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Circular tube shaping apparatus










Image Number 2 for United States Patent #4883529.

An apparatus for shaping a tube into circle includes a dummy rod to be engaged to a rear end of the tube for constituting an extention of the tube and a support for supporting the combination of the tube and the dummy rod so that the combination is movable toward the front end of the tube. The support initially supports the tube section of the combination and finally supports the dummy rod section of the combination. A heater is located in front of the support for locally softening the tube. A turning arm is coupled at its free end to the front end of the tube for pulling the tube along a circle around the axis of the other end of the turning arm so that the tube is shaped into a circle defined by the turning movement of the turning arm. A motor moves the combination ahead.








 
 
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