Patents by Inventor Hisao Iizuka
Hisao Iizuka 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: 5240983Abstract: A process for producing a polyolefin thermoplastic elastomer composition having superior rubbery elasticity, mechanical properties, etc. and also having improved processing fluidity, workability, etc. is provided, which process comprises blending(A) 40 to 80% by weight of an ethylene-propylene copolymer rubber and/or an ethylene-propylene-diene terpolymer, as a soft segment component,(B) 60 to 20% by weight of a crystalline ethylene-propylene block copolymer having an ethylene content of at least 5% by weight and a melt flow index of 0.5 to 30 g/10 minutes or a crystalline ethylene-propylene random copolymer having an ethylene content of at least 1.5% by weight and a melt flow index of 0.5 to 30 g/10 minutes, each as a hard segment, and based upon 100 parts by weight of the total of (A) and (B),(C) 0.3 to 5 parts by weight of an organosilane,(D) 0.Type: GrantFiled: July 16, 1990Date of Patent: August 31, 1993Assignee: Chisso CorporationInventors: Nobuchika Tabata, Fumikazu Saito, Hisao Iizuka, Yutaka Nozokido
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Patent number: 5138310Abstract: A driver IC of a light-emitting diode array head for an electronic photograph printer includes a current mirror circuit having a reference element and at least an output element so as to produce a reference current by use of a digital signal as an input thereto, a reference current source capable of outputting a plurality of reference current values, a selection circuit for specifying and selecting one of a plurality of reference current values from the reference current source, to be applied as an input current to the current mirror and an output control circuit for controlling the on and off states of an output current to be supplied to the output element of the current mirror circuit in accordance with a light emission control signal externally supplied.Type: GrantFiled: October 30, 1990Date of Patent: August 11, 1992Assignees: Hitachi, Ltd., Hitachi Cable, Ltd.Inventors: Hideo Hirane, Kiyohiko Tanno, Hisao Iizuka
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Patent number: 5061411Abstract: A method for making a dental root canal filling point wherein provision is made of a rotary member having its outer processing surface in the form of a curved plane in parallel with its axial direction and adapted to be rotated at a predetermined speed, and a moving member in which at least its processing surface is located in parallel with the processing surface of the rotary member and adapted to move at a speed substantially identical with a peripheral speed of the rotary member in an opposite rotational direction as the rotational direction of the rotary member in a gap portion in which a minimum distance is defined between the processing surfaces of the rotary member and the moving member.Type: GrantFiled: April 6, 1990Date of Patent: October 29, 1991Assignees: G-C Dental Industrial Corp., Nimikagakukogyo Co., Ltd.Inventors: Noboru Ubukata, Hisao Iizuka
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Patent number: 5028228Abstract: An apparatus for making a dental root canal filling point is provided, wherein provision is made of a rotary member having its outer processing surface in the form of a curved plane in parallel with its axial direction and adapted to be rotated at a predetermined speed and a moving member in which at least its processing surface is located in parallel with the processing surface of the rotary member and adapted to move at a speed substantially identical with a peripheral speed of the rotary member in the same direction as the rotational direction of the rotary member in a gap portion in which a minimum distance is defined between the processing surfaces of the rotary member and moving member.Type: GrantFiled: March 29, 1989Date of Patent: July 2, 1991Assignees: G-C Dental Industrial Corp., Nimikagakukogyo Co., Ltd.Inventors: Noboru Ubukata, Hisao Iizuka
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Patent number: 4967192Abstract: A driver IC of a light-emitting diode array head for an electronic photograph printer includes a current mirror circuit having a reference element and at least an output element so as to produce a reference current by use of a digital signal as an input thereto, a reference current source capable of outputting a plurality of reference current values, a selection circuit for specifying and selecting one of a plurality of reference current values from the reference current source to be applied as an input current to the current mirror circuit, and an output control circuit for controlling the on and off states of an output current to be supplied to the output element of the current mirror circuit in accordance with a light emission control signal externally supplied.Type: GrantFiled: April 20, 1988Date of Patent: October 30, 1990Assignees: Hitachi, Ltd., Hitachi Cable, Ltd.Inventors: Hideo Hirane, Kiyohiko Tanno, Hisao Iizuka
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Patent number: 4905021Abstract: An optical printer head with a light emitting diode array comprises means for setting a distance between a light emitting surface of a light emitting diode array chip and a rod lens array. The means is provided with two reference position levels at which the light emitting diode array chip and the rod lens array are held. Therefore, there is no necessity for adjusting the distance between the light emitting diode array chip and the rod lens array so that a productivity thereof is much improved.Type: GrantFiled: February 24, 1989Date of Patent: February 27, 1990Assignee: Hitachi Cable, Ltd.Inventors: Hisao Iizuka, Shigetoshi Hiratsuka, Kiyohiko Tanno, Teruji Satou, Norihiro Ashizuka
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Patent number: 4829321Abstract: An optical printer head with a light emitting diode array comprises means for setting a distance between a light emitting surface of a light emitting diode array chip and a rod lens array. The means is provided with two reference position levels at which the light emitting diode array chip and the rod lens array are held. Therefore, there is no necessity for adjusting the distance between the light emitting diode array chip and the rod lens array so that a productivity thereof is much improved.Type: GrantFiled: April 20, 1988Date of Patent: May 9, 1989Assignees: Hitachi Cable, Ltd., Hitachi, Ltd.Inventors: Hisao Iizuka, Shigetoshi Hiratsuka, Kiyohiko Tanno, Teruji Satou, Norihiro Ashizuka
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Patent number: 4761451Abstract: A polypropylene based composition for an acoustic vibration sheet having superior acoustic adhesion and high-impact properties to those of conventional products, and an acoustic vibration sheet prepared from the composition are provided; the composition is obtained by blending 100 parts by weight of a polypropylene having a crystallinity of 0.94 or more and a Q value of 10 or more with 1 to 15 parts by weight of a thermoplastic styrene block copolymer rubber, and if necessary, further blending 10 to 40 parts by weight of a filler with the above-mentioned two components.Type: GrantFiled: February 12, 1987Date of Patent: August 2, 1988Assignee: Chisso CorporationInventors: Tsutomu Moteki, Kunihiro Yamaguchi, Hisao Iizuka
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Patent number: 4584470Abstract: In a single-polarization fiber optics magnetic sensor comprising a light source, a Faraday rotation element, a photodetector, and optical waveguide means for optically coupling them; according to a first embodiment, the optical waveguide means comprises upstream and downstream polarization-maintaining optical fibers coupled to the entrance and exit of the Faraday rotation element without a polarizer or an analyzer interposed therebetween; according to a second embodiment, in addition thereto, the axis of polarization of the downstream polarization-maintaining optical fiber is at an angle of about 45 degrees with respect to the orientation of the linearly polarized light exiting from the Faraday rotation element at a magnetic field intensity H equal to 0; and according to a third embodiment, in addition thereto, a polarization beam splitter is located in alignment with the orientation of polarization of the exit light from the downstream polarization-maintaining optical fiber, and two polarized light beams proType: GrantFiled: December 7, 1983Date of Patent: April 22, 1986Assignee: Hitachi Cable LimitedInventors: Hisao Iizuka, Hiroshi Kajioka