Apparatus for the preparation of walled structures

Claim 1

IN A MATERIAL DEPOSITING HEAD FOR DEPOSITING SYNTHETIC RESINOUS FOAMABLE, HARDENABLE LIQUID IN A PREDETERMINED PATTERN UPON THE SURFACE OF A FOAMED MATERIAL, THE APPARATUS COMPRISING IN COOPERATIVE COMBINATION A FRAME, THE FRAME SUPPORTING A TOP FORMING BELT ASSEMBLY, THE TOP FORMING BELT ASSEMBLY COMPRISING AT LEAST ROTATABLY MOUNTED ROLLS HAVING A DEFORMABLE ENDLESS BELT PASSING ABOUT THE PERIPHERY THEREOF, THE ROLLS ADAPTED TO ROTATE ABOUT GENERALLY PARALLEL AXES, A FIRST SIDE BELT ASSEMBLY COMPRISING AT LEAST A PAIR OF FIRST SIDE BELT ROLLS, THE SIDE BELT ROLLS HAVING A FIRST SIDE FORMING BELT PASSING ABOUT THE PERIPHERY THEREOF, THE FIRST SIDE BELT ROLLS ROTATING ABOUT GENERALLY PARALLEL AXES, A SECOND FORMING SIDE BELT ASSEMBLY COMPRISING AT LEAST A PAIR OF SECOND SIDE BELT FORMING ROLLS, THE SECOND SIDE BELT FORMING ROLLS ROTATING ABOUT A GENERALLY PARALLEL AXES WHICH ARE ALSO PARALLEL TO THE AXES OF THE FIRST SIDE BELT ROLLS, THE FIRST AND SECOND SIDE BELT FORMING ASSEMBLIES EACH HAVING AN UPPER EDGE AND A LOWER EDGE, THE FIRST AND SECOND BELT ASSEMBLIES BEING DISPOSED ON EITHER SIDE OF A FORMING PORTION OF THE TOP FORMING BELT, THE TOP FORMING BELT AND THE SIDE BELTS DEFINING A THREE-SIDED CHANNEL, THE SIDE BELTS ADAPTED TO ENGAGE THE TOP FORMING BELT, THE CHANNEL HAVING A FIRST END AND A SECOND END, A DISPENSER POSITIONED GENERALLY ADJACENT THE FIRST END OF THE CHANNEL AND ADAPTED TO DISPENSE FOAMABLE, HARDENABLE MATERIAL THEREIN, MEANS TO DRIVE THE TOP FORMING BELTS AND THE SIDE BELTS AT A SUBSTANTIALLY EQUAL RATE IN A LIKE DIRECTION IN THE RIDGE FORMING THE CHANNEL.