Patents by Inventor Tetsuro Ikeda

Tetsuro Ikeda 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: 20130324671
    Abstract: The object of the present invention to provide a solar cell sealing film, which has superior durability that maintains adhesive performance for a long duration under the circumstances of a high temperature and high humidity, exerts high crosslink rate at production of the solar cells, and suppresses occurrence of blister, an a solar cell using the sealing film. A solar cell sealing film, comprising: ethylene-polar monomer copolymer, an organic peroxide, and a silane-coupling agent, wherein the silane-coupling agent is represented by formula (I): in which R1 represents alkyl group having 1 to 3 carbon atoms, three R1s are the same as or different from each other, and “n” is an integer of 1 to 8; and the silane-coupling agent is contained in the range of 0.02 to 1.0 parts by weight based on 100 parts by weight of the ethylene-polar monomer copolymer.
    Type: Application
    Filed: February 7, 2012
    Publication date: December 5, 2013
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Hisataka Kataoka, Tetsuro Ikeda, Yoshihiko Inoue
  • Patent number: 8232501
    Abstract: A plasma arc power supply with a simple structure and its control method enable shifting from a pilot arc to a main arc. A plasma arc power supply used in a plasma arc apparatus that processes a workpiece by forming a pilot arc between a main electrode and a nozzle electrode and subsequently forming a main arc between the main electrode and the workpiece includes N direct current power supply units (N?2) having negative terminals connected to the main electrode and positive terminals to the workpiece, and a switch between the fourth power supply unit and the workpiece. The fourth power supply unit is connected to cause the nozzle electrode to have an opposite polarity to the main electrode. When the switch is open, the fourth power supply unit supplies a small current between the main electrode and the nozzle electrode while forming a pilot arc between them.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: July 31, 2012
    Assignee: Sansha Manufacturing Co., Ltd.
    Inventors: Masahiro Ohashi, Takayuki Nishisako, Tetsuro Ikeda
  • Publication number: 20120107564
    Abstract: The object of the present invention to provide an ethylene-unsaturated ester copolymer film used for forming a laminate, which is provided with emboss having effect on prevention on blocking during storage of the film, and which has good tackiness that is required for alignment in a laminating step. A film 40 for forming a laminate, which is formed from a composition comprising an ethylene-unsaturated ester copolymer and has emboss only on one surface 41 of the film, wherein a surface 42 opposite to the surface having emboss is provided with a fine asperity 43, the surface 42 provided with the fine asperity 43 having a surface roughness profile with a mean spacing between peaks (Sm) of 600 to 1600 ?m and an arithmetical mean roughness (Ra) of 1.2 to 2.2 ?m.
    Type: Application
    Filed: May 12, 2010
    Publication date: May 3, 2012
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yoshihiko Inoue, Tetsuro Ikeda
  • Publication number: 20120087163
    Abstract: A relay contact is connected between positive power supply input terminals of first and second inverters, and a relay contact is connected between negative power supply input terminals of the inverters. A positive DC power supply terminal is connected to the positive power supply input terminal of the first inverter, and a negative DC power supply terminal is connected to the negative power supply input terminal of the second inverter. A drive unit opens or closes the relay contacts when a voltage appearing between the positive and negative DC power supply terminals is larger than a predetermined value or is not larger than the predetermined value, respectively. A diode has its anode and cathode connected to the negative power supply input terminal of the first inverter the positive power supply input terminal of the second inverter, respectively.
    Type: Application
    Filed: December 21, 2010
    Publication date: April 12, 2012
    Applicant: SANSHA ELECTRIC MANUFACTURING COMPANY, LIMITED
    Inventors: Takeshi Morimoto, Tetsuro Ikeda
  • Publication number: 20110218280
    Abstract: The object of the present invention to provide a solar cell sealing film comprising chiefly ethylene-vinyl acetate copolymer, organic peroxides for giving crosslinked structure, which suppresses occurrence of blister without reduction of crosslink rate, even if the film contains silane-coupling agents for improving adhesive strength. The solar cell sealing film comprising ethylene-vinyl acetate copolymer, an organic peroxide, a silane-coupling agent, and a phosphite compound represented by formula (I): P(OR1)3(I) wherein, R1 is a branched-chain aliphatic alkyl group having 8 to 14 carbon atoms, and three R1s are the same as or different from each other.
    Type: Application
    Filed: November 11, 2009
    Publication date: September 8, 2011
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Tetsuro Ikeda, Hisataka Kataoka, Yoshihiko Inoue
  • Patent number: 7786682
    Abstract: Lighting of a discharge lamp is controlled in a manner to reduce deterioration of the discharge lamp subjected to high temperature and extend the lifetime of the discharge lamp. A method for controlling lighting of the discharge lamp includes a first constant current control process (period T1, which corresponds to steps S3 and S4) in which constant current control is executed by supplying a first current to the discharge lamp, a second constant current control process (period T3, which corresponds to steps S7 and S8) in which constant current control is executed by supplying a second current greater than the first current to the discharge lamp after the first constant current control process, and a constant power control process (period T4) in which constant power control is executed after the second constant current control process.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: August 31, 2010
    Assignee: Sansha Electric Manufacturing Co., Ltd.
    Inventors: Tetsuro Ikeda, Kenzo Danjo, Hiroki Morimoto
  • Patent number: 7599197
    Abstract: A rectifying circuit (18) converts inputted AC power to DC power. An inverter circuit (22) converts the DC power to high-frequency power in accordance with a switching control signal applied thereto from a control circuit (50). A voltage transformer (24) voltage-transforms the voltage of the high-frequency power. An output-side rectifying circuit (40) rectifies the voltage-transformed power. An output detecting circuit (34) detects the magnitude of the voltage of the rectified power, and a signal representative of the detected voltage is applied to the control circuit (50). The control circuit (50) generates such a switching control signal as to make the rectified power have a predetermined value. The value of the voltage from the rectifying circuit (18) is detected by an input detecting circuit (62), and a signal representative of the detected voltage is applied to the control circuit (50).
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: October 6, 2009
    Assignee: Sansha Electric Manufacturing Company, Limited
    Inventors: Hideo Ishii, Tetsuro Ikeda, Kenzo Danjo
  • Patent number: 7586766
    Abstract: Energy loss due to driving a plurality of power supply units simultaneously in a low-current region is prevented, and a more stable load current is obtained. The generation of a load current in a small-current region from a pilot arc current is handled solely by the power supply unit U1, the remaining (N?1) power supply units U2 through U4 are driven when the small-current region is exceeded, and a current that is the composite of all the currents is fed to the load, whereby a stable plasma arc power supply is obtained in which power consumption in the low-current region is reduced.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: September 8, 2009
    Assignee: Sansha Electric Manufacturing Co., Ltd.
    Inventors: Tetsuro Ikeda, Masahiro Ohashi, Takayuki Nishisako
  • Publication number: 20090190378
    Abstract: The power supply device of the present invention which outputs pulsed electrical current includes an inverter which converts an input voltage to high frequency AC, a rectifier which rectifies the output of the inverter and converts it to DC, and an output polarity changeover unit which, via a reactor, alternatingly turns ON and OFF the output at a positive electrode side of the rectifier and the output at a negative electrode side thereof. Moreover, this power supply device includes a current transformer including a closed magnetic circuit or coil, pierced by a first output current line in which the current at the positive electrode flows, and by a second output current line in which the current at the negative electrode flows. The directions of piercing of the output current lines through the current transformer are set so that the directions in the current transformer, in which current flows in the first and second output current lines, are the same.
    Type: Application
    Filed: January 29, 2008
    Publication date: July 30, 2009
    Inventors: Hideo Ishii, Tetsuro Ikeda, Kenzo Danjo
  • Publication number: 20090129122
    Abstract: This power supply device for an arc apparatus includes: a three phase full wave rectification circuit in which a plurality of semiconductor switching elements are connected in inverse parallel with a plurality of rectification elements, and which rectifies a three phase AC power supply; an AC reactor which is connected to the three phase AC power supply and the three phase full wave rectification circuit; a smoothing capacitor which smoothes the output voltage of the three phase full wave rectification circuit; an inverter circuit which converts the output of the smoothing capacitor to high frequency AC; and a rectification circuit which rectifies the output of the inverter circuit and supplies the result to a load. Moreover, this power supply device for an arc apparatus also includes a control is circuit which performs switching control of the semiconductor switching elements, so that the phases of the input voltage and of the input current of the three phase AC power supply agree with one another.
    Type: Application
    Filed: April 7, 2008
    Publication date: May 21, 2009
    Inventors: Masahiro Ohashi, Takayuki Nishisako, Tetsuro Ikeda
  • Patent number: 7528345
    Abstract: A welder power supply apparatus (10) includes an inverter (20), which is driven intermittently when an electrode (34) and a workpiece (36) are separated from each other and no arc is being generated between them, whereby power loss generated in the inverter (20) when the inverter (20) is driven in the non-load state of the power supply apparatus and power loss caused by exciting current flowing through an transformer (24) disposed in the output of the inverter (20) can be reduced. The inverter (20) is driven continuously when output current (Io) becomes higher than a threshold value (Ib) after the electrode (34) and the workpiece (36) are brought into contact with each other for starting arcing between them. In this manner, the arcing can be initiated without fail.
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: May 5, 2009
    Assignee: Sansha Electric Manufacturing Company, Limited
    Inventors: Takeshi Morimoto, Kenzo Danjo, Tetsuro Ikeda, Hideo Ishii
  • Publication number: 20090084768
    Abstract: A plasma arc power supply with a simple structure and its control method enable shifting from a pilot arc to a main arc. A plasma arc power supply used in a plasma arc apparatus that processes a workpiece by forming a pilot arc between a main electrode and a nozzle electrode and subsequently forming a main arc between the main electrode and the workpiece includes N direct current power supply units (N?2) having negative terminals connected to the main electrode and positive terminals to the workpiece, and a switch between the fourth power supply unit and the workpiece. The fourth power supply unit is connected to cause the nozzle electrode to have an opposite polarity to the main electrode. When the switch is open, the fourth power supply unit supplies a small current between the main electrode and the nozzle electrode while forming a pilot arc between them.
    Type: Application
    Filed: January 18, 2008
    Publication date: April 2, 2009
    Applicant: SANSHA ELECTRIC MANUFACTURING CO. LTD.,
    Inventors: Masahiro OHASHI, Takayuki NISHISAKO, Tetsuro IKEDA
  • Publication number: 20080315781
    Abstract: The present invention is directed to realize an optimum lamp control with an inexpensive configuration in a discharge lamp light-up control apparatus. A constant current control unit controls light-up of a discharge lamp by transmitting a control signal to an inverter and includes: a storage for storing lamp characteristics of the discharge lamp; and a CPU for obtaining information indicative of a type of the discharge lamp attached, reading the lamp characteristics from the storage based on the obtained type information, and transmitting a control signal to the inverter so that an output corresponding to the read lamp characteristics are obtained.
    Type: Application
    Filed: June 18, 2008
    Publication date: December 25, 2008
    Applicant: SANSHA ELECTRIC MANUFACTURING CO., LTD.
    Inventors: Tetsuro IKEDA, Kenzo DANJO, Hiroki MORIMOTO
  • Publication number: 20080315790
    Abstract: Lighting of a discharge lamp is controlled in a manner to reduce deterioration of the discharge lamp subjected to high temperature and extend the lifetime of the discharge lamp. A method for controlling lighting of the discharge lamp includes a first constant current control process (period T1, which corresponds to steps S3 and S4) in which constant current control is executed by supplying a first current to the discharge lamp, a second constant current control process (period T3, which corresponds to steps S7 and S8) in which constant current control is executed by supplying a second current greater than the first current to the discharge lamp after the first constant current control process, and a constant power control process (period T4) in which constant power control is executed after the second constant current control process.
    Type: Application
    Filed: June 13, 2008
    Publication date: December 25, 2008
    Applicant: SANSHA ELECTRIC MANUFACTURING CO., LTD.
    Inventors: Tetsuro IKEDA, Kenzo DANJO, Hiroki MORIMOTO
  • Patent number: 7457139
    Abstract: A power supply apparatus for use with arc-utilizing apparatuses includes a plurality of power supply blocks of the same capacity. Each power supply block includes an input-side rectifying circuit, an inverter, a transformer, and an output-side rectifying circuit. The inverter is controlled by a control circuit in such a manner that high-frequency current flowing the inverter or current flowing through the output-side rectifying circuit can correspond to a reference signal provided by a reference signal generator. The outputs of the output-side rectifying circuits of the power supply blocks are connected in parallel with each other. The values of the reference signals generated by the reference signal generators are made always equal by the action of equipotential lines.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: November 25, 2008
    Assignee: Sansha Electric Manufacturing Company, Limited
    Inventors: Hideo Isii, Tetsuro Ikeda, Kenzo Danjo, Yuji Ikejiri
  • Publication number: 20080252827
    Abstract: A laminated optical film according to an embodiment of the present invention includes a long polarizer having an absorption axis in a lengthwise direction and a long optical compensation film. An angle formed by a slow axis of the optical compensation film and the absorption axis of the polarizer is 5 to 85°.
    Type: Application
    Filed: April 10, 2008
    Publication date: October 16, 2008
    Applicant: NITTO DENKO CORPORATION
    Inventors: Mariko HIRAI, Megumi KATO, Tetsuro IKEDA
  • Publication number: 20080143261
    Abstract: Energy loss due to driving a plurality of power supply units simultaneously in a low-current region is prevented, and a more stable load current is obtained. The generation of a load current in a small-current region from a pilot arc current is handled solely by the power supply unit U1, the remaining (N?1) power supply units U2 through U4 are driven when the small-current region is exceeded, and a current that is the composite of all the currents is fed to the load, whereby a stable plasma arc power supply is obtained in which power consumption in the low-current region is reduced.
    Type: Application
    Filed: December 12, 2007
    Publication date: June 19, 2008
    Applicant: SANSHA ELECTRIC MANUFACTURING CO. LTD.,
    Inventors: Tetsuro IKEDA, Masahiro OHASHI, Takayuki NISHISAKO
  • Patent number: 7388171
    Abstract: Welding conditions are set for a power supply apparatus for use with a welding machine, using a control panel unit (96). A memory (105) stores therein welding conditions as set through the control unit (96), and holds the set welding conditions after turning off of a main power supply switch (1) of the power supply apparatus. Upon turning on of the main power switch (1) for starting welding, the welding conditions stored and held in the memory (105) are read out and set in the power supply apparatus.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: June 17, 2008
    Assignee: Sansha Electric Manufacturing Company, Limited
    Inventors: Takeshi Morimoto, Kenzo Danjo, Yuji Ikejiri, Tetsuro Ikeda, Hideo Ishii
  • Patent number: 7339807
    Abstract: One of a plurality of voltages is adapted to be applied to power supply terminals (2a, 2b, 2c). A rectifying circuit (6) rectifies the applied voltage and develops a rectified voltage between the output terminals (6a, 6b) thereof. Inverters (16a, 16b) are connected into one of a plurality of inverter connections between the rectifier output terminals (6a, 6b) in response to one of a plurality of inverter connection indicative signals. The inverter connections are set to correspond to respective ones of the plurality of voltages, so that a predetermined voltage can be applied to each inverter whichever one of the plurality of voltages is applied to the power supply terminals. An inverter connection indicative signal generating circuit (34) is manually operated to generate a desired one of the inverter connection indicative signals. A thyristor (8) is disposed between the rectifier output terminals (6a, 6b) and the inverters (16a, 16b).
    Type: Grant
    Filed: January 8, 2007
    Date of Patent: March 4, 2008
    Assignee: Sansha Electric Manufacturing Company, Limited
    Inventors: Masao Katooka, Tetsuro Ikeda, Kenzo Danjo, Takeshi Morimoto, Hideo Ishii
  • Publication number: 20080047941
    Abstract: A welder power supply apparatus (10) includes an inverter (20), which is driven intermittently when an electrode (34) and a workpiece (36) are separated from each other and no arc is being generated between them, whereby power loss generated in the inverter (20) when the inverter (20) is driven in the non-load state of the power supply apparatus and power loss caused by exciting current flowing through an transformer (24) disposed in the output of the inverter (20) can be reduced. The inverter (20) is driven continuously when output current (Io) becomes higher than a threshold value (Ib) after the electrode (34) and the workpiece (36) are brought into contact with each other for starting arcing between them.
    Type: Application
    Filed: July 24, 2007
    Publication date: February 28, 2008
    Applicant: SANSHA ELECTRIC MANUFACTURING COMPANY, LIMITED
    Inventors: Takeshi Morimoto, Kenzo Danjo, Tetsuro Ikeda, Hideo Ishii