An anti-drool mechanism suitable for use in an injection molding system is provided herein. An injection molding machine includes a retractable machine nozzle for injecting a melt stream into a manifold. Between the machine nozzle and the manifold is an anti-drool mechanism, which includes a melt passage...http://www.google.es/patents/US7416402?utm_source=gb-gplus-sharePatente US7416402 - Sprue bushing anti-drool device
