Patents by Inventor Kiyotaka Yamaguchi
Kiyotaka Yamaguchi 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).
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Publication number: 20240094940Abstract: A memory system includes a non-volatile memory and a controller. The controller is configured to perform a write operation of a first data cluster and a first partial overwrite operation of the first data cluster with first overwrite data. The write operation includes compressing and then encrypting the first data cluster, and writing the compressed and encrypted first data cluster into a first physical location of the non-volatile memory. The first partial overwrite operation includes encrypting the first overwrite data without performing compression, reading the compressed and encrypted first data cluster from the first physical location of the non-volatile memory, generating a first composite data cluster with the compressed and encrypted first data cluster read from the first physical location and the encrypted first overwrite data that is not compressed, and writing the first composite data cluster into a second physical location of the non-volatile memory.Type: ApplicationFiled: September 1, 2023Publication date: March 21, 2024Inventors: Kensaku YAMAGUCHI, Kiyotaka IWASAKI, Takashi TAKEMOTO, Kohei OIKAWA
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Publication number: 20230150263Abstract: An inkjet recording apparatus includes a conveying portion, a recording portion including a line head including a plurality of recording heads, a temperature detecting portion, a cooling mechanism, and a control portion. The cooling mechanism includes a storing portion that stores cooling liquid, a circulation path of the cooling liquid that is arranged to be branched into a plurality of branch paths passing near the recording heads, a heat dissipating portion that dissipates heat of the cooling liquid, and a pump that causes the cooling liquid to circulate. If there exists, among the recording heads, a recording head that is predicted to undergo a temperature rise, the control portion increases a flow amount or circulation time of the cooling liquid in whichever of the branch paths serves as a flow path of the cooling liquid flowing toward the recording head that is predicted to undergo a temperature rise.Type: ApplicationFiled: November 9, 2022Publication date: May 18, 2023Applicant: KYOCERA Document Solutions Inc.Inventor: Kiyotaka YAMAGUCHI
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Publication number: 20230056035Abstract: An ink-jet recording apparatus includes a recording head, an irregularity detecting unit, a recording medium conveyance unit, and a control unit. The irregularity detecting unit detects an irregularity with the recording medium conveyed toward the recording head. The recording medium conveyance unit has a recording medium diversion unit into which the recording medium with which an irregularity has been detected by the irregularity detecting unit is conveyed. The control unit can perform flushing operation and, when the irregularity detecting unit detects an irregularity with the recording medium, the control unit cancels the flushing operation set immediately before the recording medium with which the irregularity has been detected and conveys, by controlling the recording medium conveyance unit, the recording medium to the recording medium diversion unit.Type: ApplicationFiled: August 18, 2022Publication date: February 23, 2023Applicant: KYOCERA Document Solutions Inc.Inventor: Kiyotaka YAMAGUCHI
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Patent number: 11134163Abstract: An image forming apparatus includes an exit tray, a displacing mechanism, and a controller. A sheet is ejected on the exit tray. The displacing mechanism displaces a position of the sheet on the exit tray. The controller controls the displacing mechanism. The controller determines whether the sheet is a valid sheet that meets a predetermined condition or an invalid sheet that does not meet the predetermined condition. The controller controls the displacing mechanism so that a position of the valid sheet differs from a position of the invalid sheet on the exit tray.Type: GrantFiled: July 10, 2020Date of Patent: September 28, 2021Assignee: KYOCERA Document Solutions Inc.Inventor: Kiyotaka Yamaguchi
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Publication number: 20210021726Abstract: An image forming apparatus includes an exit tray, a displacing mechanism, and a controller. A sheet is ejected on the exit tray. The displacing mechanism displaces a position of the sheet on the exit tray. The controller controls the displacing mechanism. The controller determines whether the sheet is a valid sheet that meets a predetermined condition or an invalid sheet that does not meet the predetermined condition. The controller controls the displacing mechanism so that a position of the valid sheet differs from a position of the invalid sheet on the exit tray.Type: ApplicationFiled: July 10, 2020Publication date: January 21, 2021Applicant: KYOCERA Document Solutions Inc.Inventor: Kiyotaka YAMAGUCHI
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Patent number: 8720881Abstract: An image forming apparatus is provided that can efficiently reduce power consumption. The image forming apparatus includes a power supply portion that brings, into a power saving state, a paper feed device holding a sheet of a sheet size whose paper feed frequency does not reach a threshold value and a notification portion that provides a notification that a paper feed device holding the sheet of the sheet size whose paper feed frequency reaches the threshold value is encouraged to be the paper feed device that is closer to the print portion than the paper feed device holding the sheet of the sheet size whose paper feed frequency does not reach the threshold value.Type: GrantFiled: March 28, 2013Date of Patent: May 13, 2014Assignee: KYOCERA Document Solutions Inc.Inventor: Kiyotaka Yamaguchi
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Publication number: 20130256973Abstract: An image forming apparatus is provided that can efficiently reduce power consumption. The image forming apparatus includes a power supply portion that brings, into a power saving state, a paper feed device holding a sheet of a sheet size whose paper feed frequency does not reach a threshold value and a notification portion that provides a notification that a paper feed device holding the sheet of the sheet size whose paper feed frequency reaches the threshold value is encouraged to be the paper feed device that is closer to the print portion than the paper feed device holding the sheet of the sheet size whose paper feed frequency does not reach the threshold value.Type: ApplicationFiled: March 28, 2013Publication date: October 3, 2013Applicant: KYOCERA DOCUMENT SOLUTIONS INC.Inventor: Kiyotaka YAMAGUCHI
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Patent number: 7183510Abstract: A switching device capable of preventing entrance of water from outside of a case through a space below an operation knob into the case is disclosed. The switching device includes: a switch; a case within which the switch is accommodated; a hollow cylinder which is provided on the upper surface of the case 1 and open to above and below to communicate with the inside of the case 1; an operation knob provided to cover the upper opening of the cylinder such that the operation knob can swing; and an operation bar which extends through the lower opening of the cylinder into the case to transmit the motion of the operation knob to the switch. A projection is provided on the upper surface of the case in the vicinity of the cylinder. The lower end of the operation knob is opposed to the upper end of the projection with a small clearance interposed therebetween when the operation knob is not shifted.Type: GrantFiled: March 21, 2006Date of Patent: February 27, 2007Assignee: Omron CorporationInventors: Hiroyuki Ami, Kiyotaka Yamaguchi, Hideyo Kakuno
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Publication number: 20060260920Abstract: A switching device capable of preventing entrance of water from outside of a case through a space below an operation knob into the case is disclosed. The switching device includes: a switch; a case within which the switch is accommodated; a hollow cylinder which is provided on the upper surface of the case 1 and open to above and below to communicate with the inside of the case 1; an operation knob provided to cover the upper opening of the cylinder such that the operation knob can swing; and an operation bar which extends through the lower opening of the cylinder into the case to transmit the motion of the operation knob to the switch. A projection is provided on the upper surface of the case in the vicinity of the cylinder. The lower end of the operation knob is opposed to the upper end of the projection with a small clearance interposed therebetween when the operation knob is not shifted.Type: ApplicationFiled: March 21, 2006Publication date: November 23, 2006Applicant: OMRON CorporationInventors: Hiroyuki Ami, Kiyotaka Yamaguchi, Hideyo Kakuno
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Patent number: 6864454Abstract: A switch apparatus of the invention can avoid contact damage without inviting a drastic increase in a size even when applied to a high power source voltage and does not deteriorate return feeling to a neutral state. The switch apparatus includes a switch A for cutting off connection between one side driving input of a DC motor and a negative plate side power source, a switch B for cutting off connection between the other side driving input and the negative plate side power source, and a switch C for cutting off connection between the one side driving input and the positive plate side power source and connection between the other side driving input and the positive plate side power source, wherein the switch A and the switch B are normally-closed type switches and the switch C is a normally-open type switch. The switch C is opened at a predetermined time before the switch A or the switch B is closed, and cuts off in advance a power source route to avoid the occurrence of dead short-circuit.Type: GrantFiled: October 16, 2003Date of Patent: March 8, 2005Assignee: Omron CorporationInventors: Keiichi Shimizu, Yasuhide Tanaka, Kiyotaka Yamaguchi
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Publication number: 20040124794Abstract: A switch apparatus of the invention can avoid contact damage without inviting a drastic increase in a size even when applied to a high power source voltage and does not deteriorate return feeling to a neutral state. The switch apparatus includes a switch A for cutting off connection between one side driving input of a DC motor and a negative plate side power source, a switch B for cutting off connection between the other side driving input and the negative plate side power source, and a switch C for cutting off connection between the one side driving input and the positive plate side power source and connection between the other side driving input and the positive plate side power source, wherein the switch A and the switch B are normally-closed type switches and the switch C is a normally-open type switch. The switch C is opened at a predetermined time before the switch A or the switch B is closed, and cuts off in advance a power source route to avoid the occurrence of dead short-circuit.Type: ApplicationFiled: October 16, 2003Publication date: July 1, 2004Inventors: Keiichi Shimizu, Yasuhide Tanaka, Kiyotaka Yamaguchi
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Patent number: 6005201Abstract: In a switch, the speed at which contacts are separated from each other is increased without depending on the speed at which an operating member is operated, so that an arc is prevented from being generated, to prevent the operating member to be deformed by heat generation and prevent the durability of the switch to be decreased due to the abrasion of the contacts. A movable contact member having movable contacts at both its ends is swingably supported with a common fixed contact projecting upward and serving as a fulcrum. A leaf spring is fixed to a slider. The leaf spring has a portion projecting in a U shape. The U-shaped portion is engaged with the center of the movable contact member. When the slider is moved, the U-shaped portion is distorted in the transverse direction. When the slider is further moved, the U-shaped portion gets beyond the fulcrum, so that the movable contact is rapidly separated from a normally open fixed contact.Type: GrantFiled: November 14, 1997Date of Patent: December 21, 1999Assignee: Omron CorporationInventors: Yasuhide Tanaka, Keiichi Shimizu, Kiyotaka Yamaguchi
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Patent number: 5821483Abstract: An objective of the invention is to provide a power window switch apparatus for an automobile such that the circuit boards within the case which hold the electronic components could be soldered on one side only, thereby reducing production cost and making it easier to lead the wiring pattern around the boards despite the space limitations imposed by the car door. The freedom with which the circuit boards could be designed is also increased. Circuit boards are built into a case facing each other at right angles to the surface on which operating knobs are arranged in a row. This arrangement makes it easy to solder modular switches and wiring terminals of the connector to the circuit boards on one side only. It also makes it possible to increase the surface area of the circuit boards to the very limit of the height restriction imposed on the switch apparatus by the automobile door.Type: GrantFiled: January 11, 1996Date of Patent: October 13, 1998Assignee: Omron CorporationInventors: Kiyotaka Yamaguchi, Yasuhide Tanaka
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Patent number: 5814427Abstract: What is disclosed a decolorizable toner of which main components are a visible ray-near infrared ray-absorbing dye, a decolorizing agent and a resin binder, characterized in that a resin binder A containing the visible ray-near infrared ray-absorbing dye is dispersed in a resin binder B and that the decolorizing agent is blended with at least one of the resin binder A and the resin binder B, and a process for preparing the same. The visible ray-near infrared ray-decolorizable toner of the present invention can be speedily decolorized by irradiating with visible rays to near infrared rays. Also, according to the process of the present invention, it is easy to adjust its electrically charged amount by a material having electrification property, and there is obtained a visible ray-near infrared ray-decolorizable toner which is hardly faded during the kneading in the production of the toner.Type: GrantFiled: July 3, 1995Date of Patent: September 29, 1998Assignees: Bando Chemical Industries, Ltd., Showa Denko K.K.Inventors: Katsumi Murofushi, Yoshikazu Hosoda, Akira Yamauchi, Yuki Abe, Harushi Nagami, Kiyotaka Yamaguchi, Takayuki Yoshida, Mitsuhiro Uchino
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Patent number: 5770825Abstract: In a switch device, a metal stamping has a first group of connector terminals arranged in one line among plural lines of arranged connector terminals and is constructed by one metal stamping together with a wiring pattern. The metal stamping is subjected to an insert molding process to form an insert molding. A second group of connector terminals, arranged in another line, among the connector terminals arranged in plural lines, are formed from parts of metal pieces which are separate from the metal stamping. The second group of connector terminals are press-fitted in the insert molding. In the switch device, the manufacture of the metal stamping requires minimal bending steps, and the manufacture can be achieved with the use of a simple stamping metal mold.Type: GrantFiled: July 26, 1996Date of Patent: June 23, 1998Assignee: Omron CorporationInventors: Kiyotaka Yamaguchi, Hiroyuki Kuroda, Kazuya Yoshikawa
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Patent number: 5710684Abstract: In a cleaning mechanism for a magnetic head which mechanically cleans a recording/reproducing face of a magnetic head by using a cleaning brush, a basal portion of which is supported by a device fixing portion, a resin block is fixed to an end portion of an L-shaped brush stem of the cleaning brush, the brush stem being made of a metal plate, and a number of brush pieces which are to come into contact with the recording/reproducing face are formed integrally with the resin block.Type: GrantFiled: January 18, 1996Date of Patent: January 20, 1998Assignee: Mitsumi Electric Co., Ltd.Inventors: Naoto Inoue, Kiyotaka Yamaguchi
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Patent number: 5607803Abstract: The present invention discloses a decolorizable toner wherein a cationic dye having absorbance from the visible region to the near infrared region is contained in a binder resin together with a decolorant and anti-discoloration agent. In addition, the present invention also discloses a production process of a decolorizable toner that contains a step wherein cationic dye having absorbance from the visible region to the near infrared region, decolorant, binder resin and anti-discoloration agent are uniformly dissolved or dispersed in an organic solvent to prepare a mixed solution; a step wherein the solvent is removed from this mixed solution followed by drying; and, a step wherein the resulting dried mixture is pulverized to produce a toner.Type: GrantFiled: December 9, 1994Date of Patent: March 4, 1997Assignees: Showa Denko K.K., Bando Chemical Industries, Ltd.Inventors: Katsumi Murofushi, Yoshikazu Hosoda, Toshiya Kawasaki, Yuki Abe, Kiyotaka Yamaguchi, Takayuki Yoshida
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Patent number: 5535080Abstract: A magnetic head connecting structure includes a back of a magnetic head held by a tape guide covered with a backshield made of a metal strip and a flexible board soldered to lead terminals of the magnetic head which project from openings of the backshield. In such a magnetic head, a pair of temporarily retaining pawls projecting toward the tape guide are integrally molded on both sides of the backshield, and the temporarily retaining pawls are inserted and temporarily retained in corresponding fixing holes formed in a back of the tape guide.Type: GrantFiled: December 22, 1994Date of Patent: July 9, 1996Assignee: Mitsumi Electric Co., Ltd.Inventors: Naoto Inoue, Kiyotaka Yamaguchi
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Patent number: 5469318Abstract: A magnetic head device with a cleaning mechanism includes: a head mounting stand including a head setting space in which a magnetic head is set, and tape guides for regulating the running of a magnetic tape, a lever which is swingably supported by a shaft on the upper surface of the rear end portion of the head mounting stand, a cleaning member embedded in the inner surface of the front end portion of the lever which is bent, and a drive member engaged with the rear end portion of the lever to swing the lever, the cleaning member being slidably moved on the front surface of the magnetic head. In the device, the shaft and the head mounting stand are formed as one unit.Type: GrantFiled: July 25, 1994Date of Patent: November 21, 1995Assignee: Mitsumi Electric Co., Ltd.Inventors: Naoto Inoue, Kiyotaka Yamaguchi
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Patent number: 5449583Abstract: A decolorizable toner including a resin binder, a near infrared ray-absorbing dye, a decolorizing agent and a light fastness stabilizer, and a process for preparing the decolorizable toner, which includes the steps of mixing the near infrared ray-absorbing dye and the light fastness stabilizer with the resin binder, and then mixing the decolorizing agent therewith. The decolorizable toner has excellent light stability during its production or storage and excellent decolorizing property.Type: GrantFiled: September 6, 1994Date of Patent: September 12, 1995Assignees: Showa Denko, K.K., Bando Chemical Industries, Ltd.Inventors: Katsumi Murofushi, Yoshikazu Hosoda, Yuki Abe, Kiyotaka Yamaguchi, Takayuki Yoshida