Patents by Inventor Hiromasa Amma
Hiromasa Amma 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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Publication number: 20140307027Abstract: A liquid ejection head includes a recording element substrate having an ejection port, a support member having a recessed portion, and supporting the recording element substrate by a bottom portion of the recessed portion, wiring electrically connected to the recording element substrate and extending between the recording element substrate and a side surface of the recessed portion, a sealant with which the wiring is covered, and a passage formed in the support member, and allowing a first region where the sealant is placed, and a second region different from the sealed region to communicate with each other.Type: ApplicationFiled: March 28, 2014Publication date: October 16, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Kyosuke Toda, Hirotaka Miyazaki, Hiromasa Amma
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Patent number: 8777377Abstract: A liquid discharge head includes a recording element substrate including an electrode pad, a support member including a recess that supports the recording element substrate on a bottom surface thereof, an electric wiring member, and a sealant. The electric wiring member includes an opening through which the recording element substrate is exposed, an electric lead wire extending from the opening and connected to the electrode pad, and a protrusion formed in the opening and extending between a side surface of the recording element substrate and an inner side surface of the recess facing the side surface. A distal end of the protrusion is in contact with the bottom surface of the recess. The sealant is disposed in a region surrounded by a surface of the protrusion, the bottom surface of the recess, the inner side surface of the recess, and the side surface of the recording element substrate.Type: GrantFiled: June 29, 2012Date of Patent: July 15, 2014Assignee: Canon Kabushiki KaishaInventors: Rumi Nagata, Hiromasa Amma, Keisuke Iinuma
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Publication number: 20130293636Abstract: A liquid discharge head includes: a recording element substrate and a plurality of electric connection units; and an electric wiring member that includes a plurality of input terminals, a plurality wirings held between films and electrically connected to the plurality of input terminals, and a plurality of lead lines conducted to the plurality of wirings. In this case, the plurality of wirings include a power line for supplying power to the energy generation elements and a signal line for supplying a signal to the energy generation elements. Relationships of A>B and B<D are satisfied, in which A is a largest width of the signal line, B is a largest width of the lead line connected to the signal line, and D is a largest width of the lead line connected to the power line.Type: ApplicationFiled: July 3, 2013Publication date: November 7, 2013Inventors: Keisuke Iinuma, Hiromasa Amma, Kyosuke Toda
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Patent number: 8500250Abstract: A liquid discharge head includes: a recording element substrate and a plurality of electric connection units; and an electric wiring member that includes a plurality of input terminals, a plurality wirings held between films and electrically connected to the plurality of input terminals, and a plurality of lead lines conducted to the plurality of wirings. In this case, the plurality of wirings include a power line for supplying power to the energy generation elements and a signal line for supplying a signal to the energy generation elements. Relationships of A>B and B<D are satisfied, in which A is a largest width of the signal line, B is a largest width of the lead line connected to the signal line, and D is a largest width of the lead line connected to the power line.Type: GrantFiled: January 23, 2012Date of Patent: August 6, 2013Assignee: Canon Kabushiki KaishaInventors: Keisuke Iinuma, Hiromasa Amma, Kyosuke Toda
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Patent number: 8398207Abstract: An apparatus includes nozzles and an ink passage. Each nozzle includes a pressure chamber which houses an electrothermal transducer provided on a substrate to apply ejection energy to ink, an ink ejection orifice which faces the electrothermal transducer, and an ink passage along which the ink is supplied to the pressure chamber. The ink supply port is provided on the substrate and communicates with the ink passages. A distance between a center of gravity of the electrothermal transducer and the ink supply port differs between the nozzles which are next to each other. In at least one of the nozzles, a center of gravity of the ink ejection orifice is shifted from that of the electrothermal transducer in a direction toward the ink supply port by an amount which is increased as the distance increases.Type: GrantFiled: October 19, 2009Date of Patent: March 19, 2013Assignee: Canon Kabushiki KaishaInventors: Shingo Nagata, Hiromasa Amma
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Publication number: 20130027463Abstract: An ink cartridge including a housing formed with a resin and an ink stored in the housing, wherein the resin includes a white mica composition; the ink includes a salt and a self-dispersible pigment having a functional group that contains two phosphonic acid groups and is bonded to the particle surface thereof; the salt includes a specific cation and a specific anion; and an amount of calcium in the ink after the ink is preserved in the housing at 60° C. for 2 months is 10.0 ppm or less.Type: ApplicationFiled: June 19, 2012Publication date: January 31, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Masashi Ogasawara, Keigo Gouda, Fumiaki Fujioka, Souichi Nagai, Akiko Yasuda, Keiichiro Tsukuda, Hiromasa Amma, Kyosuke Toda
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Publication number: 20130010034Abstract: A liquid discharge head includes a recording element substrate including an electrode pad, a support member including a recess that supports the recording element substrate on a bottom surface thereof, an electric wiring member, and a sealant. The electric wiring member includes an opening through which the recording element substrate is exposed, an electric lead wire extending from the opening and connected to the electrode pad, and a protrusion formed in the opening and extending between a side surface of the recording element substrate and an inner side surface of the recess facing the side surface. A distal end of the protrusion is in contact with the bottom surface of the recess. The sealant is disposed in a region surrounded by a surface of the protrusion, the bottom surface of the recess, the inner side surface of the recess, and the side surface of the recording element substrate.Type: ApplicationFiled: June 29, 2012Publication date: January 10, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Rumi Nagata, Hiromasa Amma, Keisuke Iinuma
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Publication number: 20120188311Abstract: A liquid discharge head includes: a recording element substrate and a plurality of electric connection units; and an electric wiring member that includes a plurality of input terminals, a plurality wirings held between films and electrically connected to the plurality of input terminals, and a plurality of lead lines conducted to the plurality of wirings. In this case, the plurality of wirings include a power line for supplying power to the energy generation elements and a signal line for supplying a signal to the energy generation elements. Relationships of A>B and B<D are satisfied, in which A is a largest width of the signal line, B is a largest width of the lead line connected to the signal line, and D is a largest width of the lead line connected to the power line.Type: ApplicationFiled: January 23, 2012Publication date: July 26, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Keisuke Iinuma, Hiromasa Amma, Kyosuke Toda
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Patent number: 8162460Abstract: An inkjet printing cartridge capable of ejecting miniaturized ink droplets in a stable manner while avoiding the complexity of the structure and control as well as suppressing the cost rise. For this purpose, the inkjet printing cartridge is formed of a material having the permeability to liquid and gas, and the ink supply path for supplying ink to the ejection opening having a relatively small ejection amount is arranged adjacent to other ink supply paths via walls.Type: GrantFiled: April 9, 2008Date of Patent: April 24, 2012Assignee: Canon Kabushiki KaishaInventors: Hiromasa Amma, Keiichiro Tsukuda
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Patent number: 8147048Abstract: A cartridge is constituted by a plurality of absorbing materials for retaining liquid, an interface formed by press-contact between opposing surfaces of the absorbing materials, an introducing portion for supplying the liquid out of the absorbing materials, and a filter provided at an end portion of the introducing portion. The absorbing materials press against the filter so that an end portion of the interface reaches the filter.Type: GrantFiled: June 28, 2011Date of Patent: April 3, 2012Assignee: Canon Kabushiki KaishaInventor: Hiromasa Amma
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Patent number: 8109617Abstract: A structure for informing a state of the ink tank by a light emitting section such as LED, capable of displaying such information at a position easily visible by the user and favorably sending the emitted light both to the user and a light receiver section on the printer side without needing electric wiring which may disturb the user's visibility or manipulation. The light emitting section is separated from the display section and a light guiding section is provided between the both. A member for suitably limiting the emission of light is provided in the display section. Thereby, it is possible to dispose the display section at the best position without needing the electric wiring on the ink tank and obtain a preferable light volume suitable both for the improvement in user's visibility and the stability of the operation of the light receiving section.Type: GrantFiled: February 22, 2008Date of Patent: February 7, 2012Assignee: Canon Kabushiki KaishaInventors: Yasuo Kotaki, Keisuke Matsuo, Kenji Kitabatake, Hiromasa Amma, Naoki Tashiro
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Patent number: 8070276Abstract: A cartridge is constituted by a plurality of absorbing materials for retaining liquid, an interface formed by press-contact between opposing surfaces of the absorbing materials, an introducing portion for supplying the liquid out of the absorbing materials, and a filter provided at an end portion of the introducing portion. The absorbing materials press against the filter so that an end portion of the interface reaches the filter.Type: GrantFiled: October 2, 2008Date of Patent: December 6, 2011Assignee: Canon Kabushiki KaishaInventor: Hiromasa Amma
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Publication number: 20110254906Abstract: A cartridge is constituted by a plurality of absorbing materials for retaining liquid, an interface formed by press-contact between opposing surfaces of the absorbing materials, an introducing portion for supplying the liquid out of the absorbing materials, and a filter provided at an end portion of the introducing portion. The absorbing materials press against the filter so that an end portion of the interface reaches the filter.Type: ApplicationFiled: June 28, 2011Publication date: October 20, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Hiromasa Amma
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Patent number: 7926927Abstract: A structure for informing a state of the ink tank by a light emitting section such as LED, capable of displaying such information at a position easily visible by the user and favorably sending the emitted light both to the user and a light receiver section on the printer side without needing electric wiring which may disturb the user's visibility or manipulation. The light emitting section is separated from the display section and a light guiding section is provided between the both. A member for suitably limiting the emission of light is provided in the display section. Thereby, it is possible to dispose the display section at the best position without needing the electric wiring on the ink tank and obtain a preferable light volume suitable both for the improvement in user's visibility and the stability of the operation of the light receiving section.Type: GrantFiled: April 28, 2008Date of Patent: April 19, 2011Assignee: Canon Kabushiki KaishaInventors: Yasuo Kotaki, Keisuke Matsuo, Kenji Kitabatake, Hiromasa Amma, Naoki Tashiro
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Publication number: 20100097425Abstract: An apparatus includes nozzles and an ink passage. Each nozzle includes a pressure chamber which houses an electrothermal transducer provided on a substrate to apply ejection energy to ink, an ink ejection orifice which faces the electrothermal transducer, and an ink passage along which the ink is supplied to the pressure chamber. The ink supply port is provided on the substrate and communicates with the ink passages. A distance between a center of gravity of the electrothermal transducer and the ink supply port differs between the nozzles which are next to each other. In at least one of the nozzles, a center of gravity of the ink ejection orifice is shifted from that of the electrothermal transducer in a direction toward the ink supply port by an amount which is increased as the distance increases.Type: ApplicationFiled: October 19, 2009Publication date: April 22, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Shingo Nagata, Hiromasa Amma
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Patent number: 7588328Abstract: An ink jet cartridge including a case, in which the bottom portion where an ink jet recording head is disposed projects, and a lid for covering the top surface thereof. In an ink containing chamber defined by the these case and the lid, there is provided an absorber. The lid is configured so that ribs provided directly over the projecting bottom are higher than the other ribs, and so that the lid can be used for different types of cartridge. In a black cartridge, the pertinent ribs perform the function of effectively bringing the absorber into pressure contact with an ink introducing section. In a color cartridge, the pertinent ribs perform the function of restraining the height of the top surface of the absorber disposed on the projecting bottom portion to a position lower than that of the top surface of each of the other absorbers.Type: GrantFiled: March 27, 2007Date of Patent: September 15, 2009Assignee: Canon Kabushiki KaishaInventors: Hiromasa Amma, Wataru Takahashi, Masashi Ogawa, Yasuo Kotani
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Patent number: 7559636Abstract: An ink tank capable of a stable ink supply to a print head uses a simple valve construction. In one preferred example, an ink path is closed by a lip portion of a valve rubber engaging a flange, and an angle formed by an inner surface of an opening in the lip portion and an engagement surface of the flange is an acute angle.Type: GrantFiled: June 28, 2006Date of Patent: July 14, 2009Assignee: Canon Kabushiki KaishaInventors: Kenji Kitabatake, Yasuo Kotaki, Keisuke Matuso, Toshihiko Ujita, Hiromasa Amma
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Publication number: 20090091608Abstract: A cartridge is constituted by a plurality of absorbing materials for retaining liquid, an interface formed by press-contact between opposing surfaces of the absorbing materials, an introducing portion for supplying the liquid out of the absorbing materials, and a filter provided at an end portion of the introducing portion. The absorbing materials press against the filter so that an end portion of the interface reaches the filter.Type: ApplicationFiled: October 2, 2008Publication date: April 9, 2009Applicant: CANON KABUSHIKI KAISHAInventor: Hiromasa Amma
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Patent number: 7445322Abstract: A liquid storing container having a liquid storing chamber for storing liquid, the liquid container includes a plurality of light-transmissive prisms for forming interfaces with the liquid or gas in the liquid storing chamber; wherein each of the prisms includes at least one surface contactable to the liquid in the liquid storing chamber, wherein each of the prisms includes a surface integral with a surface constituting a part of the liquid storing chamber, and wherein the prisms are substantially diagonally disposed in the liquid storing chamber.Type: GrantFiled: December 7, 2005Date of Patent: November 4, 2008Assignee: Canon Kabushiki KaishaInventors: Kenji Kitabatake, Keisuke Matsuo, Masashi Ogawa, Hiromasa Amma
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Publication number: 20080252705Abstract: An inkjet printing cartridge capable of ejecting miniaturized ink droplets in a stable manner while avoiding the complexity of the structure and control as well as suppressing the cost rise. For this purpose, the inkjet printing cartridge is formed of a material having the permeability to liquid and gas, and the ink supply path for supplying ink to the ejection opening having a relatively small ejection amount is arranged adjacent to other ink supply paths via walls.Type: ApplicationFiled: April 9, 2008Publication date: October 16, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Hiromasa Amma, Keiichiro Tsukuda