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US 4,840,609 AGranted
Bag folding machine
AssigneeGlopak Inc.
InventorsElwyn D. Jones, Robert Lauzon, Bruno Wetter
Life of this patent
Estimating the term…
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AssigneeGlopak Inc.
InventorsElwyn D. Jones, Robert Lauzon, Bruno Wetter
Estimating the term…
A method and a machine for folding bags comprising a first conveyor for positioning a flat bag over a first support surface. A pair of sealer bars holds the bag stationary over the first support surface in predetermined alignment with a first folding device. The first folding device effects a first fold to the flat bag and a second conveyor positions the folded bag on a second stationary support surface. A second folding device effects a second fold to the folded bag, and a third conveyor positions the twice folded bag onto a third stationary support surface. A third folding device is provided for imparting a third fold to the twice folded bag, and it includes an orientation support frame to position the bag for transferring same to a collector trough. A predetermined quantity of bags are collected in the collector trough, and identified for transfer into a container.
A bag folding machine comprising first conveying means for positioning a flat bag over a first support surface, holding means to hold said flat bag stationary over said first support surface in predetermined alignment with a first folding means, said first folding means effecting a first fold to said flat bag, second conveying means for positioning said folded bag on a second stationary support surface, second folding means for effecting a second fold to said folded bag, and third conveying means for positioning said twice folded bag onto a third stationary support surface, third folding means for imparting a third fold to said twice folded bag and including a bag support frame having spaced apart upper and lower bag engaging members for retaining an upper and a lower edge portion of said bag after being folded a third time and with said bag oriented substantially vertically, drive coupling means to move said bag support frame to a discharge position, and discharge means to push said bag out of engagement by said bag engaging members to transfer same to a collector means.
A method of folding a plastic bag comprising the steps of:
Dependencies are inferred from the claim text.