Symmetrical structure can also install two bundles of paper at the same time，Paper can be used for non-stop for a job；Adopts mechanical drive to complete the paper clamping, lifting, loosen, move on, around translational motion, etc.  Manual disc brake, the lower limit screw, gear clamp head. The main frame is 14 channel steel welded with 20mm cold drawn round steel, and the length of ground rail is 4000mm.The main frame is 14 channel steel welded with 20mm cold drawn round steel, and the length of ground rail is 4000mm.