Tire manufacturing using a roll forming apparatus
AssigneeThe Goodyear Tire & Rubber Company
InventorsMichael Wallace Smith, Michael Raymond Dzurko, Patrick David Marks, William James Head
Life of this patent
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Abstract
A method for applying a plurality of reinforcement belts upon a toroidal tire carcass (50). First and second reinforcement belts (56, 60) are first wrapped around the tire carcass. Then a first belt assembly (68) of a third reinforced belt (69) with elastomeric wedges (72a, 72b) embedded into side edges (70a, 70b) of the third belt is wrapped around the second belt (60) so that the side edges (62a, 62b) of the second belt are spaced from the side edges (70a, 70b) of the third belt. An outer belt (74) and a tread (80) are applied about the third belt, and the tire carcass is ready to be cured in a tire mold.
Claims17
A method for constructing a cord reinforced belt assembly used in the construction of a pneumatic tire, comprising the steps of:
- a) extruding a first wedge of uncured rubber along a first side edge of a cord reinforced belt on a one surface of the belt;
- and
- b) roll forming the first wedge of uncured rubber along the first side edge of the belt to embed the first side edge of the belt in the uncured rubber of the first wedge;
- and to shape the first wedge with a triangular cross-section such that an obtuse vertex is located directly above the first side edge of the belt.
A method of constructing a pneumatic tire comprising the steps of:
- a) wrapping a first reinforcing belt around a tire carcass;
- b) wrapping a second reinforcing belt around the first reinforcing belt such that the second reinforcing belt has cords at a first angle with respect to the equatorial plane of the tire carcass;
- c) constructing a first belt assembly including a third reinforcing belt with side edges having one surface embedded into elastomeric wedges, respectively;
- and
- d) wrapping the first belt assembly around the second reinforcing belt with the elastomeric wedges positioned radially inwardly from the first belt assembly against the second belt to space side edges of the second belt from the side edges, respectively, of the third belt;
- and
- wherein the step (c) of constructing a first belt assembly comprises:
- extruding wedges of uncured rubber along the side edges of the third belt;
- and
- roll forming the wedges and side edges of the third belt to embed each side edge into one of the wedges;
- and to shape each wedge with a triangular cross-section such that al obtuse vertex is located directly above one of the side edges.
Dependencies are inferred from the claim text.