Pipes and tubular conduits – Flexible – Casing
Patent
1984-12-21
1987-03-10
Marcus, Stephen
Pipes and tubular conduits
Flexible
Casing
17 45, F16L 1110
Patent
active
046484280
ABSTRACT:
A shirred tubular material comprising a plurality of outer folds which when the tubular material is opened are arranged along at least two substantially parallel, longitudinally extending helixes. A method for forming the disclosed shirred tubular material is disclosed which comprises sequentially applying shirring forces through two or more sets of shirring elements wherein each successive member of a set applies shirring forces along a different continuous line than its immediate preceding member. The tubular material may contain reinforcing fibers.
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Crossetta William J.
Dunn Michael L.
Marcus Stephen
Teepak, Inc.
Thronson Mark
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