Patents Assigned to Showa Electric Wire & Cable
  • Patent number: 4766843
    Abstract: This invention concerns particularly a rubber or plastic-coated roller such as a fixing roller to be used in a thermal fixing part of an electrophotographic copying machine, and a method and an apparatus for production thereof.
    Type: Grant
    Filed: August 1, 1986
    Date of Patent: August 30, 1988
    Assignee: Showa Electric Wire & Cable Co, Ltd.
    Inventors: Takatoshi Murakami, Toshio Kida, Shiji Kon, Toshinobu Asai, Yoshiyuki Nunome
  • Patent number: 4735858
    Abstract: A heat-resistant prepreg uses at a substrate a heat-resistant material made of heat-resistant organic fibers, inorganic fibers, etc. and as a matrix a heat-resistant mixture containing at least 10% by weight of a borosiloxane resin composition. This heat-resistant prepreg is obtained by impregnating the substrate at a temperature in the range of 200.degree. to 300.degree. C. to such an extent that at least 20% of the amount of phenyl groups bonded to silicon atoms in the aforementioned borosiloxane resin composition prior to the impregnating and drying steps will remain after the heat treatment.
    Type: Grant
    Filed: July 18, 1986
    Date of Patent: April 5, 1988
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventors: Etsuo Hosokawa, Hiroshi Hashimoto
  • Patent number: 4732722
    Abstract: A crosslinked polyolefin insulated power cable with remarkably improved AC breakdown voltage and impulse withstand voltage has been obtained by a process which comprises extrustion-coating, on the outer surface of a conductor, (1) a material for the formation of an inner semiconductive layer, comprising a base polymer and N-vinylcarbazole, (2) a crosslinkable polyolefin material for the formation of a crosslinked polyolefin insulating layer and (3) a material for the formation of an outer semiconductive layer in this order and then subjecting the coated conductor to a crosslinking treatment to form, on the outer surface of the conductor, an inner semiconductive layer, a crosslinked polyolefin insulating layer and an outer semiconductive layer in this order.
    Type: Grant
    Filed: November 14, 1985
    Date of Patent: March 22, 1988
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventors: Fumio Aida, Takeo Shiono, Misao Hanai, Shahrzad Tassavori
  • Patent number: 4692799
    Abstract: An automatic inspection system detects foreign materials included in a sheet of transparent or translucent resin material such as a polyethylene compound. The automatic inspection system comprises an extruder for extruding a resin material into a sheet, means for withdrawing the extruded sheet along a path of travel, means disposed between the extruder and the withdrawing means for permitting the sheet to having down by gravity into a U-shape, sensor means for detecting a vertical position of the U-shaped portion of the sheet, controller means for adjusting the speed of sheet withdrawal for the withdrawing means in response to the output signal from the sensor means, a source of light disposed on one side of the path of travel of the sheet, an image sensor camera disposed on the other side of the path of travel of the sheet in confronting relation to the source of light for receiving light emitted from the source of light and having passed through the sheet to detect foreign materials included in the sheet.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: September 8, 1987
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventors: Michihiro Saitoh, Takatoshi Gogami, Toshiyuki Osada
  • Patent number: 4684906
    Abstract: There is disclosed a solid ultrasonic delay line comprising a solid ultrasonic delay medium on which polygonal multiple-reflective surfaces are formed. An input transducer for radiating longitudinal waves is disposed on one of the reflective surfaces. The longitudinal waves are transformed into transverse waves by other one of the reflective surfaces and then reconverted by yet other one of the reflective surfaces into longitudinal waves which enter an output transducer disposed on still other one of the reflective surfaces. Ultrasound absorbers cover at least portions of the main boundary surfaces perpendicular to the reflective surfaces. Spurious waves of the longitudinal waves radiated from the input transducer are transformed by the main boundary surfaces into transverse waves which enter the absorbers.
    Type: Grant
    Filed: May 28, 1986
    Date of Patent: August 4, 1987
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventor: Takeo Yokoyama
  • Patent number: 4682849
    Abstract: There are disclosed an optical fiber junction device and a method of making the same. The method comprises the steps of providing a central inner pipe or rod of glass, arranging a plurality of optical fibers around the inner pipe or rod, and externally heating the optical fibers and the central inner pipe to form a thermally fused assembly having cores of a sectorial cross section. The inner pipe may include a tapered portion having a reduced diameter. The optical fibers may comprise optical fiber junction units each composed of a plurality of optical fibers.
    Type: Grant
    Filed: February 19, 1986
    Date of Patent: July 28, 1987
    Assignee: Showa Electric Wire & Cable Co. Ltd.
    Inventors: Nobuo Kowata, Naoshige Sasano
  • Patent number: 4585603
    Abstract: There is disclosed a method for controlling an extrusion line for foamed insulation cables. In this method, a foaming insulation compound composed of a polyolefin resin and a foaming agent is supplied to an extruder, and extruded and coated as a foamed insulation onto a continuously fed cable conductor at a temperature higher than a decomposition temperature of the foaming agent to produce a cable that is subsequently passed through a cooler unit for controlling the outside diameter and electrostatic capacity of the foamed insulation.
    Type: Grant
    Filed: March 8, 1983
    Date of Patent: April 29, 1986
    Assignee: Showa Electric Wire & Cable Co., Ltd
    Inventors: Katsuhisa Furuta, Yoshinori Nakamura, Kazuhiko Asaka
  • Patent number: 4508251
    Abstract: A cable pulling/feeding apparatus comprises a fixed base, a cable pulling/feeding unit having a drive/brake unit for pulling or feeding a cable, a sensor supported on the fixed base so as to be movable in both directions in which the cable is pulled and fed for detecting a load imposed between the cable pulling/feeding unit and the fixed base and for generating an electric signal dependent on the load as detected, and structure for determining a load applied to the drive/brake unit in response to the electric signal when the cable is pulled or fed.
    Type: Grant
    Filed: October 26, 1982
    Date of Patent: April 2, 1985
    Assignees: Nippon Telegraph and Telephone Public Corp., Showa Electric Wire & Cable Co.
    Inventors: Kazuhiro Harada, Yuzoh Tsuchiya, Nobuo Sekiguchi, Toshio Ishikawa
  • Patent number: 4477624
    Abstract: A heat-resistant synthetic resin composition, which comprises (A) 15 to 60% by weight of a film-forming synthetic resin soluble in a phenolic solvent and (B) 85 to 40% by weight of a phenolic solvent, said film-forming synthetic resin containing at least 30% by weight of a polyamide imide type resin obtained by causing (a) a tricarboxylic acid and/or an anhydride thereof containing citric acid and (b) a diisocyanate and/or a derivative obtained by masking diisocyanate with a phenolic compound in amounts of substantially equal moles to react in the phenolic solvent.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: October 16, 1984
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventor: Misao Waki
  • Patent number: 4477045
    Abstract: There is disclosed a method of controlling the level of a self-levelling device comprising a table to be controlled in level, an air spring supporting the table, a sensor for contactless detection of an amount of displacement of the table from a reference position, an inlet valve for supplying air under pressure to the air spring through an inlet port therein, and an outlet valve for discharging air from the air spring through an outlet port therein. An interval of time for actuating the inlet valve and/or the outlet valve to return the table to the reference position is computed from the amount by which the table is displaced. The inlet and/or outlet valve is then actuated for the calculated interval of time to adjust the table level through the air spring.
    Type: Grant
    Filed: October 20, 1981
    Date of Patent: October 16, 1984
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventors: Kohichi Karasawa, Takeo Itoh, Humihito Koizumi, Kimio Uchida
  • Patent number: 4468567
    Abstract: A liquid level detecting device, which has a low transmission loss and may be miniaturized, comprising a plurality of optical fibers each composed of a core made of a transparent material and a cladding layer covering the core therewith and made of another transparent material having a lower refractive index than that of the former transparent material forming the core, end portions of the optical fibers being placed in adjacent to each other in either parallel arrangement or that attained by making an acute angle with each other, and a detecting portion which is obtained by heating the adjacent end portions of these optical fibers to fuse one another and shaping into a spherical form due to the surface tension of the fused material.
    Type: Grant
    Filed: May 17, 1982
    Date of Patent: August 28, 1984
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventors: Naoshige Sasano, Nobuo Kowata
  • Patent number: 4467295
    Abstract: There is disclosed a solid ultrasonic delay line which comprises a delay medium having two parallel major faces and at least three end faces intersecting the major faces, an input transducer bonded to one of the end faces and polarized in a direction parallel to the major faces for transmitting an ultrasonic signal in a shear mode into the delay medium, and an output transducer bonded to one of the end faces for converting the ultrasonic signal having propagated through the delay medium into an electrical signal. The input and output transducers have boundary surfaces lying flush with the two major faces of the delay medium, the major faces and the boundary surfaces being ground to a surface roughness which is one-twentieth or smaller of the wavelength of the ultrasonic signal propagating through the delay medium.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: August 21, 1984
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventors: Takeo Yokoyama, Ichiya Imai, Hideaki Asaoka
  • Patent number: 4406399
    Abstract: Disclosed is a method of controlling an enamelling oven, in which a plurality of controlled variables such as temperatures:Y=(Y1 . . . Yl)including a plurality of measured variables:(Y1 . . . Ym)are variable by any one of a plurality of manipulation variables such as the degrees of opening of dampers:U=(U1 . . . Um)where l and m are positive integers equal to or greater than 2 with m>l. The method comprises the step of controlling the controlled variables to reach reference values therefor:YR=(YR1 . . . YRl)by effecting integrating action on each of variable factors:U'c=(Uc1 . . . UcM)which are derived from the differences between the controlled variables and the reference values:Y-YR=(Y1-YR1 . . . Y-YRl)=(.epsilon.1 . . . .epsilon.l)to produce outputsUc=(Uc . . . UcM)which serve as the controlled variables, respectively.
    Type: Grant
    Filed: July 21, 1981
    Date of Patent: September 27, 1983
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventors: Katsuhisa Furuta, Takeshi Hirai, Yoshinori Nakamura
  • Patent number: 4405687
    Abstract: A polyborosiloxane composition to be used for the formation of an insulating layer on an electric conductor comprises (A) a polyborosiloxane produced by the reaction of boric acid, a boric acid derivative, or a halogenated boron with a silane compound and a silicone oil, (B) a silicone resin or a synthetic resin having a nitrogen-containing heterocyclic ring in the molecule, (C) an inorganic filler, and (D) a common solvent for (A) and (B). An insulated electric wire excellent in thermal resistance is obtained by applying the composition to an electric conductor and baking the applied layer of the composition.
    Type: Grant
    Filed: April 9, 1982
    Date of Patent: September 20, 1983
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventors: Minoru Morita, Etsuo Hosokawa, Kohzoh Arahara
  • Patent number: 4344061
    Abstract: A temperature-sensitive fuse comprises a first electric conductor electrically connected to one end of an electrically conductive casing; a second electric conductor which is connected to the other end of the casing in such a manner so as to be electrically insulated therefrom; a temperature-sensitive, fusible pellet disposed in the end portion of the casing containing the first conductor; a movable disc member which is disposed between the fusible pellet and the top portion of the second conductor, normally in contact with the top portion of the second conductor and the inner wall of the casing, and held by a spring in such a manner that when the fusible pellet melts and collapses at a predetermined ambient temperature, the movable disc is moved away from the top portion of the second conductor.
    Type: Grant
    Filed: September 5, 1980
    Date of Patent: August 10, 1982
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventor: Yoshio Niwa
  • Patent number: 4274108
    Abstract: Disclosed is an interleaved multiple signal separating circuit in which a luminance signal and a chrominance signal are separated by a circuit for adding a composite video input signal including the luminance signal and chrominance signal which is delayed by a predetermined period of time by an ultrasonic solid delay line to the composite video input signal and by a circuit for subtrating the delayed composite video input signal from the composite video input signal. The separating circuit comprises a series circuit of an input transducer of the ultrasonic solid delay line and a voltage division load connected to the input transducer. The input signal is applied to the series circuit. A delay output signal from the output transducer of the ultrasonic solid delay line and a signal across the voltage division load are combined to provide a sum signal and a difference signal thereof.
    Type: Grant
    Filed: June 27, 1979
    Date of Patent: June 16, 1981
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventors: Takeo Yokoyama, Kiyoshi Fukumoto, Hiroshi Matsuura
  • Patent number: 4237334
    Abstract: The present invention relates to a laminated insulating paper formed of cellulose paper or papers which is adhered to at least one side of cross-linked silicone grafted polyolefine film and to an oil-filled (OF) cable which insulated by the laminated insulating paper. The laminated insulating paper has outstanding peel strength as well as excellent non-solubility and anti-swelling properties in insulating oils.
    Type: Grant
    Filed: July 31, 1978
    Date of Patent: December 2, 1980
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventors: Takeshi Kojima, Sakae Kinoshita, Kenzo Takeuchi
  • Patent number: 4154269
    Abstract: A wire stock is continuously deformed into a coil and the coil is temporarily stored in a storing device as a bundle. The bottom of the storing device is periodically closed and opened for discharging the bundle into a receptor and for piling up the bundles one upon the other. By the impact force of a falling bundle, already accumulated bundles are compacted.
    Type: Grant
    Filed: August 31, 1977
    Date of Patent: May 15, 1979
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventors: Yamada Masahiko, Kagawa Kazuo
  • Patent number: 4152190
    Abstract: The splicer comprises a stationary block provided with a first V shaped groove for accommodating opposing ends of optical fibers, and an opening perpendicular to the groove. On the opposite sides of the stationary block there are provided a pair of slidable blocks provided with second grooves in alignment with the first groove and clamping means for clamping the fibers. The slidable blocks are moved toward and away from the stationary block by micrometers. A heater is provided in the opening for heating and fusing together the opposing ends of the optical fibers.
    Type: Grant
    Filed: November 18, 1977
    Date of Patent: May 1, 1979
    Assignee: Showa Electric Wire & Cable Co. Ltd.
    Inventors: Noboru Kurosawa, Naoshige Sasano
  • Patent number: 4136544
    Abstract: A cooling tube for cooling a hot rolled wire stock by cooling liquid is divided into a plurality of cooling sections by spaced apart partition members. Each partition member comprises a nozzle like rotary member having an axial passage for passing the wire stock. The inlet opening of the passage is circular having a diameter slightly larger than the major axis of the maximum oval cross-sectional configuration which is formed for the hot rolled wire stock when its size is changed, while the outlet opening is an oval having a major axis equal to the diameter of the inlet opening and a minor axis slightly larger than the diameter of the circular portion of the wire stock having the maximum diameter. The cross-sectional configuration of the passage gradually changes from the inlet opening to the outlet opening to prevent leakage of the cooling liquid.
    Type: Grant
    Filed: August 31, 1977
    Date of Patent: January 30, 1979
    Assignee: Showa Electric Wire & Cable Co., Ltd.
    Inventor: Yamada Masahiko