Patents by Inventor Hideaki Nishida

Hideaki Nishida 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: 20080158295
    Abstract: An ink-jet head includes a nozzle array including plural nozzles. The nozzle array has a first nozzle group arranged in the center thereof and second nozzle groups arranged further on outer sides than the first nozzle group. Inter-nozzle pitches of the second nozzle groups are larger than inter-nozzle pitches of the first nozzle group. A direction in which nozzles of the second nozzle group eject an ink and a direction in which nozzles of the first nozzle group eject the ink are different.
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Isao Suzuki, Yoshiro Eto, Masashi Shimosato, Takahisa Ikeda, Megumi Shimizu, Minoru Koyata, Hideaki Nishida, Takashi Kikuchi
  • Publication number: 20080158320
    Abstract: An ink jet recording apparatus includes an ink jet head having a pressure chamber opposed to a nozzle, an upstream port that communicates with the pressure chamber, and a downstream port, a first tank that communicates with the ink jet head via the downstream port and is capable of storing an ink, a second tank that communicates with the first tank and is capable of storing the ink, a third tank that communicates with the ink jet head via the upstream port and communicates with the second tank and is capable of storing the ink, an opening and closing mechanism that is capable of opening and closing a circulation path that connects the ink jet head, the first tank, the second tank, and the third tank, and an air pressure adjusting mechanism that is capable of adjusting an internal air pressure in at least one of the first tank, the second tank, and the third tank.
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Noboru Nitta, Masashi Shimosato, Hideaki Nishida, Isao Suzuki
  • Publication number: 20080158321
    Abstract: An ink jet recording apparatus according to an embodiment of the invention includes an ink jet head having a pressure chamber facing a nozzle, and an upstream port and a downstream port connected to the pressure chamber, a main tank connected to the ink jet head via the upstream port and capable of storing ink therein, and a sub-tank connected to the ink jet head via the downstream port and capable of storing ink, wherein at least when printing by ejecting ink from the nozzle, the relation between ph, r, R and Q is held to satisfy ph?{QR×(1/(1+r))}=Pn (Pn being a constant representing a proper pressure in the nozzle), where ph represents a potential pressure in the main tank as viewed from a surface of an orifice plate where the nozzle of the ink jet head is formed, R represents a total flow path resistance from the main tank to the sub-tank via the ink jet head, a ratio of a flow path resistance from the main tank to the nozzle and a flow path resistance from the nozzle to the sub-tank is expressed by 1:r, a
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Noboru Nitta, Masashi Shimosato, Hideaki Nishida, Isao Suzuki
  • Publication number: 20080158307
    Abstract: An ink supplying mechanism includes a circulating system that connects an ink jet head having a nozzle, a pressure chamber opposed to the nozzle, and an upstream port and a downstream port that communicate with the pressure chamber, an upstream side tank that communicates with the ink jet head via the upstream port and is capable of storing an ink, a downstream side tank that communicates with the ink jet head via the downstream port and is capable of storing the ink, and a circulating pump that feeds the ink from the downstream side tank back to the upstream side tank. The ink supplying mechanism has a relief valve that is capable of opening and closing at least a liquid surface of the downstream side tank with respect to the atmospheric pressure, closes the relief valve to drive the circulating pump, sets the liquid surface of the downstream side tank to a negative pressure, and feeds the ink from the downstream side tank back to the upstream side tank via a feedback channel to circulate the ink.
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Noboru Nitta, Masashi Shimosato, Hideaki Nishida, Isao Suzuki
  • Publication number: 20070252860
    Abstract: “Energy per unit volume” P2(Pa) generated in ink 4 in a second ink tank 14 is maintained to the condition “P2={(1+r)×Pn}?(r×P1)” based on “energy per unit volume” P1(Pa) generated in ink 4 in the first ink tank 12, a proportion of “1:r” between channel resistance R1 (Pa·sec/m3) of ink from the first ink tank 12 to the neighborhood of a nozzle 1 and channel resistance R2 (Pa·sec/m3) of ink from the neighborhood of the nozzle 1 to the second ink tank 14, and appropriate pressure Pn (Pa) of the ink 4 in the neighborhood of the nozzle 1.
    Type: Application
    Filed: March 30, 2007
    Publication date: November 1, 2007
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Noboru Nitta, Masashi Shimosato, Hideaki Nishida, Isao Suzuki
  • Patent number: 7083253
    Abstract: In such a manner that ink in each of a plurality of pressure chambers for holding the ink therein is brought to a positive pressure state of being ejected from respective nozzles respectively communicating with the respective chambers to the outside of each of the pressure chambers, a cleaning member abutted against a nozzle plate formed with a plurality of nozzles is moved along the nozzles in a state in which pressure is applied to all of the pressure chambers, to thereby extrude foreign particles outside the pressure chambers by the ink ejected from the respective nozzles to the outside of the pressure chambers, thereby making it possible to recover the ink, whereby the occurrence of a delivery failure due to the foreign particles around the nozzles being absorbed into the pressure chambers, can be prevented, and the foreign particles contained in the ink can be purged without consuming much ink needlessly.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: August 1, 2006
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Kazuhisa Kimura, Hideyuki Akaba, Hidekazu Ishii, Hideaki Nishida
  • Patent number: 7029090
    Abstract: An ink jet head cleaning apparatus is provided which includes a wiping unit which performs a wiping operation for a nozzle surface of an ink jet head and a suction unit which performs a sucking operation for the nozzle surface. An operation OFF condition of the wiping unit and an operation OFF condition of the suction unit is detected, and the wiping unit and the suction unit are actuated selectively in accordance with the operation OFF condition thus detected. If an elapsed time after the wiping operation is longer than a first predetermined time, the wiping unit is actuated, and if an elapsed time after the sucking operation is longer than a second predetermined time, the suction unit is actuated. The first predetermined time is longer than the second predetermined time.
    Type: Grant
    Filed: May 3, 2005
    Date of Patent: April 18, 2006
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Hideaki Nishida, Hidekazu Ishii, Kazuhisa Kimura, Hideyuki Akaba
  • Publication number: 20050190229
    Abstract: An ink jet head cleaning apparatus is provided which includes a wiping unit which performs a wiping operation for a nozzle surface of an ink jet head and a suction unit which performs a sucking operation for the nozzle surface. An operation OFF condition of the wiping unit and an operation OFF condition of the suction unit is detected, and the wiping unit and the suction unit are actuated selectively in accordance with the operation OFF condition thus detected. If an elapsed time after the wiping operation is longer than a first predetermined time, the wiping unit is actuated, and if an elapsed time after the sucking operation is longer than a second predetermined time, the suction unit is actuated. The first predetermined time is longer than the second predetermined time.
    Type: Application
    Filed: May 3, 2005
    Publication date: September 1, 2005
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Hideaki Nishida, Hidekazu Ishii, Kazuhisa Kimura, Hideyuki Akaba
  • Patent number: 6880911
    Abstract: In the ink jet head unit of the present invention, an ink jet head for emitting ink in a formof droplets from nozzles formed in a nozzle face and a driving circuit for driving the ink jet head are mounted on the same surface side of the base board. A groove section is formed in the surface, extending from the nozzle face of the ink jet head to the driving circuit. In the ink jet head, a temperature measuring section is positioned in the groove section. Furthermore, there is provided a sealing member in the groove section, to prevent the flow of ink emitted from the nozzles, into the driving circuit. The sealing member is partly formed of an elastic body. Therefore, since the elastic body can restrain a change in the volume of the sealing member likely to be caused by a temperature change, it is possible to prevent the temperature change from impairing the ink jet head, consequently realizing ink projection stability.
    Type: Grant
    Filed: July 15, 2003
    Date of Patent: April 19, 2005
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Isao Suzuki, Hideaki Nishida
  • Patent number: 6866362
    Abstract: A mechanism is provided for allowing a wipe member formed of an elastic material to abut against a nozzle plate in which a plurality nozzles communicating with a pressure chamber for holding ink therein are arranged, moving the wipe member along the nozzle plate to remove ink and foreign particles remaining in the nozzle plate, and switching the position of abutment of the wipe member against the nozzle plate, whereby satisfactory sweeping capability of the wipe member can be maintained without providing a wipe member cleaning mechanism and performing the work of replacing of the wipe member with another.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: March 15, 2005
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Kazuhisa Kimura, Hideyuki Akaba, Hidekazu Ishii, Hideaki Nishida
  • Publication number: 20050012773
    Abstract: In the ink jet head unit of the present invention, an ink jet head for emitting ink in a form of droplets from nozzles formed in a nozzle face and a driving circuit for driving the ink jet head are mounted on the same surface side of the base board. A groove section is formed in the surface, extending from the nozzle face of the ink jet head to the driving circuit. In the ink jet head, a temperature measuring section is positioned in the groove section. Furthermore, there is provided a sealing member in the groove section, to prevent the flow of ink emitted from the nozzles, into the driving circuit. The sealing member is partly formed of an elastic body. Therefore, since the elastic body can restrain a change in the volume of the sealing member likely to be caused by a temperature change, it is possible to prevent the temperature change from impairing the ink jet head, consequently realizing ink projection stability.
    Type: Application
    Filed: July 15, 2003
    Publication date: January 20, 2005
    Applicant: Toshiba Tec Kabushiki Kaisha
    Inventors: Isao Suzuki, Hideaki Nishida
  • Publication number: 20040257396
    Abstract: In an ink jet head cleaning apparatus according to the present invention there are provided a wiping unit which performs a wiping operation for a nozzle surface of an ink jet head and a suction unit which performs a sucking operation for the nozzle surface, and an operation OFF condition of the ink jet head, the wiping unit or the suction unit is detected, then the wiping unit and the suction unit are actuated selectively in accordance with the operation OFF condition thus detected. With this construction, the operation frequency of the suction unit necessary for keeping the nozzle surface of the ink jet head in good condition can be kept low and hence it is possible to reduce the consumption of energy. Besides, it is possible to diminish the operation frequency of the wiping unit which causes wear or damage of the nozzle surface and it is possible to attain a long life of the ink jet head.
    Type: Application
    Filed: June 19, 2003
    Publication date: December 23, 2004
    Applicant: Toshiba Tec Kabushiki Kaisha
    Inventors: Hideaki Nishida, Hidekazu Ishii, Kazuhisa Kimura, Hideyuki Akaba
  • Publication number: 20040189741
    Abstract: A mechanism is provided for allowing a wipe member formed of an elastic material to abut against a nozzle plate in which a plurality nozzles communicating with a pressure chamber for holding ink therein are arranged, moving the wipe member along the nozzle plate to remove ink and foreign particles remaining in the nozzle plate, and switching the position of abutment of the wipe member against the nozzle plate, whereby satisfactory sweeping capability of the wipe member can be maintained without providing a wipe member cleaning mechanism and performing the work of replacing of the wipe member with another.
    Type: Application
    Filed: March 25, 2003
    Publication date: September 30, 2004
    Applicant: Toshiba Tec Kabushika Kaisha
    Inventors: Kazuhisa Kimura, Hideyuki Akaba, Hidekazu Ishii, Hideaki Nishida
  • Publication number: 20040189735
    Abstract: An ink jet head cleaning apparatus of the present invention comprises a flexible contact member and a driving unit. The flexible contact member is mounted in a position where its top end comes into contact with a nozzle face of an ink jet head having the nozzle face provided with outlets for discharging ink in a form of droplets, and is movable along the nozzle face. On the other hand, the driving unit functions to correlatively move the ink jet head and the contact member. The top end of the contact member is divided into a plurality of sections in a direction orthogonal to the direction of its movement. Thus, a foreign substance holding on the nozzle face can be removed completely from the nozzle face by means of the wipe blade. Furthermore, the growth of the foreign substance can be restrained. It is therefore possible to prevent deterioration of ink discharge stability and straight discharge of ink.
    Type: Application
    Filed: March 24, 2003
    Publication date: September 30, 2004
    Applicant: Toshiba Tec Kabushika Kaisha
    Inventors: Hidekazu Ishii, Hideaki Nishida, Kazuhisa Kimura, Hideyuki Akaba
  • Publication number: 20040189742
    Abstract: In such a manner that ink in each of a plurality of pressure chambers for holding the ink therein is brought to a positive pressure state of being ejected from respective nozzles respectively communicating with the respective chambers to the outside of each of the pressure chambers, a cleaning member abutted against a nozzle plate formed with a plurality of nozzles is moved along the nozzles in a state in which pressure is applied to all of the pressure chambers, to thereby extrude foreign particles outside the pressure chambers by the ink ejected from the respective nozzles to the outside of the pressure chambers, thereby making it possible to recover the ink, whereby the occurrence of a delivery failure due to the foreign particles around the nozzles being absorbed into the pressure chambers, can be prevented, and the foreign particles contained in the ink can be purged without consuming much ink needlessly.
    Type: Application
    Filed: March 25, 2003
    Publication date: September 30, 2004
    Applicant: Toshiba Tec Kabushika Kaisha
    Inventors: Kazuhisa Kimura, Hideyuki Akaba, Hidekazu Ishii, Hideaki Nishida
  • Patent number: 5955198
    Abstract: This invention aims to offer a transparent touch panel that functions with a soft touching pressure by a pen or a finger, at the same time assures a long operating life.The transparent touch panel comprises a base plate having a transparent electro conductive layer, a top plate having a transparent electro concuctive layer, and a plurality of dot spacers located in between the base plate and the top plate.By a touch pressure given from the outer surface of the top plate, the transparent electro conductive layer placed in the top plate touches to the transparent electro conductive layer placed in the base plate, and the place touched is detected. What this touch panel specifically features is that it comprises dot spacers made of a composite resin containing a flexible modified epoxy resin. Hardness of the dot spacer is preferably not more than 95 according to JIS-K6301-A.
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: September 21, 1999
    Assignee: Matsushita Electric Co., Ltd.
    Inventors: Koji Hashimoto, Toshiharu Fukui, Akira Nakanishi, Fuminori Umemura, Hideaki Nishida, Mitsuru Harada, Kazunori Omoya, Takashi Obayashi
  • Patent number: 4974680
    Abstract: A sheet-feeding mechanism comprises feed rollers attached to a first driving shaft and spaced from each other by a predetermined distance, two of the feed rollers being end feed rollers located at both ends of the first driving shaft. A pair of end ball rollers are attached to a second driving shaft and located in correspondence to the end feed rollers. A double-structure bail roller is attached to the second driving shaft in correspondance to the feed rollers, except for the end feed rollers. The double-structure bail roller includes an inner core and an outer layer having a small friction coefficient. The iner core is elastically deformable in a direction in which the end feed rollers are pressed against the corresponding bail rollers.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: December 4, 1990
    Assignee: Tokyo Electric Co., Ltd.
    Inventors: Hideaki Nishida, Chihiro Kosaka, Takeshi Hiyoshi, Tadashi Sugiyama