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US 4,187,271 AGranted
Method of making same
AssigneeOwens-Corning Fiberglas Corporation
InventorsJ. Albert Rolston, Thomas E. Philipps
Life of this patent
Estimating the term…
Abstract
Method of making a casing reinforced by a stretchable glass fiber preform is disclosed. The casing may be reinforced by metal or a glass fiber mat which is shaped to provide positive engagement with the stretchable fiber preform before its impregnation by a matrix-forming resin.
Claims9
A method for making a casing comprising:
- (a) inserting a fibrous preform into a first end of a fibrous sleeve, said preform being configured to interlock said sleeve with an encircling preformed ring and without said ring form a head for said casing;
- (b) expanding an expandible core within said fibrous preform and said sleeve to expand said preform and said sleeve into said ring within a mold;
- (c) introducing hardenable resin between said expandible core and inner walls of said mold to impregnate said fibrous sleeve and said fibrous preform;
- (d) hardening said resin to form said casing;
- and removing said casing from said mold.
2 more elements
In a method for making a tubular casing having a closed end, the steps comprising:
- (a) inserting a fibrous preform into a first end of a fibrous sleeve, said preform being configured to interlock said sleeve with an encircling preformed ring and with said ring form a head for said casing;
- (b) expanding said preform within said ring to interlock said sleeve with said ring.
Dependencies are inferred from the claim text.