B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
B29D 30/54 (2006.01) B29D 30/56 (2006.01)
Patent
CA 2120473
ABSTRACT An improved Process to Manufacture pre-cured treads to rebuild tire treads and the improved vulcanizable rubber composition for use in such process in which it is essentially foreseen self-adhesive to: (a) arrange a layer of self adhesive vulcanizable rubber composition having from 65% to 75% of natural rubber, from 15 to 30% of strengthening mineral pigments and from 10 to 15% of curing chemical reactants, onto the lower face of the crude tread body to be bonded to the tire body, before the pre-curing of the tread body , (b) putting a protective plastic sheet under the said vulcanizable rubber layer and (c) pre-curing in a vulcanizing press the said tread structure formed by the tread body, the said lower vulcanizable rubber layer and the said lowermost protective plastic sheet, thus obtaining a pre-cured tire tread element which may be vulcanized and bonded onto a tire carcass,from which the workout original tread was removed, specification.
Heenan Blaikie Llp
Industria de Artefatos de Borracha Rizi S/a
Ramos Sergio
LandOfFree
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