Ventilating construction and method of making the same
AssigneeDalen Products, Inc.
InventorEdward N. Caldwell
Life of this patent
Estimating the term…
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.
Claims23
In a ventilating construction comprising a sheet of material having an opening means therethrough and a flap means hinged to said sheet for opening and closing said opening means, the improvement wherein said 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 said walls and interconnected thereto and wherein said flap means comprises a section of said sheet cut therefrom to define said opening means and having at least part of one edge thereof being uncut so as to be integral and one-piece with one of said walls to provide a natural hinge therewith.
In a ventilating cold frame construction comprising a sheet of material forming an outer wall means of said cold frame construction having an opening means therethrough and a flap means hinged to said sheet for opening and closing said opening means, the improvement wherein said 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 said walls and interconnected thereto and wherein said flap means comprises a section of said sheet cut therefrom to define said opening means and having at least part of one edge thereof being uncut so as to be integral and one-piece with one of said walls to provide a natural hinge therewith.
In a method of making a ventilating construction comprising the step of forming a sheet of material to have an opening means therethrough and a flap means hinged to said sheet for opening and closing said opening means, the improvement comprising the steps of forming said sheet to comprise 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 said walls and interconnected thereto, and forming said flap means to comprise a section of said sheet cut therefrom to define said opening means and have at least part of one edge thereof being uncut so as to be integral and one-piece with one of said walls to provide a natural hinge therewith.
Dependencies are inferred from the claim text.