Apparatus for preparing tread bands for use in tire retreading

Details Apparatus for preparing tread bands for use in tire retreading Apparatus for preparing tread bands for use in tire retreading

1977-04-21

1978-09-05

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

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

Toroidal or annular female shaping means and coacting means...

B29H 502

Patent

active

041116194

ABSTRACT:
A sinker unit for preparing an annular unvulcanized tread band comprises an annular mold for supporting the tread band and an expandable annular sinker member for forcing the tread band against the inner surface of the mold. The sinker member includes side walls which are resiliently biassed outwardly so that the sinker member is maintained in a tensioned condition when it is forced against the tread band. The sinker member may be forced against the tread band by means of an expanding air bag underneath the sinker member.

REFERENCES:
patent: 3775528 (1973-11-01), Benege
patent: 3871941 (1975-03-01), Wasko

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