Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Patent
1989-04-05
1991-05-07
Schmidt, Frederick R.
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
221 27, 221 47, 383109, 493201, B31B 100
Patent
active
050132903
ABSTRACT:
A method for producing a serialized bundle of thermoplastic T-shirt grocery bags which serially open upon being dispensed. Specifically, a bag being removed from the serialized bundle of thermoplastic T-shirt grocery bags mounted on a dispensing rack automatically opens an immediately following and trailing bag. The bags of the serialized bundle are coextruded to have at least two layers, an inside layer having a low coefficient of friction and an outside layer having a high coefficient of friction. A relatively low coefficient of friction between two inside layers allows each bag to easily open; a relatively high coefficient of friction between the outside layers allows a leading bag to entrain a trailing bag. Entraining structures are provided into and between the respective bags which permit the bags to be keyed together at their high friction outside layers and separate at their low friction inside layers. These entraining structures may preferably include special flaps which overlie one another on a dispensing rod. A tab constraining each front wall to a wicket is either pre-severed or slit during the cut out operation to easily detach from the wicket so as to not overcome a self opening force which prevents the bags from opening automatically.
REFERENCES:
patent: 3184055 (1965-05-01), Davis et al.
patent: 4560598 (1985-12-01), Cowan
patent: 4676378 (1987-06-01), Baxley et al.
patent: 4744200 (1988-05-01), Benoit, Jr. et al.
patent: 4811417 (1989-03-01), Prince et al.
Cupples Paper Bag Company
Lavinder Jack
Schmidt Frederick R.
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