B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
B65B 31/04 (2006.01)
Patent
CA 2052841
A gas displacement device and method for substituting inert gas for ambient air in a gable-top paperboard carton prior to closing of an open top of the carton. The device includes a source of inert gas connected to an outlet, a hood for forming a blanket of inert gas in a predetermined volume of space which communicates with the outlet, the hood having an opening which lies in a substantially horizontal plane, and a conveyor for moving cartons in a direction of displacement so that each open top passes under the opening. The outlet to which the inert gas source is connected is formed in a wall of the hood. A stream of inert gas from the outlet is injected into the headspace of the container when the container is in a first position, but not when the container is in a second position and the blanket of inert gas overlies the open top of the container when the container is in the second position.
Evans Donald
Harbison James C.
Lomax Edwin D.
Marano Gerald A.
International Paper Company
R. William Wray & Associates
LandOfFree
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