Patent ID: 6945892

Claim:
A power transmission belt comprising a rubber body formed of cross-linkable natural or synthetic rubber processable in solid form, a strain-resisting tensile member embedded in the body, an overcord section terminating in a generally flat exterior belt back surface, and an undercord section, the improvement comprising a tubular radially stretchable textile material positioned at the exterior belt back surface and a rubber layer formed of cross-linkable natural or synthetic rubber processable in solid form adhered to the tubular textile material on its under-surface and interposed between the tubular textile material and the strain-resisting tensile member, said tubular radially stretchable textile material together with the belt back surface being so configured that the belt back surface is free of laps, bumps or other discontinuities of such magnitude whereby, upon running of the belt and impingement of such back surface against a pulley or tensioner, noise generation is minimized.