Tennis racket tensioning procedure alternately tension symmetrically located length and cross wise strings with tension depending on number of contact points

摘要

A tennis racket tensioning procedure alternately simultaneously or successively tensions (Z1, 2) symmetrically located length and cross wise strings with tension depending on the number of contact points. Independent claims are included for equipment using the procedure by providing rotation of the racket in a frame with tension device clamp jaws (1-8).