Patents by Inventor Mizuyo Takebayashi
Mizuyo Takebayashi 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: 9216571Abstract: A liquid discharge apparatus is provided, comprising a channel structure; a piezoelectric actuator which has a plurality of individual electrodes, a common electrode, and a piezoelectric layer sandwiched between the individual electrodes and the common electrode; and a driving device which drives the piezoelectric actuator. The driving device outputs an individual driving signal which causes a change of an electric potential of the individual electrode, to the individual electrode corresponding to the nozzle for discharging the liquid. Further, the driving device outputs a common driving signal which causes a change of an electric potential of the common electrode in synchronization with the change of the electric potential of the individual electrode into which the individual driving signal is inputted, to the common electrode.Type: GrantFiled: August 8, 2014Date of Patent: December 22, 2015Assignee: Brother Kogyo Kabushiki KaishaInventors: Kyohei Naito, Mizuyo Takebayashi, Keiji Kura
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Patent number: 9142753Abstract: There is provided a piezoelectric actuator, including: first and second piezoelectric layers; a driving electrode arranged between the first and second piezoelectric layers; a second electrode maintained at a predetermined first electrical potential; and a third electrode maintained at a second electrical potential. A neutral plane of the piezoelectric actuator is positioned at a side opposite to the second piezoelectric layer relative to a center plane of the first piezoelectric layer in a direction of stacking of the first and second piezoelectric layers. A first portion of the first piezoelectric layer is sandwiched between the driving electrode and the second electrode, and a second portion of the second piezoelectric layer is sandwiched between the driving electrode and the third electrode. The first and second portions are polarized parallel to the stacking direction such that they are polarized in mutually opposite directions.Type: GrantFiled: July 30, 2014Date of Patent: September 22, 2015Assignee: Brother Kogyo Kabushiki KaishaInventors: Taisuke Mizuno, Mizuyo Takebayashi, Kyohei Naito, Shotaro Kanzaki, Masato Sueyasu, Keiji Kura
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Patent number: 9044983Abstract: A liquid jetting apparatus includes: a head unit including a liquid jetting head, a regulating member arranged to sandwich the head unit from a nozzle array direction, a restriction mechanism configured to restrict the head unit from displacement in an orthogonal direction perpendicular to the nozzle array direction, and a landing position correction mechanism configured to correct position of landing the liquid jetted from the plurality of nozzles onto the medium in the orthogonal direction. The restriction mechanism restricts a portion of the head unit inside of outmost nozzle arrays in the orthogonal direction.Type: GrantFiled: July 26, 2012Date of Patent: June 2, 2015Assignee: Brother Kogyo Kabushiki KaishaInventors: Mizuyo Takebayashi, Shohei Koide, Yusuke Suzuki, Hiromitsu Mizutani, Atsushi Ito
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Publication number: 20150091962Abstract: A liquid discharge apparatus is provided, comprising a channel structure; a piezoelectric actuator which has a plurality of individual electrodes, a common electrode, and a piezoelectric layer sandwiched between the individual electrodes and the common electrode; and a driving device which drives the piezoelectric actuator. The driving device outputs an individual driving signal which causes a change of an electric potential of the individual electrode, to the individual electrode corresponding to the nozzle for discharging the liquid. Further, the driving device outputs a common driving signal which causes a change of an electric potential of the common electrode in synchronization with the change of the electric potential of the individual electrode into which the individual driving signal is inputted, to the common electrode.Type: ApplicationFiled: August 8, 2014Publication date: April 2, 2015Inventors: Kyohei NAITO, Mizuyo Takebayashi, Keiji Kura
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Publication number: 20150035906Abstract: There is provided a piezoelectric actuator, including: first and second piezoelectric layers; a driving electrode arranged between the first and second piezoelectric layers; a second electrode maintained at a predetermined first electrical potential; and a third electrode maintained at a second electrical potential. A neutral plane of the piezoelectric actuator is positioned at a side opposite to the second piezoelectric layer relative to a center plane of the first piezoelectric layer in a direction of stacking of the first and second piezoelectric layers. A first portion of the first piezoelectric layer is sandwiched between the driving electrode and the second electrode, and a second portion of the second piezoelectric layer is sandwiched between the driving electrode and the third electrode. The first and second portions are polarized parallel to the stacking direction such that they are polarized in mutually opposite directions.Type: ApplicationFiled: July 30, 2014Publication date: February 5, 2015Inventors: Taisuke MIZUNO, Mizuyo Takebayashi, Kyohei Naito, Shotaro Kanzaki, Masato Sueyasu, Keiji Kura
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Patent number: 8702203Abstract: A liquid jetting apparatus includes: a plurality of liquid jet heads each of which has a nozzle surface in which a plurality of nozzles are formed to align in one direction, a retention member which retains the plurality of liquid jet heads in a state of being arranged along one plane, a transport mechanism which transports a medium in a transport direction along the one plane, and a displacement mechanism which displaces the retention member in a specified direction toward one side along a direction intersecting the nozzle surfaces by curving the retention member or rotating the same in a rotation direction when the retention member extends due to temperature change on the one plane in an intersectant direction intersecting the transport direction.Type: GrantFiled: July 26, 2012Date of Patent: April 22, 2014Assignee: Brother Kogyo Kabushiki KaishaInventors: Hiromitsu Mizutani, Shohei Koide, Yusuke Suzuki, Atsushi Ito, Mizuyo Takebayashi
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Publication number: 20130076818Abstract: A liquid jetting apparatus includes: a head unit including a liquid jetting head, a regulating member arranged to sandwich the head unit from a nozzle array direction, a restriction mechanism configured to restrict the head unit from displacement in an orthogonal direction perpendicular to the nozzle array direction, and a landing position correction mechanism configured to correct position of landing the liquid jetted from the plurality of nozzles onto the medium in the orthogonal direction. The restriction mechanism restricts a portion of the head unit inside of outmost nozzle arrays in the orthogonal direction.Type: ApplicationFiled: July 26, 2012Publication date: March 28, 2013Inventors: Mizuyo TAKEBAYASHI, Shohei KOIDE, Yusuke SUZUKI, Hiromitsu MIZUTANI, Atsushi ITO
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Publication number: 20130050319Abstract: A liquid jetting apparatus includes: a plurality of liquid jet heads each of which has a nozzle surface in which a plurality of nozzles are formed to align in one direction, a retention member which retains the plurality of liquid jet heads in a state of being arranged along one plane, a transport mechanism which transports a medium in a transport direction along the one plane, and a displacement mechanism which displaces the retention member in a specified direction toward one side along a direction intersecting the nozzle surfaces by curving the retention member or rotating the same in a rotation direction when the retention member extends due to temperature change on the one plane in an intersectant direction intersecting the transport direction.Type: ApplicationFiled: July 26, 2012Publication date: February 28, 2013Inventors: Hiromitsu MIZUTANI, Shohei Koide, Yusuke Suzuki, Atsushi Ito, Mizuyo Takebayashi