Package making – Methods – With contents treating
Patent
1977-11-14
1979-05-15
McGehee, Travis S.
Package making
Methods
With contents treating
53436, 53510, 53527, B65B 3102, B65B 124
Patent
active
041540450
ABSTRACT:
In a method for packing of powder formed goods in a container which is hermetically sealable under vacuum, a container blank is formed into an open topped container and a predetermined amount of powder formed product is deposited into the container. The product is slightly compacted by a piston which moves relatively slowly down into the container and presses the product at a relatively low pressure, the piston being then removed. In a second step, the product is compressed by a piston at a relatively high pressure so that the surface of the product is compressed to a level which is below the intended final level of the container. Thereafter the product is subjected to a relatively slight compression by means of a piston which, with a relatively low pressure, is pressed onto the surface of the product. In this third compression step, the relatively low pressure may be followed by a momentary thrust of the piston at a higher pressure. Thereafter the container and the compressed product are subjected to vacuum, and the container is sealed hermetically under vacuum.
REFERENCES:
patent: 2046366 (1936-07-01), Collins
patent: 3748819 (1973-07-01), Christensson
Esseltepac Aktiebolag
McGehee Travis S.
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