Patents by Inventor Saori Yamada

Saori Yamada 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).

  • Patent number: 11424402
    Abstract: The present invention addresses the problem of providing a bimorph-type piezoelectric film that is less susceptible to the influence of pyroelectric noise resulting from temperature changes, and that makes it possible to provide a pressure-sensitive sensor or the like. The present invention provides a bimorph-type piezoelectric film comprising a first pyroelectric film having piezoelectric anisotropy in an in-plane direction, and a second pyroelectric film having piezoelectric anisotropy in an in-plane direction, the first pyroelectric film and the second pyroelectric film being disposed in such a manner that their surfaces on which electric charges of the same polarity are generated by a temperature increase are each outward-facing.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: August 23, 2022
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Tetsuhiro Kodani, Saori Sakami, Hiroyuki Sagami, Takaya Yamada, Shinya Bitou, Eri Mukai, Takashi Kanemura
  • Patent number: 11106150
    Abstract: A carrier for forming an electrophotographic image is provided. The carrier includes a core particle comprising a manganese-based ferrite particle having an apparent density of from 2.0 to 2.2 g/cm3 and a magnetization of from 44 to 52 emu/g in a magnetic field of 500 Oe; and a coating layer coating a surface of the core particle. The coating layer contains a carbon black, an inorganic particle A, and an inorganic particle B. The inorganic particle A and the carbon black each have a concentration gradient in a thickness direction of the coating layer. A concentration of the inorganic particle A increases toward a surface of the coating layer, and a concentration of the carbon black decreases toward the surface of the coating layer.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: August 31, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Masashi Nagayama, Hiroyuki Kishida, Masahiro Seki, Yoshimichi Ishikawa, Saori Yamada
  • Publication number: 20200166867
    Abstract: A carrier for forming an electrophotographic image is provided. The carrier includes a core particle comprising a manganese-based ferrite particle having an apparent density of from 2.0 to 2.2 g/cm3 and a magnetization of from 44 to 52 emu/g in a magnetic field of 500 Oe; and a coating layer coating a surface of the core particle. The coating layer contains a carbon black, an inorganic particle A, and an inorganic particle B. The inorganic particle A and the carbon black each have a concentration gradient in a thickness direction of the coating layer. A concentration of the inorganic particle A increases toward a surface of the coating layer, and a concentration of the carbon black decreases toward the surface of the coating layer.
    Type: Application
    Filed: November 14, 2019
    Publication date: May 28, 2020
    Inventors: Masashi NAGAYAMA, Hiroyuki KISHIDA, Masahiro SEKI, Yoshimichi ISHIKAWA, Saori YAMADA
  • Patent number: 10578988
    Abstract: A toner, where a diffraction peak of the toner as measured by X-ray diffraction spectroscopy is present at least in a region where 2? is from 20° through 25°, and a difference between Tg1 and Tg2 is 10° C. or less, where Tg1 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of a differential scanning calorimeter (DSC) under the heating and cooling conditions 1 defined in the specification, and Tg2 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of the differential scanning calorimeter (DSC) under the heating and cooling conditions 2 defined in the specification.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: March 3, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshitaka Yamauchi, Kazumi Suzuki, Hisashi Nakajima, Saori Yamada, Yu Naito, Akihiro Kaneko
  • Publication number: 20190381942
    Abstract: A console box includes a unit, an exterior cover that has an opening into which the unit is fitted, and a fixing mechanism, in which the unit has an engagement piece provided at one end side, and a first through hole provided in the other end side, the exterior cover has a hole which is located on one end side of the opening and into which the engagement piece is inserted, and a second through hole provided at a position of the first through hole in a state where the unit is fitted into the opening at the other end side of the opening, the opening is inclined to cause one end side to be lower than the other end side, the fixing mechanism has an operation portion which is exposed to an external.
    Type: Application
    Filed: September 5, 2018
    Publication date: December 19, 2019
    Inventors: Wataru ISAKA, Takeo MANABE, Saori YAMADA
  • Patent number: 10274856
    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: Grant
    Filed: January 6, 2015
    Date of Patent: April 30, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Hisashi Nakajima, Kazumi Suzuki, Masashi Nagayama, Saori Yamada, Yoshitaka Yamauchi, Yu Naito, Yoshitaka Sekiguchi
  • Patent number: 10254674
    Abstract: A carrier for a developer of an electrostatic latent image, the carrier including: core particles having magnetism; and a coating layer coating a surface of each of the core particles, wherein the coating layer includes two or more kinds of inorganic particles, at least one kind of inorganic particles among the two or more kinds of inorganic particles is inorganic particles A having conductivity and a peak particle diameter of from 300 nm through 1,000 nm, and surface roughness of the carrier calculated by Formula 1 below is from 1.10 m2/g through 1.90 m2/g, C?F??Formula 1 where C is a BET specific surface area (m2/g) of the carrier and F is a BET specific surface area (m2/g) of the core particles.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: April 9, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Seki, Hiroyuki Kishida, Haruki Murata, Shinya Nakagawa, Kei Niwayama, Saori Yamada, Kohsuke Miyazaki
  • Patent number: 10203620
    Abstract: Toner contains a binder resin, a releasing agent, and a tri- or higher metal salt, wherein the toner has a weight average molecular weight (Mw) of from 7,000 to 10,000, a ratio of the weight average molecular weight (Mw) to a number average molecular weight (Mn) of 5 or less, and an acid value of from 6 mgKOH/g to 12 mgKOH/g, wherein the binder resin is a polyester resin, wherein the releasing agent is a monoester wax.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: February 12, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Yu Naito, Kazumi Suzuki, Yoshitaka Yamauchi, Masashi Nagayama, Hisashi Nakajima, Saori Yamada
  • Patent number: 10025214
    Abstract: Carrier for image forming includes a core material particle including a magnetic material and a coating layer disposed on the surface of the core material particle, the coating layer including a resin, carbon black, an inorganic particulate A, and an inorganic particulate B. The carbon black has a concentration gradient along a thickness direction of the coating layer with a concentration from high to low toward a surface of the coating layer while the inorganic particulate A has a concentration gradient along a thickness direction of the coating layer with a concentration from low to high toward the surface of the coating layer. The volume ratio of the carbon black is 0-30 percent at a depth range of 0.0-0.1 ?m from the surface of the coating layer. The inorganic particulate A is electroconductive with a powder specific resistance of 200 ?·cm or less.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: July 17, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Masashi Nagayama, Mariko Takii, Yoshihiro Murasawa, Haruki Murata, Kei Niwayama, Tohru Suganuma, Koichi Sakata, Saori Yamada, Shinya Nakagawa, Kohsuke Miyazaki
  • Publication number: 20180113393
    Abstract: A carrier for a developer of an electrostatic latent image, the carrier including: core particles having magnetism; and a coating layer coating a surface of each of the core particles, wherein the coating layer includes two or more kinds of inorganic particles, at least one kind of inorganic particles among the two or more kinds of inorganic particles is inorganic particles A having conductivity and a peak particle diameter of from 300 nm through 1,000 nm, and surface roughness of the carrier calculated by Formula 1 below is from 1.10 m2/g through 1.90 m2/g, C?F??Formula 1 where C is a BET specific surface area (m2/g) of the carrier and F is a BET specific surface area (m2/g) of the core particles.
    Type: Application
    Filed: October 12, 2017
    Publication date: April 26, 2018
    Inventors: Masahiro SEKI, Hiroyuki Kishida, Haruki Murata, Shinya Nakagawa, Kei Niwayama, Saori Yamada, Kohsuke Miyazaki
  • Publication number: 20180113391
    Abstract: A toner, where a diffraction peak of the toner as measured by X-ray diffraction spectroscopy is present at least in a region where 2? is from 20° through 25°, and a difference between Tg1 and Tg2 is 10° C. or less, where Tg1 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of a differential scanning calorimeter (DSC) under the heating and cooling conditions 1 defined in the specification, and Tg2 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of the differential scanning calorimeter (DSC) under the heating and cooling conditions 2 defined in the specification.
    Type: Application
    Filed: March 24, 2016
    Publication date: April 26, 2018
    Inventors: Yoshitaka YAMAUCHI, Kazumi SUZUKI, Hisashi NAKAJIMA, Saori YAMADA, Yu NAITO, Akihiro KANEKO
  • Publication number: 20170185000
    Abstract: Carrier for image forming includes a core material particle including a magnetic material and a coating layer disposed on the surface of the core material particle, the coating layer including a resin, carbon black, an inorganic particulate A, and an inorganic particulate B. The carbon black has a concentration gradient along a thickness direction of the coating layer with a concentration from high to low toward a surface of the coating layer while the inorganic particulate A has a concentration gradient along a thickness direction of the coating layer with a concentration from low to high toward the surface of the coating layer. The volume ratio of the carbon black is 0-30 percent at a depth range of 0.0-0.1 ?m from the surface of the coating layer. The inorganic particulate A is electroconductive with a powder specific resistance of 200 ?·cm or less.
    Type: Application
    Filed: December 28, 2016
    Publication date: June 29, 2017
    Inventors: Masashi NAGAYAMA, Mariko TAKll, Yoshihiro MURASAWA, Haruki MURATA, Kei NIWAYAMA, Tohru SUGANUMA, Koichi SAKATA, Saori YAMADA, Shinya NAKAGAWA, Kohsuke MIYAZAKI
  • 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
  • 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
  • Patent number: 9348259
    Abstract: A toner housing container includes a container body housing a toner; a conveying portion conveying the toner from one end of the container body, in a longer direction of the container body, to its other end at which a container opening portion is provided; a pipe receiving port receiving a conveying pipe fixed to a toner conveying device; and an uplifting portion moving the toner toward a toner receiving port of conveying pipe. Such toner has a molecular weight distribution having a peak in a range of 103 to 104, and has C/R of from 0.03 to 0.55 between peak height C attributed to crystalline polyester resin and R attributed to non-crystalline resin when measured by FT-IR after stored at 45° C. for 12 hours.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: May 24, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Masashi Nagayama, Hisashi Nakajima, Yoshitaka Sekiguchi, Saori Yamada, Shinya Hanatani, Mariko Takii, Hiroshi Hosokawa, Shunji Katoh, Shinji Tamaki, Hiroshi Ikeguchi, Kenji Kikuchi, Michiharu Suzuki
  • Patent number: 9182694
    Abstract: A toner, including: a binder resin; and a colorant, wherein the binder resin contains: a crystalline polyester resin (A); a non-crystalline resin (B); and a composite resin (C), where the composite resin (C) contains a condensation polymerization resin unit and an addition polymerization resin unit, wherein the toner contains chloroform insoluble matter in an amount of 1% by mass to 30% by mass, wherein the toner has a molecular weight distribution having a main peak in a range of 1,000 to 10,000 and a half width of 15,000 or less, where the molecular weight distribution is obtained through gel permeation chromatography (GPC) of tetrahydrofuran soluble matter of the toner, and wherein the toner has an endothermic peak in a range of 90° C. to 130° C. in measurement through differential scanning calorimetry (DSC).
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: November 10, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Saori Yamada, Hisashi Nakajima, Masashi Nagayama, Shinya Hanatani, Mariko Takii, Yoshitaka Sekiguchi
  • 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
  • Patent number: 9128398
    Abstract: A toner for forming an electrophotographic image is provided, wherein the toner includes at least four types of binder resins, wherein the binder resins includes at least: a crystalline polyester resin (A); a non-crystalline resin (B); a non-crystalline resin (C); and a composite resin (D) which includes a condensation polymerization resin unit and an addition polymerization resin unit, wherein the non-crystalline resin (B) includes a chloroform insoluble matter, wherein the non-crystalline resin (C) has a softening temperature (T½) lower than that of the non-crystalline resin (B) by 25° C. or more, and wherein the toner has a main peak between 1,000 to 10,000 in a molecular weight distribution obtained by GPC from a tetrahydrofuran soluble matter, and the toner has a half-value width of the molecular weight distribution of 15,000 or less.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: September 8, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Masashi Nagayama, Mitsuo Aoki, Hisashi Nakajima, Saori Yamada, Mariko Takii
  • 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
  • Patent number: 9029061
    Abstract: A carrier for use in a two component developer for developing an electrostatic latent image is provided. The carrier includes a particulate core material; and a cover layer located on a surface of the core material and including a silicone resin and barium sulfate. The cover layer includes Ba and Si at an atomic ratio of from 0.01 to 0.08 as determined by X-ray photoelectron spectroscopy.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: May 12, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Koichi Sakata, Minoru Masuda, Hisashi Nakajima, Kimitoshi Yamaguchi, Yutaka Takahashi, Hitoshi Iwatsuki, Saori Yamada, Toyoaki Tano