Patents by Inventor Yoshie Asakawa

Yoshie Asakawa 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: 6851779
    Abstract: A Liquid ejecting method for ejecting liquid using a bubble, includes using a liquid ejecting head having an ejection outlet for ejecting the liquid, a bubble generating region where a bubble is generated in the liquid, a movable member which is disposed faced to the bubble generating region, and which is displaceable between a first position and a second position farther from the bubble generating region than the first position and which has a free end at a downstream side thereof; displacing the movable member from the first position to the second position by pressure based on generation of the bubble in the bubble generating region, wherein the bubble expands more to the downstream side than to the upstream side with respect to a direction toward the ejection outlet by the displacement of the movable member, thus directing the bubble toward the ejection outlet to eject the liquid through the ejection outlet; and imparting an operation to the liquid ejecting head to normalize a state of the liquid in a liqu
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: February 8, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Okazaki, Toshio Kashino, Aya Yoshihira, Kiyomitsu Kudo, Yoshie Asakawa
  • Patent number: 6773092
    Abstract: A liquid discharging head has a heat generating member in which there is a bubbling region involved in the generation of the bubble. A center of the width of the heat generating member and a center of the width of an effective bubbling region with respect to a flow direction of the liquid are identical. The conditions of the bubble generation region are given as follows: the width of the effective bubbling region≦a width of the bubble generation region<the width of the heat generating member.
    Type: Grant
    Filed: July 7, 1997
    Date of Patent: August 10, 2004
    Inventors: Aya Yoshihira, Hiroyuki Ishinaga, Toshio Kashino, Kiyomitsu Kudo, Yoshie Asakawa
  • Publication number: 20040056929
    Abstract: A Liquid ejecting method for ejecting liquid using a bubble, includes using a liquid ejecting head having an ejection outlet for ejecting the liquid, a bubble generating region where a bubble is generated in the liquid, a movable member which is disposed faced to the bubble generating region, and which is displaceable between a first position and a second position farther from the bubble generating region than the first position and which has a free end at a downstream side thereof; displacing the movable member from the first position to the second position by pressure based on generation of the bubble in the bubble generating region, wherein the bubble expands more to the downstream side than to the upstream side with respect to a direction toward the ejection outlet by the displacement of the movable member, thus directing the bubble toward the ejection outlet to eject the liquid through the ejection outlet; and imparting an operation to the liquid ejecting head to normalize a state of the liquid in a liqu
    Type: Application
    Filed: September 8, 2003
    Publication date: March 25, 2004
    Applicant: CANON KABUSHIKI KASISHA
    Inventors: Takeshi Okazaki, Toshio Kashino, Aya Yoshihira, Kiyomitsu Kudo, Yoshie Asakawa
  • Patent number: 6709090
    Abstract: A Liquid ejecting method for ejecting liquid using a bubble, includes using a liquid ejecting head having an ejection outlet for ejecting the liquid, a bubble generating region where a bubble is generated in the liquid, a movable member which is disposed faced to the bubble generating region, and which is displaceable between a first position and a second position farther from the bubble generating region than the first position and which has a free end at a downstream side thereof; displacing the movable member from the first position to the second position by pressure based on generation of the bubble in the bubble generating region, wherein the bubble expands more to the downstream side than to the upstream side with respect to a direction toward the ejection outlet by the displacement of the movable member, thus directing the bubble toward the ejection outlet to eject the liquid through the ejection outlet; and imparting an operation to the liquid ejecting head to normalize a state of the liquid in a liqu
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: March 23, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Okazaki, Toshio Kashino, Aya Yoshihira, Kiyomitsu Kudo, Yoshie Asakawa
  • Patent number: 6663230
    Abstract: A liquid ejection head includes an ejection outlet for ejecting liquid; a bubble generating region for generating a bubble; a movable member disposed faced to the bubble generating region and movable between a first position and a second position which is farther form the bubble generating region than the first position; a liquid supply passage for supplying the liquid to the bubble generating region from upstream of the bubble generating region; an opening, in fluid communication with the supply passage, for discharging the liquid.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: December 16, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshie Asakawa, Toshio Kashino, Takeshi Okazaki, Aya Yoshihira, Kiyomitsu Kudo
  • Publication number: 20030174188
    Abstract: A Liquid ejecting method for ejecting liquid using a bubble, includes using a liquid ejecting head having an ejection outlet for ejecting the liquid, a babble generating region where a bubble is generated in the liquid, a movable member which is disposed faced to the bubble generating region, and which is displaceable between a first position and a second position farther from the bubble generating region than the first position and which has a free end at a downstream side thereof; displacing the movable member from the first position to the second position by pressure based on generation of the bubble in the bubble generating region, wherein the bubble expands more to the downstream side than to the upstream side with respect to a direction toward the ejection outlet by the displacement of the movable member, thus directing the bubble toward the ejection outlet to eject the liquid through the ejection outlet, and imparting an operation to the liquid ejecting head to normalize a state of the liquid in a liqu
    Type: Application
    Filed: September 20, 1996
    Publication date: September 18, 2003
    Inventors: TAKESHI OKAZAKI, TOSHIO KASHINO, AYA YOSHIHIRA, KIYOMITSU KUDO, YOSHIE ASAKAWA
  • Patent number: 6582065
    Abstract: A liquid ejection method including the steps of preparing a head comprising an ejection outlet, a bubble generation region, a movable member faced to the bubble generation region and displaceable from a first position to a second position further from the bubble generation region than the first position; displacing the movable member from the first position to the second position by pressure produced by the generation of the bubble to permit greater expansion of the bubble downstream as compared to upstream; and supplying a driving pulse to generate each bubble, wherein the pulse is divided into a first pulse for pre-heating the liquid and a second pulse for ejecting the liquid.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: June 24, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Okazaki, Toshio Kashino, Hiroshi Tajika, Kouichi Omata, Aya Yoshihira, Kiyomitsu Kudo, Masao Kato, Yoshie Asakawa, Hitoshi Tsuboi
  • Publication number: 20030085963
    Abstract: A liquid ejection head includes an ejection outlet for ejecting liquid; a bubble generating region for generating a bubble; a movable member disposed faced to the bubble generating region and movable between a first position and a second position which is farther form the bubble generating region than the first position; a liquid supply passage for supplying the liquid to the bubble generating region from upstream of the bubble generating region; an opening, in fluid communication with the supply passage, for discharging the liquid.
    Type: Application
    Filed: November 12, 2002
    Publication date: May 8, 2003
    Applicant: Canon Kabushiki Kaisha
    Inventors: Yoshie Asakawa, Toshio Kashino, Takeshi Okazaki, Aya Yoshihira, Kiyomitsu Kudo
  • Patent number: 6554383
    Abstract: The present invention realizes a liquid ejecting head with increased ejection force and ejection efficiency and also realizes a liquid ejecting head having compatibility with the conventional products, and a head cartridge and a recording system incorporating the liquid ejecting head. A liquid ejecting head or a head cartridge having an ejection outlet for ejecting a liquid, a liquid flow path in fluid communication with the ejection outlet, and an ejection energy generating element, provided corresponding to the liquid flow path, for receiving an electric signal to generate ejection energy, which comprises an energy adjusting device for adjusting an amount of energy supplied from the outside to the liquid ejecting head and utilized as the electric signal.
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: April 29, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Nagatomo, Mikio Shiga, Hiroyuki Ishinaga, Shinya Matsui, Toshio Kashino, Hiroshi Tajika, Tetsushi Kohno, Yoshie Asakawa
  • Patent number: 6523941
    Abstract: A liquid discharging method which employs a liquid discharging head consisting of a liquid discharging port, a bubble generating region where the bubble generates in the liquid and a movable member that can move between a first position and a second position which is located at a point farther from the bubble generating region compared with the first position, wherein the movable member moves from the first position to the second position by the pressure of the bubble generated by the bubble generating energy in the bubble generating region, and at the same time the bubble expands farther toward the downstream direction compared with the upstream direction by the displacement of the movable member in order to discharge the liquid out of the liquid discharging port by the liquid discharging energy applied to such liquid.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: February 25, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshie Asakawa, Hiroyuki Ishinaga, Toshio Kashino, Aya Yoshihira, Kiyomitsu Kudo
  • Patent number: 6516509
    Abstract: A method for manufacturing a component provided with a number of liquid paths having movable members for use of liquid discharging comprises the steps of displacing the movable members provided for thin film material by use of such thin film material having the movable members on it, and a component provided with a plurality of recessed portions, and of placing the movable members, which are in the state of being displaced with respect to the recessed portions of the component correspondingly, hence making it possible to fabricate a liquid jet head without damaging or deforming such thin film material constituting the movable members. With the provision of the movable members, the discharging power and efficiency of the liquid jet head are significantly enhanced to obtain recorded images of high quality at higher speeds.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: February 11, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takayuki Ono, Koji Yamakawa, Tsuyoshi Orikasa, Toshio Kashino, Hiroyuki Kigami, Kimiyuki Hayasaki, Hisashi Fukai, Kiyomitsu Kudo, Yoshie Asakawa, Masayoshi Ohkawa
  • Patent number: 6505915
    Abstract: A liquid ejection head includes an ejection outlet for ejecting liquid; a bubble generating region for generating a bubble; a movable member disposed faced to the bubble generating region and movable between a first position and a second position which is farther form the bubble generating region than the first position; a liquid supply passage for supplying the liquid to the bubble generating region from upstream of the bubble generating region; an opening, in fluid communication with the supply passage, for discharging the liquid.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: January 14, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshie Asakawa, Toshio Kashino, Takeshi Okazaki, Aya Yoshihira, Kiyomitsu Kudo
  • Publication number: 20020186282
    Abstract: A liquid discharging method which employs a liquid discharging head consisting of a liquid discharging port, a bubble generating region where the bubble generates in the liquid and a movable member that can move between a first position and a second position which is located at a point farther from the bubble generating region compared with the first position, wherein the movable member moves from the first position to the second position by the pressure of the bubble generated by the bubble generating energy in the bubble generating region, and at the same time the bubble expands farther toward the downstream direction compared with the upstream direction by the displacement of the movable member in order to discharge the liquid out of the liquid discharging port by the liquid discharging energy applied to such liquid.
    Type: Application
    Filed: July 9, 1997
    Publication date: December 12, 2002
    Inventors: YOSHIE ASAKAWA, HIROYUKI ISHINAGA, TOSHIO KASHINO, AYA YOSHIHARA, KIYOMITSU KUDO
  • Patent number: 6488365
    Abstract: A liquid discharging head includes a discharge port for discharging liquid, a liquid passage communicated with the discharge port, a bubble generating area for generating a bubble in the liquid in the liquid passage, the bubble generating area including a heater for heating the liquid in the liquid passage, and a movable member disposed in a confronting relation to the bubble generating area in the liquid passage and adapted to be shifted by pressure caused by generating the bubble at the bubble generating area to direct the pressure toward the discharge port and to be returned to its initial position by negative pressure due to contraction of the bubble, and wherein resistance of the movable member against the liquid in the liquid passage when it is shifted is smaller than that when it is returned.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: December 3, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kiyomitsu Kudo, Yutaka Koizumi, Sadayuki Sugama, Kiyomi Aono, Tsutomu Abe, Hiroyuki Ishinaga, Toshio Kashino, Seiichiro Karita, Takeshi Okazaki, Kouichi Omata, Masahiko Kubota, Hiroki Tajima, Aya Yoshihira, Yoshie Asakawa
  • Patent number: 6474791
    Abstract: There is disclosed a liquid discharging method and apparatus in which a bubble is formed and grown in the liquid communicated with atmosphere at an area of a discharge opening, and in which a movable member having a free end which guides the bubble toward the discharge opening while regulating growth of the bubble.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: November 5, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Ishinaga, Sadayuki Sugama, Toshio Kashino, Takeshi Okazaki, Aya Yoshihira, Kiyomitsu Kudo, Yoshie Asakawa
  • Patent number: 6447093
    Abstract: A liquid discharge head comprises discharge ports for discharging the liquid, a bubble producing area for producing an air bubble in the liquid of liquid flow channels, and a movable member, which is disposed toward the bubble producing area, and displaceable between a first position and a second position farther away from the bubble producing area than the first position, the liquid discharge head discharging the liquid in such a manner that the movable member is displaced from the first position to the second position by a pressure due to a bubble produced in the bubble producing area, and the bubble is more greatly expanded downstream than upstream in a direction toward the discharge port, due to the displacement of the movable member. The head has a check valve disposed in a liquid supply passage leading to the liquid flow channels.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: September 10, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshie Asakawa, Hiroyuki Ishinaga, Toshio Kashino, Akira Nagashima, Aya Yoshihira, Kiyomitsu Kudo, Yoichi Taneya
  • Patent number: 6390604
    Abstract: A liquid discharge method for discharging a liquid through a discharge port for discharging the liquid utilizing a bubble by displacing a movable separation film for always substantially separating a first liquid flow path in communication with said discharge port for discharging the liquid from a second liquid flow path comprising a bubble-generating region for generating the bubble in said liquid, on the upstream side of said discharge port with respect to flow of the liquid in said first liquid flow path, comprises a step of displacing a downstream portion of said movable separation film toward said discharge port relatively more than an upstream portion of said movable separation film with respect to a direction of the flow of the liquid.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: May 21, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshio Kashino, Hiroyuki Ishinaga, Aya Yoshihira, Kiyomitsu Kudo, Yoshie Asakawa, Yoichi Taneya, Hiroyuki Sugiyama, Satoshi Shimazu
  • Publication number: 20020041296
    Abstract: The present invention realizes a liquid ejecting head with increased ejection force and ejection efficiency and also realizes a liquid ejecting head having compatibility with the conventional products, and a head cartridge and a recording system incorporating the liquid ejecting head.
    Type: Application
    Filed: October 2, 2001
    Publication date: April 11, 2002
    Inventors: Akira Nagatomo, Mikio Shiga, Hiroyuki Ishinaga, Shinya Matsui, Toshio Kashino, Hiroshi Tajika, Tetsushi Kohno, Yoshie Asakawa
  • Publication number: 20020033865
    Abstract: The present invention provides a liquid discharging method in which communication between a bubble and atmosphere out of a discharge opening is optimized while improving liquid discharging efficiency, a liquid discharge amount or a liquid discharging speed, a liquid discharging head for carrying out such a method, and a recording apparatus using such liquid discharging head. A discharging method for discharging liquid by communicating a bubble formed and grown in the liquid with atmosphere at an area of a discharge opening, according to the present invention, comprising the step of causing displacement of a movable member having a free end for guiding the bubble toward the discharge opening while regulating the growth of the bubble, in accordance with the growth of the bubble.
    Type: Application
    Filed: January 26, 2001
    Publication date: March 21, 2002
    Inventors: Hiroyuki Ishinaga, Sadayuki Sugama, Toshio Kashino, Takeshi Okazaki, Aya Yoshihira, Kiyomitsu Kudo, Yoshie Asakawa
  • Publication number: 20020030721
    Abstract: A liquid discharge head comprises discharge ports for discharging the liquid, a bubble producing area for producing an air bubble in the liquid of liquid flow channels, and a movable member, which is disposed toward the bubble producing area, and displaceable between a first position and a second position farther away from the bubble producing area than the first position, the liquid discharge head discharging the liquid in such a manner that the movable member is displaced from the first position to the second position by a pressure due to a bubble produced in the bubble producing area, and the bubble is more greatly expanded downstream than upstream in a direction toward the discharge port, due to the displacement of the movable member. The head has a check valve disposed in a liquid supply passage leading to the liquid flow channels.
    Type: Application
    Filed: July 10, 1997
    Publication date: March 14, 2002
    Inventors: YOSHIE ASAKAWA, HIROYUKI ISHINAGA, TOSHIO KASHINO, AKIRA NAGASHIMA, AYA YOSHIHIRA, KIYOMITSU KUDO, YOICHI TANEYA