Patents by Inventor Tatsuya Morita

Tatsuya Morita 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: 20140080047
    Abstract: To provide an electrophotographic toner, which contains a crystalline resin, a non-crystalline resin, a colorant, and a releasing agent, wherein the toner has a storage elastic modulus of 5.0×104 Pa to 5.0×106 Pa at 80° C., and a storage elastic modulus of 2.0×102 Pa to 2.0×103 Pa at 140° C., and wherein the toner has a ratio (C)/((C)+(A)) of 0.10 or greater, where (C) is an integrated intensity of a diffraction spectrum derived from a crystalline structure, (A) is an integrated intensity of a diffraction spectrum derived from a non-crystalline structure, and the diffraction spectrum is a diffraction spectrum of the toner as measured by an X-ray diffraction spectrometer.
    Type: Application
    Filed: September 17, 2013
    Publication date: March 20, 2014
    Inventors: Rintaro TAKAHASHI, Kazumi SUZUKI, Masana SHIBA, Tatsuya MORITA, Yoshitaka YAMAUCHI, Azumi MIYAAKE
  • Publication number: 20140051019
    Abstract: Toner contains a binder resin containing a crystalline resin having a urethane and/or urea bonding; and a colorant, wherein in a diffraction spectrum of the toner as measured by an X-ray diffraction instrument, a ratio {C/(C+A)} of an integral intensity C of the spectrum derived from the crystalline structure to an integral intensity A of the spectrum derived from the non-crystalline structure is 0.12 or greater, wherein the toner satisfies the following relation 1: T1?T2?30° C. (Relation 1), where T1 represents the maximum endothermic peak in the first temperature rising from 0° C. to 100° C. at the temperature rising rate of 10° C./min and T2 represents the maximum exothermic peak in the first temperature falling from 100° C. to 0° C. at the temperature falling rate of 10° C./min as T1 and T2 are measured by diffraction scanning calorimetry (DSC).
    Type: Application
    Filed: August 5, 2013
    Publication date: February 20, 2014
    Inventors: Satoyuki Sekiguchi, Hiroshi Yamashita, Minoru Masuda, Susumu Chiba, Tatsuya Morita, Atsushi Yamamoto, Shinya Nakayama, Masahide Yamada, Kohsuke Nagata, Keiji Makabe, Toyoshi Sawada
  • Publication number: 20130330522
    Abstract: White toner contains a binder resin, a white pigment, and a releasing agent, wherein the white pigment is coated with the releasing agent and dispersed in the binder resin.
    Type: Application
    Filed: May 31, 2013
    Publication date: December 12, 2013
    Inventors: Kazumi SUZUKI, Tatsuya MORITA, Yoshitaka YAMAUCHI, Masana SHIBA, Azumi MIYAAKE
  • Patent number: 8603718
    Abstract: An anisotropic magnetic material-dispersed resin carrier including: fine magnetic particles; and a binder resin in which at least the fine magnetic particles are dispersed, wherein the anisotropic magnetic material-dispersed resin carrier has a magnetic anisotropy where magnetic fields of the fine magnetic particles are orientated in the same direction, and wherein the anisotropic magnetic material-dispersed resin carrier has a saturation magnetization of 16 emu/g to 30 emu/g, a coercive force of 15 kA/m to 40 kA/m, and a number average particle diameter of 15 ?m or more but less than 100 ?m.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: December 10, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazumi Suzuki, Masaki Yoshino, Hisao Kurosu, Tatsuya Morita, Tomoko Kino, Shingo Sakashita
  • Patent number: 8592118
    Abstract: In accordance with some embodiments, a toner including a first binder resin, a release agent, a release agent dispersing resin, and a colorant is provided. The first binder resin includes an amorphous polyester resin (a) having a polyhydroxycarboxylic acid skeleton in its main chain. The polyhydroxycarboxylic acid skeleton comprises optically-active monomers having an optical purity X of 80% by mole or less. The optical purity X is represented by the following formula: X(% by mole)=|X(L-form)?X(D-form)| wherein X(L-form) and X(D-form) represent ratios (% by mole) of L-form and D-form optically-active monomers, respectively. The release agent includes an ester of a fatty acid having an average carbon number of 18 to 24 with glycerin or a polyglycerin having an average polymerization degree of 2 to 10. The ester has a melting point of 55 to 80° C.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: November 26, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Shingo Sakashita, Kazumi Suzuki, Tatsuya Morita
  • Publication number: 20130236826
    Abstract: A toner for electrophotography, which is prepared by a method including dissolving or dispersing a toner composition including at least a binder resin, or binder resin and a binder resin precursor as a resin component; and a colorant in an organic solvent to form an oil phase; emulsifying or dispersing the oil phase in an aqueous medium to form an emulsion dispersion comprising emulsified particles; converging the emulsified particles to granulate mother toner particles, including controlling a temperature of the emulsion dispersion to control a circularity of the mother toner particles; and removing the organic solvent, wherein the resin component includes a crystalline resin in an amount not less than 50% by weight, and the mother toner particles have an average circularity of from 0.940 to 0.980.
    Type: Application
    Filed: December 10, 2012
    Publication date: September 12, 2013
    Inventors: Keiji MAKABE, Masahide Yamada, Shinya Nakayama, Atsushi Yamamoto, Hideyuki Santo, Yukiko Nakajima, Daiki Yamashita, Kazumi Suzuki, Tatsuya Morita, Shingo Sakashita
  • Publication number: 20130157183
    Abstract: A developer, including a toner including a binder resin comprising a crystalline resin; and a colorant, and a resin carrier comprising a resin; a magnetic particulate material having a magnetic anisotropy, dispersed in the resin, and having a saturated magnetization of from 16 to 30 emu/g, a coercive force of from 15 to 40 kA/m and an average particle diameter not less than 15 ?m and less than 100 ?m.
    Type: Application
    Filed: November 16, 2012
    Publication date: June 20, 2013
    Inventors: Hideyuki Santo, Masahide Yamada, Kazumi Suzuki, Shinya Nakayama, Atsushi Yamamoto, Tatsuya Morita, Shingo Sakashita, Yukiko Nakajima, Keiji Makabe, Daiki Yamashita
  • Publication number: 20130017480
    Abstract: A toner set for electrophotography, including a black toner; a yellow toner; a magenta toner; a cyan toner; and a bright yellow toner, wherein the magenta toner includes a magenta colorant mainly including C.I. Pigment Red 122, the yellow toner has a hue angle of from 93 to 100° and the bright yellow toner has a hue angle of from 60 to 85° in L*a*b* color system.
    Type: Application
    Filed: June 19, 2012
    Publication date: January 17, 2013
    Inventors: Kazumi SUZUKI, Tatsuya MORITA, Shingo SAKASHITA
  • Publication number: 20120288791
    Abstract: In accordance with some embodiments, a toner including a first binder resin, a release agent, a release agent dispersing resin, and a colorant is provided. The first binder resin includes an amorphous polyester resin (a) having a polyhydroxycarboxylic acid skeleton in its main chain. The polyhydroxycarboxylic acid skeleton comprises optically-active monomers having an optical purity X of 80% by mole or less. The optical purity X is represented by the following formula: X (% by mole)=|X(L-form)?X(D-form)| wherein X(L-form) and X(D-form) represent ratios (% by mole) of L-form and D-form optically-active monomers, respectively. The release agent includes an ester of a fatty acid having an average carbon number of 18 to 24 with glycerin or a polyglycerin having an average polymerization degree of 2 to 10. The ester has a melting point of 55 to 80° C.
    Type: Application
    Filed: April 26, 2012
    Publication date: November 15, 2012
    Inventors: Shingo Sakashita, Kazumi Suzuki, Tatsuya Morita
  • Publication number: 20120202147
    Abstract: An anisotropic magnetic material-dispersed resin carrier including: fine magnetic particles; and a binder resin in which at least the fine magnetic particles are dispersed, wherein the anisotropic magnetic material-dispersed resin carrier has a magnetic anisotropy where magnetic fields of the fine magnetic particles are orientated in the same direction, and wherein the anisotropic magnetic material-dispersed resin carrier has a saturation magnetization of 16 emu/g to 30 emu/g, a coercive force of 15 kA/m to 40 kA/m, and a number average particle diameter of 15 ?m or more but less than 100 ?m.
    Type: Application
    Filed: January 31, 2012
    Publication date: August 9, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventors: Kazumi SUZUKI, Masaki Yoshino, Hisao Kurosu, Tatsuya Morita, Tomoko Kino, Shingo Sakashita
  • Patent number: 8206885
    Abstract: A toner prepared by pulverization methods, including a binder resin; and a colorant, wherein the binder resin is prepared by melting and kneading a polyester resin having an unsaturated bond with a crosslinking reaction initiator diluted with a release agent, and the colorant is a press cake pigment after washed.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: June 26, 2012
    Assignee: Ricoh Company Limited
    Inventors: Satoshi Ogawa, Tatsuya Morita
  • Publication number: 20120082926
    Abstract: A toner comprising an amorphous polyester, a crystalline polyester that is forming domains in the toner, and a colorant that is being dispersed at least in the domains of the crystalline polyester. The toner may be obtained by dispersing an oil phase including the amorphous polyester or a precursor capable of producing the amorphous polyester, the crystalline polyester, the colorant, and an organic solvent, in an aqueous medium to prepare an O/W dispersion, the oil phase; and removing the organic solvent from the O/W dispersion.
    Type: Application
    Filed: September 20, 2011
    Publication date: April 5, 2012
    Inventors: Kazumi SUZUKI, Tatsuya MORITA, Shingo SAKASHITA, Tsuyoshi SUGIMOTO
  • Publication number: 20110177447
    Abstract: The present invention provides a toner containing base particles formed by emulsifying or dispersing, in an aqueous medium, a toner composition liquid which is obtained by dissolving or dispersing, in an organic solvent, at least a binder resin soluble in the organic solvent and a colorant masterbatch containing a colorant and a colorant dispersion resin, wherein the colorant dispersion resin is a resin having sparing solubility defined below: where the “sparing solubility” means that when 4 parts by mass of the colorant dispersion resin are added to and mixed with 10 parts by mass of the organic solvent, the mixture becomes white turbid at 25° C. or becomes a transparent solution once at 25° C. and then becomes white turbid within 12 hours.
    Type: Application
    Filed: January 13, 2011
    Publication date: July 21, 2011
    Inventors: Kazumi Suzuki, Tatsuya Morita
  • Publication number: 20110008723
    Abstract: An electrophotographic toner which is produced by a pulverization method or generated in an aqueous medium, and which includes at least a colorant and a binder reasin, wherein the colorant includes at least a pigment represented by General Formula (1) described below and a fatty acid amide compound, where X and Y are independently selected from the following structures: ?C(CN)—CONH—CH3, ?C(CN)—CONH—(C6H4)—Z, and ?C(CN)—CONH—(C6H3)—Z2, where Z denotes one of an alkyl group having 1 to 4 carbon atoms, an alkoxy group and a halogen atom.
    Type: Application
    Filed: July 7, 2010
    Publication date: January 13, 2011
    Inventors: Tatsuya MORITA, Kazumi Suzuki
  • Publication number: 20100227266
    Abstract: A toner prepared by pulverization methods, including a binder resin; and a colorant, wherein the binder resin is prepared by melting and kneading a polyester resin having an unsaturated bond with a crosslinking reaction initiator diluted with a release agent, and the colorant is a press cake pigment after washed.
    Type: Application
    Filed: February 1, 2010
    Publication date: September 9, 2010
    Inventors: Satoshi OGAWA, Tatsuya Morita
  • Publication number: 20070275315
    Abstract: A toner is provided manufactured by a method including mixing a particulate porous cross-linked resin having pores on a surface thereof and a volume average particle diameter of from 15 to 50 ?m with a pre-toner including a colored particulate material comprising a binder resin, a colorant, and a release agent and an external additive, and removing the particulate porous cross-linked resin; along with a method for manufacturing the above toner, and a developer, an image forming method, an image forming apparatus, and process cartridge using the toner.
    Type: Application
    Filed: May 23, 2007
    Publication date: November 29, 2007
    Inventors: Tsuneyasu Nagatomo, Masayuki Ishii, Hiroshi Yamashita, Yasutada Shitara, Tatsuya Morita
  • Patent number: 5312815
    Abstract: (+)-2-(2,4-Difluorophenyl)-3-methyl-1-(1H-1,2,4-triazol-1-yl)-3-(6-(1H-1,2, 4-triazol-1-yl)pyridazin-3-ylthio)butan-2-ol and a pharmaceutically acceptable salt thereof useful as an antifungal agent are disclosed. An inclusion complex of the compound with cyclodextrin can be given either orally or intravenously and has increased absorption when administered orally.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: May 17, 1994
    Assignee: Roussel Morishita Co., Ltd.
    Inventors: Yuji Tanaka, Teruyuki Yuasa, Yoshinari Kawakami, Kohji Terashima, Tatsuya Morita, Atsushi Nishikawa, Masaji Kawashima