Package making – Methods – With contents treating
Patent
1985-11-14
1987-05-05
Sipos, John
Package making
Methods
With contents treating
53511, B65B 3104
Patent
active
046621555
ABSTRACT:
A method and apparatus for forming capsules having a fill material which might be adversely affected by the presence of air. A capsule forming material, which forms a portion of the casing of the capsules, is fed along a predetermined path of movement past a sealing station for sealing of the cavities. A fill material is deposited in the cavities of the capsule forming material prior to cavities being sealed at the sealing station. An evacuation member having an evacuation surface is disposed to face the cavities in the capsule forming material and seal against the capsule forming material as the capsule forming material is moved past the evacuation member to form a substantially airtight seal between the evacuation member and the capsule forming material. The evacuation member includes first and second flow communication conduits communicating with the evacuation surface, the first flow communication conduit communicating with a source of vacuum for withdrawing air from between the surface of the capsule forming material and the evacuation surface and the second flow communication conduit communicating with a source of inert gas for introducing inert gas between the surface of the capsule forming material and the evacuation surface. The first and second flow communication conduits communicate with the evacuation surface at spaced-apart locations so as to provide a continuous sweeping of air from the cavities and replacement thereof with an inert gas.
REFERENCES:
patent: 2431141 (1947-11-01), Scherer
patent: 2840961 (1958-07-01), Karpowicz
patent: 3245197 (1966-04-01), Van Mil
patent: 3269088 (1966-08-01), Kath
patent: 3557517 (1971-01-01), Limmer
patent: 3626655 (1971-12-01), Eltel
patent: 4162599 (1979-07-01), Kyle
patent: 4366663 (1983-01-01), Grebe
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