B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
18/133
B29D 30/56 (2006.01)
Patent
CA 1078120
ABSTRACT OF THE DISCLOSURE The present invention provides a process for retreading a worn tyre by the direct application to the carcass of the tyre of a premoulded tread. In the process a sheet of adhesive mater- ial is prepared which anchors the tread to the carcass of the tyre. The sheet is prepared from an admixture comprising, at least one non-vulcanized bonding material, at least one vulcanization accelerator, at least one vulcanizing agent, a high percentage in weight of co-vulcanizing resins, and an agent for the prevention of scorching. The sheet of adhesive material is bonded to the inner surface of the tread by means of rolling and simultaneously with the rolling air trapped between the tread and the sheet of adhesive material is expelled via the perforations formed in the said sheet of adhesive material. The assembly of premoulded tread is applied to the rolling surface of the carcass with the sheet forming an intermediate layer. The assembly and carcass are then enshrouded by a casing in a gas-tight manner and put in a vulcanization oven where vulcanization is effected.
242972
Ital-Rubber S.r.i.
Na
LandOfFree
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