Packaging apparatus for making gas-filled packages from...

Details Packaging apparatus for making gas-filled packages from... Packaging apparatus for making gas-filled packages from...

B - Operations, Transporting

65

B

156/7.5

B65B 31/02 (2006.01)

Patent

CA 1153953

IMPROVED PACKAGING APPARATUS FOR MAKING GAS-FILLED PACKAGES FROM PLASTIC FILM ABSTRACT A packaging machine wherein product-loaded cup-shaped receptacles are advanced with an indexing movement through a series of packaging stations. One station includes a fixed vacuum/gas chamber extending entirely over one set of recepta- cles. The receptacles are first evacuated through this fixed chamber, and thereafter gas is directed into the chamber to fill the receptacles. A fine wire-mesh screen is positioned between the chamber and the receptacles to constrain the air and gas flow to a vertical direction, to prevent disarrangement of the product during evacuation and gassing. A gas-curtain structure develops an enclosed region of gas above the receptacles during their movement out from under the fixed chamber over to the final sealing station. The sealing operation takes place in two succes- sive steps within the sealing station. -1-

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