A silk screen printing process and apparatus in which a silk screen having a porous figure printing area may be divided by partitions into compartments for different types or colors of ink. The printing operation is performed by a rapid upward acceleration of the silk screen and sheet on which the printing...http://www.google.fr/patents/US4054091?utm_source=gb-gplus-shareBrevet US4054091 - Silk screen printing process and apparatus
