A tip applicator includes a tip head having a truncated body forming an interior, an applicator end and a receiving end. Further the tip applicator includes a concave applicator surface disposed on the applicator end and having a discharge opening within. The tip head also includes a Venturi structure...http://www.google.es/patents/US20050047848?utm_source=gb-gplus-sharePatente US20050047848 - Tip applicator with Venturi structure
