Machine for bonding together laminated sheets

Claim 1

A MACHINE FOR BONDING TOGETHER LAMINATED SHEETS IN THE FORM OF INDIVIDUAL ASSEMBLIES COMPRISING, IN COMBINATION, (A) A PAIR OF CONTINUOUSLY OPERATED ENDLESS CONVEYOR BELTS ARRANGED ONE ABOVE THE OTHER IN SPACED RELATION TO ACCEPT A CONTINUOUS STREAM OF INDIVIDUAL ASSEMBLIES OF LAMINATED SHEETS BETWEEN THEIR ADJACENT STRETCHES AND CARRY THEM FORWARD THROUGH THE MACHINE, SAID BELTS BEING DIMENSIONED TO CONTACT SAID LAMINATED SHEET ASSEMBLIES THROUGHOUT THE ENTIRE AREA OF THEIR TOP AND BOTTOM SURFACES, (B) A PAIR OF ELONGATED THERMOSTATICALLY CONTROLLED HEATERS FOR EFFECTING THE BONDING OF THE LAMINATED SHEETS OF THE INDIVIDUAL ASSEMBLIES AS THEY ARE CARRIED ALONG BY THE CONVEYOR BELTS, ONE OF SAID HEATERS BEING ARRANGED BELOW THE UPPER STRETCH OF THE LOWER BELT AND PRESENTING A FLAT CONTINUOUS SURFACE IN CONTACT WITH THE LOWER FACE THEREOF, AND THE OTHER OF SAID HEATERS BEING ARRANGED ABOVE THE LOWER STRETCH OF THE UPPER BELT AND PRESENTING A FLAT CONTINUOUS SURFACE IN CONTACT WITH THE UPPER FACE THEREOF, (C) AND BOTH OF SAID BELTS BEING OF UNIFORM THICKNESS AND THUS CAPABLE OF TRANSMITTING SUBSTANTIALLY UNIFORM HEAT AND SUBSTANTIALLY UNIFORM PRESSURE FROM THE HEATERS TO THE LAMINATED SHEET ASSEMBLIES BETWEEN THE BELTS, (D) MEANS FOR VARYING THE TEMPERATURE DEVELOPED BY THE HEATERS ACCORDING TO THE HEAT REQUIREMENTS OF THE LAMINATED SHEET ASSEMBLIES BEING OPERATED UPON, (E) MEANS FOR MOUNTING ONE OF SAID HEATERS FOR RESILIENT MOVEMENT TOWARD AND FROM THE OTHER HEATER TO ACCOMMODATE LAMINATED SHEET ASSEMBLIES OF DIF-