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US 4,057,949 AGranted
Bagging methods
AssigneeSociete des Brevets Greffe
InventorMaurice F. Greffe
Life of this patent
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Abstract
An improved method for bagging material, particularly granular material in which the material is first placed into a bag, the bag is closed by bringing the lips of the open end together and folding them over, preferably with a double fold, a discontinuous seal is then made along the closure, the bag is then subjected to atmospheric pressure.
Claims12
A method of bagging material in a bag to reduce the quantity of air trapped in the bag comprising the steps of:
- filling a quantity of material in the bag,
- forming a closure for the previously filled bag by
- a. first bringing the lips of the bag opening together and folding the lips over on themselves to form a fold area and,
- b. then providing a plurality of seals spaced apart along the fold area
- subjecting the bag to a reduced pressure to deaerate it through the closure, and
- subjecting the bag to atmospheric pressure, the said closure forming an obstacle to the intrusion of the outside gases.
3 more elements
Dependencies are inferred from the claim text.