US 4,399,763 AGranted

Method of making dual-ply plant bed cover

OwnerMarvin C. Alexanderinventor

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Abstract

The present invention relates to a dual-ply fumigation and plant bed cover including an imperforated plastic type cover that acts to effectively seal a plant bed during fumigation and a cloth type cover for providing basic plant protection during the early growth of plants within the covered plant bed. The plastic type cover is stitched to the cloth type cover about a tear seam in order that at a selected time the plastic type cover can be torn or stripped away from the cloth type cover, leaving the cloth type cover stretched over the plant bed. To form the tear seam, a tape cloth strip is secured over the plastic layer about each side, and stitches are sewn through the tape cloth, plastic, and cloth layers. As a part of the method of the present invention, as disclosed herein, after seeding, the plastic type cover may remain intact with said cloth type cover until seed germination, so as to effectively expedite seed germination because of a greenhouse effect realized by the plastic type cover.

Claims4

Dependent claims

A method of forming a dual-ply plastic-cloth type plant bed cover, comprising the steps of:

pulling a plastic sheet having two side edges from a roll of plastic;
pulling a cloth type sheet having two side edges from a roll of cloth;
directing the plastic and cloth type sheets together in relatively closed back-to-back relationship and pulling the two sheets together over at least one idler;
directing each of the two sheets through centering control means for maintaining the respective sheets in alignment with each other and continuing to pull said sheets through said centering control means;
feeding a relatively narrow tape cloth onto both sides of the two sheets;
directing the two sheets and tape cloth strips to a dual head stitching system and aligning the tape cloth strip and adjacent plastic and cloth type sheets on one side with one stitching head and aligning the tape cloth strip and adjacent plastic and cloth sheets about the other side with the other stitching head;
pulling the tape cloth strips and adjacent plastic and cloth type sheets through said stitching heads;
stitching the tape cloth strip and adjacent plastic and cloth sheets together about both sides to form a dual-ply plastic-cloth plant bed cover;
punching anchor holes through said tape cloth strips and adjacent plastic and cloth type sheets about both sides of said dual-ply plant bed cover at selective intervals;
directing the dual-ply plant bed cover to a cutting device;
and cutting the fabricated dual-ply plant bed cover at selected integrals to form a fabricated and finished dual-ply plant bed covers.

8 more elements

Dependencies are inferred from the claim text.