Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Patent
1988-11-10
1990-04-10
Meislin, D. S.
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
493248, 493381, 493386, 156201, 156204, B31B 3902, B31B 3926
Patent
active
049156799
ABSTRACT:
In a method of manufacturing a pleated multi-layer bag, a tubular synthetic resinous film collapsed flatly, with each side edge of the film folded inwardly to form a pair of pleats extending along the side edge, is laid upon a length of an outer-layer bag material. The film and the bag material are transported while one of the pair of pleats at each side edge of the film is set upright to form an upstanding section. Subsequently, opposite side portions of the outer-layer bag material are folded back toward the tubular synthetic resinous film. The upstanding section is folded down toward the other pleat. A part of each of the opposite side portions is forced into a space between the upstanding section and the other pleat at a corresponding one of the opposite side edges of the tubular synthetic resinous film. The opposite side portions of the outer-layer bag material are folded over the tubular synthetic resinous film in such a manner that the opposite side portions extend along the outer surface of the film. The resinous film and outer-layer bag material are then united and selected lengths thereof cut and sealed at one end to form bags. The method maintains the tubular synthetic resinous film in its collapsed state through the various steps, thereby avoiding entry of dirt, germs or bacterial into the bag as it is being manufactured.
REFERENCES:
patent: 3183797 (1965-05-01), Boone
Lavinder Jack W.
Meislin D. S.
Newlong Machine Works, Ltd.
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