Plastics material mesh structure

Details Plastics material mesh structure Plastics material mesh structure

1984-11-26

1986-03-04

Thomas, Alexander S.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

428135, 428136, 428255, 428910, 2642888, 264DIG81, B29C 1702, B32B 324

Patent

active

045741000

ABSTRACT:
Plastics material mesh structures are made by providing a starting material having a pattern of primary holes or depressions and smaller secondary holes or depressions between the primary holes or depressions and stretching the plastics material to orientate the zones between adjacent holes or depressions to form orientated strands. A first stretch in a single direction produces intermediate structures having first mesh openings and smaller second mesh openings. A subsequent stretch at right angles to the first stretch produces structures having main orientated strands interconnected by shorter orientated strands arranged in such a way that only three strands meet at any junction.

REFERENCES:
patent: 3384530 (1968-05-01), Mercer et al.
patent: 3386876 (1968-06-01), Wyckoff
patent: 3616154 (1971-10-01), Dow et al.
patent: 3666609 (1972-05-01), Kalwaites et al.
patent: 4123491 (1978-10-01), Larsen
patent: 4303714 (1981-12-01), Mercer

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