Tire molding matrix

Details Tire molding matrix Tire molding matrix

1974-07-15

1979-05-15

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Reshaping, resizing or vulcanizing means for tire, tire...

425 35, 425 46, B29H 502

Patent

active

041545648

ABSTRACT:
A tire molding matrix comprising a plurality of projections on the tread molding surface of the matrix, the projections being for molding a first, radially outer and a second radially inner, pattern in the tread of the tire incorporating at least one main drainage groove, the configuration of the projections changing distinctively at a predetermined level which is substantially parallel to the surface of the matrix for molding the tread ground-contacting surface of the tire and which is situated at a depth which is a predetermined amount less than the depth of the projection for molding the main drainage groove, the second pattern comprising a wholly radial extension of only a part of the first pattern.

REFERENCES:
patent: 2246479 (1941-06-01), Schrank
patent: 2644984 (1953-07-01), Crooker
patent: 2679663 (1954-06-01), Schwenker et al.
patent: 2706509 (1955-04-01), White
patent: 2732589 (1956-01-01), Steadman
patent: 2756460 (1956-07-01), Heintz
patent: 2770013 (1956-11-01), Crooker
patent: 2848744 (1958-08-01), Crooker
patent: 2896281 (1959-07-01), Miller et al.
patent: 3432888 (1969-03-01), Brierley
patent: 3467989 (1969-09-01), Youngblood et al.
patent: 3546749 (1970-12-01), Wissel
patent: 3553790 (1971-01-01), Brobeck et al.

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