Ventilating construction and method of making the same
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United States of America Patent
Stats
-
Mar 7, 1989
Issued Date -
N/A
app pub date -
Oct 1, 1987
filing date -
Aug 11, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ventilating construction, such as for a cold frame or for other desired structures, and method of making the same are provided, the ventilating construction comprising a sheet of material having an opening therethrough a flap hinged to the sheet for opening and closing the opening. The sheet comprises two like walls of polymeric material disposed in spaced apart substantially parallel relation with a plurality of spaced apart substantially parallel ribs of polymeric material disposed between the walls and interconnected thereto. The flap comprises a section of the sheet cut therefrom to define the opening and having at least part of one edge thereof being uncut so as to be integral and one-piece with one of the walls to provide a natural hinge therewith.
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