Patents by Inventor Tomoka Takanose
Tomoka Takanose 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: 20100177147Abstract: An inkjet recording apparatus comprises an inkjet recording head, an ink-testing unit having an ink-test chamber, a pressure-vibration generating unit that generates a pressure vibration in the ink-test chamber, a pressure-vibration detecting unit that detects the pressure vibration, an ink inlet that introduces ink into the ink-test chamber and an ink outlet through which ink is discharged from the ink-test chamber. Failures of ink ejection can be prevented by detecting cavitation cores by the ink-test chamber and removing ink containing the cavitation cores from ink supplied to the inkjet recording head.Type: ApplicationFiled: February 4, 2010Publication date: July 15, 2010Applicant: TOSHIBA TEC KABUSHIKI KAISHAInventors: Ryutaro Kusunoki, Tomoka Takanose, Toshio Miyazawa
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Patent number: 7681997Abstract: An inkjet recording apparatus comprises an inkjet recording head, an ink-testing unit having an ink-test chamber, a pressure-vibration generating unit that generates a pressure vibration in the ink-test chamber, a pressure-vibration detecting unit that detects the pressure vibration, an ink inlet that introduces ink into the ink-test chamber and an ink outlet through which ink is discharged from the ink-tester chamber. Failures of ink ejection can be prevented by detecting cavitation cores by the ink-test chamber and removing ink containing the cavitation cores from ink supplied to the inkjet recording head.Type: GrantFiled: June 6, 2007Date of Patent: March 23, 2010Assignee: Toshiba Tec Kabushiki KaishaInventors: Ryutaro Kusunoki, Tomoka Takanose, Toshio Miyazawa
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Patent number: 7669987Abstract: An ink jet recording apparatus includes an ink jet recording head having actuators that are caused to deflect so as to vary a volume of a pressure chamber according to a drive signal applied between an electrode associated with a pressure chamber from which ink is ejected and ones associated with two pressure chambers sandwiching the former, and a drive signal generator that generates a drive signal for driving the pressure chambers in the five time-divisional drive method. The drive signal generator simultaneously supplies drive signals for alleviating deflection of an actuator or actuators at the outmost position among six actuators disposed close around a pressure chamber from which ink is to be ejected to electrodes associated with the five pressure chambers close around one from which ink is not to be ejected at a timing when the ink ejection therefrom is enabled. Thus, variations in velocity and volume between ink droplets ejected that are caused due to cross-talk between chambers can be reduced.Type: GrantFiled: February 15, 2006Date of Patent: March 2, 2010Assignee: Toshiba TEC Kabushiki KaishaInventors: Ryutaro Kusunoki, Tomoka Takanose
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Patent number: 7625053Abstract: An ink jet recording apparatus comprises an ink jet recording head in which a volume of a pressure chamber is caused to vary by deflecting actuators according to drive signals applied between an electrode formed in a pressure chamber (9c) from which ink is to be ejected and electrodes formed in two pressure chambers adjacent the former, and a drive signal generator that generates drive signals for driving the recording head in the time-divisional drive method. The drive signals are applied to electrodes formed in pressure chambers 9a, 9b, 9d, and 9e, from which ink is not to be ejected so that pressure vibrations derivatively generated in the adjacent pressure chambers 9b and 9d are evenly dispersed to the pressure chambers 9a, 9b, 9d, and 9e. Thus, dropping of velocities of ink droplets that are subsequently ejected can be prevented and thereby printing quality can be improved.Type: GrantFiled: March 27, 2006Date of Patent: December 1, 2009Assignee: Toshiba Tec Kabushiki KaishaInventors: Tomoka Takanose, Ryutaro Kusunoki
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Patent number: 7384114Abstract: By initially setting a tone value-drive signal relation in which an assumed ink jet volume determined from the number of times the jettings of ink droplets of a respective kind relative to a tone value does not monotonically increase, the actual jet ink volume is set to monotonically increase relative to the jet volume.Type: GrantFiled: August 29, 2006Date of Patent: June 10, 2008Assignee: Toshiba Tec Kabushiki KaishaInventors: Tomoka Takanose, Ryutaro Kusunoki
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Patent number: 7367658Abstract: An ink jet recording apparatus comprises an ink jet recording head in which a volume of a pressure chamber is caused to vary by deflecting actuators according to drive signals applied between an electrode relative to a pressure chamber from which ink is ejected and actuators relative to two pressure chambers sandwiching the former, and a drive signal generator that generates drive signals for operating the recording head in the four time-divisional drive method.Type: GrantFiled: February 21, 2006Date of Patent: May 6, 2008Assignee: Toshiba TEC Kabushiki KaishaInventors: Ryutaro Kusunoki, Tomoka Takanose
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Publication number: 20070285455Abstract: An inkjet recording apparatus comprises an inkjet recording head, an ink-testing unit having an ink-test chamber, a pressure-vibration generating unit that generates a pressure vibration in the ink-test chamber, a pressure-vibration detecting unit that detects the pressure vibration, an ink inlet that introduces ink into the ink-test chamber and an ink outlet through which ink is discharged from the ink-tester chamber. Failures of ink ejection can be prevented by detecting cavitation cores by the ink-test chamber and removing ink containing the cavitation cores from ink supplied to the inkjet recording head.Type: ApplicationFiled: June 6, 2007Publication date: December 13, 2007Applicant: TOSHIBA TEC KABUSHIKI KAISAInventors: RYUTARO KUSUNOKI, Tomoka Takanose, Toshio Miyazawa
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Publication number: 20060284913Abstract: By initially setting a tone value-drive signal relation in which an assumed ink jet volume determined from the number of times the jettings of ink droplets of a respective kind relative to a tone value does not monotonically increase, the actual jet ink volume is set to monotonically increase relative to the jet volume.Type: ApplicationFiled: August 29, 2006Publication date: December 21, 2006Inventors: Tomoka Takanose, Ryutaro Kusunoki
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Publication number: 20060221103Abstract: An ink jet recording apparatus comprises an ink jet recording head in which a volume of a pressure chamber is caused to vary by deflecting actuators according to drive signals applied between an electrode formed in a pressure chamber (9c) from which ink is to be ejected and electrodes formed in two pressure chambers adjacent the former, and a drive signal generator that generates drive signals for driving the recording head in the time-divisional drive method. The drive signals are applied to electrodes formed in pressure chambers 9a, 9b, 9d, and 9e, from which ink is not to be ejected so that pressure vibrations derivatively generated in the adjacent pressure chambers 9b and 9d are evenly dispersed to the pressure chambers 9a, 9b, 9d, and 9e. Thus, dropping of velocities of ink droplets that are subsequently ejected can be prevented and thereby printing quality can be improved.Type: ApplicationFiled: March 27, 2006Publication date: October 5, 2006Applicant: Toshiba TEC Kabushiki KaishaInventors: Tomoka Takanose, Ryutaro Kusunoki
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Publication number: 20060197789Abstract: An ink jet recording apparatus comprises an ink jet recording head in which a volume of a pressure chamber is caused to vary by deflecting actuators according to drive signals applied between an electrode relative to a pressure chamber from which ink is ejected and actuators relative to two pressure chambers sandwiching the former, and a drive signal generator that generates drive signals for operating the recording head in the four time-divisional drive method.Type: ApplicationFiled: February 21, 2006Publication date: September 7, 2006Applicant: Toshiba TEC Kabushiki KaishaInventors: Ryutaro Kusunoki, Tomoka Takanose
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Publication number: 20060187273Abstract: An ink jet recording apparatus comprises an ink jet recording head having actuators that are caused to deflect so as to vary a volume of a pressure chamber according to a drive signal applied between an electrode associated with a pressure chamber from which ink is ejected and ones associated with two pressure chambers sandwiching the former, and a drive signal generator that generates a drive signal for driving the pressure chambers in the five time-divisional drive method. The drive signal generator simultaneously supplies drive signals for alleviating deflection of an actuator or actuators at the outmost position among six actuators disposed close around a pressure chamber from which ink is to be ejected to electrodes associated with the five pressure chambers close around one from which ink is not to be ejected at a timing when the ink ejection therefrom is enabled. Thus, variations in velocity and volume between ink droplets ejected that are caused due to cross-talk between chambers can be reduced.Type: ApplicationFiled: February 15, 2006Publication date: August 24, 2006Applicant: Toshiba TEC Kabushiki KaishaInventors: Ryutaro Kusunoki, Tomoka Takanose