Ventilating construction and method of making the same

Details Ventilating construction and method of making the same Ventilating construction and method of making the same

1987-10-01

1989-03-07

Joyce, Harold

47 17, 47 19, 47 28R, 47 29, 98 37, 98 422, F24F 700

Patent

active

048095923

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.

REFERENCES:
patent: 1392178 (1921-09-01), Kuebler
patent: 2728115 (1955-12-01), Corhelivs
patent: 3028872 (1962-04-01), Cresswell

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