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US 6,318,985 B1Granted
Two-piece segmented mold
AssigneeMichelin Recherche et Technique S.A.
InventorsJohn F. Heindel, Joe E. Birch, Jr., Richard A. Spivey, Lawrence W. Stachniak, Robert G. Tyler
Life of this patent
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Abstract
An improved two-piece segmented mold includes a plurality of tread mold segments mounted to a frustoconical seat in a mold back by a T-shaped guide bar inserted in a guide slot formed in the seat. The segments are biased to a normally closed position in abutment with adjacent segments and in abutment with a mold side plate.
Claims6
An improved two-piece segmented mold, comprising:
- a top half shell having a top side part and a top back part, the top back part having a frustoconical seat extending axially inward and radially outward from the top side part;
- a plurality of tread mold segments movably mounted to the seat to define a portion of a tread ring;
- biasing means to urge the tread mold segments to a closed position in mutual abutment and in abutment with the top side part;
- a bottom half shell having a bottom side part and a bottom back part, the bottom back part having a frustoconical seat extending axially inward and radially outward from the bottom side part;
- a plurality of tread mold segments movably mounted to the seat to define a portion of a tread ring;
- and,
- biasing means to urge the tread mold segments to a closed position in mutual abutment and in abutment with the bottom side part.
4 more elements
Dependencies are inferred from the claim text.