Patents Assigned to Citizen Watch Co., Ltd.
  • Patent number: 10648048
    Abstract: Provided is a hexavalent chromium treatment agent capable of penetrating inside of a leather and capable of reducing not only hexavalent chromium present in the vicinity of the surface of the leather but also hexavalent chromium present inside the leather into trivalent chromium. The hexavalent chromium treatment agent of the present invention comprises a hexavalent chromium-reducing compound capable of reducing hexavalent chromium into trivalent chromium, a nonionic surfactant, and an aqueous solvent. The hexavalent chromium-reducing compound preferably comprises an organic compound (A) that has a specific structure capable of acting to reduce hexavalent chromium into trivalent chromium, that has a hydroxyphenyl group, and that has no aldehyde groups and no carboxyl groups.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: May 12, 2020
    Assignee: CITIZEN WATCH CO., LTD.
    Inventor: Yuji Akao
  • Patent number: 10648868
    Abstract: Provided is a surface acoustic wave device using a novel and steadily suppliable piezoelectric material that is resistant to a high-temperature environment and enables the surface acoustic wave device to use a 2 GHz to 2.5 GHz band or higher. The surface acoustic wave device includes: a piezoelectric substrate formed from a monocrystal of gehlenite (CAS: Ca2Al(AlSi)O7); and interdigital transducers formed on a surface acoustic wave propagation plane of the piezoelectric substrate.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: May 12, 2020
    Assignee: CITIZEN WATCH CO., LTD.
    Inventors: Youichi Nonogaki, Yoshitaka Kinoshita, Takashi Akahane, Satoshi Sohda
  • Patent number: 10644615
    Abstract: An electrostatic induction generator includes a housing, a first board fixed to the housing, and a second board arranged in parallel to the first board to be able move relative to it, in which electrostatic induction generator, counter electrodes are placed at a first facing surface of the first board, electrically charged films are placed at every other constant interval at a second facing surface of the second board so as to face the counter electrodes, the counter electrodes are comprised of pluralities of first electrodes and second electrodes provided separated from each other at the first facing surface, first electrodes and second electrodes are alternately arranged at constant intervals in a single line, a plurality of lines of single lines of the first electrodes and second electrodes are provided at the first facing surface, and the constant intervals of the plurality of lines respectively differ in phase.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: May 5, 2020
    Assignee: CITIZEN WATCH CO., LTD.
    Inventors: Yoichi Nagata, Akira Shiota, Makoto Watanabe, Akira Izumi, Takashi Ihara
  • Patent number: 10632769
    Abstract: A printer includes a recording medium holding unit that holds a long, wound strip-like recording medium to enable the recording medium to be pulled out from a front end thereof, a recording unit that pulls out the recording medium held by the recording medium holding unit to a side higher in a vertical direction than a position for pulling out from the recording medium holding unit and that executes a recording operation for the pulled-out recording medium, and a second cutter mechanism disposed under the recording medium holding unit and that cuts the recording medium for which the recording operation is executed by the recording unit at the back end thereof separated from the front end by a predetermined length. A drawing position of the recording medium into an inversion path is arranged to be lower than the recording medium holding unit and the recording unit in the vertical direction.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: April 28, 2020
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN SYSTEMS JAPAN CO., LTD.
    Inventors: Akira Takahashi, Takeshi Yamazaki, Yuichi Taguchi
  • Patent number: 10632768
    Abstract: A printer is configured that, when double-side recording is executed, a back end side of a long strip-like recording medium on which single-side recording is executed by a recording unit is cut by a cutter mechanism, the cut-off recording medium is thereafter conveyed to an inversion mechanism starting with a front end thereof by a switching flap disposed on a side closer to a discharge outlet than the cutter mechanism, a front side and a back side are inverted to each other at the inversion mechanism, thereafter the recording medium is again conveyed to the recording unit starting with an end thereof that is the back end when the recording medium is conveyed to the inversion mechanism, recording is executed for the back side by the recording unit, thereafter the recording medium is again conveyed to the cutter mechanism, and a margin is cut off by the cutter mechanism.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: April 28, 2020
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN SYSTEMS JAPAN CO., LTD.
    Inventor: Akira Takahashi
  • Patent number: 10629786
    Abstract: A light-emitting device and a manufacturing method thereof are provided, which device yields light exhibiting an actual hue with a deviation reduced as much as possible from a designed hue value, wherein the light is a mixture of light emitted from densely-mounted light-emitting elements and excited light from a phosphor contained in a resin sealing the light-emitting elements. The light-emitting device includes a board, light-emitting elements mounted densely on the board so that light-emitting surfaces thereof face opposite to the board, and a seal resin containing a plurality of different phosphors and covering all of the light-emitting elements, wherein the phosphors are excited by light from the light-emitting elements and deposited on upper surfaces of the light-emitting elements. A space between adjacent light-emitting elements has a length of 5 ?m or more and 120% or less of a median diameter D50 of a phosphor which has the largest average particle size of the phosphors.
    Type: Grant
    Filed: May 30, 2016
    Date of Patent: April 21, 2020
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Sadato Imai, Masahide Watanabe, Hirohiko Ishii, Koki Hirasawa
  • Patent number: 10629785
    Abstract: Provided is a light-emitting device including a mount board, an LED element mounted on the mount board, and a translucent or transparent sealing resin being filled onto the mount board to seal the LED element. The sealing resin contains first and second particulate phosphors excited by emitted light from the LED element, and a nanoscale filler having an average particle size in the range of 1 nm to 100 nm. The specific gravity of the first particulate phosphor is smaller than that of the second particulate phosphor. The sealing resin includes a dispersion layer of the first particulate phosphor covering areas obliquely above and beside the LED element, and a deposition layer of the second particulate phosphor on upper surfaces of the mount board and the LED element. The first particulate phosphor is dispersed in the dispersion layer among aggregates formed by particles of the nanoscale filler.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: April 21, 2020
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD
    Inventor: Nodoka Oyamada
  • Patent number: 10625355
    Abstract: A numerical control apparatus includes: a drive unit controlling a main shaft rotating a workpiece, a first drive shaft feeding a cutting tool relatively to the workpiece along a perpendicular direction to a lead direction of a thread, and a second drive shaft feeding the cutting tool relatively to the workpiece along the lead direction; and a vibration unit superimposing, on movement of the first drive shaft, vibration having a period having a predetermined ratio with a rotation period of the main shaft, and forms a thread on the workpiece by moving the cutting tool and the workpiece relative to each other and performing cut processes on the workpiece. The numerical control apparatus includes a thread-cutting vibration adjustment unit controlling the drive unit to shift phase of the vibration with respect to phase of the main shaft by a predetermined vibration phase shift amount every time in the cut processes.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: April 21, 2020
    Assignees: Mitsubishi Electric Corporation, CITIZEN WATCH CO., LTD, CITIZEN MACHINERY CO., LTD.
    Inventors: Mitsuo Watanabe, Masakazu Sagasaki, Yuki Hirata, Kazuhiko Sannomiya, Takaichi Nakaya
  • Patent number: 10622917
    Abstract: In order to produce a larger output and smaller friction acting on a movable substrate of an electrostatic-type electromechanical transducer using electrostatic interaction between charged portions and opposing electrodes to transduce between electric power and motive power, the electrostatic-type electromechanical transducer includes: a fixed substrate; a movable substrate being movable while maintaining a predetermined distance between the fixed substrate and the movable substrate; charged portions disposed on a first surface of the movable substrate at intervals in a direction of movement of the movable substrate, the first surface facing the fixed substrate; opposing electrodes disposed on the fixed substrate in the direction of movement, the opposing electrodes facing the movable substrate; and a ground electrode facing a second surface of the movable substrate, the second surface being opposite to the first surface.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: April 14, 2020
    Assignee: CITIZEN WATCH CO., LTD.
    Inventor: Izumi Yamamoto
  • Publication number: 20200108450
    Abstract: A tool rest for a machine tool, with a plurality of rotary tools and a tool-rotating drive shaft supported rotatably so that its rotation is transmitted to each rotary tool. The tool rest includes: a plurality of input portions fixed to the tool-rotating drive shaft; and engaging portions corresponding to the respective input portions, rotatably supported and adopted to be driven in rotation by the input portions for engaging with engaged portions of each rotary tool to transmit power when a prescribed rotational phase is reached. Adjusting means is provided between a prescribed input portion and the engaging portion, for adjusting the phase of the engaging portion relative to the tool-rotating drive shaft such that the engaging portions and the corresponding engaged portions are engaged simultaneously.
    Type: Application
    Filed: June 1, 2018
    Publication date: April 9, 2020
    Applicants: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventor: Noriyoshi TAGUCHI
  • Patent number: 10610993
    Abstract: A control apparatus for machine tool, in accordance with user set conditions, feeds a cutting tool in a feeding direction while reciprocatively vibrating the cutting tool, smoothly cuts a workpiece, and achieves a machined surface having an improved appearance. In a machine tool and a control apparatus thereof, a control means is configured to set the number of rotations of relative rotation and the number of vibrations of reciprocating vibration during one rotation of the relative rotation in accordance with a vibration frequency attributable to a cycle during which an operation instruction can be issued, and the control means includes adjusting means configured to adjust the number of rotations or the number of vibrations set by the control means.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: April 7, 2020
    Assignees: Citizen Watch Co., Ltd., Citizen Machinery Co. Ltd.
    Inventors: Takaichi Nakaya, Kazuhiko Sannomiya, Ayako Kitakaze
  • Publication number: 20200103828
    Abstract: In a timepiece, moments of inertia of a first pointer and a second pointer that are for displaying first information and second information, respectively and that have a same rotation axis are the same. As a result, parts having identical specifications may be used in a drive mechanism of the first pointer and a drive mechanism of the second pointer. Further, color schemes of the first pointer and second pointer differ. As a result, a user may easily distinguish the first pointer and the second pointer.
    Type: Application
    Filed: September 16, 2019
    Publication date: April 2, 2020
    Applicant: CITIZEN WATCH CO., LTD.
    Inventors: Naoaki OKAMURA, Akihiko KURODA
  • Publication number: 20200101538
    Abstract: A control device for a machine tool and a machine tool, for which settings of the number of vibrations per rotation become easy, is provided. The control device of the machine tool controls a relative rotation between a workpiece and a cutting tool and a relative reciprocal movement between the workpiece and the cutting tool in a feed direction to perform vibration cutting to the workpiece. The control device includes a control section for controlling a spindle headstock, a first tool post, and a second tool post, the workpiece W being installed on the spindle headstock, the first tool post being provided to be reciprocally movable along the feed direction with respect to the spindle headstock and installed with a first cutting tool for cutting the workpiece, and the second tool post being provided to be reciprocally movable along the feed direction with respect to the spindle headstock independently of the first tool post and installed with a second cutting tool for cutting the workpiece.
    Type: Application
    Filed: March 28, 2018
    Publication date: April 2, 2020
    Applicant: CITIZEN WATCH CO., LTD.
    Inventors: Ayako KITAKAZE, Masahiro MURAMATSU, Kenji NOGUCHI
  • Publication number: 20200094327
    Abstract: To provide a machine tool and a control device for the machine tool that allows a user to select the vibration condition according to an input number of rotations and an input number of vibrations.
    Type: Application
    Filed: December 21, 2017
    Publication date: March 26, 2020
    Applicant: CITIZEN WATCH CO., LTD.
    Inventors: Masahiro MURAMATSU, Daisuke SAKASHITA, Haruhiko MISONO
  • Patent number: 10589542
    Abstract: In order to prevent degradation in print quality which can come from matter generated from an ink ribbon and adhering to a thermal head, the thermal transfer printer transports an ink ribbon which has characteristics such that the amount of matter generated from the ink ribbon by transfer and adhering to the thermal head has a peak at predetermined transfer energy and reduces in an energy range higher than the predetermined transfer energy with increase in transfer energy, transfers ink and protective material onto paper in this order from the ink ribbon on which the ink and the protective material are repeatedly arranged in a longitudinal direction thereof, and adjusts transfer energy for the protective material to a value within a predetermined range.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: March 17, 2020
    Assignee: CITIZEN WATCH CO., LTD.
    Inventors: Takeshi Yamazaki, Yutaka Inokuchi
  • Patent number: 10591662
    Abstract: To provide a planar light unit that optically and mechanically connects a light-emitting device and a light guide plate to each other in a stable manner so as to improve luminous efficiency and brightness uniformity on a light exit surface. A planar light unit 40 includes: a light guide plate 2, which includes a light incident portion 2f on a side edge of the light guide plate 2; a light-emitting device 3, which is configured to emit light into an inside of the light guide plate 2 through the light incident portion 2f; and a light source board 4, on which the light-emitting device 3 is mounted. The light incident portion 2f includes a recess 2a and a reflecting-shaped portion 2b. A flexible resin 6, which has a light-transmitting property and a flexibility, is disposed between a light incident surface 2c, which is formed on the recess 2a, and the light-emitting device 3.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: March 17, 2020
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Junji Miyashita, Tomoo Udagawa
  • Patent number: 10589367
    Abstract: A machine forms threads on a workpiece by relatively feeding the workpiece and a cutting tool in a feeding direction while relatively rotating the workpiece and the cutting tool, and by performing a helical cutting work multiple times while carrying out relative reciprocal vibration of the workpiece and the cutting tool in a radial direction of the workpiece. The machine tool or a control device of the machine tool includes a vibration setting unit to set a pattern of vibration during each cutting work accompanied by the reciprocal vibration so that a cut portion of one cutting work partially includes a portion that has been cut in another cutting work. The machine tool and the control device prevent a long, continuous chip from becoming entangled with a workpiece or a cutting tool in the process of forming threads on the workpiece.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: March 17, 2020
    Assignees: Citizen Watch Co., Ltd., Citizen Machinery Co., Ltd.
    Inventors: Kazuhiko Sannomiya, Takaichi Nakaya
  • Patent number: D878935
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: March 24, 2020
    Assignee: Citizen Watch Co., Ltd.
    Inventor: Maiko Kimura
  • Patent number: D879195
    Type: Grant
    Filed: August 24, 2018
    Date of Patent: March 24, 2020
    Assignees: Citizen Watch Co., LTD., Citizen Systems Japan Co., LTD.
    Inventor: Shinichi Miyashita
  • Patent number: D878311
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: March 17, 2020
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventor: Shinsuke Watanabe