Dispensing – With discharge assistant – Container with follower
Reexamination Certificate
2005-05-31
2005-05-31
Nicolas, Frederick (Department: 3754)
Dispensing
With discharge assistant
Container with follower
C222S386000, C222S326000
Reexamination Certificate
active
06899254
ABSTRACT:
A dispenser includes a container providing a cavity and a discharge opening at one end. A piston in the cavity has a peripheral wall portion sealing against the inner wall of the container and a centrally disposed passage therethrough. A sealing plug of resiliently deformable material is seated in the passage and has a peripheral flange about the front end adjacent the discharge opening. The flange bears upon the surface of the front wall of the piston about the passage to effect a seal therebetween. A filler push rod bears upon the surface of the sealing plug is movable to move the flange of the plug away from the surface of the piston to allow air to vent through the passage about the periphery of the plug.
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Frey Charles M.
Sandholm Albert E.
Nicolas Frederick
Plas-Pak Industries, Inc.
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