US Patent 7980968 Stringing device of a racket stringing machine

A stringing device of a racket stringing machine includes a shell whose internal surrounding surface is defined with a track extending along a straight line; a sliding base accommodated in the track of the shell, with wheels on its opposite sides to roll on the surrounding surface of the track; a stringing head fixed on the sliding base by its bottom end; a transmission mechanism connected to the sliding base to drive the sliding base to slide along the track, concurrently driving the stringing head on the sliding base to move along a straight line.