Hiroshi Mizuhata, Yukinori Nakayama, Kouzou Teramoto, Kousuke Satou, Akira Tanaka
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Publication number: 20070051462Abstract: A substrate bonding apparatus for bonding substrates together in a vacuum at high speeds, with a high degree of accuracy includes a first chamber C1, a second chamber C2, and a third chamber C3. Two substrates to be bonded together are loaded in the first chamber C1. The two substrates are bonded together in the second chamber C2. The two substrates bonded together are unloaded in the third chamber C3. The first and third chambers are variably controlled from an atmospheric pressure state to a medium vacuum state. The second chamber is variably controlled from the medium vacuum state to a high vacuum state.Type: ApplicationFiled: August 31, 2006Publication date: March 8, 2007Inventors: Yukinori Nakayama, Tatsuharu Yamamoto, Masayuki Saito
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Publication number: 20070052914Abstract: With substrates to be bonded together becoming larger, there are problems in that a bonding apparatus needs to be built larger to maintain accuracy of products and operation of such a bonding apparatus becomes more complicated. A bonding apparatus includes Z-axis drive mechanisms, an upper chamber, and a lower chamber. The Z-axis drive mechanisms for moving an upper frame vertically are disposed at four corners of a mount. The upper chamber is suspended from the upper frame and has an upper table inside. The lower chamber has a lower table inside. The lower table is supported on the mount via a plurality of support legs. The upper chamber and the lower chamber are united together through a seal ring to define a vacuum chamber. The upper table is coupled to the upper frame and moved by the Z-axis drive mechanisms via the upper frame. Moving the upper frame moves the upper chamber vertically to open or close the vacuum chamber.Type: ApplicationFiled: May 25, 2006Publication date: March 8, 2007Inventors: Masaaki Ito, Yukinori Nakayama, Tatsuharu Yamamoto, Hiroaki Imai
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Publication number: 20060222984Abstract: The toner of the present invention is characterized in that the charges rise up rapidly, the charge quantity is not insufficient nor excessive, the photoreceptor contamination is minimized and the toner is endurable under harsh conditions and against the high stress usage. The magnetic particle contained in the toner is of average particle size 0.01 ?m through 0.50 ?m, is of octahedron shape that is a convex polyhedron surrounded by eight triangles as a basis, each of vertexes and edges of the octahedron being in a curved surface shape and having a portion that can be taken as a straight line on the outer periphery of a projected image of said octahedron. The sphericity of the toner is 0.94 through 0.98. Here, the sphericity is defined by C2/C1, where C1 is a circumferential length of an image projected on a plane and C2 is a circumferential length of an assumed circle area as same as that of the projected image. Further, a number content of the toner of particle size 0.6 ?m through 2.Type: ApplicationFiled: March 31, 2006Publication date: October 5, 2006Applicant: Kyocera Mita CorporationInventors: Kouzou Teramoto, Yukinori Nakayama, Kousuke Satou, Hiroshi Mizuhata
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Publication number: 20060222983Abstract: The object is to provide a magnetic toner with which toner scattering, toner spent to carrier, development of scratch streaks by the magnetic brush on the photoreceptor drum can be prevented for a prolonged period and a good image characteristic (in image density and background fogging) can be maintained for a prolonged period, and an image forming method using the magnetic toner. A two-component developer comprising carriers and toner which contains magnetic particle at least in a binder resin thereof, the magnetic particle being of basically polyhedral shaped shape, vertexes and edges of said polyhedral shape being curved surfaces, said shape having peripheral parts taken as straight lines in a projected image thereof, saturation magnetization of said toner in a magnetic field of 79.6 kA/m being 4.0 to 15.Type: ApplicationFiled: March 30, 2006Publication date: October 5, 2006Applicant: Kyocera Mita CorporationInventors: Yukinori Nakayama, Kousuke Satou, Kouzou Teramoto, Hiroshi Mizuhata
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Publication number: 20060216622Abstract: The two component developer comprises magnetic toners and the magnetic carriers which forms magnetic ears on the surface of the developing roller. The magnetic toner is of an average particle size 0.01 ?m through 0.50 ?m and is of octahedron shape that is a convex polyhedron surrounded by eight triangles as a basis, each of the vertexes and edges of the octahedron shape toner being in a curved surface shape and having a portion that can be taken as a straight line on the outer periphery of a projected image of the octahedron shape toner. The magnetic ears are electrically charged by the friction between the magnetic toner and the magnetic carriers and the magnetic ears on the developing roller are carried to the electrostatic latent image on the photoreceptor. The latent image is developed by the magnetic toners in the magnetic ears, in a small gap between the developing roller and the photoreceptor.Type: ApplicationFiled: March 15, 2006Publication date: September 28, 2006Applicant: Kyocera Mita CorporationInventors: Yukinori Nakayama, Kouzou Teramoto, Kousuke Satou, Hiroshi Mizuhata
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Publication number: 20060141379Abstract: Magnetic toner involves magnetic powder 1 having the particle shape of an octahedron2 that is a convex polyhedron surrounded by eight triangles as a basis, each of the vertexes and edges of the octahedron being in a curved surface shape, and having a portion 3 that can be taken as a straight line on the outer periphery of its projected image. Therefore, the magnetic toner is superior in both two contradictory properties, that is, the property of making it easy for a charging amount to quickly rise as well as improving the charging amount and the property of preventing dielectric breakdown of the photosensitive layer of the amorphous silicon photoreceptor from occurring within a short period due to charge-up, thereby making it possible to form a good image under a wide environment. In an image forming method, an electrostatic latent image is developed into a toner image by a magnetic one-component jumping developing method using the magnetic toner.Type: ApplicationFiled: November 29, 2005Publication date: June 29, 2006Inventors: Kouzou Teramoto, Yukinori Nakayama, Hiroshi Mizuhata, Kousuke Satou
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Publication number: 20060078813Abstract: Magnetic toner involves magnetic powder 1 having the particle shape of an octahedron 2 that is a convex polyhedron surrounded by eight triangles as a basis, each of the vertexes and edges of the octahedron being in a curved surface shape, and having a portion 3 that can be taken as a straight line on the outer periphery of its projected image. Therefore, the magnetic toner is superior in both two contradictory properties, that is the property of making it easy for a charging amount to quickly rise as well as improving the charging amount and the property of making it difficult for charge-up to occur, thereby making it possible to form a good image under a wide environment. In an image forming method, an electrostatic latent image is developed into a toner image by a magnetic one-component jumping developing method using the magnetic toner.Type: ApplicationFiled: October 7, 2005Publication date: April 13, 2006Inventors: Yukinori Nakayama, Kouzou Teramoto, Hiroshi Mizuhata, Kousuke Satou
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Patent number: 6929835Abstract: The present invention provides an anti-solvent laminate body baying an excellent anti-solvent characteristic when used in a solvent atmosphere or a manufacturing method thereof. In the anti-solvent laminate body used in a solvent atmosphere comprising a substrate portion or a manufacturing method thereof an which an electrostatic latent image developing toner is printed and a printing portion formed of the electrostatic latent image developing toner, wherein the electro latent image developing toner contains a binder resin which has a solubility parameter (SP2) which is different from a solubility parameter (SP1) of a solvent which forms a solvent atmosphere by not lees than about 5(MJ/m3)1/2 in an absolute value.Type: GrantFiled: February 20, 2003Date of Patent: August 16, 2005Assignee: Kyocera CorporationInventor: Yukinori Nakayama
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Patent number: 6852460Abstract: A toner, such as an electrostatic latent image developing toner and a MICR toner, has an even charge distribution, and exhibits balanced charging characteristics without decreases in frictional electrification or increases in charge, as well as superior fluidity, environmental independence, and durability. This is achieved by treating toner particles, which include binder resin and magnetic particles, with an external additive particle that is one of: a combination of rutile-type titanium oxide and anatase-type titanium oxide; and rutile-type titanium oxide that falls in a range of 5 to 10% by volume when a total volume of the toner is regarded as being 100%.Type: GrantFiled: April 23, 2002Date of Patent: February 8, 2005Assignee: Kyocera CorporationInventors: Yukinori Nakayama, Yojiro Sato, Hiroaki Moriyama, Masaki Ishii, Noriya Okamoto
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Publication number: 20030186151Abstract: A toner, such as an electrostatic latent image developing toner and a MICR toner, has an even charge distribution, and exhibits balanced charging characteristics without decreases in frictional electrification or increases in charge, as well as superior fluidity, environmental independence, and durability. This is achieved by treating toner particles, which include binder resin and magnetic particles, with an external additive particle that is one of: a combination of rutile-type titanium oxide and anatase-type titanium oxide; and rutile-type titanium oxide that falls in a range of 5 to 10% by volume when a total volume of the toner is regarded as being 100%.Type: ApplicationFiled: April 23, 2002Publication date: October 2, 2003Inventors: Yukinori Nakayama, Yojiro Sato, Hiroaki Moriyama, Masaki Ishii, Noriya Okamoto
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Publication number: 20030170413Abstract: The present invention provides an anti-solvent laminate body having an excellent anti-solvent characteristic when used in a solvent atmosphere or a manufacturing method thereof. In the anti-solvent laminate body used in a solvent atmosphere comprising a substrate portion or a manufacturing method thereof on which an electrostatic latent image developing toner is printed and a printing portion formed of the electrostatic latent image developing toner, wherein the electro latent image developing toner contains a binder resin which has a solution parameter (SP2) which is different from a solution parameter (SP1) of a solvent which forms a solvent atmosphere by not less than about 5(MJ/m3)1/2in an absolute value.Type: ApplicationFiled: February 20, 2003Publication date: September 11, 2003Applicant: KYOCERA CORPORATIONInventor: Yukinori Nakayama