Patents by Inventor Hiroshige Owaki

Hiroshige Owaki 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).

  • Publication number: 20190193397
    Abstract: A liquid ejecting head includes a plurality of driving elements that causes an ejection of a liquid from a nozzle by causing a fluctuation in a pressure, a sealing body that seals a first space for accommodating the plurality of driving elements, a case member that forms a second space for surrounding the sealing body, an atmosphere vent that is formed in the case member and through which the second space communicates with the air, a communication hole that is formed in the sealing body and through which the first space communicates with the second space, and a moisture absorbent disposed in the second space.
    Type: Application
    Filed: December 27, 2018
    Publication date: June 27, 2019
    Inventors: Yoshinori NAKAJIMA, Takahiro KANEGAE, Hiroshige OWAKI, Makoto OTSUKI, Hironori MATSUOKA
  • Publication number: 20190077165
    Abstract: A control method of a liquid ejecting apparatus is provided. The liquid ejecting apparatus includes a liquid ejecting head for ejecting a liquid in an inner-space thereof through a nozzle, an inflow-channel for flowing the liquid into the inner space, an outflow-channel for flowing the liquid out of the inner space, and a valve for the inflow-channel. The control method includes first control of opening the inflow-channel by opening the valve in accordance with a negative pressure on a downstream side of the valve to generate a liquid flow from the inflow-channel to the outflow-channel, second control of opening the inflow-channel by opening the valve by an external force to generate the liquid flow from the inflow-channel to the outflow-channel, and performing the second control, in accordance with a flow amount of the liquid flow, to open the valve under the first control.
    Type: Application
    Filed: September 12, 2018
    Publication date: March 14, 2019
    Inventors: Yoshinori NAKAJIMA, Hiroshige OWAKI
  • Publication number: 20190061364
    Abstract: A liquid ejecting apparatus includes a liquid path comprising a filter and a liquid storing chamber for supplying liquid to a liquid ejecting head. The liquid storing chamber has an inlet, a bubble retention space disposed above the inlet, a bottom disposed below the bubble retention space, and a first outlet and a second outlet. (i) The first outlet is located on one side of an imaginary center line passing through the center of a projected area, and the second outlet is located on the other side of the imaginary center line. Alternatively, (ii) the first outlet and the second outlet are located outside a projected area defined by projecting the bubble retention space onto the bottom.
    Type: Application
    Filed: August 29, 2018
    Publication date: February 28, 2019
    Inventors: Yoshinori NAKAJIMA, Takahiro KANEGAE, Hiroshige OWAKI, Shigeki SUZUKI, Hironori MATSUOKA
  • Patent number: 10011133
    Abstract: A liquid discharge device includes a liquid discharge head that includes a nozzle from which liquid is discharged and a liquid channel communicating with the nozzle, and that discharges liquid from the nozzle. The nozzle has an inner wall surface having an uneven pattern including a recess where the inner diameter of the nozzle is increased and a projection where the inner diameter of the nozzle is smaller than that in the recess. In a case where ink is continuously discharged from an identical nozzle, at a time when a meniscus in the nozzle after previous discharge is located closer to an initial position before discharge than a center position between the initial position and a position at which the meniscus is most greatly drawn toward the liquid channel, subsequent discharge is performed.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: July 3, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Atsushi Muto, Ryosuke Tsuchihashi, Hiroshige Owaki, Nobuaki Azami
  • Publication number: 20180134035
    Abstract: A liquid ejecting head includes a pair of connectors that can be connected to each other, a flexible circuit on which one of the connectors is mounted, a circuit board on which another one of the connectors is mounted, a driver element that generates a driving force for ejecting liquid from a nozzle in response to an electric signal that is supplied from the flexible circuit to the circuit board via the pair of connectors, and a locking mechanism that locks connection between the connector of the circuit board and the connector of the flexible circuit.
    Type: Application
    Filed: November 9, 2017
    Publication date: May 17, 2018
    Inventors: Takahiro KANEGAE, Katsuhiro OKUBO, Hiroshige OWAKI
  • Patent number: 9956773
    Abstract: A wall-shaped enclosure that forms a space which can accommodate a head chip is formed in a projecting manner at a lower end of a lower case member. Since a cylindrical thick part is formed at the lower end of the lower case member, the lower case member is unlikely to be bent, particularly around the wall-shaped enclosure and a part where the wall-shaped enclosure is disposed. The head chip that is disposed in the space of the lower case member which is unlikely to be bent is unlikely to be subjected to an external force, and the cover member absorbs torsion generated between the head chip and the lower case member so that the head chip is even more unlikely to be subjected to the external force.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: May 1, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Shunsuke Watanabe, Katsumi Enomoto, Ryota Kinoshita, Hiroyuki Ishii, Hiroshige Owaki, Takahiro Kanegae, Katsuhiro Okubo
  • Patent number: 9873256
    Abstract: A liquid ejecting head unit includes: a fixing plate provided with a plurality of openings; a plurality of heads, each of which is provided for each of the openings; and a channel holder that is provided with a plurality of channels and that accommodates the plurality of heads in cooperation with the fixing plate. Each of heads has a nozzle plate provided with a nozzle row having a plurality of nozzles. The head is fixed to a first surface of the fixing plate. An ejection surface is defined by a second surface of the fixing plate and the nozzle plate. The fixing plate has a plurality of sets, each of which has the plurality of openings. Only a part of the openings constituting each of the sets are disposed to be overlapped in a second direction, and the openings are disposed not to be overlapped in a first direction.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: January 23, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Hiroshige Owaki, Katsuhiro Okubo, Takahiro Kanegae
  • Publication number: 20170369723
    Abstract: A water-based ink includes a pigment, and water, in which a viscosity at 20° C. is in a range of 2 mPa·s to 7 mPa·s, and a yield value at 20° C. is less than 0.2 mPa, and the yield value at 20° C. when evaporating 25% of the water is less than 0.8 mPa.
    Type: Application
    Filed: May 30, 2017
    Publication date: December 28, 2017
    Inventors: Yusuke MIZUTAKI, Tomohito NAKANO, Wataru ITO, Atsushi MUTO, Hiroshige OWAKI
  • Publication number: 20170246893
    Abstract: A liquid discharge device includes a liquid discharge head that includes a nozzle from which liquid is discharged and a liquid channel communicating with the nozzle, and that discharges liquid from the nozzle. The nozzle has an inner wall surface having an uneven pattern including a recess where the inner diameter of the nozzle is increased and a projection where the inner diameter of the nozzle is smaller than that in the recess. In a case where ink is continuously discharged from an identical nozzle, at a time when a meniscus in the nozzle after previous discharge is located closer to an initial position before discharge than a center position between the initial position and a position at which the meniscus is most greatly drawn toward the liquid channel, subsequent discharge is performed.
    Type: Application
    Filed: February 16, 2017
    Publication date: August 31, 2017
    Inventors: Atsushi MUTO, Ryosuke TSUCHIHASHI, Hiroshige OWAKI, Nobuaki AZAMI
  • Publication number: 20170225456
    Abstract: A liquid ejecting head includes a pressure chamber that communicates with a nozzle which ejects liquid, a liquid chamber that communicates with the pressure chamber, a flexible compliance member that defines a portion of the liquid chamber, and a pressure adjusting mechanism that adjusts a supply pressure of liquid supplied to the liquid chamber. The pressure adjusting mechanism can adjust displacement of the compliance member.
    Type: Application
    Filed: February 8, 2017
    Publication date: August 10, 2017
    Inventors: Shunsuke WATANABE, Fumiya TAKINO, Shingo TOMIMATSU, Hiroshige OWAKI, Takahiro KANEGAE
  • Patent number: 9682557
    Abstract: A liquid ejecting head includes a first nozzle row in which nozzles which eject a liquid are juxtaposed along a first direction, first drive elements which cause the liquid to be ejected from each nozzle of the first nozzle row, a plurality of first individual wirings which are connected to the first drive elements, a first common wiring which is connected in common to the first drive elements, a second nozzle row in which nozzles are juxtaposed along the first direction, second drive elements which cause the liquid to be ejected from each nozzle of the second nozzle row, a plurality of second individual wirings which are connected to the second drive elements, and a second common wiring which is connected in common to the second drive elements and is not connected to the first common wiring. The plurality of first individual wirings, the first common wiring, the second individual wirings, and the second common wiring are connected to a common flexible cable.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: June 20, 2017
    Assignee: Seiko Epson Corporation
    Inventor: Hiroshige Owaki
  • Patent number: 9649842
    Abstract: A liquid ejecting apparatus includes a plurality of head units, in each of which a plurality of recording heads are disposed so as to be aligned in a main scanning direction in a holding member as a frame body, and a plurality of nozzle openings for discharging ink being disposed in a sub scanning direction in each recording head. The head units are aligned such that center lines thereof in the main scanning direction differ from each other in the main scanning direction. M (M is a natural number) liquid ejecting heads are attachable to each holding member in the main scanning direction. N (M>N (N is a natural number)) liquid ejecting heads, which discharge liquid, among the M liquid ejecting heads are arranged so as to be close to a center side of an entire width of the head units in the main scanning direction.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: May 16, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Hiroshige Owaki, Mikio Kitagishi, Tomohiro Yuda, Katsuhiro Okubo
  • Patent number: 9592663
    Abstract: A liquid ejecting head unit includes a liquid ejecting head that ejects liquid through a nozzle formed in a nozzle surface, and a holding member to which the liquid ejecting head is attached. Further, in the liquid ejecting head unit, the holding member includes a holder that supports the liquid ejecting head in a predetermine direction which is different from a direction of the nozzle surface of the liquid ejecting head, and a base portion that sticks out from the holder to a side which is parallel to the predetermined direction.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: March 14, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Hiroyuki Ishii, Hiroshige Owaki, Katsuhiro Okubo, Hiroyuki Hagiwara
  • Publication number: 20170008291
    Abstract: A liquid ejecting head unit includes: a fixing plate provided with a plurality of openings; a plurality of heads, each of which is provided for each of the openings; and a channel holder that is provided with a plurality of channels and that accommodates the plurality of heads in cooperation with the fixing plate. Each of heads has a nozzle plate provided with a nozzle row having a plurality of nozzles. The head is fixed to a first surface of the fixing plate. An ejection surface is defined by a second surface of the fixing plate and the nozzle plate. The fixing plate has a plurality of sets, each of which has the plurality of openings. Only a part of the openings constituting each of the sets are disposed to be overlapped in a second direction, and the openings are disposed not to be overlapped in a first direction.
    Type: Application
    Filed: July 8, 2016
    Publication date: January 12, 2017
    Inventors: Hiroshige OWAKI, Katsuhiro OKUBO, Takahiro KANEGAE
  • Publication number: 20160311224
    Abstract: A wall-shaped enclosure that forms a space which can accommodate a head chip is formed in a projecting manner at a lower end of a lower case member. Since a cylindrical thick part is formed at the lower end of the lower case member, the lower case member is unlikely to be bent, particularly around the wall-shaped enclosure and a part where the wall-shaped enclosure is disposed. The head chip that is disposed in the space of the lower case member which is unlikely to be bent is unlikely to be subjected to an external force, and the cover member absorbs torsion generated between the head chip and the lower case member so that the head chip is even more unlikely to be subjected to the external force.
    Type: Application
    Filed: July 5, 2016
    Publication date: October 27, 2016
    Inventors: Shunsuke WATANABE, Katsumi ENOMOTO, Ryota KINOSHITA, Hiroyuki ISHII, Hiroshige OWAKI, Takahiro KANEGAE, Katsuhiro OKUBO
  • Patent number: 9475292
    Abstract: A liquid ejecting head includes generating chambers communicating with nozzles, a manifold communicating with the pressure generating chambers, a flexible member that has a compliance region, which is able to perform deflection in response to pressure fluctuation in the manifold, a compliance space disposed on a side opposite to the manifold through the flexible member, a cap member facing the flexible member through the compliance space; a frame-like member disposed between the flexible member and the cap member, and an island-like member to be disposed in the compliance region and separated from the frame-like member. One surface of the frame-like member faces the flexible member and the other surface faces the cap member. In a direction in which the flexible member and the cap member face each other, the island-like member is thinner in thickness than the frame-like member.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: October 25, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Takahiro Kanegae, Katsuhiro Okubo, Hiroshige Owaki, Takashi Kato
  • Patent number: 9434167
    Abstract: A seal member to be arranged between a first member having a first flow channel and a second member having a second flow channel, including: an elastic portion formed of an elastically deformable first material and including at least a communicating portion provided with a communicating hole which communicates a first flow channel and a second flow channel; and a main body portion formed of a second material having higher liquid-resistant properties than the first material and configured to surround the elastic portion in a state in which at least a flow channel seal surface of the communicating portion is exposed.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: September 6, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Hiroyuki Hagiwara, Hiroshige Owaki
  • Patent number: 9421769
    Abstract: A liquid ejecting head includes a liquid ejecting head main body that has a nozzle group that is formed by arranging a plurality of nozzles, which eject a liquid, in parallel, and that ejects a liquid from each nozzle, and a fixation member to which the liquid ejecting head main body is fixed. The fixation member has a fixation part to which the liquid ejecting head main body is fixed and a reference surface that is formed on a side opposite fixation part, and which includes a reference part serving as reference for a positioning the liquid ejecting head main body with respect to an installation target, and a position adjusting part adjusting the relative position between the reference surface and the nozzle group is provided between the liquid ejecting head main body and the fixation part.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: August 23, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Hiroshige Owaki, Hiroyuki Ishii
  • Publication number: 20160229187
    Abstract: A liquid ejecting head includes generating chambers communicating with nozzles, a manifold communicating with the pressure generating chambers, a flexible member that has a compliance region, which is able to perform deflection in response to pressure fluctuation in the manifold, a compliance space disposed on a side opposite to the manifold through the flexible member, a cap member facing the flexible member through the compliance space; a frame-like member disposed between the flexible member and the cap member, and an island-like member to be disposed in the compliance region and separated from the frame-like member. One surface of the frame-like member faces the flexible member and the other surface faces the cap member. In a direction in which the flexible member and the cap member face each other, the island-like member is thinner in thickness than the frame-like member.
    Type: Application
    Filed: January 19, 2016
    Publication date: August 11, 2016
    Inventors: Takahiro KANEGAE, Katsuhiro OKUBO, Hiroshige OWAKI, Takashi KATO
  • Patent number: 9409392
    Abstract: A wall-shaped enclosure that forms a space which can accommodate a head chip is formed in a projecting manner at a lower end of a lower case member. Since a cylindrical thick part is formed at the lower end of the lower case member, the lower case member is unlikely to be bent, particularly around the wall-shaped enclosure and a part where the wall-shaped enclosure is disposed. The head chip that is disposed in the space of the lower case member which is unlikely to be bent is unlikely to be subjected to an external force, and the cover member absorbs torsion generated between the head chip and the lower case member so that the head chip is even more unlikely to be subjected to the external force.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: August 9, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Shunsuke Watanabe, Katsumi Enomoto, Ryota Kinoshita, Hiroyuki Ishii, Hiroshige Owaki, Takahiro Kanegae, Katsuhiro Okubo