Patents by Inventor Jelis DE Jonge

Jelis DE Jonge 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).

  • Method of manufacturing a die for duplicating plastics information carriers
    Patent number: 4440586
    Abstract: The invention relates to a method of reproducing plastics record carriers, in particular duplicating video records. According to the invention, a metal die is used which is provided with a thin-liquid molding resin of a particular composition which can be polymerized by radiation. A radiation-pervious substrate which is manufactured from synthetic material, for example polymethylmethacrylate, is provided on the molding resin. The molding resin is exposed to light via the substrate after which the cured molding resin together with the substrate connected thereto is removed from the die. The molding resin used in the process comprises low-molecular monomers or oligomers which contain on an average 25-70% by weight of hydrocarbon groups and/or phenyl groups. The molding resin is aprotic and has a functionality as regards unsaturatedness which is between the values 2 and 6. A suitable molding resin contains mono-, tri- or tetra esters of acrylic acid.
    Type: Grant
    Filed: October 27, 1980
    Date of Patent: April 3, 1984
    Assignee: U.S. Philips Corporation
    Inventors: Gerardus J. M. Lippits, Arnoldus J. M. Van Den Broek, Adriaan J. G. Op Het Veld, Rinse Dijkstra, Jelis De Jonge
  • Method of duplicating plastics information carriers
    Patent number: 4275091
    Abstract: The invention relates to a method of reproducing plastics record carriers, in particular duplicating video records. According to the invention, a metal die is used which is provided with a thin-liquid molding resin of a particular composition which can be polymerized by radiation. A radiation-pervious substrate which is manufactured from synthetic material, for example polymethylmethacrylate, is provided on the molding resin. The molding resin is exposed to light via the substrate after which the cured molding resin together with the substrate connected thereto is removed from the die. The molding resin used in the process comprises low-molecular monomers or oligomers which contain on an average 25-70% by weight of hydrocarbon groups and/or phenyl groups. The molding resin is aprotic and has a functionality as regards unsaturatedness which is between the values 2 and 6. A suitable molding resin contains mono-, tri- or tetra esters of acylic acid.
    Type: Grant
    Filed: November 16, 1979
    Date of Patent: June 23, 1981
    Assignee: U.S. Philips Corporation
    Inventors: Gerardus J. M. Lippits, Arnoldus J. M. Van Den Broek, Adriaan J. G. Op Het Veld, Rinse Dijkstra, Jelis De Jonge
  • Method of manufacturing a variable capacitor
    Patent number: 4089093
    Abstract: A method of manufacturing variable capacitors having dielectric-coated sheets. The dielectric is permanently connected to the sheets and is provided by vapor deposition before assembly of the capacitors. The dielectric is preferably a polyparaxylylene material.Electrical contact between the rotor sheets is obtained by arranging the sheets on the rotor shaft with a slight press fit, with or without insertion of spacing rings.Electrical contact between the stator sheets may be obtained by a scratching or grinding operation on the side of the stator stack, or by a layer of solder.
    Type: Grant
    Filed: October 17, 1975
    Date of Patent: May 16, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Jan Lefeber, Jelis DE Jonge