Abstract 863,166. Seaming. RUHRCHEMIE A.G. Sept. 13, 1957 [Sept. 22, 1956], No. 28923/57. Class 42 (1). [Also,in Group XXVIII] Parts, of thermoplastic material, are welded together by frictional heat produced at the surfaces to be joined, the heat being produced by an oscillatory motion of at least one of the parts, the latter being held together under pressure. As shown, the ends of pipes 1, 2 of polyvinyl chloride, polyamide, polyurethane, polystyrene or polyethylene are held in abutment by clips 4, 5, the clip 4 being connected by springs 7 to a ring 6 clamped on to the pipe 2 and attached to an arm 9 moved by a crank 10 on the shaft of an electric or pneumatic motor, internal-combustion engine or a manually or mechanically-energized accumulator.
IN THE PROCESS FOR WELDING TOGETHER PIPE SECTIONS OF THERMOPLASTIC MATERIALS BY MEANS OF FRICTIONAL HEAT, PRODUCED AT THE SURFACES TO BE JOINED TOGETHER BY OSCILLATORY MOTION, THE IMPROVEMENT WHICH COMPRISES MAINTAINING THE CORRESPONDING END PORTIONS OF THE PIPE SECTIONS TO BE JOINED IN AXIAL ALIGNMENT AND FRICTIONAL CONTACT, STATIONARILY SECURING THE END PORTION OF ONE OF SAID PIPE SECTIONS, MOUNTING THE END PORTION OF THE OTHER OF SAID PIPE SECTIONS FOR OSCILLATORY MOTION WITH RESPECT TO THE REMAINING PORTION AGAINST MOVEMENT, AND CURING SAID REMAINING PORTION AGAINST MOVEMENT, AND PRODUCING AT LEAST THAT AMOUNT OF FRICTIONAL HEAT REQUIRED TO EFFECT THE WELDING TOGETHER OF THE PIPE SECTIONS BY OSCILLATING THE PIPE SECTION END PORTION MOUNTED FOR OSCILLATORY MOTION WITH A ROTARY OSCILLATORY MOTION IN FRICTIONAL CONTACT WITH THE STATIONARILY SECURED PIPE SECTION END PORTION.
Claim 2
Dependent Claim
135 words
IN THE PROCESS FOR WELDING TOGETHER PIPE SECTIONS OF THERMOPLASTIC MATERIALS BY MEANS OF FRICTIONAL HEAT, PRODUCED AT THE SURFACES TO BE JOINED TOGETHER BY OSCILLATORY MOTION, THE IMPROVEMENT WHICH COMPRISES MAINTAINING THE CORRESPONDING END PORTIONS OF THE PIPE SECTIONS TO BE JOINED IN AXIAL ALIGNMENT AND FRICTIONAL CONTACT, STATIONARILY SECURING THE END PORTION OF ONE OF SAID PIPE SECTIONS, MOUNTING THE END PORTION OF THE OTHER OF SAID PIPE SECTIONS FOR OSCILLATORY MOTION WITH RESPECT TO THE REMAINING PORTION AGAINST MOVEMENT, AND CURING SAID REMAINING PORTION AGAINST MOVEMENT, AND PRODUCING AT LEAST THAT AMOUNT OF FRICTIONAL HEAT REQUIRED TO EFFECT THE WELDING TOGETHER OF THE PIPE SECTIONS BY OSCILLATING THE PIPE SECTION END PORTION MOUNTED FOR OSCILLATORY MOTION WITH A ROTARY OSCILLATORY MOTION IN FRICTIONAL CONTACT WITH THE STATIONARILY SECURED PIPE SECTION END PORTION.