Method of manufacturing sealed rope and knotted netting from such rope
AssigneeAnza AB
InventorsJohannes Hospers, Gerhard ten Lohuis
Life of this patent
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Abstract
A method for producing a sealed rope of braided or twisted filaments. Heat-shrinkable filaments are braided or twisted about a core of a thermoplastic material to form a rope and the rope is placed under tension and treated to cause the thermoplastic core material to melt. Simultaneously the rope is maintained at a temperature sufficient to cause the heat-shrinkable filaments to shrink but not to melt, whereby the shrinking of the filaments, while the rope is under tension, reduces the cross section of the rope and causes the material to penetrate into the openings between and to surround and seal the filaments of the rope.
Claims9
A method for producing a sealed rope of braided or twisted filaments comprising forming a rope of braided or twisted, heat-shrinkable filaments about a core containing thermoplastic material, placing the rope under tension and, while under tension, treating the rope to cause the thermoplastic core material to melt while simultaneously maintaining the rope at a temperature sufficient to cause the heat-shrinkable filaments to shrink but not to melt, whereby the shrinking of the filaments, while the rope is under tension, reduces the cross section of the rope and causes the melted thermoplastic material to penetrate into the openings between and to surround and seal the filaments of the rope.
A method for producing a knotted netting of sealed rope of braided or twisted filaments comprising forming a rope of braided or twisted, heat-shrinkable filaments about a core containing thermoplastic material, knotting the rope to form a reticulated network of ropes, placing the knotted reticulated net under tension in all directions, and treating the net, while under tension, to cause the thermoplastic core material to melt while simultaneously heating the net to a temperature sufficient to cause the filaments to shrink but not to melt, whereby the shrinking of the filaments, while the net is under tension, reduces the cross section of the ropes of the net and causes the melted thermoplastic material to penetrate into the openings between and to surround and seal the filaments of the ropes of the net.
Dependencies are inferred from the claim text.