Patents by Inventor Christiaan Antonius Jagers

Christiaan Antonius Jagers 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).

  • Patent number: 6277896
    Abstract: A method for manufacturing a plastic object may include the steps of: (a) providing an injection moulding device with a mould that includes two mould parts which in a closed position define a mould cavity; (b) providing foaming means for causing foaming in the mould cavity of plastic injected into the mould cavity; (c) providing blocking means for temporarily rendering the foaming means effectively inactive; (d) energizing the blocking means; (e) choosing as plastic a mixture of two plastics, wherein the first plastic is a non-type A plastic and the second plastic is a type A plastic that constitutes a maximum of roughly 30 percent by mass of the mixture, wherein the type A plastic is a plastic with high melt strength compatible with the first plastic, for instance HMS PP which is high-melt-strength polypropylene; (f) causing a formed object to cool to a chosen temperature, opening the mould cavity and removing the cooled object.
    Type: Grant
    Filed: August 17, 1999
    Date of Patent: August 21, 2001
    Assignee: Corell Resin Technology B.V.
    Inventors: Cornelis Willem Roth, Johan Boshuis, Franciscus Egbertus Richters, Andreas Bernardus Eidhof, Christiaan Antonius Jagers, René de Jong
  • Patent number: 6193916
    Abstract: A method for manufacturing a plastic board comprising a sandwich-like structure comprises the steps of: (1) providing an injection moulding device with a mould which comprises at least two mould parts displaceable relative to each other by displacing means, which mould parts in a closed first extreme position bound a mould cavity connecting onto an injection unit and in an open second extreme position release a formed board for removal; (2) providing foaming means for causing foaming in the mould cavity of plastic injected into the mould cavity; (3) providing blocking means for temporarily rendering the foaming means inactive; (4) energizing the blocking means; (5) energizing the injection unit in the first extreme position of the mould; (6) ending the energizing of the blocking means; (7) ending the energizing of the injection unit; and (8) displacing the mould parts relative to each other.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: February 27, 2001
    Assignee: Corell Resin Technology B.V.
    Inventors: Franciscus Egbertus Richters, Johannes Düring, Andreas Bernardus Eidhof, Christiaan Antonius Jagers