Patents by Inventor Masanao Matsuzawa
Masanao Matsuzawa 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).
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Patent number: 6231248Abstract: An ink-supplied wire dot matrix printer head for actuating wires with ink attached to tip ends thereof into contact with a sheet of print paper to transfer ink to the sheet, thereby forming ink dots thereon. The ink-supplied wire dot matrix printer head includes a wire guide member having a wire guide hole for guiding the tip end of the wire, and an ink tank containing an ink absorbing body therein and having an ink supply port in which a portion of the wire guide member is inserted. The wire guide member has a capillary ink path communicating with a side of the wire and supplied with ink from the ink absorbing body.Type: GrantFiled: September 27, 1996Date of Patent: May 15, 2001Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 6224275Abstract: An ink-supplied wire dot matrix printer head for actuating wires with ink attached to tip ends thereof into contact with a sheet of print paper to transfer ink to the sheet, thereby forming ink dots thereon. The ink-supplied wire dot matrix printer head includes a wire guide member having a wire guide hole for guiding the tip end of the wire, and an Ink tank containing an ink absorbing body therein and having an ink supply port in which a portion of the wire guide member is inserted. The wire guide member has a capillary ink path communicating with a side of the wire and supplied with ink from the ink absorbing body.Type: GrantFiled: December 8, 1999Date of Patent: May 1, 2001Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 6176629Abstract: An ink-supplied wire dot matrix printer head for actuating wires with ink attached to tip ends thereof into contact with a sheet of print paper to transfer ink to the sheet, thereby forming ink dots thereon. The ink-supplied wire dot matrix printer head includes a wire guide member having a wire guide hole for guiding the tip end of the wire, and an ink tank containing an ink absorbing body therein and having an ink supply port in which a portion of the wire guide member is inserted. The wire guide member has a capillary ink path communicating with a side of the wire and supplied with ink from the ink absorbing body.Type: GrantFiled: January 24, 1997Date of Patent: January 23, 2001Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 6123469Abstract: An ink-supplied wire dot matrix printer head for actuating wires with ink attached to tip ends thereof into contact with a sheet of print paper to transfer ink to the sheet, thereby forming ink dots thereon. The ink-supplied wire dot matrix printer head includes a wire guide member having a wire guide hole for guiding the tip end of the wire, and an ink tank containing an ink absorbing body therein and having an ink supply port in which a portion of the wire guide member is inserted. The wire guide member has a capillary ink path communicating with a side of the wire and supplied with ink from the ink absorbing body.Type: GrantFiled: November 22, 1994Date of Patent: September 26, 2000Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5622439Abstract: An ink-supplied wire dot matrix printer head for actuating wires with ink attached to tip ends thereof into contact with a sheet of print paper to transfer ink to the sheet, thereby forming ink dots thereon. The ink-supplied wire dot matrix printer head includes a wire guide member having a wire guide hole for guiding the tip end of the wire, and an ink tank containing an ink absorbing body therein and having an ink supply port in which a portion of the wire guide member is inserted. The wire guide member has a capillary ink path communicating with a side of the wire and supplied with ink from the ink absorbing body.Type: GrantFiled: June 5, 1995Date of Patent: April 22, 1997Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5615957Abstract: An ink-supplied wire dot matrix printer head for actuating wires with ink attached to tip ends thereof into contact with a sheet of print paper to transfer ink to the sheet, thereby forming ink dots thereon. The ink-supplied wire dot matrix printer head includes a wire guide member having a wire guide hole for guiding the tip end of the wire, and an ink tank containing an ink absorbing body therein and having an ink supply port in which a portion of the wire guide member is inserted. The wire guide member has a capillary ink path communicating with a side of the wire and supplied with ink from the ink absorbing body.Type: GrantFiled: June 5, 1995Date of Patent: April 1, 1997Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5607242Abstract: An ink-supplied wire dot matrix printer head for actuating wires with ink attached to tip ends thereof into contact with a sheet of print paper to transfer ink to the sheet, thereby forming ink dots thereon. The ink-supplied wire dot matrix printer head includes a wire guide member having a wire guide hole for guiding the tip end of the wire, and an ink tank containing an ink absorbing body therein and having an ink supply port in which a portion of the wire guide member is inserted. The wire guide member has a capillary ink path communicating with a side of the wire and supplied with ink from the ink absorbing body.Type: GrantFiled: June 5, 1995Date of Patent: March 4, 1997Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5603577Abstract: An ink-supplied wire dot matrix printer head for actuating wires with ink attached to tip ends thereof into contact with a sheet of print paper to transfer ink to the sheet, thereby forming ink dots thereon. The ink-supplied wire dot matrix printer head includes a wire guide member having a wire guide hole for guiding the tip end of the wire, and an ink tank containing an ink absorbing body therein and having an ink supply port in which a portion of the wire guide member is inserted. The wire guide member has a capillary ink path communicating with a side of the wire and supplied with ink from the ink absorbing body.Type: GrantFiled: June 5, 1995Date of Patent: February 18, 1997Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5560720Abstract: An ink-supplied wire dot matrix printer head for actuating wires with ink attached to tip ends thereof into contact with a sheet of print paper to transfer ink to the sheet, thereby forming ink dots thereon. The ink-supplied wire dot matrix printer head includes a wire guide member having a wire guide hole for guiding the tip end of the wire, and an ink tank containing an ink absorbing body therein and having an ink supply port in which a portion of the wire guide member is inserted. The wire guide member has a capillary ink path communicating with a side of the wire and supplied with ink from the ink absorbing body.Type: GrantFiled: March 14, 1995Date of Patent: October 1, 1996Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5453770Abstract: An on-demand type ink jet print head, comprising: a plurality of ink tanks disposed at a lower position of a carriage to be independent of each other, pressure varying means provided on one of the tanks; an air release port communicating with the other one of the tanks; a head assembly provided on top of the tanks to communicate with the tanks through flow paths at both sides of the head assembly. The object of the invention is to achieve stable printing independent of the amount of ink in an ink tank and discharge bubbles in a nozzle head together with the ink.Type: GrantFiled: June 11, 1992Date of Patent: September 26, 1995Assignee: Seiko Epson CorporationInventors: Takahiro Katakura, Toshio Kumagai, Shinji Yasukawa, Hideaki Sonehara, Masanao Matsuzawa, Fujio Akahane, Norihiko Kurashima, Toshiaki Ohshima, Katsuhiko Iida
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Patent number: 5421658Abstract: An ink-supplied wire dot matrix printer head for actuating wires with ink attached to tip ends thereof into contact with a sheet of print paper to transfer ink to the sheet, thereby forming ink dots thereon. The ink-supplied wire dot matrix printer head includes a wire guide member having a wire guide hole for guiding the tip end of the wire, and an ink tank containing an ink absorbing body therein and having an ink supply port in which a portion of the wire guide member is inserted. The wire guide member has a capillary ink path communicating with a side of the wire and supplied with ink from the ink absorbing body.Type: GrantFiled: November 10, 1993Date of Patent: June 6, 1995Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5328279Abstract: An ink-supplied wire dot matrix printer head for actuating wires with ink attached to tip ends thereof into contact with a sheet of print paper to transfer ink to the sheet, thereby forming ink dots thereon. The ink-supplied wire dot matrix printer head includes a wire guide member having a wire guide hole for guiding the tip end of the wire, and an ink tank containing an ink absorbing body therein and having an ink supply port in which a portion of the wire guide member is inserted. The wire guide member has a capillary ink path communicating with a side of the wire and supplied with ink from the ink absorbing body.Type: GrantFiled: October 16, 1992Date of Patent: July 12, 1994Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5221148Abstract: An ink-supply system for a dot matrix printer including an ink-supply tank formed with an ink-supply delivery port and an ink absorbing member formed of a porous material and dimensioned to substantially fill the ink-supply tank. The ink-supply tank includes an inner wall surface having projections to provide a space between the ink absorbing member and the wall surface.Type: GrantFiled: November 30, 1990Date of Patent: June 22, 1993Inventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5174665Abstract: An ink-supply system for a dot matrix printer including an ink-supply tank having an ink-supply delivery port and an ink absorbing member having at least two separate porous members disposed as stacked layers, one of the porous members which is closer to the ink-supply delivery port being made of a porous material having a smaller average pore size than the porous material of the other porous member more remote from the ink-supply delivery port.Type: GrantFiled: November 30, 1990Date of Patent: December 29, 1992Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5158377Abstract: An ink-supply system for a dot matrix printer including an ink-supply tank formed with an ink supply delivery port having an opening for passage of ink from the ink-supply tank. An ink absorbing member formed of a porous material is mounted within the ink-supply tank and compressed relative to at least another region of the ink absorbing member at least in the region thereof facing the opening of the ink supply delivery port.Type: GrantFiled: November 30, 1990Date of Patent: October 27, 1992Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5156473Abstract: An ink-supply system for a dot matrix printer including an ink-supply tank formed as a single disposable unit and adapted for mounting in and removal from the ink-supply system as a unit. The ink-supply tank is formed with a plurality of ink-supply sections, each of the ink-supply sections having an ink-supply delivery port. An ink absorbing member formed of a porous material substantially fills each of the ink-supply sections, substantially the desired capacity of ink for each of said ink-supply sections being carried by each of the ink absorbing members, at least two of the ink-supply sections carrying ink of different colors.Type: GrantFiled: November 30, 1990Date of Patent: October 20, 1992Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5156472Abstract: An ink-supply system for a dot matrix printer including an ink-supply tank having an ink-supply delivery port, an ink impregnated member formed of a porous material within the ink-supply tank, and ink impregnated in the ink absorbing member under a pressure sufficiently low to substantially eliminate air bubbles within the ink impregnated member.Type: GrantFiled: November 30, 1990Date of Patent: October 20, 1992Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5156470Abstract: An ink-supply system for a dot matrix printer including a unitary ink-supply tank formed with a plurality of ink-supply sections and a further separate ink-supply tank. An ink absorbing member formed of a porous material is positioned in each of the ink-supply sections and in the further separate ink-supply tank, each of the ink absorbing members substantially filling its respective ink-supply section or further separate ink-supply tank, substantially the desired capacity of ink for each of the ink-supply sections of the further separate ink-supply tank being carried by the respective ink absorbing member thereof. At least two of the ink-supply sections carry ink of different colors other than black, the further ink-supply tank carrying black ink.Type: GrantFiled: November 30, 1990Date of Patent: October 20, 1992Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5156471Abstract: An ink-supplied wire dot matrix printer head for actuating wires with ink attached to tip ends thereof into contact with a sheet of print paper to transfer ink to the sheet, thereby forming ink dots thereon. The ink-supplied wire dot matrix printer head includes a wire guide member having a wire guide hole for guiding the tip end of the wire, and an ink tank containing an ink absorbing body therein and having an ink supply port in which a portion of the wire guide member is inserted. The wire guide member has a capillary ink path communicating with a side of the wire and supplied with ink from the ink absorbing body.Type: GrantFiled: November 9, 1990Date of Patent: October 20, 1992Assignee: Seiko Epson CorporationInventors: Takashi Suzuki, Masanao Matsuzawa, Yoshinori Miyazawa
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Patent number: 5072240Abstract: An on-demand type ink jet print head including a drive assembly formed from a vibrating plate formed of a piezoelectric layer with an electrode layer on one surface and an electrically conductive, physically resilient layer on the opposite surface of the piezoelectric layer. The vibrating plate is secured to a base and has two opposing edges defining a free space therebetween. The vibrating plate is slit into a plurality of strips and these strips are cross-slit in the widthwise direction to form a row of reed pieces secured to each opposing edge of the base in a cantilever configuration and extending into the free space from each edge toward the reed pieces extending from the opposite edge with a space therebetween. The reed pieces are electrically and mechanically independent of each other and have negligible electrical and mechanical interference with each other.Type: GrantFiled: December 6, 1989Date of Patent: December 10, 1991Assignee: Seiko Epson CorporationInventors: Yoshinori Miyazawa, Hidenori Omae, Masanao Matsuzawa, Hisashi Miyazawa, Takahiro Katakura, Osamu Nakamura, Norihiko Kurashima