Belt for use in forming a core for manufacturing an elastomeric tire

Abstract

A belt for incorporation into a core of plies and beads formed on a tire core build mandrel where the core is for encapsulating in an elastomeric material, preferably a polyurethane, in a tire formation process, and which belt is formed from like belt sections laid over one another where the one belt section is rotated one hundred eighty degrees around its longitudinal axis with respect to the other, and the belt sections are individually fitted around a tire core crown and the pair of belt sections ends are off-set from one another and are fitted together into a continuous belt. The belt is a weave of Rayon warp and cotton fill cords or filaments with the Rayon warp cords or filaments having a crossing angle of forty-eight to fifty-two degrees and the Rayon warp and cotton cords or filaments, respectively, have selected diameters, to provide for a separation of the Rayon cords or filaments respectively, in a stack of belt sections.

1 . A belt for use in a formation of a tire core that also includes plies and beads where the core is for installation in a mold for forming a polyurethane tire comprising, a pair of identical belt sections for positioning over one another after one belt section has been turned one hundred eighty degrees about a longitudinal axis with respect to the other, and each said belt section is a weave of Rayon warp cords or filaments and cotton fill cords or filaments, where said Rayon warp cords or filaments are essentially parallel and form an angle of from twenty-four to twenty-six degrees to parallel sides of said belt section, and which said belt section has a width to extend across a top or crown surface of a tire core build mandrel, a length to extend around said tire core build mandrel, and with said belt section ends for fitting together. 
   
   
       2 . The belt for use in a formation of a tire core as recited in  claim 1 , wherein the belt section ends of each of the two belt sections are positioned on opposite sides of a tire core mandrel top surface whereon the core is being formed. 
   
   
       3 . The belt for use in a formation of a tire core as recited in  claim 1 , wherein the stack of belt sections Rayon warp cords or filaments have crossing angles of from forty eight (48) to fifty two (52) degrees to one another. 
   
   
       4 . The belt for use in a formation of a tire core as recited in  claim 1  wherein the belt sections are formed from a woven section of material that is cut at spaced intervals and at an angle of from twenty-four (24) to twenty-six (26) degrees to parallel sides of said woven section of material. 
   
   
       5 . The belt for use in a formation of a tire core as recited in  claim 4 , wherein the diameter of the Rayon warp cords or filaments used for weaving the section of material is between point zero two five inches and point zero three five inches. 
   
   
       6 . The belt for use in a formation of a tire core as recited in  claim 4 , wherein the diameter of the cotton fill cords or filaments for use in weaving the section of material is between point zero zero eight and point zero two zero inches. 
   
   
       7 . The belt for use in a formation of a tire core as recited in  claim 1 , wherein the weave density of the belt sections is from ten to eighteen filaments per inch of the Rayon warp cords or filaments and from four to fourteen filaments per inch of the cotton fill cords or filaments. 
   
   
       8 . The belt for use in a formation of a tire core as recited in  claim 1 , wherein the belt section ends are maintained together by an application of a thin section of cotton material, spanning the belt section ends junctions. 
   
   
       9 . The belt for use in a formation of a tire core as recited in  claim 1 , further including, a layer of an polyurethane compatible adhesive applied along the opposite belt sides. 
   
   
       10 . The belt for use in a formation of a tire core as recited in  claim 9 , wherein the adhesive is starch based.