Shirred tubular material

Details Shirred tubular material Shirred tubular material

1984-08-15

1989-02-07

Bryant, III, James E.

Pipes and tubular conduits

Flexible

Casing

138122, 138177, 17 1R, F16L 1110

Patent

active

048025119

ABSTRACT:
Shirred tubular material comprising a plurality of outer folds arranged along at least two parallel and two counter-directional parallel, longitudinal extending, crisscrossing helixes and inner folds connecting opposing points of diamond shapes defined by said outer folds is disclosed together with a method for its preparation comprising repeatedly applying a set of shirring forces, each of the forces in the set being simultaneously at circular circumferential equally spaced positions along a plurality of equidistant helical lines within the periphery of said tubular material to shirr such material.

REFERENCES:
patent: 3682371 (1972-08-01), Saika
patent: 3704483 (1972-12-01), Urbutis et al.
patent: 4125130 (1978-11-01), Yamamoto
patent: 4487231 (1984-12-01), Wolf et al.
patent: 4648428 (1987-03-01), Story

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