Patents Assigned to Junkosha Company, Ltd.
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Patent number: 5571413Abstract: A layered composite material for filtration having a filter layer, a buffer layer, and a support, layer. The buffer layer is a material more compressible and extensible than the support layer and imparts strength and durability to the composite material.Type: GrantFiled: June 18, 1993Date of Patent: November 5, 1996Assignee: Junkosha Company Ltd.Inventors: Yoshiaki Mogami, Akira Moriya
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Patent number: 5308689Abstract: A waterproof and water-vapor-permeable composite laminated material that has good snag resistance and puncture resistance is described. The material is suitable for making outdoor apparel for wear in rugged environments, for example, where brambles, briers or dense underbrush are likely to be encountered.Type: GrantFiled: February 10, 1993Date of Patent: May 3, 1994Assignee: Junkosha Company, Ltd.Inventors: Tsunehisa Shinkai, Toshikazu Sato, Takashi Imai
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Patent number: 4645868Abstract: A high speed electrical transmission line is provided comprising a plurality of elongate conductor wires arranged in parallel relationship and encased in an outer insulating covering jacket having generally a rectangular cross-section and wherein each conductor is further encased within the outer jacket in an insulating covering of a porous resin material.Type: GrantFiled: April 15, 1985Date of Patent: February 24, 1987Assignee: Junkosha Company, Ltd.Inventor: Hirosuke Suzuki
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Patent number: 4640123Abstract: In a device for detecting oil leaks and the like on a surface of water such as a moat around an oil storage tank, a vibrator is placed which substantially eliminates extraneous matter attaching to or depositing on the sensor and thereby enhances the conditions for leak detection.Type: GrantFiled: August 22, 1985Date of Patent: February 3, 1987Assignee: Junkosha Company, Ltd.Inventors: Haruo Imaizumi, Satoru Kobayashi
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Patent number: 4640866Abstract: A printed circuit board is provided comprising at least one layer of metal firmly bonded in laminar contact with at least one layer of solid, sintered polytetrafluoroethylene (PTFE). In one embodiment, the solid PTFE layer contains fibers of porous, expanded, sintered PTFE mixed within it. In another embodiment, the solid PTFE layer is firmly bonded to the metal layer on one side and is firmly bonded on the other side to a layer of porous, expanded, sintered PTFE.Type: GrantFiled: April 1, 1985Date of Patent: February 3, 1987Assignee: Junkosha Company Ltd.Inventor: Hirosuke Suzuki
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Patent number: 4639693Abstract: An improved strip line cable for transmission of electromagnetic waves in the millimeter wave length range is provided. The cable has a plurality of face to face conductors in pairs, the conductors being separated from their paired counterparts by a porous plastic dielectric insulation material. The cable is jacketed. The improvement comprises the porous plastic dielectric material being, in addition, placed between each conductor and the jacketing material, thereby resulting in each conductor being effectively surrounded by porous plastic dielectric insulating material.Type: GrantFiled: April 15, 1985Date of Patent: January 27, 1987Assignee: Junkosha Company, Ltd.Inventors: Hirosuke Suzuki, Hiromi Yasumoto, Hiroshi Umemoto
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Patent number: 4610552Abstract: A temperature sensor is provided comprising a conductor having a low-melting-point, a fibrous insulating layer adjacent the low-melting-point conductor and separating it from a second conductor. An oscillator applying a pulse signal to the sensor and a receiver receiving the pulse signal through the sensor can detect changes in the signal wave form due to melting or distortion of the low-melting-point conductor. The specific temperature to be sensed can be preset by providing preheating of the sensor, as by Joule heating, by passing a current through the low-melting-point conductor.Type: GrantFiled: July 9, 1984Date of Patent: September 9, 1986Assignee: Junkosha Company Ltd.Inventors: Satoru Kobayashi, Yoshiaki Sato, Haruo Imaizumi
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Patent number: 4608299Abstract: A water-vapor-pervious, optionally waterproof, heat insulating material is provided wherein a discontinuous layer of thin, reflective aluminum particles or flakes are adhered to a surface of a heat insulating material which is water-vapor-pervious and which may be waterproof, the adhesive being a resinous material which is pervious to water vapor.Type: GrantFiled: January 31, 1986Date of Patent: August 26, 1986Assignee: Junkosha Company Ltd.Inventor: Haruo Nomi
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Patent number: 4570477Abstract: A liquid leak detecting sensor in cable form is provided wherein an element of the cable is a material which is easily deformable and which, on deformation, maintains the cable in the deformed configuration.Type: GrantFiled: January 27, 1984Date of Patent: February 18, 1986Assignee: Junkosha Company Ltd.Inventor: Hiroyuki Sugibuchi
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Patent number: 4563674Abstract: An improved floating sensor for the detection of oil leaks at a water surface is provided wherein a cloth layer is affixed to the outside of a leak detector which, by capillary action, results in a threshold level of oil film thickness below which no alarm sounds and above which an alarm will sound. The invention provides means for the pre-selection of the thickness of oil film which will be detected and eliminates the detection of very thin, inconsequential oil leaks.Type: GrantFiled: September 13, 1983Date of Patent: January 7, 1986Assignee: Junkosha Company Ltd.Inventor: Satoru Kobayashi
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Patent number: 4559254Abstract: A sheet of porous resinous material, particularly polytetrafluoroethylene, having a multiplicity of holes formed therethrough. The holes are provided in a plurality of rows extending along the length of the sheet. The sheet has a smaller thickness in the area extending along each row of holes than in its remaining portions.Type: GrantFiled: May 4, 1982Date of Patent: December 17, 1985Assignee: Junkosha Company Ltd.Inventor: Hirosuke Suzuki
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Patent number: 4549171Abstract: Oil floating on the surface of a body of water can be detected by the floating sensor of this invention which comprises a float having a central opening vertically therethrough and containing an electrical sensor, the lead wire connected to the sensor extending downwardly through the opening, forming a U-bend and extending upwardly through the opening to alarm means. A weight at the U-bend provides for automatic height adjustment of the detector as the surface of the body of water raises or lowers.Type: GrantFiled: January 4, 1984Date of Patent: October 22, 1985Assignee: Junkosha Company Ltd.Inventors: Juji Akiba, Satoru Kobayashi, Hiroyuki Sugibuchi
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Patent number: 4547424Abstract: A composite laminated article is provided, useful for printed circuit boards in transmission of electrical signals in the high frequency range of the order of 10 GHz, comprising a layer of expanded, porous polytetrafluoroethylene (PTFE), maintained in a fully stretched state, affixed firmly to a solid substrate layer. The composite is formed by stretching extruded, unsintered PTFE, after removal of lubricant, holding the stretched PTFE in its fully stretched state, and bonding the stretched PTFE to a substrate. The porous PTFE layer in this composite has unexpectedly high compression resistance.Type: GrantFiled: April 1, 1985Date of Patent: October 15, 1985Assignee: Junkosha Company, Ltd.Inventor: Hirosuke Suzuki
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Patent number: 4525020Abstract: A connector is provided comprising a first housing which holds a number of contacts for the conductors of a strip-line electrical cable, and a second housing which provides contact pressure between the conductors and the contacts at a cable end that is separated into two layers. The connector is suitable for a flat cable in which the conductors are arranged such that narrow signal conductors and wider ground conductors are arranged in pairs on opposite sides of the cable and are alternately arranged transversely across the cable.Type: GrantFiled: September 13, 1983Date of Patent: June 25, 1985Assignee: Junkosha Company Ltd.Inventor: Hiromi Yasumoto
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Patent number: 4525693Abstract: A transmission line is provided, at least a portion of the wave energy transmitting part of the line being made of a dielectric material shaped to create a physical condition which preserves the deflected wave surface of the electromagnetic wave along the portion of the transmission line. The physical condition for preserving the deflected wave surface is formed by providing at least one linear portion which retards the speed of energy transmission so as to prevent the rotation of the electric field surface of the electromagnetic wave. The wave energy transmitting portion composed of dielectric material is preferably made to have an oval cross-section in which the ratio between the major axis and the minor axis has a value not lower than 4/3. Alternatively, the wave energy transmitting portion can be made to have a rectangular cross-section.Type: GrantFiled: April 11, 1983Date of Patent: June 25, 1985Assignee: Junkosha Company Ltd.Inventors: Hirosuke Suzuki, Hajime Ohki
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Patent number: 4490690Abstract: A stripline cable is provided comprising a dielectric layer and a plurality of sets of narrow signal conductors and wider ground conductors which are disposed in confronting relation to each other with the dielectric layer sandwiched therebetween. The signal and ground conductors are alternately arranged transversely of the conductors. The dielectric layer is preferably made of porous polytetrafluoroethylene resin. With this arrangement, crosstalk in the stripline can be greatly reduced and signals can be transmitted at higher speeds over the stripline.Type: GrantFiled: April 22, 1982Date of Patent: December 25, 1984Assignee: Junkosha Company, Ltd.Inventor: Hirosuki Suzuki
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Patent number: 4368766Abstract: A self-cooling water container is provided capable of keeping the temperature of the contained water lower than the ambient temperature by utilizing the heat of water vaporization. The disclosed water container is comprised of a water repellant, continuously porous resin material or a gas permeable laminate including the porous material as a major ply element.Type: GrantFiled: December 23, 1980Date of Patent: January 18, 1983Assignee: Junkosha Company, Ltd.Inventor: Haruo Nomi