Patents by Inventor Keiichiro Tsukuda

Keiichiro Tsukuda 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: 6152555
    Abstract: An ink container, containing different inks for recording, detachably mountable in an opening of an ink container holder, the ink container including a claw-like projection for engagement with a first hole provided in an inner surface of the opening adjacent one end thereof; a latch claw for engagement with a second hole provided in an inner surface of the opening adjacent the other end thereof, the latch claw being provided on a latch lever resiliently supported on the ink container; a projection corresponding to a guiding member provided on an inside of each of side walls of the container holder, which side walls connect the one end and the other end of the ink container holder, the projection being provided on each lateral side at a front portion in a mounting direction of the ink container; wherein the ink container is mounted in the ink container holder by rotating the ink container after being guided by the guiding members; a plurality of ink supply ports in a bottom surface, wherein at least one portio
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: November 28, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Minoru Nozawa, Keiichiro Tsukuda
  • Patent number: 6102533
    Abstract: An ink container, containing different inks for recording, detachably mountable in an opening of an ink container holder, the ink container including a claw-like projection for engagement with a first hole provided in an inner surface of the opening adjacent one end thereof; a latch claw for engagement with a second hole provided in an inner surface of the opening adjacent the other end thereof, the latch claw being provided on a latch lever resiliently supported on the ink container; a projection corresponding to a guiding member provided on an inside of each of side walls of the container holder, which side walls connect the one end and the other end of the ink container holder, the projection being provided on each lateral side at a front portion in a mounting direction of the ink container; wherein the ink container is mounted in the ink container holder by rotating the ink container after being guided by the guiding members; a plurality of ink supply ports in a bottom surface, wherein at least one portio
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: August 15, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Minoru Nozawa, Keiichiro Tsukuda
  • Patent number: 5988804
    Abstract: An ink jet head cartridge having a recording head without an ink container includes a casing with an ink ejection device; and a structural member on the casing for improving handling of the recording head.
    Type: Grant
    Filed: October 19, 1993
    Date of Patent: November 23, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuo Kotaki, Kouji Yamakawa, Keiichiro Tsukuda
  • Patent number: 5900889
    Abstract: An ink-jet recording apparatus using a detachable ink-jet recording head for ejecting ink and a detachable ink container for containing ink to be supplied to the recording head includes: a recovery device for recovering a condition for ejecting ink for the ink-jet recording head; a detection device for detecting a replacement of the ink container or a refilling thereof with ink; a counting device for counting the number of times N that recovery is executed by the recovery device; a measurement device for measuring a period of time elapsing between the time t0 at which last ink ejection was finished and the time at which ink ejection is newly performed; and a control device for controlling the recovery device according to detection result by the detection device, counting result by the counting device and measurement result by the measurement device.
    Type: Grant
    Filed: July 27, 1995
    Date of Patent: May 4, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keiichiro Tsukuda
  • Patent number: 5784088
    Abstract: An ink cartridge (3) including an ink reservoir portion having a porous member (37) for storing ink and an ink supply portion (39) has an ink inducing element (47) disposed between the ink reservoir portion and the ink-supply portion (39). The ink inducing element (47) is made of bundle of fibers in which each fiber is disposed in parallel to the direction of ink supplying from the ink reservoir to the ink supply portion (39), and one end of the ink inducing element (47) is press-touched to the porous member (37).
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: July 21, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshihiko Ujita, Masanori Takenouchi, Keiichiro Tsukuda
  • Patent number: 5781213
    Abstract: A liquid storing container, having a liquid feed portion for supplying liquid to a liquid injection recording apparatus, includes a rectangular receiving case for a porous member, and a filter that compresses the porous member. The liquid storing container provides for controlled feeding of liquid through a contact portion where the filter compresses the porous member, and a proper balance of air and liquid is achieved by symmetrical surfaces located within the receiving case.
    Type: Grant
    Filed: December 2, 1996
    Date of Patent: July 14, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshihiko Ujita, Koji Yamakawa, Masanori Takenouchi, Sadayuki Sugama, Kenjiro Watanabe, Torachika Osada, Kazuhiro Nakajima, Takayoshi Tsutsumi, Hidemi Kubota, Yasuo Kotaki, Keiichiro Tsukuda, Yohei Sato
  • Patent number: D383155
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: September 2, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Tashiro, Akihiro Yamanaka, Keiichiro Tsukuda
  • Patent number: D383157
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: September 2, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Tashiro, Akihiro Yamanaka, Keiichiro Tsukuda
  • Patent number: D383158
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: September 2, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Tashiro, Akihiro Yamanaka, Keiichiro Tsukuda
  • Patent number: D390868
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: February 17, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Tashiro, Akihiro Yamanaka, Keiichiro Tsukuda
  • Patent number: D390870
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: February 17, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Tashiro, Akihiro Yamanaka, Keiichiro Tsukuda
  • Patent number: D392670
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: March 24, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Tashiro, Akihiro Yamanaka, Keiichiro Tsukuda
  • Patent number: D395446
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: June 23, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Tashiro, Akihiro Yamanaka, Keiichiro Tsukuda
  • Patent number: D401620
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: November 24, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Minoru Nozawa, Keiichiro Tsukuda, Hisakazu Shimizu
  • Patent number: D401621
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: November 24, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisakazu Shimizu, Minoru Nozawa, Keiichiro Tsukuda
  • Patent number: D406163
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: February 23, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisakazu Shimizu, Minoru Nozawa, Keiichiro Tsukuda
  • Patent number: D412526
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: August 3, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisakazu Shimizu, Minoru Nozawa, Keiichiro Tsukuda
  • Patent number: D413920
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: September 14, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisakazu Shimizu, Minoru Nozawa, Keiichiro Tsukuda
  • Patent number: D414509
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: September 28, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisakazu Shimizu, Minoru Nozawa, Keiichiro Tsukuda
  • Patent number: D425932
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: May 30, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisakazu Shimizu, Minoru Nozawa, Keiichiro Tsukuda