Expandable pintle wires
OwnerRobert L. Crook, Ian Christison Sayersinventors
Life of this patent
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Abstract
A pintle wire (10) for insertion through interdigitating end loops of a belt fabric or of a spiral connector, is disclosed which is expandable after insertion into the seam, for example by way of a sheath (12) which includes a thermally activated expanding agent. This is subject to heating to expand the sheath (12) , causing the pintle wire (10) to swell and fill voids in the seam area reducing permeability in the seam and thus reducing marking of paper webs carried by the belt.
Claims32
A seam construction in a papermachine fabric, said seam construction comprising:
- a pintle wire having at least one strand of a material, said material being expanded by at least one of a physical means and a chemical means, after introduction of said pintle wire into said seam construction for joining a respective end seam.
A seam construction in a seam area of a papermachine fabric, said seam construction being formed by two ends coming together, each said two ends having at least one loop and being opposing interdigitized loops, said seam construction comprising:
- a pintle wire for joining said ends of said seam construction, said pintle wire having a core and at least one sheath surrounding said core and being passed through each of said opposing interdigitized loops of said ends positioned in said seam construction;
- and
- at least one of said core and said sheaths being formed of expandable material and being expanded by an outside stimulus to form protrusions on said pintle wire, said protrusion bulging through gaps between said opposing interdigitized loops for filling voids in the seam area of said seam construction.
A seam construction in a papermachine fabric, said seam construction comprising:
- a pintle wire having at least one filament of a material, said material being expandable by an outside stimulus consisting of at least one of a physical means and a chemical means after introduction of said pintle wire to join a respective end seam.
Dependencies are inferred from the claim text.