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Device for incorporating individual reinforcing threads into an unfinished tube and process for manufacturing a thread-reinforced unfinished tube with the aid of this device

  • US 6,494,980 B1
  • Filed: 10/08/1999
  • Issued: 12/17/2002
  • Est. Priority Date: 10/12/1998
  • Status: Expired due to Term
First Claim
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1. A device for applying a plurality of individual reinforcing threads onto a tubular layer of polymer material that is additionally processed into a thread-reinforced unfinished tube of polymer material of a plurality of layers, said device comprising a positioning ring with at least one row of equidistant holes on a circumferential line, whereby a reinforcing thread is guided from radially outward to radially inward through each hole at an inlet angle relative to the longitudinal axis of the positioning ring,a rotationally symmetric, funnel-shaped deflection element forming one continuously tapering channel with an annular inlet opening and a smaller annular outlet opening, whereby the reinforcing threads are guided on the radially inner surface of said deflection element, at the annular inlet opening, the deflection element has an inlet angle α

  • relative to the longitudinal axis of the deflection element, which essentially corresponds to the annular inlet angle of the reinforcing threads relative to a longitudinal axis of the positioning ring, said inlet angle being defined by the intersection of the positioning ring and the annular inlet opening at the annular outlet opening, the deflection element has an outlet angle β

    relative to a longitudinal axis of the deflection element that lies between 0° and

    25°

    , and the deflection element is concentric with and surrounded by the positioning ring at its annular inlet opening and axially aligned relative to the positioning ring and in contact with said positioning ring in such a way that reinforcing threads that are radially guided through the holes of the positioning ring can be directly guided into the inlet opening of the deflection element.

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