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).

  • Publication number: 20130011777
    Abstract: 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: Application
    Filed: June 29, 2012
    Publication date: January 10, 2013
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Takayasu Aoki, Takafumi Hara, Tsuyoshi Itou, Masahiro Ikuta, Motonari Udo, Koji Shimokusa, Hiroshi Mizuhata
  • Publication number: 20130011775
    Abstract: 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: Application
    Filed: June 29, 2012
    Publication date: January 10, 2013
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Tsuyoshi Itou, Motonari Udo, Kazuhisa Takeda, Takayasu Aoki, Masahiro Ikuta, Takafumi Hara
  • Publication number: 20120328977
    Abstract: 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: Application
    Filed: June 18, 2012
    Publication date: December 27, 2012
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Masahiro Ikuta, Takayasu Aoki, Tsuyoshi Itou, Motonari Udo, Takafumi Hara, Kazuhisa Takeda
  • Patent number: 8227167
    Abstract: 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: Grant
    Filed: July 9, 2009
    Date of Patent: July 24, 2012
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Tsuyoshi Itou, Takayasu Aoki, Takashi Urabe, Yasuhito Noda, Motonari Udo, Satoshi Araki, Masahiro Ikuta, Takafumi Hara, Asumi Matsumoto
  • Patent number: 8226756
    Abstract: 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: Grant
    Filed: December 8, 2009
    Date of Patent: July 24, 2012
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Ryozo Akiyama, Hiroshi Kiyomoto, Takafumi Hara, Maiko Yoshida
  • Patent number: 8164706
    Abstract: 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: Grant
    Filed: December 24, 2009
    Date of Patent: April 24, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Saori Nambo, Eriko Wakabayashi, Masanori Shimo, Takafumi Hara
  • Publication number: 20120062645
    Abstract: 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: Application
    Filed: September 1, 2011
    Publication date: March 15, 2012
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventors: Takafumi Hara, Ryozo Akiyama, Maiko Yoshida, Chie Tonohiro, Atsushi Kubota
  • Publication number: 20120062644
    Abstract: 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: Application
    Filed: September 1, 2011
    Publication date: March 15, 2012
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventors: Takafumi Hara, Ryozo Akiyama, Maiko Yoshida, Chie Tonohiro, Atsushi Kubota
  • Publication number: 20120033010
    Abstract: 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: Application
    Filed: July 22, 2011
    Publication date: February 9, 2012
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventors: Maiko Yoshida, Ryozo Akiyama, Takafumi Hara, Chie Tonohiro, Atsushi Kubota
  • Patent number: 8110062
    Abstract: 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: Grant
    Filed: April 9, 2008
    Date of Patent: February 7, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shinsuke Asada, Takafumi Hara, Seizo Fujimoto, Masaaki Taruya
  • Publication number: 20120013676
    Abstract: 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: Application
    Filed: July 11, 2011
    Publication date: January 19, 2012
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventors: Ryozo Akiyama, Atsushi Kubota, Maiko Yoshida, Takafumi Hara, Chie Tonohiro
  • Publication number: 20110286203
    Abstract: 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: Application
    Filed: January 12, 2010
    Publication date: November 24, 2011
    Applicants: JFE STEEL CORPORATION, SHARP KABUSHIKI KAISHA
    Inventors: Takeshi Ogura, Kazuyuki Ono, Takafumi Hara, Masateru Ueta, Yuji Yamasaki, Hideaki Kobiki, Tomokazu Nagao, Yuichi Watanabe
  • Publication number: 20110279515
    Abstract: 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: Application
    Filed: April 29, 2011
    Publication date: November 17, 2011
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventors: Maiko Yoshida, Ryozo Akiyama, Takafumi Hara, Chie Tonohiro, Atsushi Kubota
  • Publication number: 20110279514
    Abstract: 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: Application
    Filed: April 29, 2011
    Publication date: November 17, 2011
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventors: Ryozo Akiyama, Atsushi Kubota, Maiko Yoshida, Takafumi Hara, Chie Tonohiro
  • Publication number: 20110273515
    Abstract: 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: Application
    Filed: April 29, 2011
    Publication date: November 10, 2011
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventors: Takafumi Hara, Ryozo Akiyama, Maiko Yoshida, Chie Tonohiro, Atsushi Kubota
  • Publication number: 20110273641
    Abstract: 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: Application
    Filed: October 30, 2009
    Publication date: November 10, 2011
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Eriko Wakabayashi, Takafumi Hara, Masanori Shimo, Saori Nambo
  • Publication number: 20110267556
    Abstract: 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: Application
    Filed: December 24, 2009
    Publication date: November 3, 2011
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Saori Nambo, Eriko Wakabayashi, Masanori Shimo, Takafumi Hara
  • Publication number: 20110267751
    Abstract: 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: Application
    Filed: October 30, 2009
    Publication date: November 3, 2011
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Masanori Shimo, Takafumi Hara, Eriko Wakabayashi, Saori Nambo
  • Publication number: 20110261107
    Abstract: 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: Application
    Filed: March 18, 2011
    Publication date: October 27, 2011
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventors: Takafumi Hara, Ryozo Akiyama, Maiko Yoshida, Chie Tonohiro, Atsushi Kubota
  • Publication number: 20110259238
    Abstract: 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: Application
    Filed: March 18, 2011
    Publication date: October 27, 2011
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBA
    Inventors: Takafumi Hara, Ryozo Akiyama, Maiko Yoshida, Chie Tonohiro, Atsushi Kubota