Pneumatic tire and tire carcass, some having directional others having non-directional operational characteristics

A directional type pneumatic tire comprising

• a tire carcass having beads and a crown area and a tire tread on the tire carcass and wherein said carcass includes a plurality of confluent ply assemblies and said carcass is comprised of a like number of said confluent ply assemblies which are inclined in opposite rotary (or circumferential) directions of the tire and all cords in said confluent ply assemblies are positioned at a specific bias angle to a radial line at the center of the crown area of the carcass, all of said cords being positioned at a uniform bias angle and wherein the cords in the confluent ply assemblies which are inclined in one rotary direction have lesser strength than the cords in the confluent ply assemblies that are inclined in the opposite rotary direction.

A non-directional type pneumatic tire, one having a cord carcass that produces equal tire service performance in either direction and comprising

• a carcass having beads and a tread on the tire carcass and wherein said carcass includes a plurality of confluent ply assemblies including cords and said carcass is comprised of an even number of confluent ply assemblies and like numbers of said confluent ply assemblies are positioned in opposite rotary directions of the tire and bias angles of the cords are equal.

A non-directional type pneumatic tire, one that produces equal tire service performance in either direction of rotation of the tire as in claim 6 and wherein high rigidity belt ply materials are positioned on top of and/or between the confluent ply assemblies.

A directional type pneumatic tire, having a preferred direction of rotation comprising

• a tire carcass having beads and a tread on the carcass and wherein said carcass is comprised of at least three confluent ply assemblies including cords and wherein a majority number of said confluent ply assemblies are inclined in one rotary direction of the tire leaving the minority number inclined in the other or opposite rotary direction of the tire and bias angles of all the cords are equal.