Package making – With contents treating – Vacuum or inert atmosphere
Patent
1990-06-04
1992-06-16
Culver, Horace M.
Package making
With contents treating
Vacuum or inert atmosphere
53 88, 53103, 53390, 13753321, 141 65, 220202, 220366, B65B 3104, B65B 728
Patent
active
051215900
ABSTRACT:
Apparatus for evacuating and sealing containers of perishable food or other substances includes a rigid lid for fitting onto the container and a resilientt valve which is situated over a small passage in the lid. The valve has a hollow interior region which is open at the underside of the member and a stem extends down through the passage in the lid and carries an enlargement at its lower end that is broader than the passage. A hollow cup, coupled to a vacumm pump, is temporarily placed over the valve to draw air from the container after which atmospheric pressure urges the lid against the container and urges the valve against the lid to seal the container. The hollow interior of the valve is broader than the passage in the lid and thus atmospheric pressure is effective against an area of the valve that exceeds the area of the passage thereby assuring a very strong and reliable sealing effect. The construction is simple, economical and compatible with a variety of containers including pre-existing containers that may be found in the home and in restaurants. The lid may be proportioned and adapted for simultaneously evacuating and sealing a plurality of containers such as at restaurant salad bars.
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Culver Horace M.
Zimmerman Harris
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