Method of manufacturing reinforced plastic sheet

Claim 1

A CONTINUOUS PROCESS FOR FORMING A SHEET OF HOMOGENEOUS PLASTIC MATERIAL WITH REINFORCING MESH ENCLOSED THEREIN COMPRISING THE STEPS OF, PASSING A THIN SHEET OF SAID MATERIAL IN SOLID FORM OVER A RESILIENT PRESSURE ROLL AND THROUGH THE NIP BETWEEN SAID ROLL AND A COOPERATING RIGID ROLL URGED THEREAGAINST AT A NIP LINE, PASSING A MESH OF DIMENSIONALLY STABLE STRANDS INTO SAID NIP ON THE SIDE OF SAID SHEET OPPOSITE SAID RESILIENT ROLL AT A FEED RATE APPROXIMATELY THE MOVEMENT OF SAID SHEET, INSERTING BETWEEN SAID NET AND SAID RIGID ROLL A LAMINAR FLOW OF SAID PLASTIC MATERIAL IN FLUID FORM MOVING AT A RATE NOT EXCEEDING SAID FEED RATE AND WITH THE FLOW ORIENTED TO CONTACT SAID RIGID ROL, SAID MESH AND SAID SHEET AHEAD OF SAID LINE, COOLING SAID RIGID ROLL SUFFICIENTLY TO CAUSE CONGEALING OF SAID FLOW OF PLASTIC IMMEDIATELY ADJACENT THERETO WHILE LEAVING UNCONGEALED THE BODY OF SAID FLUID DURING ITS PASSAGE ACROSS SAID LINE OF THE NIP, URGING SAID ROLLS TOGETHER AT SAID NIP SUFFICIENTLY TO WELD SAID PART TO SAID UNCONGEALED MATERIAL, AND STRIPPING SAID SHEET OF REINFORCED PLASTIC FROM SAID RIGID ROLL AFTER THE TEMPERATURE THEREOF HAS DECREASED SUFFICIENTLY TO PROVIDE SELF-SUSTAINING STRENGTH.