Shirred tubular material
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United States of America Patent
Stats
-
Feb 7, 1989
Issued Date -
N/A
app pub date -
Aug 15, 1984
filing date -
Nov 1, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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