Process for forming dust control mat with non-cleated borders

A method of forming a unitary dust control mat having a pile fiber upper surface and a rubber-like backing extending beyond at least two edges of the pile fiber upper surface comprising the steps of:

• placing a perforated silicone-like rubber material having a width less than that of the desired dust control mat on the surface of a conveyor belt, placing a strip of rubber-like material on top of the perforated silicone-like pad so that its longitudinal edges overlap the edges of the silicone-like material, placing a layer of pile fabric on top of the rubber-like material to form a form a layered structure, indexing the layered structure into a heated press molding machine, applying pressure to the layered structure in the press molding machine to vulcanize the rubber-like material and cause the rubber-like material to pass through the perforations in the silicone-like material to form cleats, causing the longitudinal edges of the rubber-like material to bend over the edges of the silicone-like material to form uncleated portions of a thickness greater than that of the body of the rubber-like material, indexing the vulcanized and adhered layered structure to a stripping station outside the press molding machine and stripping the composite structure from the conveyor belt and the silicone-like material.