Dispensing – With discharge assistant – Container with follower
Patent
1978-05-10
1979-12-18
Marmor, Charles A.
Dispensing
With discharge assistant
Container with follower
206384, B67D 542, G01F 1104
Patent
active
041790502
ABSTRACT:
A fluid dispensing piston for a cylindrical dispensing tube has a recessed transverse end wall formed with at least one aperture. The aperture is normally covered by a fluid seal removably retained on the exterior surface of the end wall. The piston is placed in a cylindrical dispensing tube with the exterior of the end wall pressing against the fluid in the tube and the piston is moved axially down the tube to dispense the fluid. Further fluid may then be added to the tube and a second piston moved axially down the tube to dispense that fluid, the conformable material covering the aperture in the end wall of the first piston being forced away from the end wall to uncover the apertures as the second piston is moved down the tube to create a pathway for the fluid through the first piston.
REFERENCES:
patent: 2815151 (1957-12-01), Collins
patent: 3076456 (1963-02-01), Hunt, Sr.
patent: 3315847 (1967-04-01), Trumbull
patent: 3659749 (1972-05-01), Schwartz
Farrell, III Francis M.
Otto Robert B.
Seim William J.
Alexander Cruzan
Marmor Charles A.
Minnesota Mining and Manufacturing Company
Qualey Terryl K.
Sell Donald M.
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