ck back units for glue or other liquids either separately installed with or incorporated into no drip suck back liquid applying and control apparatusUS3906122 *Jan 24, 1974Sep 16, 1975Ici LtdMethod for coating metal anodes with electroconductive paintUS3929286 *Jan 29, 1975Dec 30, 1975Nordson CorpApparatus and method for electrostatically spraying highly electrically conductive water-based coating