Receptacles – Closures – Vent in closure
Patent
1988-04-26
1989-11-14
Pollard, Steven M.
Receptacles
Closures
Vent in closure
220855P, 222571, B65D 3700
Patent
active
048801402
ABSTRACT:
A filter-separator pour-out cap for attachment to the neck opening of a container to separate particulate material from a liquidic suspension in the container when the container is tipped to pour out its contents. The cap comprises a filter-separator section having an upstream face at which flow from the container enters and a downstream face at which flow exits. This section comprises successive elements that are spaced axially apart from each other and are constructed and arranged to present at the upstream face juxtaposed uniformally spaced apart edges that define the entrances of openings that pass through the filter-separator from the upstream face to the downstream face. These elements have, in transverse cross section, a taper which narrows in the direction from the upstream face to the downstream face so that the openings are of progressively increasing taper in the same direction. In one embodiment of the invention these elements are identical circular rings. In another, the elements are convolutions of a helix. Various embodiments of caps are disclosed.
REFERENCES:
patent: 2134281 (1938-10-01), Illch
patent: 2704174 (1955-03-01), Uxa
patent: 2733775 (1956-02-01), Dupure
patent: 2743844 (1956-05-01), Livingstone
patent: 3297211 (1967-01-01), Unger
patent: 4533068 (1985-08-01), Meierhoefer
Hillegas William J.
Solomon David E.
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