A tandem press system for the high speed manufacture of rotor cores and stator cores of electric motors. The tandem press system includes a rotor press and a stator press arranged in series for stamping out laminations from a web of stock material and pre-assembling them into rotor cores and stator cores,...http://www.google.de/patents/US5915750?utm_source=gb-gplus-sharePatent US5915750 - Method of manufacturing stator and rotor cores
