Method for producing endless reinforcements for vulcanized pneumatic tires

Claim 1

A method of making a pneumatic tire including the steps of applying an endless reinforcement strip to a tire carcass, applying tread-forming rubber over said strip and carcass, and vulcanizing said tire; said strip comprising continuous cord forming a generally zigzag pattern and being positioned edge to edge across the width of said strip from one side to the other at an angle to the edges of said strip with reversals at the edges, and lengths of said cord between reversals being interleaved with lengths disposed at an opposite angle along at least one line substantially parallel to and intermediate the edges of said strip, the parameters of said strip being wherein C is the circumference of the reinforcement, A is the smaller angle between the cord and the edge of the reinforcement, W is the width of the reinforcement measured perpendicular to the edges, EPI is the number of cords per inch measured perpendicular to the cord lengths, P is an integer and equal to one plus the total number of interleaving lines parallel to and intermediate the edges of the reinforcement, M and D are two integers having no common factor and which render (P . M + OR - 1)/D an integer with D being less than P, and D and P have no common factor, GR is the number of repeating cycles of the cord from one edge and back to the same edge for each circumference of the reinforcement.

Claim 2

A method of making a pneumatic tire including the steps of applying an endless reinforcement strip to a tire carcass, applying tread-forming rubber over said strip and carcass, and vulcanizing said tire; said strip comprising continuous cord forming a generally zigzag pattern and being positioned edge to edge across the width of said strip from one side to the other at an angle to the edges of said strip with reversals at the edges, and lengths of said cord between reversals being interleaved with lengths disposed at an opposite angle along at least one line substantially parallel to and intermediate the edges of said strip, the parameters of said strip being wherein C is the circumference of the reinforcement, A is the smaller angle between the cord and the edge of the reinforcement, W is the width of the reinforcement measured perpendicular to the edges, EPI is the number of cords per inch measured perpendicular to the cord lengths, P is an integer and equal to one plus the total number of interleaving lines parallel to and intermediate the edges of the reinforcement, M and D are two integers having no common factor and which render (P . M + OR - 1)/D an integer with D being less than P, and D and P have no common factor, GR is the number of repeating cycles of the cord from one edge and back to the same edge for each circumference of the reinforcement.