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US 4,047,327 AGranted
Ground covering material
AssigneeBreveteam S.A.
InventorGunter H. Tesch
Life of this patent
Estimating the term…
Abstract
A vegetation suppressing, ground covering agronomic mulch sheet adapted for the prevention and/or control of undesirable plant growth is disclosed. The sheet is comprised of a web having a maximum light transmittance of about 60% and a minimum air permeability of about 200 1/m.sup.2 s at a pressure differential of 10 mm water.
Claims5
A vegetation suppressing, ground covering agronomic mulch sheet comprising a polymeric film having a light-absorbing effective quantity of pigmentation to provide a maximum light transmittance of about 60%;
- said film being slit in a pattern wherein slits having a length in the range of from about 4 mm to about 12 mm are arranged substantially uniformly in a plurality of rows, and wherein individual slits in a given row are opposite slits of identical dimension in adjacent rows;
- whereby there are provided a minimum slit density of at least 1,000 slits per square meter and a minimum air permeability of about 200 l/m.sup.2 s at a pressure differential of about 10 mm water across the plane of the sheet.
Dependencies are inferred from the claim text.