Dispenser having slit valve forming an air tight spout

摘要

A spout valve assembly (18), for a pump dispenser including a discharge head (10), is located within an opening (24) in the discharge head for permitting outletting of liquid product and includes a spout valve (22) retained within the discharge head opening by a retainer (26). The spout valve includes a slit (38) at a first end thereof and an orifice (50) at a second opposite end thereof. The slit includes slit lips (39,41) directly engageable with and disengageable from each other to respectively define slit closed and opened configurations. The spout valve is made of a material for permitting opening of the slit under pressure from the liquid product for thereby allowing the liquid product to be discharged out through the slit when in the slit opened configuration, and for otherwise permitting closing of the slit to prevent the liquid product from being discharged through the slit when in the slit closed configuration.