Patents by Inventor Keitaroh Sakai

Keitaroh Sakai 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: 10518547
    Abstract: A liquid discharger includes a head including nozzles to discharge liquid from the nozzles, a detachable first container attached to the liquid discharger to accommodate the liquid, a second container connected to the head to accommodate the liquid to be supplied to the head, a supply channel to connect the first container and the second container, an irreversible pump connected to the second container, and a controller to control the irreversible pump to pressurize and decompress the second container to reciprocally move the liquid between the first detachable container and the second container via the supply channel.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: December 31, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keitaroh Sakai, Nobuyuki Akaishi, Shigeru Morinaga
  • Patent number: 10124617
    Abstract: A liquid stirrer includes a removable first liquid container to contain a liquid; a second liquid container having a capacity less than that of the first liquid container; a fluid path between the first liquid container and the second liquid container; a reversible pump disposed on the fluid path; a sensor to detect an amount of the liquid inside the second liquid container, in which the liquid reciprocally moves between the first liquid container and the second liquid container; and a controller to control the reversible pump, based on readings from the sensor, such that a moving amount of the liquid does not exceed the capacity of the second liquid container and that the second container does not go empty.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: November 13, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keitaroh Sakai, Nobuyuki Akaishi
  • Patent number: 9849678
    Abstract: A liquid discharger includes a head to discharge liquid droplets, a cap to cover a nozzle face of the head; a cap mover to move the cap to a capping position at which the cap faces the nozzle face of the head or to move the cap to an evacuation position at which the cap does not face the nozzle face of the head. Further, there is a belt arranged to face and clean the cap at the evacuation position, the belt having a width and length enough to cover whole area of a rim of the cap; a conveyer to drive the belt, and a belt cleaner which faces the belt to clean the belt.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: December 26, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keitaroh Sakai, Toshitaka Osanai, Nobuyuki Akaishi, Shigeru Morinaga
  • Publication number: 20170341407
    Abstract: A liquid discharger includes a head including nozzles to discharge liquid from the nozzles, a detachable first container attached to the liquid discharger to accommodate the liquid, a second container connected to the head to accommodate the liquid to be supplied to the head, a supply channel to connect the first container and the second container, an irreversible pump connected to the second container, and a controller to control the irreversible pump to pressurize and decompress the second container to reciprocally move the liquid between the first detachable container and the second container via the supply channel.
    Type: Application
    Filed: May 2, 2017
    Publication date: November 30, 2017
    Applicant: RICOH COMPANY, LTD.
    Inventors: Keitaroh SAKAI, Nobuyuki AKAISHI, Shigeru MORINAGA
  • Publication number: 20170100936
    Abstract: A liquid discharger includes a head to discharge liquid droplets, a cap to cover a nozzle face of the head; a cap mover to move the cap to a capping position at which the cap faces the nozzle face of the head or to move the cap to an evacuation position at which the cap does not face the nozzle face of the head. Further, there is a belt arranged to face and clean the cap at the evacuation position, the belt having a width and length enough to cover whole area of a rim of the cap; a conveyer to drive the belt, and a belt cleaner which faces the belt to clean the belt.
    Type: Application
    Filed: September 30, 2016
    Publication date: April 13, 2017
    Inventors: Keitaroh SAKAI, Toshitaka OSANAI, Nobuyuki AKAISHI, Shigeru MORINAGA
  • Publication number: 20150360190
    Abstract: A liquid stirrer includes a removable first liquid container to contain a liquid; a second liquid container having a capacity less than that of the first liquid container; a fluid path between the first liquid container and the second liquid container; a reversible pump disposed on the fluid path; a sensor to detect an amount of the liquid inside the second liquid container, in which the liquid reciprocally moves between the first liquid container and the second liquid container; and a controller to control the reversible pump, based on readings from the sensor, such that a moving amount of the liquid does not exceed the capacity of the second liquid container and that the second container does not go empty.
    Type: Application
    Filed: June 3, 2015
    Publication date: December 17, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Keitaroh Sakai, Nobuyuki Akaishi