Patents by Inventor Kenji Yabe

Kenji Yabe 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).

  • Publication number: 20210389713
    Abstract: An image forming apparatus includes an image bearer, a protectant applicator, a heating device, and a protectant biasing member. The protectant applicator applies protectant to the image bearer. The heating device includes a heater including a base, a heat generator, an electrode, and a conductor coupling the heat generator to the electrode. The heater has a first position and a second position having a higher temperature than the first position. These are symmetrical to each other with respect to a longitudinal center of a heat generation area of the heater. The protectant biasing member biases the protectant to the protectant applicator with a first biasing force at a position closer to the first position than to the second position and with a second biasing force larger than the first biasing force at a position closer to the second position than to the first, and the protectant contacts the protectant applicator.
    Type: Application
    Filed: June 2, 2021
    Publication date: December 16, 2021
    Applicant: Ricoh Company, Ltd.
    Inventors: Kenji YABE, Yuusuke FURUICHI, Tomoya ADACHI
  • Patent number: 11192381
    Abstract: A liquid ejection apparatus includes: a recording head that ejects liquid; a sub-tank that is connected to the recording head and temporarily stores the liquid to be supplied to the recording head; a liquid tank that communicates with the sub-tank and is able to be filled with the liquid; a first atmosphere opening unit that is provided in the liquid tank; and a second atmosphere opening unit that is provided in the sub-tank. The second atmosphere opening unit is closable when the liquid tank is filled with the liquid, and the first atmosphere opening unit and the second atmosphere opening unit are able to open the liquid tank and the sub-tank to the atmosphere, respectively, when the sub-tank is filled with the liquid filled in the liquid tank by a hydraulic head pressure.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: December 7, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroki Tajima, Keiichiro Tsukuda, Kenji Yabe, Yuji Tamaru, Naoko Shimizu, Kyosuke Toda, Sayaka Seki, Yosuke Takagi, Shimpei Yoshikawa, Ryo Sato
  • Publication number: 20210197562
    Abstract: A liquid discharge head includes an element substrate including an energy generation element configured to generate energy for discharging liquid from a discharge port, and a supporting member which supports the element substrate and in which a liquid chamber configured to supply liquid to the discharge port is formed, wherein a recessed portion communicating with the liquid chamber is formed at a position above the liquid chamber in a vertical direction in an orientation of the liquid discharge head when used, and wherein at least one of surfaces forming the recessed portion is formed of a flexible member configured to absorb vibration of liquid in the liquid chamber.
    Type: Application
    Filed: December 11, 2020
    Publication date: July 1, 2021
    Inventors: Kyosuke Toda, Sayaka Seki, Shimpei Yoshikawa, Kazuhiko Okito, Kenji Yabe, Yasuaki Kitayama, Ryo Sato
  • Publication number: 20210197566
    Abstract: A liquid ejection head includes an element substrate having an energy-generating element configured to generate an energy for ejecting a liquid from an ejection orifice, a support member for supporting the element substrate, the support member including a liquid chamber formed therein to supply the liquid to the ejection orifice, and a damper portion for absorbing vibration of the liquid inside the liquid chamber, the damper portion being flexible. The support member has a through-hole for communicating with the liquid chamber at a position located above the liquid chamber in a vertical direction when the liquid ejection head is in a use orientation. The damper portion has a taper portion that tapers downwardly in the vertical direction and is positioned in such a manner that the tapering portion closes the through-hole, and the damper portion and the support member are attached to each other by a fixing member.
    Type: Application
    Filed: December 9, 2020
    Publication date: July 1, 2021
    Inventors: Sayaka Seki, Kyosuke Toda, Shimpei Yoshikawa, Ryo Sato, Keiichiro Tsukuda, Kazuhiko Okito, Kenji Yabe, Yasuaki Kitayama
  • Publication number: 20210162766
    Abstract: A liquid filling method of filling a liquid storage device including a first tank that stores a liquid to be supplied to an ejection head ejecting the liquid and a second tank that stores the liquid to be supplied to the first tank through a connection port provided in the first tank with the liquid, the method including: injecting the liquid from a liquid storage container into the first tank through a first liquid introduction port provided in the first tank, in a state where a second liquid introduction port provided in the second tank is closed.
    Type: Application
    Filed: November 24, 2020
    Publication date: June 3, 2021
    Inventors: Atsushi OMURA, Hiroki TAJIMA, Keiichiro TSUKUDA, Kenji YABE, Yuji TAMARU, Naoko SHIMIZU, Sayaka SEKI, Yosuke TAKAGI, Shimpei YOSHIKAWA, Ryo SATO, Kyosuke TODA
  • Publication number: 20200290362
    Abstract: A liquid ejection apparatus includes: a recording head that ejects liquid; a sub-tank that is connected to the recording head and temporarily stores the liquid to be supplied to the recording head; a liquid tank that communicates with the sub-tank and is able to be filled with the liquid; a first atmosphere opening unit that is provided in the liquid tank; and a second atmosphere opening unit that is provided in the sub-tank. The second atmosphere opening unit is closable when the liquid tank is filled with the liquid, and the first atmosphere opening unit and the second atmosphere opening unit are able to open the liquid tank and the sub-tank to the atmosphere, respectively, when the sub-tank is filled with the liquid filled in the liquid tank by a hydraulic head pressure.
    Type: Application
    Filed: February 28, 2020
    Publication date: September 17, 2020
    Inventors: Hiroki Tajima, Keiichiro Tsukuda, Kenji Yabe, Yuji Tamaru, Naoko Shimizu, Kyosuke Toda, Sayaka Seki, Yosuke Takagi, Shimpei Yoshikawa, Ryo Sato
  • Publication number: 20180326723
    Abstract: The present invention provides a liquid ejecting head in which a chip crack is unlikely to occur. To achieve this, a liquid ejecting head includes an element substrate having energy generating elements arranged on the front face of the element substrate in its longitudinal direction and a channel member having ejection ports formed to correspond to the energy generating elements, respectively. In the element substrate, a supply port for supplying liquid is formed so as to pierce through from a back face to a front face of the element substrate, and inside the supply port, a beam is formed at a position closer to an end of the supply port rather than a center thereof in its longitudinal direction to connect facing inner walls of the supply port in its lateral direction.
    Type: Application
    Filed: May 1, 2018
    Publication date: November 15, 2018
    Inventors: Takanobu Manabe, Kenji Fujii, Hirohisa Fujita, Keisuke Kishimoto, Yoshinori Tagawa, Hideo Saikawa, Yasushi Iijima, Kenji Yabe, Kyosuke Toda, Yosuke Takagi, Hiroyuki Murayama
  • Patent number: 9855744
    Abstract: A liquid ejection head for ejecting a liquid includes a substrate provided with an energy generating element and a liquid supply port; a flow path forming member including an ejection opening for ejecting a liquid; and a pressure chamber communicating with the ejection opening and including the energy generating element therein and a flow path through which the pressure chamber and the liquid supply port communicate with each other, the pressure chamber and the flow path being provided between the substrate and the flow path forming member. A portion of the flow path forming member which extends from an area facing the liquid supply port to an area facing a part of the flow path extending from the liquid supply port to the pressure chamber has a thickness greater than that of a portion of the flow path forming member which faces the pressure chamber.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: January 2, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kenji Yabe
  • Publication number: 20170087838
    Abstract: A liquid ejection head for ejecting a liquid includes a substrate provided with an energy generating element and a liquid supply port; a flow path forming member including an ejection opening for ejecting a liquid; and a pressure chamber communicating with the ejection opening and including the energy generating element therein and a flow path through which the pressure chamber and the liquid supply port communicate with each other, the pressure chamber and the flow path being provided between the substrate and the flow path forming member, wherein a portion of the flow path forming member which extends from an area facing the liquid supply port to an area facing a part of the flow path extending from the liquid supply port to the pressure chamber has a thickness greater than a portion of the flow path forming member which faces the pressure chamber.
    Type: Application
    Filed: September 9, 2016
    Publication date: March 30, 2017
    Inventor: Kenji Yabe
  • Patent number: 9539813
    Abstract: A liquid discharge head including a substrate having a plurality of energy-generating elements which generates energy used to discharge a liquid, and a supply port which is a through-hole for supplying the liquid to the energy-generating elements and which extends along an arrangement direction of the plurality of the energy-generating elements; and a discharge port forming member having a plurality of discharge ports for discharging the liquid and a pair of beam-shaped projections which are parallel to each other, which project toward the substrate, and which are formed along the arrangement direction at positions opposing to the supply port, wherein an interval of the pair of beam-shaped projections is larger than a length of the pair of beam-shaped projections in a direction orthogonal to the arrangement direction of the pair of beam-shaped projections.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: January 10, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasushi Iijima, Kenji Yabe
  • Patent number: 9527281
    Abstract: A liquid ejection head includes a first recording element substrate, a second recording element substrate, and an electric wiring substrate. The first and second recording element substrates each includes an energy generating element that generates energy for ejecting a liquid, and an electroconductive protective film that is disposed so as to cover at least the energy generating element. The electric wiring substrate includes wiring for supplying electric power to the first and second recording element substrates. The electroconductive protective film of the first recording element substrate and the electroconductive protective film of the second recording element substrate are electrically connected to each other through the electric wiring substrate.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: December 27, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Yabe, Yasuhiko Osaki
  • Publication number: 20160288502
    Abstract: A liquid discharge head including a substrate having a plurality of energy-generating elements which generates energy used to discharge a liquid, and a supply port which is a through-hole for supplying the liquid to the energy-generating elements and which extends along an arrangement direction of the plurality of the energy-generating elements; and a discharge port forming member having a plurality of discharge ports for discharging the liquid and a pair of beam-shaped projections which are parallel to each other, which project toward the substrate, and which are formed along the arrangement direction at positions opposing to the supply port, wherein an interval of the pair of beam-shaped projections is larger than a length of the pair of beam-shaped projections in a direction orthogonal to the arrangement direction of the pair of beam-shaped projections.
    Type: Application
    Filed: March 2, 2016
    Publication date: October 6, 2016
    Inventors: Yasushi Iijima, Kenji Yabe
  • Patent number: 9259926
    Abstract: A liquid ejection apparatus includes an energy generating element that generates energy for ejecting a liquid; a plurality of electroconductive protective films that are disposed so as to cover at least the energy generating element and that are in contact with the liquid; and an electrifying unit that is capable of electrifying the plurality of electroconductive protective films in such a way that surfaces of the electroconductive protective films in contact with the liquid serve as anodes.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: February 16, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Kenji Yabe
  • Patent number: 9038268
    Abstract: A manufacture method can form an inkjet printing head by which a plurality of ejection openings have a uniform shape. Heaters adjacent to one another have thereamong a common conductive line commonly connected to these heaters or a dummy conductive line not involved in the energization of the heaters.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: May 26, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Yamane, Kenji Yabe
  • Publication number: 20150070438
    Abstract: A liquid ejection head includes a first recording element substrate, a second recording element substrate, and an electric wiring substrate. The first and second recording element substrates each includes an energy generating element that generates energy for ejecting a liquid, and an electroconductive protective film that is disposed so as to cover at least the energy generating element. The electric wiring substrate includes wiring for supplying electric power to the first and second recording element substrates. The electroconductive protective film of the first recording element substrate and the electroconductive protective film of the second recording element substrate are electrically connected to each other through the electric wiring substrate.
    Type: Application
    Filed: September 8, 2014
    Publication date: March 12, 2015
    Inventors: Kenji Yabe, Yasuhiko Osaki
  • Publication number: 20150070433
    Abstract: A liquid ejection apparatus includes an energy generating element that generates energy for ejecting a liquid; a plurality of electroconductive protective films that are disposed so as to cover at least the energy generating element and that are in contact with the liquid; and an electrifying unit that is capable of electrifying the plurality of electroconductive protective films in such a way that surfaces of the electroconductive protective films in contact with the liquid serve as anodes.
    Type: Application
    Filed: September 9, 2014
    Publication date: March 12, 2015
    Inventor: Kenji Yabe
  • Patent number: 8936350
    Abstract: A print head includes an energy generating element, a chamber for accommodating liquid, and an ejection opening for ejecting liquid from the chamber, thus applying the energy to the liquid in the chamber from the energy generating element to eject the liquid from the ejection opening, wherein the ejection opening includes at least two projections convex to an inside of the ejection opening in a cross section perpendicular to a liquid ejecting direction and has a tapered angle ?1 in regard to the liquid ejecting direction, enabling a meniscus of the liquid to be formed therebetween at the liquid ejecting time, and an outer edge portion has a tapered angle ?2 in regard to the liquid ejecting direction, wherein the tapered angles ?1 and ?2 are defined to meet a formula of 0°??1?10° and a formula of ?2>?1.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: January 20, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasunori Takei, Kenji Yabe, Takuma Kodoi, Ken Ikegame, Isamu Horiuchi, Hyou Takahashi
  • Patent number: 8827422
    Abstract: Without being dependent on design changes, a liquid ejection head and a method of production thereof are provided in which when time-division driving, liquid drop landing deviance in the direction of printing is capable of being corrected. In order to achieve this, before performing an exposure in order to form an ejection port, after forming a cavity that is shifted with respect to the location at which the ejection port is formed, exposure is performed.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: September 9, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuma Kodoi, Yasunori Takei, Kenji Yabe, Isamu Horiuchi, Hyo Takahashi, Ken Ikegame
  • Patent number: 8794745
    Abstract: A liquid ejection method is effected in a liquid ejection head that includes an ejection orifice for ejecting a liquid, a flow path for supplying the liquid from a liquid supply port to the ejection orifice, and a heat generating element. The heat generating element is rectangular with a long-side to short-side ratio of 2.5 or more for generating thermal energy used to eject the liquid, and a longitudinal direction of the heat generating element is arranged along an extending direction of the flow path. An end portion of the heat generating element on a downstream side with respect to a liquid flowing direction within the flow path is located between an end portion of the ejection orifice on the downstream side and an end portion of the ejection orifice on an upstream side when viewed from a direction in which the liquid is ejected from the ejection orifice.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: August 5, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Yamane, Tomoyuki Inoue, Eisuke Nishitani, Kenji Yabe, Atsushi Sakamoto
  • Patent number: 8785110
    Abstract: A liquid ejection head is manufactured by forming a dent representing a substantially spherical profile so as to include a position for forming an ejection port on a surface of a photosensitive resin layer, then forming a latent image of the ejection port in the dent by an exposure treatment using a projection lens system, and developing the latent image. The center of the top surface of the latent image is shifted to the incoming side of the beam of exposure light from the lowest point of the dent.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: July 22, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuma Kodoi, Yasunori Takei, Kenji Yabe, Isamu Horiuchi, Hyou Takahashi, Ken Ikegame