Abstract: A process for the manufacture of magnetic field generators including the steps of: marking at least one tile made of conventional material with an identification code; cutting each marked tile into n strips having two dimensions and A--A axis orientation same as the initial tile; rotating the strips 90.degree. to obtain rotated strips having a second A--A axis orientation; selecting and rearranging the rotated strips to obtain the desired characteristics of symmetry and compensation of the magnetic characteristic variations of the input tiles; assembling the rotated strips to form a new tile with different A--A axis orientation; cutting the assembled tiles into portions or sections of predetermined geometric shape; magnetizing the sections; assembling a set of these sections into magnet forming elements; tuning the magnet forming elements; assembling the elements to obtain finished magnets; and tuning the finished magnets.

Abstract: A machine for silk-screen printing, in particular for multi-color printing, comprises a plurality of support tables for supporting an article to be printed, which are intermittently sliding and can be positioned in correspondence to fixed stations; the machine comprises furthermore a plurality of printing heads which can be associated with the framework of the machine in such a way as to be interchangeable at any one of the fixed stations.