Package making – Gas filling and/or evacuating of receptacle and closing – Within enclosure
Patent
1977-08-11
1979-05-15
McGehee, Travis S.
Package making
Gas filling and/or evacuating of receptacle and closing
Within enclosure
53510, B65B 3102
Patent
active
041540441
ABSTRACT:
An apparatus for sealing cans with lids under vacuum is provided with a vacuum chamber. The chamber is formed by two parts vertically movable by a lifting device relative to one another so that the chamber is closed when these parts have been moved together and open when these parts have been moved apart. A vacuum bell is mounted on the upper one of the two parts. The lower part has a recess in a surface thereof for receiving a can. A pressure plate movable to a limited extent relative to the upper part and forming part of a sealing device is provided to press a lid onto a can. Only the lower part is movable, the upper part is made fixed. The vacuum bell is movable relative to the fixed, upper part when the vacuum chamber is closed. A lifting device which effects movement of the lower part can be stopped in an intermediate position, in which the vacuum chamber is already closed, but the pressure plate is still in a lower position a short distance from the can. The pressure plate is displaceable by the can into a position against a stop which corresponds to an end position of the lifting device.
REFERENCES:
patent: 2510457 (1950-06-01), Bjering
patent: 3340668 (1967-09-01), Bofinger
patent: 3908334 (1975-09-01), Rychiger
Ludwig Schwerdtel GmbH
McGehee Travis S.
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