Patents by Inventor Takafumi Hara
Takafumi Hara 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: 20130011777Abstract: Disclosed is a process for production of a decolorable toner, including: aggregating dispersed fine particles of a color material comprising at least a color-forming compound, a color-developing agent and a decoloring agent with dispersed fine particles comprising at least a binder resin comprising a polyester resin to form aggregates in an aqueous medium, adding a reactive polymer having an oxazoline group in to the aqueous medium, and fusing the aggregates in the aqueous medium. As a result, it becomes possible to produce a decolorable toner which suppresses the generation of fine powder due to the release of fine particles of an erasable color material from the toner.Type: ApplicationFiled: June 29, 2012Publication date: January 10, 2013Applicant: TOSHIBA TEC KABUSHIKI KAISHAInventors: Takayasu Aoki, Takafumi Hara, Tsuyoshi Itou, Masahiro Ikuta, Motonari Udo, Koji Shimokusa, Hiroshi Mizuhata
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Publication number: 20130011775Abstract: Disclosed is a toner obtained by coating surfaces of core particles including at least a binder resin having a carboxyl group and a coloring agent with successive coatings of a water-soluble crosslinking agent capable of crosslinking with a carboxyl group and a water-soluble polymer having a carboxyl group, which have been successively applied on the core particles and crosslinked with each other. The thus-formed toner is provided with a good harmony of favorable fixability represented by a low lowest fixable temperature and favorable storage stability represented by little aggregation after standing at 50° C. for 8 hours.Type: ApplicationFiled: June 29, 2012Publication date: January 10, 2013Applicant: TOSHIBA TEC KABUSHIKI KAISHAInventors: Tsuyoshi Itou, Motonari Udo, Kazuhisa Takeda, Takayasu Aoki, Masahiro Ikuta, Takafumi Hara
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Publication number: 20120328977Abstract: Encapsulated toner particles are formed by: aggregating core material particles containing at least a colorant and a core material resin in an aqueous dispersion medium to form core particles; adding coating resin particles into the aqueous dispersion medium during progress of the formation of the core material at a point of time when the volume-based median particle diameter of the core particles formed by the aggregation reaches 30 to 83% of that of desired toner particles; and continuing the aggregation to form a coating layer composed of a composite aggregate of the core material particles and the coating resin particles on the core material. In the thus-obtained toner, the colorant is uniformly and well incorporated in the toner particles, and therefore, the coloring ability is improved without causing a problem of release of fine powder.Type: ApplicationFiled: June 18, 2012Publication date: December 27, 2012Applicant: TOSHIBA TEC KABUSHIKI KAISHAInventors: Masahiro Ikuta, Takayasu Aoki, Tsuyoshi Itou, Motonari Udo, Takafumi Hara, Kazuhisa Takeda
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Patent number: 8227167Abstract: The method for producing a developing agent according to the invention contains subjecting the toner material dispersion liquid to mechanical shearing to make the granular mixture into fine particles, thereby providing a dispersion liquid containing fine particles having a smaller particle diameter than a particle diameter of the granular mixture. The toner material dispersion liquid is subjected to mechanical shearing under a temperature of a glass transition point Tg of the binder resin or more and a pressure of 10 MPa or more, and the resulting dispersion liquid containing the fine particles is depressurized with two or more stages while maintaining the temperature of a glass transition point Tg of the binder resin or more and then cooled to a temperature of a glass transition point Tg of the binder resin or less.Type: GrantFiled: July 9, 2009Date of Patent: July 24, 2012Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Tsuyoshi Itou, Takayasu Aoki, Takashi Urabe, Yasuhito Noda, Motonari Udo, Satoshi Araki, Masahiro Ikuta, Takafumi Hara, Asumi Matsumoto
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Patent number: 8226756Abstract: One embodiment of the invention is an emulsion type inkjet ink including water, a pigment, an emulsifier, and an alcohol compound in which the alcohol compound is dispersed in water with the emulsifier. The emulsifier is a polyoxyethylene sorbitan fatty acid ester compound, and the alcohol compound is a compound including an aromatic ring and having a boiling point of 180° C. or higher.Type: GrantFiled: December 8, 2009Date of Patent: July 24, 2012Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Ryozo Akiyama, Hiroshi Kiyomoto, Takafumi Hara, Maiko Yoshida
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Patent number: 8164706Abstract: In a liquid crystal display device 100 provided by the present invention, at least a part of a circuit board 16 can be held on an outer side surface 30B of a frame 30 by a board clip 50 mounted on the outer side surface 30B of the frame 30. The board clip 50 includes a plate-like main body portion 52 located so as to face the outer side surface 30B of the frame 30, front-side engaging portions 54 and 55, and a pair of rear-side engaging portions 56 and 57. A bezel receiving portion 60 contactable with a part of a peripheral portion of a bezel 20 is formed in the vicinity of the front-side engaging portions 54 and 55.Type: GrantFiled: December 24, 2009Date of Patent: April 24, 2012Assignee: Sharp Kabushiki KaishaInventors: Saori Nambo, Eriko Wakabayashi, Masanori Shimo, Takafumi Hara
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Publication number: 20120062645Abstract: According to one embodiment, an aqueous inkjet ink includes a color material, water in an amount of from 50-70% by mass of the total amount of the ink, and a water-soluble organic solvent in an amount of from 29-49% by mass of the total amount. The water-soluble organic solvent contains a compound represented by the following general formula 1, and the compound represented by the following general formula 1 accounts for 10-35% by mass of the total amount of the ink. The sum of the amounts of the color material, the water, and the water-soluble organic solvent is 100% by mass or less of the ink. Where, R1 and R2 each independently represent an alkyl group having 1 to 4 carbon atoms, and m and n each represent an integer satisfying the relation: 2?m+n?6.Type: ApplicationFiled: September 1, 2011Publication date: March 15, 2012Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: Takafumi Hara, Ryozo Akiyama, Maiko Yoshida, Chie Tonohiro, Atsushi Kubota
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Publication number: 20120062644Abstract: According to one embodiment, an aqueous inkjet ink includes a color material, water in an amount of 50-70% by mass of the total amount of the ink, and a water-soluble organic solvent in an amount of 29-49% by mass of the total amount. The soluble organic solvent contains a compound represented by the following general formula 1 which accounts for 10-36% by mass of the total amount of ink. When the amount of the compound is equal to the amount of the solvent, the total amount of the solvent is the compound. The sum of the amounts of the color material, the water, and the water-soluble organic solvent is 100% by mass or less of the ink. Where, X1, X2, and X3 each independently represent EOn, and X4 represents an CH3CH2— or an (EOn)O—. EOn is represented by the following general formula 2, where n representing an integer of 1-5.Type: ApplicationFiled: September 1, 2011Publication date: March 15, 2012Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: Takafumi Hara, Ryozo Akiyama, Maiko Yoshida, Chie Tonohiro, Atsushi Kubota
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Publication number: 20120033010Abstract: According to one embodiment, an aqueous inkjet ink includes a color material in an amount of 2 to 20% by mass of the total amount of ink, water in an amount of 41 to 70% by mass of the total amount, and a water-soluble organic solvent in an amount of 20 to 53% by mass of the total amount. The solvent contains a compound represented by the following general formula 1 which accounts for 20 to 50% by mass of the total amount of ink. When the amount of compound is equal to the amount of solvent, the total amount of solvent is the compound, and the sum of the amounts of the color material, the water, and the solvent is 100% by mass or less of the ink. Where, each of a, b, and c represents an integer of 1 or more, and satisfies 3?a+b+c?15.Type: ApplicationFiled: July 22, 2011Publication date: February 9, 2012Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: Maiko Yoshida, Ryozo Akiyama, Takafumi Hara, Chie Tonohiro, Atsushi Kubota
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Patent number: 8110062Abstract: A welding method and welding apparatus for resin members is provided in which dimensional accuracy of two resin members after welding can be secured and reduction in joining strength due to excessive laser irradiation can be prevented. In a method of superimposing a resin having a laser-transmitting property and a resin having laser absorptiveness and irradiating the resin members with a laser beam from the side of the laser-transmitting resin member to deposit the resin members on each other, irradiation with the laser beam is ended in accordance with reduction in the approaching speed of the two resin members during the irradiation with the laser beam.Type: GrantFiled: April 9, 2008Date of Patent: February 7, 2012Assignee: Mitsubishi Electric CorporationInventors: Shinsuke Asada, Takafumi Hara, Seizo Fujimoto, Masaaki Taruya
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Publication number: 20120013676Abstract: According to one embodiment, an aqueous inkjet ink includes a pigment in an amount of 2 to 20% by mass of the total amount of the aqueous inkjet ink, and a dispersion medium in which the pigment is dispersed. The dispersion medium contains water in the amount of 53 to 94% by mass, with the remainder of the dispersion medium being a compound represented by the following general formula 1. The water accounts for 50 to 80% by mass of the total amount of the aqueous inkjet ink. In the general formula 1, a, b, and c may be the same or different, each representing an integer of 1 or more, and satisfy the following inequation: 4?a+b+c?10.Type: ApplicationFiled: July 11, 2011Publication date: January 19, 2012Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: Ryozo Akiyama, Atsushi Kubota, Maiko Yoshida, Takafumi Hara, Chie Tonohiro
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Publication number: 20110286203Abstract: The present invention relates to the rigidity of a backlight chassis and is applicable to a liquid crystal display device including a backlight chassis and a light source located in the backlight chassis. A liquid crystal display device according to the present invention includes a backlight chassis (24), located to face a rear surface of a liquid crystal panel (10), for supporting a light source (22) for illuminating the rear surface of the liquid crystal panel (10). The backlight chassis (24) is a substantively flat plate-like member with upright peripheral portions (24a through 24d), and includes grooves (71 through 74) in a first area (A1) and a second area (A2), which are separated from each other by a border line (L) set on the backlight chassis (24). According to the present invention, the entirety of the backlight chassis is unlikely to be deflected.Type: ApplicationFiled: January 12, 2010Publication date: November 24, 2011Applicants: JFE STEEL CORPORATION, SHARP KABUSHIKI KAISHAInventors: Takeshi Ogura, Kazuyuki Ono, Takafumi Hara, Masateru Ueta, Yuji Yamasaki, Hideaki Kobiki, Tomokazu Nagao, Yuichi Watanabe
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Publication number: 20110279515Abstract: According to one embodiment, an aqueous inkjet ink includes a color material, water as a first liquid, propylene glycol as a second liquid, and a compound represented by the following general formula (PEG) or a compound represented by the following general formula (PGC) as a third liquid. The aqueous inkjet ink has a water activity of 0.85 or less. Ra—O—(CH2CH2O)n—H ??(PEG) In the formula, Ra represents H or CH3, and n represents 3 to 14. In the formula, Rb represents a group selected from CH2CH2O and CH2CHCH3O, and j, k, p, and q may be the same or different, and represent an integer of 1 or more, and satisfy the formula: 4?j+k+p+q?8.Type: ApplicationFiled: April 29, 2011Publication date: November 17, 2011Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: Maiko Yoshida, Ryozo Akiyama, Takafumi Hara, Chie Tonohiro, Atsushi Kubota
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Publication number: 20110279514Abstract: According to one embodiment, an aqueous inkjet ink includes water in an amount of from 15 to 50% by mass of the total amount of the ink, a glycol mixture in an amount of from 34 to 80% by mass of the total amount of the ink, and a pigment in an amount of from 2 to 20% by mass of the total amount of the ink. The glycol mixture contains 40 to 70% by mass of propylene glycol, with the remainder being isoprene glycol.Type: ApplicationFiled: April 29, 2011Publication date: November 17, 2011Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: Ryozo Akiyama, Atsushi Kubota, Maiko Yoshida, Takafumi Hara, Chie Tonohiro
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Publication number: 20110273515Abstract: According to one embodiment, an aqueous inkjet ink includes a dispersion medium that contains water and a water-soluble polyhydric alcohol having a weight average molecular weight of 400 or more, and a pigment. The pigment accounts for less than 5 mass % of the total amount of the aqueous inkjet ink. The aqueous inkjet ink has viscosities (mPa·s) measured using a cone-plate type viscometer at 20 rpm and satisfying the following relationships: VA/VB?1.5 VA?10 mPa·s 3 mPa·s?VB?15 mPa·s, where VA is the viscosity at 30° C., and VB the viscosity at 45° C.Type: ApplicationFiled: April 29, 2011Publication date: November 10, 2011Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: Takafumi Hara, Ryozo Akiyama, Maiko Yoshida, Chie Tonohiro, Atsushi Kubota
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Publication number: 20110273641Abstract: In a liquid crystal display device provided by the present invention, in a coupling part in which a plurality of frame components 32 and 42 forming a frame are coupled to each other, a part 53 of an end 50A of one of the frame components, i.e., the frame component 32, and a part 55 of an end 50B of the other frame component 42 overlap each other in a front-rear direction of the liquid crystal panel. Among the overlapping two ends 50A and 50B, the end facing an optical member 78 (member receiving portion 55) is close to the optical member 78, and is formed to be contactable with the optical member 78 in a surface-to-surface manner when the coupling part is bent toward the optical member 78.Type: ApplicationFiled: October 30, 2009Publication date: November 10, 2011Applicant: SHARP KABUSHIKI KAISHAInventors: Eriko Wakabayashi, Takafumi Hara, Masanori Shimo, Saori Nambo
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Publication number: 20110267556Abstract: In a liquid crystal display device 100 provided by the present invention, at least a part of a circuit board 16 can be held on an outer side surface 30B of a frame 30 by a board clip 50 mounted on the outer side surface 30B of the frame 30. The board clip 50 includes a plate-like main body portion 52 located so as to face the outer side surface 30B of the frame 30, front-side engaging portions 54 and 55, and a pair of rear-side engaging portions 56 and 57. A bezel receiving portion 60 contactable with a part of a peripheral portion of a bezel 20 is formed in the vicinity of the front-side engaging portions 54 and 55.Type: ApplicationFiled: December 24, 2009Publication date: November 3, 2011Applicant: Sharp Kabushiki KaishaInventors: Saori Nambo, Eriko Wakabayashi, Masanori Shimo, Takafumi Hara
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Publication number: 20110267751Abstract: In a display device provided by the present invention, among a plurality of sides forming a frame 30, one pair of sides facing each other respectively have protrusions 52 and 62 and clearance adjusting members 54 and 64, for adjusting a clearance between the protrusions 52 and 62 and a display panel 10 located on an inner-side panel receiving portion, provided as at least partially extending toward the inner-side panel receiving portion. An extending portion, extending toward the inner-side panel receiving portion, of one of the clearance adjusting members, i.e., the clearance adjusting member 54, and an extending portion, extending toward the inner-side panel receiving portion, of the other clearance adjusting member 64, have different thicknesses from each other in respective extending directions thereof.Type: ApplicationFiled: October 30, 2009Publication date: November 3, 2011Applicant: SHARP KABUSHIKI KAISHAInventors: Masanori Shimo, Takafumi Hara, Eriko Wakabayashi, Saori Nambo
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Publication number: 20110261107Abstract: According to one embodiment, an aqueous inkjet ink includes water and a pigment. The pigment is contained in the aqueous inkjet ink in an amount of less than 5 wt %. The queous inkjet ink has viscosities (mPa·s) measured at 25° C. using a cone-plate type viscometer and satisfying the following relationships: VB/VA?1.5 3 mPa·s?VA?15 mPa·s wherein VA represents a viscosity measured at a rotation speed of 50 rpm and VB represents a viscosity measured at a rotation speed of 2.5 rpm.Type: ApplicationFiled: March 18, 2011Publication date: October 27, 2011Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: Takafumi Hara, Ryozo Akiyama, Maiko Yoshida, Chie Tonohiro, Atsushi Kubota
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Publication number: 20110259238Abstract: According to one embodiment, an aqueous pigment ink includes water, a pigment, and a water-soluble polymeric compound. The pigment is contained in the aqueous pigment ink in an amount of less than 5 wt %. The aqueous pigment ink has viscosities (mPa·s) measured at 25° C. using a cone-plate type viscometer and satisfying the following relationships: 0?(VB?VA)/VB<0.05 VC/VA?1.5 3 mPa·s?VA?15 mPa·s wherein VA represents a viscosity measured at a rotation speed of 50 rpm, VB represents a viscosity measured at a rotation speed of 2.5 rpm, and VC represents a viscosity measured at a rotation speed of 50 rpm after adding calcium chloride in an amount of 0.5 wt % of the aqueous pigment ink.Type: ApplicationFiled: March 18, 2011Publication date: October 27, 2011Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: Takafumi Hara, Ryozo Akiyama, Maiko Yoshida, Chie Tonohiro, Atsushi Kubota