Patents by Inventor Kazumi Suzuki

Kazumi Suzuki 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).

  • TONER, TONER HOUSING UNIT, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD
    Publication number: 20170139337
    Abstract: A toner includes a binder resin; and a plate-shaped pigment having a silica coated layer on the surface, an average-particle diameter of from 10 ?m to 25 ?m, and an aspect ratio of from 20 to 125.
    Type: Application
    Filed: October 31, 2016
    Publication date: May 18, 2017
    Inventors: Akihiro KANEKO, Kazumi Suzuki, Yoshitaka Yamauchi, Yu Naito
  • Resin composition for toner, toner, developer and image forming apparatus
    Patent number: 9606464
    Abstract: A resin composition for a toner including a polyester resin and a colorant, wherein the polyester resin has A(10)-A(180) of 70 or greater, where A(10) (%) is a transmittance of light having a wavelength of 500 nm through a mixture of 20 parts by mass of the polyester resin added to 80 parts by mass of ethyl acetate and stirred at 25° C. for 10 minutes, and A(180) (%) is the transmittance after the mixture is left to stand for 3 hours.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: March 28, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshitaka Yamauchi, Kazumi Suzuki, Tatsuya Morita, Hiroshi Yamashita, Tsuyoshi Sugimoto, Daisuke Asahina
  • TONER FOR ELECTROPHOTOGRAPHY, IMAGE FORMING METHOD, AND PROCESS CARTRIDGE
    Publication number: 20160327884
    Abstract: A toner for electrophotography, which contains a binder resin, and a release agent, wherein a maximum value of loss tangent of the toner at 95° C. to 115° C. is 8 or greater, as a viscoelasticity of the toner is measured, where the loss tangent is represented by the following formula: Loss tangent (tan ?)=loss elastic modulus (G?)/storage elastic modulus (G?).
    Type: Application
    Filed: January 6, 2015
    Publication date: November 10, 2016
    Inventors: Hisashi NAKAJIMA, Kazumi SUZUKI, Masashi NAGAYAMA, Saori YAMADA, Yoshitaka YAMAUCHI, Yu NAITO, Yoshitaka SEKIGUCHI
  • White toner, and image forming method and image forming apparatus using the white toner
    Patent number: 9482971
    Abstract: A white toner has a first temperature range not less than 25° C. in which 60° glossiness is 10 or less between a fixable minimum temperature and a fixable maximum temperature thereof. The white toner has a second temperature range not less than 25° C. in which 60° glossiness is from 30 to 60 therebetween.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: November 1, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazumi Suzuki, Hisashi Nakajima, Masashi Nagayama, Saori Yamada, Yoshitaka Yamauchi, Yu Naito
  • Toner, developer, image forming apparatus, and process cartridge
    Patent number: 9482975
    Abstract: Provided is a toner including a crystalline resin and a non-crystalline resin. In a reflected electron image of a cross-section of the toner stained by ruthenium tetroxide captured by a scanning electron microscope, the ratio of regions stained by ruthenium tetroxide is from 50 area % to 80 area %. In a reflected electron image of the surface of the toner stained by ruthenium tetroxide captured by a scanning electron microscope, the ratio of regions stained by ruthenium tetroxide is from 10 area % to 40 area %.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: November 1, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshitaka Yamauchi, Kazumi Suzuki
  • Toner, method of manufacturing the toner, and developer, image forming apparatus, image forming method, and process cartridge using the toner
    Patent number: 9470996
    Abstract: A toner is provided. The toner includes a core particle, a second shell layer overlying the core particle, and a first shell layer overlying the second shell layer and constituting an outermost layer. The second shell layer includes a crystalline resin, and the first shell layer includes an amorphous resin.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: October 18, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshitaka Yamauchi, Kazumi Suzuki
  • Toner, developer, and image forming apparatus
    Patent number: 9442403
    Abstract: Provided is a toner, including: a crystalline resin; and a colorant, wherein the toner has a sea island structure in which a crystal region containing the crystalline resin is formed as a sea, and a non-crystalline region containing the colorant is formed as an island.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: September 13, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Azumi Miyaake, Kazumi Suzuki, Masana Shiba, Tatsuya Morita, Yoshitaka Yamauchi
  • Toner, two-component developer, toner set, toner container, printed matter, image forming apparatus, and image forming method
    Patent number: 9360780
    Abstract: To provide a toner, containing: a noncrystalline resin; and a crystalline resin, wherein the crystalline resin has a weight average molecular weight of 100,000 to 180,000, wherein a temperature range of the toner, within which a loss tangent (tan ?) as measured by a dynamic viscoelasticity measurement is 6 or greater, is 20° C. or greater, and wherein a fixed toner image has 60° glossiness of 30 to 50, where the fixed toner image is obtained by forming an unfixed toner image having a deposition amount of 0.4 mg/cm2 on a recording medium having 60° glossiness of 30 for a measurement, and fixing at temperature at which temperature of the toner image is a lowest temperature of the temperature range +10° C., at 0.15 MPa, for a nipping duration of 50 msec.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: June 7, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazumi Suzuki, Yoshitaka Yamauchi
  • Electrophotographic toner, two-component developer containing toner, and image forming apparatus
    Patent number: 9354533
    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: Grant
    Filed: September 17, 2013
    Date of Patent: May 31, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Rintaro Takahashi, Kazumi Suzuki, Masana Shiba, Tatsuya Morita, Yoshitaka Yamauchi, Azumi Miyaake
  • Toner, method for producing the toner, two-component developer, and image forming apparatus
    Patent number: 9348245
    Abstract: A toner, including: a crystalline resin; a non-crystalline resin; and a colorant, wherein the toner has a sea-island structure which includes a sea containing the crystalline resin and an island containing the non-crystalline resin and the colorant, wherein the island is 1.0 ?m or less in domain diameter, and wherein the toner is 1.7×104 Pa or less in storage elastic modulus at 160° C.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: May 24, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Morita, Kazumi Suzuki, Shingo Sakashita, Masana Shiba, Taichi Nemoto, Yoshitaka Yamauchi, Azumi Miyaake, Rintaro Takahashi
  • PROJECTOR AND CONTROL METHOD
    Publication number: 20150339092
    Abstract: A projector includes a plurality of transmitters each of which transmits a signal, a receiver that receives signals transmitted from another projector, and a control unit that achieves synchronization of the signals between the projector and the another projector based on the signals transmitted from the another projector and received by the receiver. The control unit includes a state judgment portion that judges whether or not the synchronization with the another projector is stable and a number determination portion that determines the number of transmitters to be used among the plurality of transmitters based on the judgment result made by the state judgment portion.
    Type: Application
    Filed: March 7, 2014
    Publication date: November 26, 2015
    Inventor: Kazumi SUZUKI
  • TONER, METHOD OF MANUFACTURING THE TONER, AND DEVELOPER, IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND PROCESS CARTRIDGE USING THE TONER
    Publication number: 20150253688
    Abstract: A toner is provided. The toner includes a core particle, a second shell layer overlying the core particle, and a first shell layer overlying the second shell layer and constituting an outermost layer. The second shell layer includes a crystalline resin, and the first shell layer includes an amorphous resin.
    Type: Application
    Filed: February 11, 2015
    Publication date: September 10, 2015
    Inventors: Yoshitaka YAMAUCHI, Kazumi SUZUKI
  • WHITE TONER, AND IMAGE FORMING METHOD AND IMAGE FORMING APPARATUS USING THE WHITE TONER
    Publication number: 20150253685
    Abstract: A white toner has a first temperature range not less than 25° C. in which 60° glossiness is 10 or less between a fixable minimum temperature and a fixable maximum temperature thereof. The white toner has a second temperature range not less than 25° C. in which 60° glossiness is from 30 to 60 therebetween.
    Type: Application
    Filed: February 18, 2015
    Publication date: September 10, 2015
    Inventors: Kazumi SUZUKI, Hisashi NAKAJIMA, Masashi NAGAYAMA, Saori YAMADA, Yoshitaka YAMAUCHI, Yu NAITO
  • RED TONER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE, DEVELOPER AND IMAGE FORMING APPARATUS
    Publication number: 20150248074
    Abstract: A red toner for developing an electrostatic latent image includes a colorant and a binder resin. An image produced by the red toner has a hue angle (H) of from 36 to 50° in L*a*b* color system, a lightness (L*) of from 47 to 55, and a chroma (c*) of from 94 to 108.
    Type: Application
    Filed: February 18, 2015
    Publication date: September 3, 2015
    Inventors: Kazumi Suzuki, Hisashi Nakajima, Masashi Nagayama, Saori Yamada, Yoshitaka Yamauchi, Yu Naito
  • TONER, DEVELOPER, AND IMAGE FORMING APPARATUS
    Publication number: 20150220011
    Abstract: Provided is a toner, including: a crystalline resin; and a colorant, wherein the toner has a sea island structure in which a crystal region containing the crystalline resin is formed as a sea, and a non-crystalline region containing the colorant is formed as an island.
    Type: Application
    Filed: August 30, 2013
    Publication date: August 6, 2015
    Inventors: Azumi Miyaake, Kazumi Suzuki, Masana Shiba, Tatsuya Morita, Yoshitaka Yamauchi
  • TONER, DEVELOPER, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE
    Publication number: 20150212444
    Abstract: Provided is a toner including a crystalline resin and a non-crystalline resin. In a reflected electron image of a cross-section of the toner stained by ruthenium tetroxide captured by a scanning electron microscope, the ratio of regions stained by ruthenium tetroxide is from 50 area % to 80 area %. In a reflected electron image of the surface of the toner stained by ruthenium tetroxide captured by a scanning electron microscope, the ratio of regions stained by ruthenium tetroxide is from 10 area % to 40 area %.
    Type: Application
    Filed: September 12, 2013
    Publication date: July 30, 2015
    Inventors: Yoshitaka Yamauchi, Kazumi Suzuki
  • RESIN COMPOSITION FOR TONER, TONER, DEVELOPER AND IMAGE FORMING APPARATUS
    Publication number: 20150153671
    Abstract: A resin composition for a toner including a polyester resin and a colorant, wherein the polyester resin has A(10)-A(180) of 70 or greater, where A(10) (%) is a transmittance of light having a wavelength of 500 nm through a mixture of 20 parts by mass of the polyester resin added to 80 parts by mass of ethyl acetate and stirred at 25° C. for 10 minutes, and A(180) (%) is the transmittance after the mixture is left to stand for 3 hours.
    Type: Application
    Filed: June 13, 2013
    Publication date: June 4, 2015
    Inventors: Yoshitaka Yamauchi, Kazumi Suzuki, Tatsuya Morita, Hiroshi Yamashita, Tsuyoshi Sugimoto, Daisuke Asahina
  • White toner, method for producing the same, and development agent, recording medium, printed matter, and image forming apparatus using the same
    Patent number: 9012113
    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: Grant
    Filed: May 31, 2013
    Date of Patent: April 21, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazumi Suzuki, Tatsuya Morita, Yoshitaka Yamauchi, Masana Shiba, Azumi Miyaake
  • Stable pharmaceutical composition
    Patent number: 9006225
    Abstract: A pharmaceutical composition which includes a compound represented by the general formula (I): or a salt thereof, and a pharmaceutically acceptable carrier, wherein the composition does not substantially contain a reducing sugar and/or a carrier containing a reducing sugar as an ingredient as the pharmaceutically acceptable carrier, or when the composition contains a reducing sugar and/or a carrier containing a reducing sugar as an ingredient as the pharmaceutically acceptable carrier, contact of the reducing sugar and the compound represented by the general formula (I) or a salt thereof is eliminated.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: April 14, 2015
    Assignee: Asahi Kasei Pharma Corporation
    Inventor: Kazumi Suzuki
  • TONER, METHOD FOR PRODUCING THE TONER, TWO-COMPONENT DEVELOPER, AND IMAGE FORMING APPARATUS
    Publication number: 20150037718
    Abstract: A toner, including: a crystalline resin; a non-crystalline resin; and a colorant, wherein the toner has a sea-island structure which includes a sea containing the crystalline resin and an island containing the non-crystalline resin and the colorant, wherein the island is 1.0 ?m or less in domain diameter, and wherein the toner is 1.7×104 Pa or less in storage elastic modulus at 160° C.
    Type: Application
    Filed: March 7, 2013
    Publication date: February 5, 2015
    Inventors: Tatsuya Morita, Kazumi Suzuki, Shingo Sakashita, Masana Shiba, Taichi Nemoto, Yoshitaka Yamauchi, Azumi Miyaake, Rintaro Takahashi