Power transmission belt and method of making same

摘要

A method of making a belt including the steps of: (a) helically wrapping a fabric strip of predetermined width on a mandrel at a first helix angle; (b) helically winding a tensile cord onto the mandrel over the fabric at a second helix angle less than the first helix angle; (c) wrapping a sheet or a strip of elastomer material around the mandrel over the tensile cord; and (d) curing the elastomer material under pressure to form a belt sleeve. The mandrel may be grooved for making toothed belts. The fabric strip may be preformed. A resulting toothed belt has a fabric seam spanning several teeth and having a helix angle. The seam may be joined.

主权项

1. A toothed endless belt comprising:
an elastomeric belt body with a plurality of teeth defining a toothed surface of said belt; a helically wrapped fabric strip having a width and covering the toothed surface with adjacent edges of the fabric strip overlapping one another one-half the width of said fabric strip and describing a helical seam, with said seam extending over more than two teeth, and wherein said seam defines a first helix angle relative to a side edge of the belt; and a helically wrapped tensile cord embedded in the belt body with the tensile cord describing a second helix angle relative to the side edge of the belt, wherein all the cord centers viewed in a belt cross section are collinear.