ApplicationNo. 039658 filed on 03/30/1993
US Classes:222/95, With wall-collapsing means222/105, With casing or support222/212, With flow controllers or closures222/481.5With movable flexible or remotely connected vent pipes
ExaminersPrimary: Kashnikow, Andres
Assistant: Bomberg, Kenneth
Attorney, Agent or Firm
Foreign Patent References
International ClassesB65D 035/28
AbstractA resilient squeeze bottle dispensing package including an internal flexible bag which is suitable for dispensing viscous product such as toothpaste, but which includes an air valve which will automatically permit pressure equilibration in the chamber formed between the flexible bag and the interior of the bottle in response to a decrease in the atmospheric pressure surrounding the package. Employing a valve which permits such automatic pressure equilibration avoids unwanted oozing of viscous product from the discharge orifice of the package when the atmospheric pressure surrounding the package decreases, e.g., as by airplane travel or by travelling from a first elevation to a second substantially higher elevation.