Continuously operating vertical bag forming filling and...

Details Continuously operating vertical bag forming filling and... Continuously operating vertical bag forming filling and...

2004-09-21

2008-11-11

Gerrity, Stephen F (Department: 3721)

Package making

Progressively seamed cover web or web folds

With closing of web between package units

C053S371600, C053S374600

Reexamination Certificate

active

07448188

ABSTRACT:
A machine for forming a bag of a strip of weldable material, filling the bag with a fluent filling, and sealing the filled bag forms the strip into a longitudinally extending and laterally closed tube and continuously advances the tube longitudinally downward through a welding/folding station while pouring the filling into the tube above the station. A cross-seam welder and a folder at the station are both horizontally closable on opposite sides of the tube to form therein folds and a bag-forming crosswise weld. A vertically shiftable lifter is engageable under a filled section of the tube below the station. Simultaneously the welder and folder are closed on the tube to form a crosswise weld and to fold the tube horizontally inward while the filled section is raised and the welder and folder are moved downward generally synchronously while in contact with the downwardly moving tube.

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