Expanded perforated sheet having integral unexpanded sides and m

Details Expanded perforated sheet having integral unexpanded sides and m Expanded perforated sheet having integral unexpanded sides and m

1984-02-02

1986-06-10

Schofer, Joseph L.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

428131, 428136, 428596, 428613, 2104935, 210498, 338206, 291635R, 291635F, 264282, B21D 3104, B21D 1310, B21D 5304

Patent

active

045942803

ABSTRACT:
A perforated structure of expanded material, including at least one solid unstretched strip (4) parallel to the direction of expansion and of a length less than the length of the expanded region. The expanded region is formed with a tool that simultaneously cuts or perforates and expands the material.

REFERENCES:
patent: 2570692 (1951-10-01), Knight
patent: 2891303 (1959-06-01), Stevenson
patent: 3813743 (1974-06-01), Harrell et al.
patent: 4068366 (1978-01-01), Hillesheim
patent: 4124925 (1978-11-01), Barnett
patent: 4359181 (1982-11-01), Chisholm

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