Patents by Inventor Atsuhiro Takagi

Atsuhiro Takagi 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: 7753506
    Abstract: An ink cartridge includes a first surface, second surface opposite the first surface, an ink chamber, and a grip part extending from the second surface. The ink cartridge includes a first communication chamber extending from the ink chamber toward the first surface, a first valve device disposed within the first communication chamber, a second communication chamber extending from the ink chamber toward the first surface, and a second valve device disposed within the second communication chamber.
    Type: Grant
    Filed: July 5, 2007
    Date of Patent: July 13, 2010
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Toyonori Sasaki, Shingo Hattori, Tomohiro Kanbe, Atsuhiro Takagi
  • Patent number: 7513612
    Abstract: A protector for use with an ink cartridge. The ink cartridge includes an ink chamber which stores an ink; an ink supply hole through which the ink is supplied from the ink chamber to an outside of the ink cartridge and which opens in a hole-open portion of an outer surface of the ink cartridge; and a valve member which is provided between the ink chamber and the ink supply hole, which selectively permits the ink to flow from the ink chamber to the ink supply hole and inhibits the ink from flowing from the ink chamber to the ink supply hole, and which communicates with the outside via the ink supply hole. The protector includes a main portion including an engaging portion which is adapted to engage a portion of the ink cartridge so that the protector is detachably attached to the ink cartridge. The main portion has a rigidity assuring that the main portion can substantially maintain an original shape thereof.
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: April 7, 2009
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Atsuhiro Takagi
  • Patent number: 7384136
    Abstract: An ink cartridge includes an ink chamber, a communication chamber that is capable of communicating with the ink chamber and an outside of the ink cartridge, a valve disposed within the communication chamber that is capable of moving from a first position where a communication between the ink chamber and the outside of the ink cartridge is blocked, to a second position where the communication is allowed, and an operation member that extends from the communication chamber to the outside of the ink cartridge and is capable of moving the valve from the first position to the second position.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: June 10, 2008
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Atsuhiro Takagi, Toyonori Sasaki, Shingo Hattori, Tomohiro Kanbe
  • Patent number: 7350909
    Abstract: An ink cartridge includes a first detection portion positioned on the cartridge so as to be detectable by a detector of an image forming apparatus when the ink cartridge is installed in the image forming apparatus and a second detection portion positioned on the cartridge so as to be detectable by the detector during installation and removal of the ink cartridge into/from the image forming apparatus. The second detection portion is positioned apart from the first detection portion toward a surface of the ink cartridge that is first inserted into the image forming apparatus during installation of the ink cartridge in the image forming apparatus. Image forming apparatuses compatible with such ink cartridges are also provided.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: April 1, 2008
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Atsuhiro Takagi, Toyonori Sasaki
  • Patent number: 7334889
    Abstract: An ink cartridge includes a case having a bottom wall and side walls forming an ink chamber, with a top surface of the case being open, an air introduction opening formed in the bottom wall of the case that introduces air into the ink chamber, and a hollow member that is in direct communication with the air introduction opening, wherein the hollow member is formed integrally with and extends from the bottom wall of the case towards the top surface in a first direction, and an upper end of the hollow member is open.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: February 26, 2008
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Toyonori Sasaki, Shingo Hattori, Tomohiro Kanbe, Atsuhiro Takagi
  • Patent number: 7334888
    Abstract: An ink cartridge includes an ink chamber; a communication chamber that is capable of communicating with the ink chamber; a valve that is movable; a support disposed within the communication chamber, the support including a valve seat and an opening exposing a bottom of the valve at an approximately central portion, wherein the valve seat is adjacent to the valve at an outer periphery of the opening; and an urging device that extends from the valve seat, the urging device directly contacting the valve and urging the valve toward the valve seat, wherein the valve separates from the valve seat when a predetermined force is applied to the valve and the support and the urging device are formed as a one-piece member.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: February 26, 2008
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Toyonori Sasaki, Shingo Hattori, Tomohiro Kanbe, Atsuhiro Takagi
  • Patent number: 7325913
    Abstract: An ink cartridge, includes an ink chamber capable of storing ink, an opening in a bottom surface of the ink cartridge, through which the ink may be supplied from the ink chamber to an image forming device, a first side wall, a second side wall opposite from the first side wall, a front wall, and a back wall opposite the front wall, wherein a first distance between the first side wall and the second side wall is greater than a second distance between the front wall and the back wall, at least one of the front wall or the back wall includes a recess, which protrudes inwardly with respect to adjacent regions of the at least one of the front wall or the back wall, a third distance from the bottom surface to the top of the recess is more than about 4.5 mm, and a fourth distance from the adjacent regions of the at least one of the front wall or the back ball and an end of the recess is less than about 3 mm.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: February 5, 2008
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Toyonori Sasaki, Shingo Hattori, Tomohiro Kanbe, Atsuhiro Takagi
  • Publication number: 20070273736
    Abstract: An ink cartridge includes an ink chamber; a communication chamber that is capable of communicating with the ink chamber; a valve that is movable; a support disposed within the communication chamber, the support including a valve seat and an opening exposing a bottom of the valve at an approximately central portion, wherein the valve seat is adjacent to the valve at an outer periphery of the opening; and an urging device that extends from the valve seat, the urging device directly contacting the valve and urging the valve toward the valve seat, wherein the valve separates from the valve seat when a predetermined force is applied to the valve and the support and the urging device are formed as a one-piece member.
    Type: Application
    Filed: July 5, 2007
    Publication date: November 29, 2007
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Toyonori Sasaki, Shingo Hattori, Tomohiro Kanbe, Atsuhiro Takagi
  • Patent number: 7278722
    Abstract: An ink cartridge includes an ink chamber, an air introduction opening that introduces air inside the ink chamber, a first sealing member that is capable of blocking and allowing communication between the air introduction opening and an area outside of the ink cartridge, an ink supply opening that supplies ink from the ink chamber, a second sealing member that is capable of blocking and allowing communication between the ink supply opening and the area outside of the ink cartridge, and a check valve provided between the second sealing member and the ink chamber, wherein the check valve blocks a flow of the ink in the ink supply opening from the area outside of the ink supply opening toward the ink chamber.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: October 9, 2007
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Toyonori Sasaki, Atsuhiro Takagi, Shingo Hattori, Tomohiro Kanbe
  • Publication number: 20060103702
    Abstract: A protector for use with an ink cartridge. The ink cartridge includes an ink chamber which stores an ink; an ink supply hole through which the ink is supplied from the ink chamber to an outside of the ink cartridge and which opens in a hole-open portion of an outer surface of the ink cartridge; and a valve member which is provided between the ink chamber and the ink supply hole, which selectively permits the ink to flow from the ink chamber to the ink supply hole and inhibits the ink from flowing from the ink chamber to the ink supply hole, and which communicates with the outside via the ink supply hole. The protector includes a main portion including an engaging portion which is adapted to engage a portion of the ink cartridge so that the protector is detachably attached to the ink cartridge. The main portion has a rigidity assuring that the main portion can substantially maintain an original shape thereof.
    Type: Application
    Filed: November 16, 2005
    Publication date: May 18, 2006
    Applicant: Brother Kogyo Kabushiki Kaisha
    Inventor: Atsuhiro Takagi
  • Patent number: 6964472
    Abstract: An ink jet print head includes a cavity plate having a plurality of nozzles and a plurality of pressure chambers communicating with the respective nozzles, and a plate-like piezoelectric actuator, in which piezoelectric sheets having a plurality of electrodes formed at positions with respect to the pressure chambers are stacked one after another. The piezoelectric actuator is bonded to the cavity plate so as to close the pressure chambers in the cavity plate. Each of the piezoelectric sheets has a thickness of between 5-40 ?m, preferably between 15-30 ?m. Surface electrodes, which electrically connect one of the electrodes, are provided at both end portions of a surface of the piezoelectric actuator, which is opposed to a surface to be bonded to the cavity plate. Protrusions having a thickness of the surface electrodes are provided between the surface electrodes on the surface of the piezoelectric actuator.
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: November 15, 2005
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Atsuhiro Takagi, Jun Isono
  • Publication number: 20050195225
    Abstract: An ink cartridge includes a first detection portion positioned on the cartridge so as to be detectable by a detector of an image forming apparatus when the ink cartridge is installed in the image forming apparatus and a second detection portion positioned on the cartridge so as to be detectable by the detector during installation and removal of the ink cartridge into/from the image forming apparatus. The second detection portion is positioned apart from the first detection portion toward a surface of the ink cartridge that is first inserted into the image forming apparatus during installation of the ink cartridge in the image forming apparatus. Image forming apparatuses compatible with such ink cartridges are also provided.
    Type: Application
    Filed: February 24, 2005
    Publication date: September 8, 2005
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Atsuhiro Takagi, Toyonori Sasaki
  • Publication number: 20050195254
    Abstract: Methods for filling an ink cartridges having a cartridge body including an ink tank, an ink inflow passage that communicates with the ink tank at a first end through a first opening and that communicates with an exterior of the ink cartridge at a second end through a second opening, and a sealing member that is positioned in the ink inflow passage, are provided. An ink cartridge includes a cartridge body, an ink tank formed in the cartridge body for storing ink, and an ink inflow passage formed in the cartridge body for filling the cartridge. The ink inflow passage communicates with the ink tank at a first end through a first opening and communicates with an exterior of the cartridge at a second end through a second opening, the ink inflow passage includes a first region adjacent to the first opening and a second region adjacent to the second opening, and the first region has a smaller diameter than the second region.
    Type: Application
    Filed: March 2, 2005
    Publication date: September 8, 2005
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Atsuhiro Takagi, Toyonori Sasaki
  • Publication number: 20050151812
    Abstract: An ink cartridge, includes an ink chamber capable of storing ink, an opening in a bottom surface of the ink cartridge, through which the ink may be supplied from the ink chamber to an image forming device, a first side wall, a second side wall opposite from the first side wall, a front wall, and a back wall opposite the front wall, wherein a first distance between the first side wall and the second side wall is greater than a second distance between the front wall and the back wall, at least one of the front wall or the back wall includes a recess, which protrudes inwardly with respect to adjacent regions of the at least one of the front wall or the back wall, a third distance from the bottom surface to the top of the recess is more than about 4.5 mm, and a fourth distance from the adjacent regions of the at least one of the front wall or the back ball and an end of the recess is less than about 3 mm.
    Type: Application
    Filed: December 30, 2004
    Publication date: July 14, 2005
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Toyonori Sasaki, Shingo Hattori, Tomohiro Kanbe, Atsuhiro Takagi
  • Publication number: 20050146577
    Abstract: An ink cartridge includes a case having a bottom wall and side walls forming an ink chamber, with a top surface of the case being open, an air introduction opening formed in the bottom wall of the case that introduces air into the ink chamber, and a hollow member that is in direct communication with the air introduction opening, wherein the hollow member is formed integrally with and extends from the bottom wall of the case towards the top surface in a first direction, and an upper end of the hollow member is open.
    Type: Application
    Filed: February 9, 2005
    Publication date: July 7, 2005
    Applicant: Brother Kogyo Kabushiki Kaisha
    Inventors: Toyonori Sasaki, Shingo Hattori, Tomohiro Kanbe, Atsuhiro Takagi
  • Publication number: 20050134663
    Abstract: An ink cartridge includes an ink chamber; a communication chamber that is capable of communicating with the ink chamber; a valve that is movable; a support disposed within the communication chamber, the support including a valve seat and an opening exposing a bottom of the valve at an approximately central portion, wherein the valve seat is adjacent to the valve at an outer periphery of the opening; and an urging device that extends from the valve seat, the urging device directly contacting the valve and urging the valve toward the valve seat, wherein the valve separates from the valve seat when a predetermined force is applied to the valve and the support and the urging device are formed as a one-piece member.
    Type: Application
    Filed: November 19, 2004
    Publication date: June 23, 2005
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Toyonori Sasaki, Shingo Hattori, Tomohiro Kanbe, Atsuhiro Takagi
  • Publication number: 20040155944
    Abstract: An ink jet print head includes a cavity plate having a plurality of nozzles and a plurality of pressure chambers communicating with the respective nozzles, and a plate-like piezoelectric actuator, in which piezoelectric sheets having a plurality of electrodes formed at positions with respect to the pressure chambers are stacked one after another. The piezoelectric actuator is bonded to the cavity plate so as to close the pressure chambers in the cavity plate. Each of the piezoelectric sheets has a thickness of between 5-40 &mgr;m, preferably between 15-30 &mgr;m. Surface electrodes, which electrically connect one of the electrodes, are provided at both end portions of a surface of the piezoelectric actuator, which is opposed to a surface to be bonded to the cavity plate. Protrusions having a thickness of the surface electrodes are provided between the surface electrodes on the surface of the piezoelectric actuator.
    Type: Application
    Filed: February 4, 2004
    Publication date: August 12, 2004
    Applicant: Brother Kogyo Kabushiki Kaisha
    Inventors: Atsuhiro Takagi, Jun Isono
  • Patent number: 6715862
    Abstract: An ink jet print head includes a cavity plate having a plurality of nozzles and a plurality of pressure chambers communicating with the respective nozzles, and a plate-like piezoelectric actuator, in which piezoelectric sheets having a plurality of electrodes formed at positions with respect to the pressure chambers are stacked one after another. The piezoelectric actuator is bonded to the cavity plate so as to close the pressure chambers in the cavity plate. Each of the piezoelectric sheets has a thickness of between 5-40 &mgr;m, preferably between 15-30 &mgr;m. Surface electrodes, which electrically connect one of the electrodes, are provided at both end portions of a surface of the piezoelectric actuator, which is opposed to a surface to be bonded to the cavity plate. Protrusions having a thickness of the surface electrodes are provided between the surface electrodes on the surface of the piezoelectric actuator.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: April 6, 2004
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Atsuhiro Takagi, Jun Isono
  • Patent number: 6648455
    Abstract: An ink impermeable and electrically insulative adhesive sheet is pasted to the lower surface of a piezoelectric actuator, which is constructed by laminating alternately a piezoelectric sheet with individual electrodes and a piezoelectric sheet with a common electrode. Then, the piezoelectric actuator is bonded to a cavity plate by the aid of the adhesive sheet such that the individual electrodes of the piezoelectric actuator are aligned with pressure chambers of the cavity plate. In this construction, electrical insulation between the piezoelectric sheets is not damaged by ink in the pressure chambers of the cavity plate.
    Type: Grant
    Filed: August 21, 2001
    Date of Patent: November 18, 2003
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Atsuhiro Takagi
  • Patent number: 6631981
    Abstract: Odd-numbered piezoelectric sheets 22, 21b, 21d, and 21f are formed with a plurality of individual electrodes 24. Even-numbered piezoelectric sheets 21a, 21c, 21e, and 21g are formed with a common electrode 25. These odd-numbered and even-numbered piezoelectric sheets are alternatively arranged one on the other to form a laminated body. A top sheet 23 is mounted on the laminated body. Surface electrodes 30, 31 are formed on the top sheet 23. Through holes 32, 33 are opened to the piezoelectric sheets 21a through 21g for providing electrical connection of the individual electrodes 24 and the common electrodes 25, but not to the piezoelectric sheet 22 that is laminated on a cavity plate 10.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: October 14, 2003
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Jun Isono, Atsuhiro Takagi