Abstract: Tape or patch material for making joints which have good tensile strength includes a reinforcing array of yarns arranged within a narrow range of angles around the direction of application of probable stress on the joint. The distribution of yarns angles within a small range rather than exactly parallel to each other gives the joint greater splitting resistance with very little loss in strength, and it permits toleration of less precise alignment of tape when the joint is made.The patch material is particularly useful for joining coated abrasives into endless belts. For such joints, it has long been known that better results are achieved if the joint makes an angle other than perpendicular with the edges of the belt.