Pump dispenser

Details Pump dispenser Pump dispenser

B - Operations, Transporting

65

D

222/76

B65D 83/00 (2006.01) B05B 11/00 (2006.01)

Patent

CA 1303569

ABSTRACT A dispenser of the type having an elongated reservoir for storing toothpaste or other fluent material, an outlet nozzle at one end of the re- servoir, and a one-way piston at the other end of the reservoir in contact with the fluent material, the one-way piston comprising a body portion having a top surface for contacting material in the reservoir, a flexible annular sealing member for sealingly engaging the inner wall of the re- servoir, and one or more air-venting passages for permitting air trapped between the fluent material in the reservoir and the piston to be vented to the atmosphere as the piston is inserted into the dispenser and into contact with the material.

543464

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