Patents by Inventor Ryota Inoue

Ryota Inoue 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: 9482973
    Abstract: A toner is provided. The toner includes a binder resin and a release agent. The toner satisfies the following inequation: 0.45?(S1/S2)?1.00 wherein S1 and S2 represent areas of quadrangles circumscribing the release agent and the toner, respectively, in a cross-sectional image of the toner obtained by a transmission electron microscope (TEM).
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: November 1, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryota Inoue, Yoshihiro Moriya, Masahiko Ishikawa, Satoshi Takahashi, Tatsuki Yamaguchi
  • Patent number: 9448501
    Abstract: A toner for developing an electrostatic image, which contains: resin particles (C), wherein the resin particles (C) each contain a resin particle (B) and resin particles (A) or a coating film (P) deposited on a surface of the resin particle (B), where the resin particle (B) contains a second resin (b) and a filler (f), wherein the resin particles (A) or the coating film (P) contains a first resin (a), wherein the second resin (b) contains a crystalline resin, and wherein the resin particle (B) contains the filler (f) in an amount of 15% by mass or greater.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: September 20, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryota Inoue, Yoshitaka Sekiguchi, Hiroaki Katoh, Shun Saito
  • Publication number: 20160266521
    Abstract: A toner including a binder resin and a release agent, wherein the toner has a second peak particle diameter in a range of from 1.21 times through 1.31 times as large as a most frequent diameter in a volume basis particle size distribution, and wherein the toner has a particle size distribution (volume average particle diameter/number average particle diameter) in a range of from 1.08 through 1.15.
    Type: Application
    Filed: December 3, 2014
    Publication date: September 15, 2016
    Inventors: Ryota INOUE, Yoshihiro MORIYA, Masahiko ISHIKAWA, Satoshi TAKAHASHI, Tatsuki YAMAGUCHI
  • Publication number: 20160255752
    Abstract: A component mounting method is provided for mounting a light emitting component on a board by picking up the light emitting component from a pocket formed in a carrier tape by a mount head. The method includes recognizing a reference part formed in the board, recognizing a light emitting part of the light emitting component by imaging the light emitting component from above in a state where the light emitting component is held within the pocket by a holder from below, picking up the light emitting component by the mount head in the state where the light emitting component is held within the pocket by the holder from below, and mounting the picked up light emitting component on the board based on a recognition result of the reference part and a recognition result of the light emitting part.
    Type: Application
    Filed: December 29, 2015
    Publication date: September 1, 2016
    Inventors: Ryota Inoue, Naoki Azuma
  • Publication number: 20160255753
    Abstract: A tape feeder is provided for pitch-feeding a carrier tape that holds a component in a pocket of the carrier tape and supplying the component to a pickup position for a mount head. The tape feeder includes a guide section that guides the carrier tape with an upper portion of the carrier tape covered, in a vicinity of the pickup position, and a lower receiving section that is positioned below the guide section and receives the pocket of the carrier tape from a lower surface side of the pocket. The lower receiving section includes a suction section that sucks the component from below and a leaf spring member that allows the suction section to contact a bottom of pocket from the lower surface side of the pocket. The component is sucked and held from below by the suction section through a hole section formed in the bottom of the pocket.
    Type: Application
    Filed: December 29, 2015
    Publication date: September 1, 2016
    Inventors: Ryota INOUE, Naoki AZUMA
  • Publication number: 20160195826
    Abstract: A toner including a binder resin and a release agent, wherein the toner has a component soluble in a 50% by mass aqueous methanol solution in an amount of 0.10% by mass to 0.60% by mass, and wherein the toner has a flowing-out beginning temperature (Tfb) of 55.0° C. to 100.0° C. as determined by a flowtester method.
    Type: Application
    Filed: December 30, 2015
    Publication date: July 7, 2016
    Inventors: Yoshitsugu KIMURA, Ryota INOUE, Masana SHIBA, Daisuke INOUE, Tomoki MURAYAMA, Rintaro TAKAHASHI
  • Publication number: 20160195828
    Abstract: Toner including binder resin; wherein the toner, as measured by differential scanning calorimetry (DSC), has glass transition temperature in range of 40° C. through 70° C. at first temperature rising and has no glass transition temperature in range of X° C. through X?20° C. at second temperature rising where X° C. denotes the glass transition temperature at the first temperature rising, the toner has difference of 30 or less between maximum value and minimum value among peak intensities in range of Molecular weight M±300 where Molecular weight M is molecular weight selected from range of 300 through 5,000 in molecular weight distribution of THF-soluble components in the toner as measured by GPC, and the peak intensities are defined as relative values assuming the maximum peak value in molecular weights of 20,000 or less is 100, in molecular weight distribution curve taking intensity as vertical axis and molecular weight as horizontal axis as measured by GPC.
    Type: Application
    Filed: January 4, 2016
    Publication date: July 7, 2016
    Inventors: Ayumi SATOH, Naohiro WATANABE, Masana SHIBA, Takahiro HONDA, Ryota INOUE, Daisuke INOUE, Shingo SAKASHITA, Rintaro TAKAHASHI
  • Publication number: 20160195827
    Abstract: A toner including a binder resin, wherein a toner extract obtained by drying an extraction liquid obtained through Soxhlet extraction of the toner with tetrahydrofuran (THF) has glass transition temperature Tg in a range of from 35° C. through 55° C., and a moisture-content change rate of the toner extract before and after leaving the toner extract to stand for 3 days in an environment of 40° C. and 70% RH is 0.5% or less, and wherein a specific-surface-area change rate of the toner before and after leaving the toner to stand for 3 days in an environment of 40° C. and 70% RH is in a range of from 15% through 50%.
    Type: Application
    Filed: January 4, 2016
    Publication date: July 7, 2016
    Inventors: Tomoki Murayama, Ryota Inoue, Masana Shiba, Daisuke Inoue, Junichi Awamura, Yoshitsugu Kimura, Rintaro Takahashi
  • Publication number: 20160147167
    Abstract: Provided is a toner obtained by granulating a toner composition in a hydrophobic medium and then drying the granulated product. The toner contains a binder resin. The binder resin includes 2 or more kinds of binder resins having different contact angles (to water). The binder resin having the largest contact angle has a weight average molecular weight of 15,000 or less. The other binder resins have a weight average molecular weight of greater than 15,000.
    Type: Application
    Filed: June 5, 2014
    Publication date: May 26, 2016
    Applicant: Ricoh Company, Ltd.
    Inventors: Tatsuru MORITANI, Yoshihiro MORIYA, Ryota INOUE, Tatsuki YAMAGUCHI
  • Publication number: 20150362852
    Abstract: A toner including a binder resin and a release agent is provided. The binder resin includes an amorphous resin and a crystalline resin. In a cross-sectional image of the toner obtained by a transmission electron microscope, a longest length Lmax of the release agent is equal to or greater than 1.1 times a maximum Feret diameter Df of the toner, and the crystalline resin is dispersed in the amorphous resin forming domains having a maximum Feret diameter Cf of 0.20 ?m or less.
    Type: Application
    Filed: March 26, 2015
    Publication date: December 17, 2015
    Inventors: Yoshihiro MORIYA, Masahiko Ishikawa, Ryota Inoue, Satoshi Takahashi, Tatsuki Yamaguchi
  • Patent number: 9195156
    Abstract: A particulate material production method is provided. The particulate material production method includes ejecting a particulate material composition liquid, which includes an organic solvent and a particulate material composition including at least a resin and dissolved or dispersed in the organic solvent, from at least one nozzle to form droplets of the particulate material composition liquid in a gas phase; and solidifying the droplets of the particulate material composition liquid to prepare particles of the particulate material composition. The droplet solidifying step includes contacting the droplets with a poor solvent for the particulate material composition.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: November 24, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryota Inoue, Yoshihiro Moriya, Hiroshi Yamada, Tatsuru Moritani, Minoru Masuda, Akinori Saito, Yasutada Shitara, Kiyotada Katoh, Satoshi Takahashi
  • Patent number: 9170511
    Abstract: Toner contains a binder resin containing one or more kinds of crystalline resin and one or more kinds of non-crystalline resin. The non-crystalline resin located at the surface portion of the toner forms a shell structure of a continuous phase of the non-crystalline resin and the toner has an amount of melting heat of 30 J/g or more in a second temperature rising as measured by differential scanning calorimetry (DSC).
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: October 27, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuru Moritani, Yoshihiro Moriya, Hiroshi Yamada, Ryota Inoue, Shinya Nakayama, Atsushi Yamamoto
  • Patent number: 9152066
    Abstract: A toner, including: a binder resin; releasing agent-encapsulating capsules; and a colorant, wherein the releasing agent-encapsulating capsules each include: a capsule formed of a resin (I) which is different from the binder resin; and a releasing agent (RA) which is encapsulated in the capsule, and the releasing agent-encapsulating capsules exist in the binder resin, and wherein 50% to 100% of the releasing agent-encapsulating capsules exist in a region from a surface of the toner to a depth of 0.10 times a volume-average particle diameter of the toner.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: October 6, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryota Inoue, Hiroaki Katoh, Masahiro Seki, Shun Saito, Yoshitaka Sekiguchi, Yoshihiro Mikuriya, Kazuoki Fuwa, Satoshi Ogawa, Tomohiro Fukao, Takayuki Nakamura
  • Publication number: 20150261111
    Abstract: A toner is provided. The toner includes a binder resin and a release agent. The toner satisfies the following inequation: 0.45?(S1/S2)?1.00 wherein S1 and S2 represent areas of quadrangles circumscribing the release agent and the toner, respectively, in a cross-sectional image of the toner obtained by a transmission electron microscope (TEM).
    Type: Application
    Filed: February 25, 2015
    Publication date: September 17, 2015
    Inventors: Ryota INOUE, Yoshihiro MORIYA, Masahiko ISHIKAWA, Satoshi TAKAHASHI, Tatsuki YAMAGUCHI
  • Publication number: 20150241804
    Abstract: A toner is provided. The toner includes particles each including a binder resin and a release agent. When the toner is analyzed by a flow particle image analyzer while limiting: 1) a particle diameter analysis range to 1.985 (?m)?equivalent circle diameter (number based)<200.0 (?m); 2) a particle shape analysis range to 0.200?circularity?1.000; and 3) the number of limited particles satisfying the conditions 1) and 2) to from 4,800 to 5,200, an average circularity Rave. satisfies an inequation 0.960?Rave.?0.980, a mode particle diameter ?max satisfies an inequation 4.0 (?m)??max?6.0 (?m), and the number of particles having a particle diameter equal to or less than 0.75 times the mode particle diameter ?max and a circularity equal to or more than 0.980 is 1.0% or less of the number of the limited particles.
    Type: Application
    Filed: February 19, 2015
    Publication date: August 27, 2015
    Inventors: Satoshi TAKAHASHI, Yoshihiro MORIYA, Ryota INOUE, Masahiko ISHIKAWA, Tatsuki YAMAGUCHI
  • Publication number: 20150234303
    Abstract: A toner is provided. The toner includes a binder resin and a release agent. The release agent has an average aspect ratio of 31 or more, when the average aspect ratio is determined from cross-sectional images of the toner observed with a transmission electron microscope (TEM).
    Type: Application
    Filed: February 6, 2015
    Publication date: August 20, 2015
    Inventors: Yoshihiro MORIYA, Masahiko ISHIKAWA, Ryota INOUE, Satoshi TAKAHASHI, Tatsuki YAMAGUCHI
  • Publication number: 20140363209
    Abstract: A toner for developing an electrostatic image, which contains: resin particles (C), wherein the resin particles (C) each contain a resin particle (B) and resin particles (A) or a coating film (P) deposited on a surface of the resin particle (B), where the resin particle (B) contains a second resin (b) and a filler (f), wherein the resin particles (A) or the coating film (P) contains a first resin (a), wherein the second resin (b) contains a crystalline resin, and wherein the resin particle (B) contains the filler (f) in an amount of 15% by mass or greater.
    Type: Application
    Filed: February 7, 2013
    Publication date: December 11, 2014
    Inventors: Ryota Inoue, Yoshitaka Sekiguchi, Hiroaki Katoh, Shun Saito
  • Patent number: 8877420
    Abstract: A method for producing particles, including: bringing a compressive fluid into contact with a pressure plastic material, so as to plasticize the pressure plastic material; applying a shear force to the compressive fluid and the plasticized pressure plastic material, between which an interface exists, in the presence of a surfactant to granulate the pressure plastic material in the compressive fluid, so as to produce particles.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: November 4, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Chiaki Tanaka, Ryota Inoue, Taichi Nemoto, Yoshitaka Yamauchi
  • Patent number: 8852836
    Abstract: A toner including: a base resin; and charge-controlling resin particles contained in the base resin, wherein the toner is in shape of particles, and the charge-controlling resin particles are present in a region of each toner particle which is 500 nm in depth from a surface of the toner particle and an average of amounts of the charge-controlling resin particles present in the regions of the toner particles is 20% by volume to 70% by volume, wherein an average of embedment rates of the charge-controlling resin particles in the toner particles is 90% or higher, where each embedment rate is an average of embedment rates of the charge-controlling resin particles in each toner particle, and wherein the charge-controlling resin particles have a charge amount of 60 ?C/m2 or more as measured by a blow-off method.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: October 7, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Seki, Yoshitaka Sekiguchi, Ryota Inoue, Kazuoki Fuwa
  • Publication number: 20140272695
    Abstract: Toner contains a binder resin containing one or more kinds of crystalline resin and one or more kinds of non-crystalline resin. The non-crystalline resin located at the surface portion of the toner forms a shell structure of a continuous phase of the non-crystalline resin and the toner has an amount of melting heat of 30 J/g or more in a second temperature rising as measured by differential scanning calorimetry (DSC).
    Type: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Inventors: Tatsuru MORITANI, Yoshihiro MORIYA, Hiroshi YAMADA, Ryota INOUE, Shinya NAKAYAMA, Atsushi YAMAMOTO