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US 4,239,245 AGranted
Packing seals and method of making
AssigneeA. W. Chesterton Company
InventorsRichard J. Giglio, Robert B. Bogosh, David A. Lasnier
Life of this patent
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Abstract
A method of making a packing seal comprising compression molding a thermo-setting plastic in a spiral mold so that a partially-cured spiral seal is formed, removing the partially-cured seal from the mold, and winding it on a mandrel of a selected diameter, curing the spiral seal on the mandrel, and removing the seal from the mandrel, whereby the resulting seal is resilient and can be used to seal any part having a diameter within a given range, which range has the diameter of the mandrel as a median.
Claims9
A method of making a packing seal comprising:
- compression molding a thermo-setting plastic in a spiral mold under heat so as to form a partially-cured spiral seal,
- removing said partially-cured spiral seal from said mold and winding it on a mandrel,
- applying heat to said mandrel and partially-cured seal so as to cure said seal, and
- removing said seal from said mandrel.
1 more element
Dependencies are inferred from the claim text.