Patents by Inventor Junichi Tamura

Junichi Tamura 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: 11980948
    Abstract: Provided is a rotary tool with a compact tip tool holding portion (80). The rotary tool is provided with a sleeve (81) attached to an output shaft (41) to switch a tip tool (70) between a fixed state and a detachable state. The output shaft (41) has a through hole (46) formed therein radially penetrating from the inside to the outside of a mounting hole thereof. The through hole (46) has a steel ball (85) provided therein such that at least a part of the steel ball (85) overlaps at least a part of a case (10). The sleeve (81) defines a first position in the outward direction of the steel ball (85), while the case (10) regulates a second position on the radially outer side of the first position.
    Type: Grant
    Filed: November 27, 2020
    Date of Patent: May 14, 2024
    Assignee: Koki Holdings Co., Ltd.
    Inventors: kengo Tamura, Junichi Toukairin, Shota Takeuchi
  • Patent number: 11835919
    Abstract: A toner classification apparatus comprising a classification rotor, wherein the classification rotor comprises a first vane group containing first vanes and a second vane group containing second vanes, the second vanes have a length shorter than the first vane group; the number of second vanes, which are disposed between two adjacent first vanes, is 1 to 2, independently; each of the first vanes draws first trajectory and each of the second vanes draws second trajectory when the classification rotor rotates, a distance from the center of rotation to an outer circumference side end of the first and second trajectory are defined as L1 and L3, respectively, and a distance from the center of rotation to the center side end of the first and second trajectory are defined as L2 and L4, respectively, L1 to L4 satisfy prescribed relationships, and a toner production method using the toner classification apparatus.
    Type: Grant
    Filed: November 23, 2021
    Date of Patent: December 5, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daisuke Yamashita, Junichi Tamura, Ran Wakayama, Katsuyuki Katoh, Yuichi Mizo
  • Patent number: 11835875
    Abstract: A toner classification apparatus comprising a classification rotor in which the classification rotor has a vane A which extends from a rotation center direction of the classification rotor to an outer circumference direction thereof and a vane B having a length longer than that of the vane A, the vane A, and the vane B are disposed so as to satisfy a predetermined relationship, and a toner production method comprising a classification step of carrying out a classification process on particles to be classified by using the toner classification apparatus.
    Type: Grant
    Filed: August 18, 2022
    Date of Patent: December 5, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daisuke Yamashita, Junichi Tamura, Ran Wakayama, Katsuyuki Katoh
  • Patent number: 11829102
    Abstract: Toner classification apparatus comprising classification rotor comprising a plurality of vanes extending from rotation center side of classification rotor to outer circumference side of classification rotor; the plurality of vanes are disposed with prescribed gaps established between vanes; gaps form opening facing rotation center region of classification rotor; each of vanes is disposed such that portion of vane away from of center of rotation of classification rotor is located on more upstream side in a direction of rotation of classification rotor than portion of vane closer to center of rotation of classification rotor; each of vanes has elbow; and in a horizontal cross section provided by sectioning classification rotor in a rotational axis perpendicular direction of classification rotor, shape of vane satisfies prescribed formulae, as well as toner production method comprising classification step of carrying out classification process on particles to be classified by using toner classification apparatus
    Type: Grant
    Filed: June 10, 2021
    Date of Patent: November 28, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daisuke Yamashita, Yuichi Mizo, Junichi Tamura, Ran Wakayama, Yutaro Yoshida
  • Publication number: 20230375953
    Abstract: Provided is a toner that expresses all of low-temperature fixability, transferability, and scratch resistance at high levels. The toner is a toner including a toner particle containing a binder resin, a wax, and an inorganic fine particle, wherein when an outflow start temperature measured with the toner is represented by T1 (° C.), the inorganic fine particle always has a thermal expansion coefficient of ?0.1×10?6 (/K) or less in a temperature range of from 30° C. or more to T1° C. or less, the thermal expansion coefficient being determined by X-ray diffraction and wherein a content of the wax is 3.0 mass % or more and 20.0 mass % or less with respect to a mass of the toner particle.
    Type: Application
    Filed: May 11, 2023
    Publication date: November 23, 2023
    Inventors: JUNICHI TAMURA, YOSUKE IWASAKI, TAKESHI OHTSU, RYUJI OKAMURA, DAISUKE YAMASHITA, KOH ISHIGAMI
  • Patent number: 11762307
    Abstract: A toner having a toner particle containing a binder resin and a styrene-acrylic resin, the toner being characterized in that the styrene-acrylic resin is a graft polymer having an aliphatic hydrocarbon compound segment and a styrene-acrylic segment, the styrene-acrylic segment has a specific monomer unit, the melting point of the styrene-acrylic segment is from 30° C. to 80° C., and when the toner is measured using a FT-IR ATR method, the intensity assigned to the styrene-acrylic resin and the intensity assigned to the binder resin satisfy a specific relationship.
    Type: Grant
    Filed: August 7, 2020
    Date of Patent: September 19, 2023
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Junichi Tamura, Takaho Shibata, Ryuji Murayama, Kenta Mitsuiki, Megumi Shino, Hironori Minagawa
  • Publication number: 20230245459
    Abstract: A bed system includes: an imaging device; a bed on which the imaging device is to be installed; and a controller configured to process an image acquired by the imaging device to predict a possibility of overturning of a user, in which, when it is determined that a state of the user is a first state, the controller predicts the possibility of overturning of the user based on a first parameter, when it is determined that the state of the user is a second state, the controller predicts the possibility of overturning of the user based on a second parameter, the first state is a state of the user different from the second state, and the first parameter is different from the second parameter.
    Type: Application
    Filed: April 12, 2023
    Publication date: August 3, 2023
    Inventors: Mao YOSHIDA, Takeshi NAGAYASU, Yosuke YAMAZAKI, Junichi TAMURA
  • Publication number: 20230168597
    Abstract: A method for manufacturing a toner including supplying powder particles containing a binder resin via a plurality of powder-particle supplying units to a treating chamber, the treating chamber having a cylindrical inner peripheral surface, heat treating the powder particles in the treating chamber by supplying hot air into the treating chamber, wherein a temperature of the hot air supplied into the treating chamber is 100.0° C. or higher and 200.0° C. or lower, and adjusting a humidity of the hot air so that a relative humidity of the hot air supplied into the treating chamber is 3.0% or more and 80.0% or less.
    Type: Application
    Filed: November 22, 2022
    Publication date: June 1, 2023
    Inventors: Takeshi Ohtsu, Junichi Tamura, Yosuke Iwasaki, Ryuji Okamura, Daisuke Yamashita
  • Patent number: 11657615
    Abstract: A bed system includes: an imaging device; a bed on which the imaging device is to be installed; and a controller configured to process an image acquired by the imaging device to predict a possibility of overturning of a user, in which, when it is determined that a state of the user is a first state, the controller predicts the possibility of overturning of the user based on a first parameter, when it is determined that the state of the user is a second state, the controller predicts the possibility of overturning of the user based on a second parameter, the first state is a state of the user different from the second state, and the first parameter is different from the second parameter.
    Type: Grant
    Filed: May 21, 2021
    Date of Patent: May 23, 2023
    Assignee: PARAMOUNT BED CO., LTD.
    Inventors: Mao Yoshida, Takeshi Nagayasu, Yosuke Yamazaki, Junichi Tamura
  • Publication number: 20230083576
    Abstract: A toner classification apparatus comprising a classification rotor in which the classification rotor has a vane A which extends from a rotation center direction of the classification rotor to an outer circumference direction thereof and a vane B having a length longer than that of the vane A, the vane A, and the vane B are disposed so as to satisfy a predetermined relationship, and a toner production method comprising a classification step of carrying out a classification process on particles to be classified by using the toner classification apparatus.
    Type: Application
    Filed: August 18, 2022
    Publication date: March 16, 2023
    Inventors: Daisuke Yamashita, Junichi Tamura, Ran Wakayama, Katsuyuki Katoh
  • Publication number: 20220252995
    Abstract: A magnetic toner comprising a toner particle comprising a binder resin and magnetic iron oxide particles, wherein a content of the magnetic iron oxide particles in the magnetic toner is 30 to 45 mass %, the magnetic iron oxide particles contain (i) spherical magnetic iron oxide particles and (ii) at least one selected from the group consisting of hexahedral magnetic iron oxide particles and octahedral magnetic iron oxide particles, and a content of the spherical magnetic iron oxide particles in the magnetic iron oxide particles is 1.0 to 9.0% by number.
    Type: Application
    Filed: January 21, 2022
    Publication date: August 11, 2022
    Inventors: Daisuke Tsujimoto, Koh Ishigami, Junichi Tamura, Hiroki Watanabe
  • Publication number: 20220242676
    Abstract: [Problem] There is provided a goods inspection device making it possible to make a diagnosis easily for inspection function failure caused by dynamic behavior of goods attributed to a conveyance subsystem of an inspection line. [Solution] The goods inspection device 1 that inspects goods being carried on an inspection line includes a diagnosis unit 25c that diagnoses a conveyance subsystem of the inspection line, based on data of acceleration and angular velocity obtained with respect to respective axial directions from a test object 2 when the test object 2 having a motion sensor 12 to detect acceleration and angular velocity with respect to respective directions of three-dimensional axes is carried.
    Type: Application
    Filed: May 18, 2020
    Publication date: August 4, 2022
    Applicant: ANRITSU CORPORATION
    Inventors: Junichi TAMURA, Hirotaka ANZAI, Hitoshi KOMIYAMA
  • Publication number: 20220197163
    Abstract: To provide a toner having both low temperature fixability and hot offset resistance and having excellent scratch resistance of a fixed image. A toner including a toner particle containing a binder resin, a crystalline polyester, and a calcium carbonate particle, in which the crystalline polyester includes a unit derived from an aliphatic diol and a unit derived from an aliphatic dicarboxylic acid, an ester group concentration Ec of the crystalline polyester is 27% by mass or more to 50% by mass or less, a content Ma of the calcium carbonate particle included in the toner particle is 3% by mass or more to 40% by mass or less, and a ratio (Ma/Mc) of the content Ma of the calcium carbonate particle included in the toner particle to a content Mc (% by mass) of the crystalline polyester included in the toner particle is 0.2 or more to 20 or less.
    Type: Application
    Filed: December 6, 2021
    Publication date: June 23, 2022
    Inventors: Hisasuke Kajihara, Yuya Chimoto, Junichi Tamura, Kazuhisa Shirayama, Hayato Ida
  • Publication number: 20220197164
    Abstract: A method for manufacturing a toner includes a pigment crushing step of kneading a pigment, a binder, and a grinding agent to obtain a pigment dispersion in which the grinding agent and the crushed pigment are dispersed in the binder; and a step of obtaining toner particles by a predetermined method using the pigment dispersion. The binder and the grinding agent are contained in the resulting toner particles.
    Type: Application
    Filed: December 8, 2021
    Publication date: June 23, 2022
    Inventors: Junichi Tamura, Kazuhisa Shirayama, Rei Hijikawa, Ryuji Okamura, Yuya Chimoto, Hisasuke Kajihara
  • Publication number: 20220179332
    Abstract: A toner classification apparatus comprising a classification rotor, wherein the classification rotor comprises a first vane group containing first vanes and a second vane group containing second vanes, the second vanes have a length shorter than the first vane group; the number of second vanes, which are disposed between two adjacent first vanes, is 1 to 2, independently; each of the first vanes draws first trajectory and each of the second vanes draws second trajectory when the classification rotor rotates, a distance from the center of rotation to an outer circumference side end of the first and second trajectory are defined as L1 and L3, respectively, and a distance from the center of rotation to the center side end of the first and second trajectory are defined as L2 and L4, respectively, L1 to L4 satisfy prescribed relationships, and a toner production method using the toner classification apparatus.
    Type: Application
    Filed: November 23, 2021
    Publication date: June 9, 2022
    Inventors: Daisuke Yamashita, Junichi Tamura, Ran Wakayama, Katsuyuki Katoh, Yuichi Mizo
  • Publication number: 20220171300
    Abstract: A toner melt-kneading apparatus to perform melt-kneading includes a kneading chamber, a discharge member connected to the kneading chamber, and a pressure gauge provided to the discharge member. The discharge member includes a flow passage having a substantially cylindrical shape and configured to pass a kneaded material. The pressure gauge includes a thermometer and includes a pressure-measuring portion disposed in the flow passage. D, d, and ? satisfy the following relationship, where a length of the flow passage is denoted as D, a distance from a discharge port in a downstream-side end portion of the discharge member to the pressure-measuring portion is denoted as d, and an inner diameter of the flow passage is denoted as ?, 0.020?(d/D)/? (herein, D>d).
    Type: Application
    Filed: November 30, 2021
    Publication date: June 2, 2022
    Inventors: Yosuke Iwasaki, Junichi Tamura, Yuichi Mizo, Yasuhiro Noami, Naotsugu Kaneko, Daiki Kawano
  • Publication number: 20220108114
    Abstract: A bed system includes: an imaging device; a bed on which the imaging device is to be installed; and a controller configured to process an image acquired by the imaging device to predict a possibility of overturning of a user, in which, when it is determined that a state of the user is a first state, the controller predicts the possibility of overturning of the user based on a first parameter, when it is determined that the state of the user is a second state, the controller predicts the possibility of overturning of the user based on a second parameter, the first state is a state of the user different from the second state, and the first parameter is different from the second parameter.
    Type: Application
    Filed: May 21, 2021
    Publication date: April 7, 2022
    Inventors: Mao YOSHIDA, Takeshi NAGAYASU, Yosuke YAMAZAKI, Junichi TAMURA
  • Publication number: 20220020099
    Abstract: A profile evaluation apparatus includes a processor configured to evaluate, in a case where users register profiles of the users, credibility of a profile item of a target user input to a profile publication service, which publishes the registered profiles, on a basis of information regarding the target user managed for a social networking service.
    Type: Application
    Filed: January 8, 2021
    Publication date: January 20, 2022
    Applicant: FUJIFILM BUSINESS INNOVATION CORP.
    Inventors: Junichi TAMURA, Chizuko SENTO
  • Publication number: 20210397104
    Abstract: Toner classification apparatus comprising classification rotor comprising a plurality of vanes extending from rotation center side of classification rotor to outer circumference side of classification rotor; the plurality of vanes are disposed with prescribed gaps established between vanes; gaps form opening facing rotation center region of classification rotor; each of vanes is disposed such that portion of vane away from of center of rotation of classification rotor is located on more upstream side in a direction of rotation of classification rotor than portion of vane closer to center of rotation of classification rotor; each of vanes has elbow; and in a horizontal cross section provided by sectioning classification rotor in a rotational axis perpendicular direction of classification rotor, shape of vane satisfies prescribed formulae, as well as toner production method comprising classification step of carrying out classification process on particles to be classified by using toner classification apparatus
    Type: Application
    Filed: June 10, 2021
    Publication date: December 23, 2021
    Inventors: Daisuke YAMASHITA, Yuichi MIZO, Junichi TAMURA, Ran WAKAYAMA, Yutaro YOSHIDA
  • Patent number: 11198159
    Abstract: An article sorting apparatus, comprising a sorting mechanism (23) that performs a sorting operation to convey an inspected article (W) in one of a plurality of sorting directions (D1, D2 and D3); and a control unit that receives a sorting control signal (RJ) and controls operation of the sorting mechanism (23), wherein the sorting mechanism (23) includes rejection arms (31, 32) that change posture between a rejection posture where the rejection arms contact with the article (W) to change the conveyance direction to a specific sorting direction (D2 or D3) and a pass allowance posture where the rejection arms allow the article (W) to pass without contacting with the article, and air cylinders (33A, 33B) that operate the rejection arms to change the posture thereof, and an acceleration sensor (61) and a detection unit (62) and a deterioration determination circuit (46) that determines the deterioration of the movable portion (23M).
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: December 14, 2021
    Assignee: ANRITSU CORPORATION
    Inventors: Junichi Tamura, Koji Koizumi