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US 10,046,533 B2Granted
Method for retreading a vehicle tire casing and vehicle casing obtained by this method
AssigneesCompagnie Generale Des Etablissements Michelin, Michelin Recherche et Technique S.A.
InventorCedric Astier
Life of this patent
Estimating the term…
Abstract
In the method for retreading a vehicle tire casing, a fluid is injected into a casing between a tread and a tread backing in order to space them apart.
Claims12
A method for retreading a vehicle tire casing, comprising the steps of:
- passing a needle, which has a free end orifice with a positively pressurized fluid, into a thickness of an external wall of the casing until the orifice reaches a location between a tread and a carcass,
- injecting the fluid into an interface layer, which is made of a thermoplastic material and which has been softened by heating, between the tread and the carcass to create a bubble in the interface layer which spaces the tread and the carcass apart and forms a fluid enclosure extending at least partially around a main axis of the casing, and then
- grasping a portion of the tread which is contiguous with the fluid enclosure and peeling the tread from the casing from the grasped portion of the tread to entirely separate the tread from the carcass.
Dependencies are inferred from the claim text.