Method of making a preformed fabric liner which lines a toothed belt construction

In a method of making a preformed fabric means for lining the toothed surface means of a toothed belt construction, said method comprising the step of forming a fabric means so as to have serially disposed tooth-shaped projections substantially throughout the length thereof that accurately correspond to the teeth of said belt construction so as to line the toothed surface means thereof, the improvement comprising the steps of forming said preformed fabric means to comprise an endless tubular sleeve, the step of forming said fabric means to have said tooth-shaped projections comprising the step of disposing said fabric means between a pair of cooperating and telescoped cylindrical mold members respectively having teeth that index with each other to form said tooth-shaped projections of said fabric means, forming one of said mold members by deforming a first sleeve of polymeric material under heat and pressure against a cylindrical mold device that has teeth thereon that are substantially the same size and configuration as the teeth of said belt construction whereby said first sleeve has teeth formed therein, removing said first sleeve from said mold device, inverting said first sleeve, deforming a second sleeve of polymeric material under heat and pressure against said inverted first sleeve to form teeth in said second sleeve that are in indexed relation with said teeth of said first sleeve, inverting said sleeves while said second sleeve is against said first sleeve, and then separating said inverted sleeves whereby said separated sleeves now comprise said cylindrical mold members to be utilized to form said fabric means therebetween.