Plastic conveyor belt with enhanced edge strength for travel on curves

In a plastic conveyor belt capable of following a path including straight and curving sections and including a series of connected and serially interdigited elongated molded plastic belt module rows each including one or more belt modules in the row, the belt module rows being connected by rods extending transversely to the length of the conveyor belt, each belt module row having a set of first aligned spaced projections extending in one direction from the row and a set of second aligned spaced projections extending an opposite direction and arranged generally in staggered relationship with the first projections, the first and second projections of serially adjacent module rows being longitudinally overlapping and juxtaposed when the modules are connected serially in the conveyor belt by the connecting rods extending through transverse openings in the projections, the transverse openings of one of said sets of spaced projections being longitudinally elongated slotted holes to accommodate lateral curves wherein the module rows become angularly shifted and collapse together at the inside of the curve, with substantially the entire longitudinal tension of the belt from module to module carried at the outside of a curve, the improvement comprising,

• at one side of each of a series of belt modules which include first and second spaced projections, integral means including at least the outermost first and second spaced projections for resisting essentially all the longitudinal tension in the belt at the outside of a curve when said one side of the modules is at the outside of a curve, and for increasing the longitudinal tension bearing capability at the outside of the belt on a curve as compared to inner portions of the belt.