Foaming apparatus

Claim 1

AN APPARATUS FOR CONTINUOUS-PRODUCTION OF SHEETS OF ROOFING OR INSULATING MATERIAL, WHICH APPARATUS COMPRISING MEANS FOR FOLDING UPSTANDING EDGES ALONG A FIRST CONTINUOUS SHEET OF BACKING MATERIAL, MEANS FOR INTRODUCING A FOAMABLE LIQUID RESIN MIX ON THE SHEET OF BACKING MATERIAL BETWEEN SAID FOLDED EDGES AT A RECEIVING STATION, HORIZONTALLY DISPOSED AND GENERALLY VERTICALLY ALIGNED AND SPACED ROLLERS, SAID ROLLERS BEING DISPOSED TO RECEIVE THE MIX AND BACKING SHEET AND A SECOND SEPARATE BACKING SHEET DISPOSED THEREOVER FED BETWEEN SAID ROLLERS TO SANDWICH THE MIX BETWEEN THE TWO BACKING SHEETS, MEANS FOR HEATING BOTH BACKING SHEETS AT A TEMPERATURE ABOVE FOAMING TEMPERATURE AND BELOW CURING TEMPERATURE OF THE FORMABLE RESIN, A CURING ZONE MAINTAINED AT CURING TEMPERATURE, SELECTIVELY ADJUSTABLY UNIFORMLY VERTICALLY SPACED OPPOSING MOVABLE CONVEYORS ADAPTED TO VERTICALLY CONFINE SAID SANDWICH TO A PRESELECTED VERTICAL THICKNESS, SAID CONVEYORS ADAPTED TO DIRECT THE SANDWICH THROUGH SAID CURING ZONE FROM ONE END THEREOF TO THE OTHER END THEREOF EACH OF SAID CONVEYORS COMPRISING A CONTINUOUS BELT OF LATERALLY DISPOSED CLOSELY SPACED HINGED PLATES, REMOVABLE AND REPLACEABLE DAM MEANS UPSTANDING THE DISTANCE OF SAID PRESELECTED VERTICAL THICKNESS FROM AND SECURED TO THE SEPARATE PLATES OF THE LOWER CONVEYOR ADJACENT EACH EDGE AND ADAPTED TO SUPPORT SAID UPSTANDING LOWER SHEET EDGES THROUGHOUT SAID CURING ZONE, MEANS FOR COATING SAID DAM MEANS WITH RELEASE AGENT, MEANS FOR ADJUSTING THE VERTICAL SPACING OF SAID CONVEYORS, MEANS FOR ADJUSTING THE SPACING OF SAID ROLLERS, MEANS FOR CONTROLLING THE RATE OF FOAMABLE MIX INTRODUCTION TO PROVIDE A GENERALLY CONSTANT AMOUNT OF LIQUID BEHIND SAID ROLLERS SUFFICIENT TO ASSURE UNIFORM SPREADING OF THE LIQUID, MEANS RECEIVING THE RESULTING CONTINUOUS FOAMED SHEET FROM THE OTHER END OF SAID CURING ZONE, AND MEANS FOR CUTTING THE CURED CONTINUOUS SHEET TO DESIRED LENGTH.

Claim 2

AN APPARATUS FOR CONTINUOUS-PRODUCTION OF SHEETS OF ROOFING OR INSULATING MATERIAL, WHICH APPARATUS COMPRISING MEANS FOR FOLDING UPSTANDING EDGES ALONG A FIRST CONTINUOUS SHEET OF BACKING MATERIAL, MEANS FOR INTRODUCING A FOAMABLE LIQUID RESIN MIX ON THE SHEET OF BACKING MATERIAL BETWEEN SAID FOLDED EDGES AT A RECEIVING STATION, HORIZONTALLY DISPOSED AND GENERALLY VERTICALLY ALIGNED AND SPACED ROLLERS, SAID ROLLERS BEING DISPOSED TO RECEIVE THE MIX AND BACKING SHEET AND A SECOND SEPARATE BACKING SHEET DISPOSED THEREOVER FED BETWEEN SAID ROLLERS TO SANDWICH THE MIX BETWEEN THE TWO BACKING SHEETS, MEANS FOR HEATING BOTH BACKING SHEETS AT A TEMPERATURE ABOVE FOAMING TEMPERATURE AND BELOW CURING TEMPERATURE OF THE FORMABLE RESIN, A CURING ZONE MAINTAINED AT CURING TEMPERATURE, SELECTIVELY ADJUSTABLY UNIFORMLY VERTICALLY SPACED OPPOSING MOVABLE CONVEYORS ADAPTED TO VERTICALLY CONFINE SAID SANDWICH TO A PRESELECTED VERTICAL THICKNESS, SAID CONVEYORS ADAPTED TO DIRECT THE SANDWICH THROUGH SAID CURING ZONE FROM ONE END THEREOF TO THE OTHER END THEREOF EACH OF SAID CONVEYORS COMPRISING A CONTINUOUS BELT OF LATERALLY DISPOSED CLOSELY SPACED HINGED PLATES, REMOVABLE AND REPLACEABLE DAM MEANS UPSTANDING THE DISTANCE OF SAID PRESELECTED VERTICAL THICKNESS FROM AND SECURED TO THE SEPARATE PLATES OF THE LOWER CONVEYOR ADJACENT EACH EDGE AND ADAPTED TO SUPPORT SAID UPSTANDING LOWER SHEET EDGES THROUGHOUT SAID CURING ZONE, MEANS FOR COATING SAID DAM MEANS WITH RELEASE AGENT, MEANS FOR ADJUSTING THE VERTICAL SPACING OF SAID CONVEYORS, MEANS FOR ADJUSTING THE SPACING OF SAID ROLLERS, MEANS FOR CONTROLLING THE RATE OF FOAMABLE MIX INTRODUCTION TO PROVIDE A GENERALLY CONSTANT AMOUNT OF LIQUID BEHIND SAID ROLLERS SUFFICIENT TO ASSURE UNIFORM SPREADING OF THE LIQUID, MEANS RECEIVING THE RESULTING CONTINUOUS FOAMED SHEET FROM THE OTHER END OF SAID CURING ZONE, AND MEANS FOR CUTTING THE CURED CONTINUOUS SHEET TO DESIRED LENGTH.