초록 ▼

A retreading method wherein a base composition and a cap composition are applied to a carcass (10) as two ribbons (14 ) and (16) extruded from separate extruders (18) and ( 20). The ribbons (14) and (16) can be layered and applied to a ready-to-retread carcass (10) simultaneously or, alternatively,

A retreading method wherein a base composition and a cap composition are applied to a carcass (10) as two ribbons (14 ) and (16) extruded from separate extruders (18) and ( 20). The ribbons (14) and (16) can be layered and applied to a ready-to-retread carcass (10) simultaneously or, alternatively, the base ribbon (14) can be applied to the ready-to-retread carcass (10) first and the cap ribbon (16) applied thereafter. The carcass (10), with ribbons (14/16) applied thereto, is then inserted into an enclosed heated mold (22) and cured to complete the retread.

대표청구항 ▼

The invention claimed is: 1. A method of retreading a pneumatic tire comprising the steps of: providing at least one ready-to-retread tire carcass; applying a base composition layer and a cap composition layer to the carcass; and curing the carcass; wherein the applying step is performed by a syste

The invention claimed is: 1. A method of retreading a pneumatic tire comprising the steps of: providing at least one ready-to-retread tire carcass; applying a base composition layer and a cap composition layer to the carcass; and curing the carcass; wherein the applying step is performed by a system designed to accommodate first and second ready-to-retread carcasses and comprising an extruder station for the base composition layer, an extruder station for the cap composition layer and first and second tire stations; wherein the extrudate from the extruder station for the base composition layer is divided into a first base ribbon and a second base ribbon, wherein the extrudate from the extruder station for the cap composition layer is divided into a first cap ribbon and a second cap ribbon, and wherein the first base ribbon and the first cap ribbon are applied to the first ready-to-retread carcass and the second base ribbon and the second cap ribbon are applied to the second ready-to-retread carcass. 2. The method as set forth in claim 1, wherein the first base ribbon and the first cap ribbon pass through a calender upstream to the first tire station and are simultaneously applied to the first ready-to-retread carcass, wherein the second base ribbon and the second cap ribbon pass through a calender upstream of the second tire station and are simultaneously applied to the second ready-to-retread carcass. 3. The method as set forth in claim 2, wherein the first base ribbon and the first cap ribbon are simultaneously applied to the first ready-to-retread carcass via a winding mechanism. 4. The method as set forth in claim 2, wherein the second base ribbon and the second cap ribbon are simultaneously applied to the second ready-to-retread carcass via a winding mechanism. 5. The method as set forth in claim 1, wherein the step of providing at least one ready-to-retread carcass comprises detreading, contouring, conditioning, and/or treating a previously used pneumatic tire. 6. The method as set forth in claim 5, further comprising the step of applying a cushion gum layer to the at least one ready-to-retread carcass prior to the applying step.