Abstract: A spline roller having a cylindrical barrel having a length, a first and second end, a centerline, and a circumferential surface, and at least a first drive portion formed integrally into the circumferential surface, having a first end and a second end, at least a first circumferential recess at the first end, and comprising a plurality of the parallel, radially-disposed, splines about the circumference, each spline extending along the length of the barrel from the first circumferential recess. Each spline has a ridge extending from the first end to the second end, and typically has a crown along the length of the ridge. The ridge can be oriented along a line that is parallel to the centerline of the spline roller, to provide a straight spline roller. The ridge can also be oriented along a line that is angled inwardly at a taper angle toward the centerline of the roller, to provide a tapered spline roller.

Abstract: A belt guard for a drive belt on a roller conveyor system, that can be positioned adjacent the drive belt and between adjacent conveyor rollers to guard the side edges of the drive belt from inadvertent or intentional entanglement of a person's fingers or other body parts or clothing in the rotating rollers and drive belts. A guard assembly is provided having a first and second belt guard members affixed together and disposed on opposite sides of the drive belt. The invention also includes a roller conveying system that has a plurality of the spaced-apart cylindrical rollers, driven by a plurality of a circular drive belt, and a nip guard system having a plurality of nip guard means that guard the nips and/or sides of the revolving drive belts.

Abstract: A spline roller having a cylindrical barrel having a length, a first and second end, a centerline, and a circumferential surface, and at least a first drive portion formed integrally into the circumferential surface, having a first end and a second end, at least a first circumferential recess at the first end, and comprising a plurality of the parallel, radially-disposed, splines about the circumference, each spline extending along the length of the barrel from the first circumferential recess. Each spline has a ridge extending from the first end to the second end, and typically has a crown along the length of the ridge. The ridge can be oriented along a line that is parallel to the centerline of the spline roller, to provide a straight spline roller. The ridge can also be oriented along a line that is angled inwardly at a taper angle toward the centerline of the roller, to provide a tapered spline roller.

Abstract: A tapered spline conveyor roller, and a curved conveyor roller assembly using a plurality of the tapered spline rollers. The tapered spline roller has a cylindrical barrel and an inner and an outer drive portion that is formed of a plurality of parallel, radially-disposed, tapered splines about the circumference of the barrel portion. The splines can be tapered inwardly at a taper angle toward the center of the roller, along the length of the spline, from the first end toward the second end of the roller. A belt connects and engages the tapered splines of the drive portions of adjacent rollers, for rotationally coupling the rollers. The connecting belt typically has an inner surface having spaced-apart ribs for engaging the slots disposed between the tapered splines. The tapered splines of the two drive portions of adjacent rollers is provided with a taper angle that is one-half of the angle that is formed between the centerlines of the adjacent rollers.