Ultrasonic sealing system

Claim 1

AN ULTRASONIC SEALING DEVICE FOR THE THERMOPLASTIC SHEET MATERIALS COMPRISING A HOUSING, A VERTICAL DRIVING MEMBER WITHIN THE HOUSING, COILS ENCIRCLING SAID MEMBER, A SOURCE OF HIGH FREQUENCY ALTERNATING CURRENT ENERGY APPLIED TO THE COILS, A DEPENDING INVERTED CONICAL TOOL HAVING A SMALL CONSTRICTED APPLICATION AREA AT THE LOWER END THEREOF, AN ANVIL AGAINST WHICH SAID AREA PRESSES SAID SHEET MATERIALS, SAID DRIVING MEMBER CONSISTING OF A LAMINATED NICKEL STACK STRUCTURE PROVIDED WITH A PLURALITY OF PARALLEL ENCIRCLING ENERGIZING COILS, AN INTERMEDIATE TUBULAR MEMBER ENCIRCLING SAID DRIVING MEMBER BETWEEN SAID DRIVING MEMBER AND SAID HOUSING TO SUPPLY COOLING AIR THERETO, A VERTICAL STANDARD AT ONE SIDE OF SAID ANVIL AND A COUNTER BALANCED PARALLELOGRAM SUSPENSION BETWEEN SAID STANDARD AND SAID HOUSING AND AN ADJUSTABLE VERTICALLY POSITIONED COIL SPRING COUNTERBALANCING MEANS TO HOLD UP SAID DRIVING MEMBER AND SAID TOOL SO THAT ONLY THE ENERGY OF THE ULTRASONIC VIBRATION OF THE TOOL WILL BE APPLIED TO THE PLASTIC SHEET MATERIALS WITHOUT EFFECT OF THE WEIGHT OF THE DRIVING MEMBER.