Wrapper

Abstract

A wrapper comprises a shaft, a swing arm installed at the shaft and swung around the shaft as a turning center, a recess set on one side of a free end of the swing arm, at least two supporting rollers provided at both sides of an end of the recess, another shaft provided on the outer side of the supporting roller under the recess, a buckling arm with one end rotationally connected with the other shaft and the other end provided with a third roller, and an annular belt circling around the three supporting rollers. The wrapper of the present invention makes the belt coat and press over a winding drum and a metal band by rotating the swing arm, so as to wind the metal band around the winding drum when said winding drum is circumgyrating. The wrapper of the present invention is simple in construction, easy to use and cheap (inexpensive).

1 . A wrapper, comprising: a shaft, a swing arm installed at said shaft and swung around said shaft as a turning center, a recess set on one side of the free end of said swing arm, at least two supporting rollers positioned at both sides of the end of said recess, another shaft positioned on the outer side of the supporting roller under the recess, a buckling arm with one end rotationally connected with said another shaft and the other end provided with a third roller, and an annular belt circling around said three rollers. 
   
   
       2 . The wrapper according to  claim 1 , wherein said swing arm is fixedly connected with said shaft and swung along with said shaft's turning. 
   
   
       3 . The wrapper according to  claim 1 , wherein said swing arm is pin-connected with said shaft and swung by the driving of a drive device. 
   
   
       4 . The wrapper according to  claim 1 , wherein a slideway is set lengthways along said swing arm, and the supporting roller on the upper side of the recess is set gliding in said slideway by the traction of an end of a cord, the other end of which is connected with a rotor set on said shaft. 
   
   
       5 . The wrapper according to  claim 1 , wherein a slideway is set lengthways along said swing arm, and the supporting roller on the upper side of the recess is set gliding in said slideway by the traction of a liquid control device. 
   
   
       6 . The wrapper according to  claim 4 , wherein one more support roller is fixedly set on the end, facing to the recess, of the slideway, and said annular belt circles around said four supporting rollers. 
   
   
       7 . The wrapper according to  claim 6 , wherein at least one more supporting roller is set along the recess between the two inside supporting rollers, and said annular belt circles around said all supporting rollers. 
   
   
       8 . The wrapper according to  claim 1 , wherein the inner surface of said buckling arm is an arc surface. 
   
   
       9 . The wrapper according to  claim 8 , wherein said arc surface is a round arc surface. 
   
   
       10 . The wrapper according to  claim 1 , wherein said recess is a round arc recess. 
   
   
       11 . The wrapper according to  claim 9 , wherein said recess is a round arc recess. 
   
   
       12 . The wrapper according to  claim 4 , wherein one more support roller is fixedly set on the end, facing to the recess, of the slideway, and said annular belt circles around said four supporting rollers. 
   
   
       13 . The wrapper according to  claim 12 , wherein at least one more supporting roller is set along the recess between the two inside supporting rollers, and said annular belt circles around said four supporting rollers.