Patents by Inventor Henk Joppen

Henk Joppen 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).

  • Processes and apparatuses for perforating smooth, closed-cell surfaces of open-cell plastic foam sheets
    Patent number: 6103163
    Abstract: Open-cell plastic foam sheets with smooth, closed surfaces are heated up to a predetermined temperature after extrusion, are thermoformed in a thermoforming unit with the aid of a vacuum on both sides and are thermoset. One of the two closed surface skins of the plastic foam sheet is perforated with the aid of needles 4 arranged movably in a mold block 11. The mold block 11 is a component part of a thermoforming unit 10 and, together with a further mold block 9, forms the mold of this thermoforming unit. The mold block 11 for the inner side 13 of a plastic foam sheet 16 includes a male mold 1, a cooling plate 2, a vacuum plate 3, the movable needles 4, a needle plate 5, springs 6 for the return of the needle plate and also diaphragms 7 and a mounting plate 8, which are held together by screws 30.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: August 15, 2000
    Assignee: Depron B.V.
    Inventors: Henk Joppen, Paul Daniels, Jan op den Buijsch
  • Processes and apparatuses for perforating smooth, closed-cell surfaces of open-cell plastic foam sheets
    Patent number: 5720915
    Abstract: Open-cell plastic foam sheets with smooth, closed surfaces are heated up to a predetermined temperature after extrusion, are thermoformed in a thermoforming unit with the aid of a vacuum on both sides and are thermoset. One of the two closed surface skins of the plastic foam sheet is perforated with the aid of needles 4 arranged movably in a mold block 11. The mold block 11 is a component part of a thermoforming unit 10 and, together with a further mold block 9, forms the mold of this thermoforming unit. The mold block 11 for the inner side 13 of a plastic foam sheet 16 comprises a male mold 1, a cooling plate 2, a vacuum plate 3, the movable needles 4, a needle plate 5, springs 6 for the return of the needle. plate and also diaphragms 7 and a mounting plate 8, which are held together by screws 30.
    Type: Grant
    Filed: December 8, 1995
    Date of Patent: February 24, 1998
    Assignee: Depron B.V.
    Inventors: Henk Joppen, Paul Daniels, Jan op den Buijsch