Perforated material

Details Perforated material Perforated material

1989-05-12

1991-08-20

Seidleck, James J.

Stock material or miscellaneous articles

Hollow or container type article

Nonself-supporting tubular film or bag

206390, 383 37, 428 43, 428906, B65D 3000

Patent

active

050413171

ABSTRACT:
Continuous rolled material is described which is formed as lay flat tubing and which has lines of perforations running transversely to the axis of the material and dividing the material into discrete units. Alternate lines of perforations are sinusoidal lines. There are cuts in these lines of perforations at the mid-portions between the crests of the sinusoidal lines. The remaining perforations are arranged so that the transverse components of their lengths are substantially constant. Other kinds of perforated continuous material are also described.

REFERENCES:
patent: 3762542 (1973-10-01), Grimes
patent: 3851760 (1974-12-01), Smith
patent: 3931886 (1976-01-01), Yamauchi
patent: 4309468 (1982-01-01), St. Aubin
patent: 4318235 (1982-03-01), Augeri
patent: 4681785 (1987-07-01), Horn
patent: 4890736 (1990-01-01), Greyvenstein

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