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: 20080211892Abstract: 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: ApplicationFiled: April 28, 2008Publication date: September 4, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Yasuo Kotaki, Keisuke Matsuo, Kenji Kitabatake, Hiromasa Amma, Naoki Tashiro
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Publication number: 20080151023Abstract: 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: ApplicationFiled: February 22, 2008Publication date: June 26, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Yasuo Kotaki, Keisuke Matsuo, Kenji Kitabatake, Hiromasa Amma, Naoki Tashiro
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Patent number: 7384116Abstract: 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: October 17, 2005Date of Patent: June 10, 2008Assignee: Canon Kabushiki KaishaInventors: Yasuo Kotaki, Keisuke Matsuo, Kenji Kitabatake, Hiromasa Amma, Naoki Tashiro
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Patent number: 7350910Abstract: A liquid container for accommodating liquid for use with an ink jet recording apparatus includes a light emitting portion; an electric contact for receiving a signal for actuating said light emitting portion from the ink jet recording apparatus; and a light guide portion for guiding the light from said light emitting portion to a display portion which displays information by the light which is emitted from said light emitting portion and which emerges from said display portion.Type: GrantFiled: October 17, 2005Date of Patent: April 1, 2008Assignee: Canon Kabushiki KaishaInventors: Hiromasa Amma, Yasuo Kotaki, Keisuke Matsuo, Kenji Kitabatake
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Publication number: 20070188569Abstract: 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: ApplicationFiled: March 27, 2007Publication date: August 16, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Hiromasa Amma, Wataru Takahashi, Masashi Ogawa, Yasuo Kotaki
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Patent number: 7249824Abstract: An ink print head reducing ink supply errors caused by air bubbles in order to stably supply ink at larger amounts. The ink print head includes an ink container for holding ink, a recording element for discharging the ink supplied from the ink container, a duct disposed between the ink container and the recording element to transfer the ink to the recording element, and an inductive channel which communicates with the duct. The inductive channel transfers the ink to the recording element from the ink container, and has a capillary force greater than that of the duct.Type: GrantFiled: December 14, 2004Date of Patent: July 31, 2007Assignee: Canon Kabushiki KaishaInventors: Masashi Ogawa, Wataru Takahashi, Hiromasa Amma, Yasuo Kotaki
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Patent number: 7234803Abstract: 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: December 16, 2004Date of Patent: June 26, 2007Inventors: Hiromasa Amma, Wataru Takahashi, Masashi Ogawa, Yasuo Kotaki
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Patent number: 7172273Abstract: An ink tank in which an air communication passage and a pressure regulator valve passage are formed by covering grooves, etc., with a film is fabricated in a simple manufacturing process. Specifically, an atmosphere communication hole and a major part of an air communication passage are formed in the same surface on which a film for forming a valve passage is attached. By virtue of this, the process of attaching a major part of the air communication passage film and the process of attaching the valve film can be performed in a single process step. This simplifies the process of attaching the films.Type: GrantFiled: May 14, 2004Date of Patent: February 6, 2007Assignee: Canon Kabushiki KaishaInventors: Toshihiko Ujita, Keisuke Matsuo, Kenji Kitabatake, Hiromasa Amma
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Publication number: 20060244793Abstract: 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: ApplicationFiled: June 28, 2006Publication date: November 2, 2006Applicant: Canon Kabushiki KaishaInventors: Kenji Kitabatake, Yasuo Kotaki, Keisuke Matsuo, Toshihiko Ujita, Hiromasa Amma
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Patent number: 7111931Abstract: An ink tank is provided which can apply an optimum negative pressure stably by a valve of a simple structure. To this end, the ink tank of this invention has a valve and a damper section installed in an ink flow path. The valve deforms when the negative pressure in the ink supply port is greater than a predetermined level, to temporarily open the ink flow path to introduce ink from the ink accommodation portion to the ink supply port. The damper section is installed between and communicates to the ink supply port and the valve in the ink flow path. The damper section is formed of a resilient member more easily deformed than the valve and applies a negative pressure to the interior of the ink supply port by an elastic recovery force of the resilient member.Type: GrantFiled: May 18, 2004Date of Patent: September 26, 2006Assignee: Canon Kabushiki KaishaInventors: Hiromasa Amma, Toshihiko Ujita, Yasuo Kotaki, Keisuke Matsuo, Kenji Kitabatake
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Patent number: 7108361Abstract: 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: April 28, 2004Date of Patent: September 19, 2006Assignee: Canon Kabushiki KaishaInventors: Kenji Kitabatake, Yasuo Kotaki, Keisuke Matsuo, Toshihiko Ujita, Hiromasa Amma
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Publication number: 20060139384Abstract: 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: ApplicationFiled: December 7, 2005Publication date: June 29, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Kenji Kitabatake, Keisuke Matsuo, Masashi Ogawa, Hiromasa Amma
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Patent number: 7055942Abstract: A liquid discharge head cartridge can assuredly supply a liquid discharge head with a liquid even when a bubble is generated within a liquid channel, and maintain excellent recording characteristics even in a configuration in which light recovery or no recovery is adopted. The cartridge includes a slit-shaped opening provided at an ink channel facing an ink-jet recording head, a filter provided at an ink introducing unit so as to contact an ink absorber, and ribs for supporting the filter that extend from an inner wall of the ink introducing unit to a substantially central portion of the filter.Type: GrantFiled: March 22, 2004Date of Patent: June 6, 2006Assignee: Canon Kabushiki KaishaInventors: Hiromasa Amma, Wataru Takahashi, Hiroki Hayashi, Masashi Ogawa, Yasuo Kotaki
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Publication number: 20060087538Abstract: A liquid container for accommodating liquid for use with an ink jet recording apparatus includes a light emitting portion; an electric contact for receiving a signal for actuating said light emitting portion from the ink jet recording apparatus; and a light guide portion for guiding the light from said light emitting portion to a display portion which displays information by the light which is emitted from said light emitting portion and which emerges from said display portion.Type: ApplicationFiled: October 17, 2005Publication date: April 27, 2006Applicant: Canon Kabushiki KaishaInventors: Hiromasa Amma, Yasuo Kotaki, Keisuke Matsuo, Kenji Kitabatake
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Publication number: 20060082625Abstract: 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: ApplicationFiled: October 17, 2005Publication date: April 20, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Yasuo Kotaki, Keisuke Matsuo, Kenji Kitabatake, Hiromasa Amma, Naoki Tashiro
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Publication number: 20050140761Abstract: 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: ApplicationFiled: December 16, 2004Publication date: June 30, 2005Applicant: Canon Kabushiki KaishaInventors: Hiromasa Amma, Wataru Takahashi, Masashi Ogawa, Yasuo Kotaki
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Publication number: 20050140750Abstract: An ink print head reducing ink supply errors caused by air bubbles in order to stably supply ink at larger amounts. The ink print head includes an ink container for holding ink, a recording element for discharging the ink supplied from the ink container, a duct disposed between the ink container and the recording element to transfer the ink to the recording element, and an inductive channel which communicates with the duct. The inductive channel transfers the ink to the recording element from the ink container, and has a capillary force greater than that of the duct.Type: ApplicationFiled: December 14, 2004Publication date: June 30, 2005Applicant: Canon Kabushiki KaishaInventors: Masashi Ogawa, Wataru Takahashi, Hiromasa Amma, Yasuo Kotaki
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Publication number: 20040246304Abstract: An ink jet cartridge and an ink tank are provided which can prevent an inappropriate ink tank from being mounted on the mounting portion of the tank holder. To this end, the tank holder has a tank mounting portion on which the ink tank is mounted. The tank mounting portion has a raised portion and the ink tank is formed with a notched portion. Moving the ink tank in a roughly pivotal motion by engaging the notched portion over the raised portion can connect the ink supply ports to the ink introduction portions. Now the mounting process is complete.Type: ApplicationFiled: June 3, 2004Publication date: December 9, 2004Applicant: CANON KABUSHIKI KAISHAInventors: Wataru Takahashi, Yasuo Kotaki, Masanori Takenouchi, Masashi Ogawa, Hiromasa Amma
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Publication number: 20040233259Abstract: An ink tank is provided which can apply an optimum negative pressure stably by a valve of a simple structure. To this end, the ink tank of this invention has a valve and a damper section installed in an ink flow path. The valve deforms when the negative pressure in the ink supply port is greater than a predetermined level, to temporarily open the ink flow path to introduce ink from the ink accommodation portion to the ink supply port. The damper section is installed between and communicates to the ink supply port and the valve in the ink flow path. The damper section is formed of a resilient member more easily deformed than the valve and applies a negative pressure to the interior of the ink supply port by an elastic recovery force of the resilient member.Type: ApplicationFiled: May 18, 2004Publication date: November 25, 2004Applicant: Canon Kabushiki KaishaInventors: Hiromasa Amma, Toshihiko Ujita, Yasuo Kotaki, Keisuke Matsuo, Kenji Kitabatake
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Publication number: 20040233258Abstract: This invention provides an ink tank capable of a stable ink supply to a print head by using 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: ApplicationFiled: April 28, 2004Publication date: November 25, 2004Applicant: Canon Kabushiki KaishaInventors: Kenji Kitabatake, Yasuo Kotaki, Keisuke Matsuo, Toshihiko Ujita, Hiromasa Amma