Apparatus for forming gusset pleats in tubular bags
AssigneeSIG Schweizerische Industrie-Gesellschaft
InventorsBruno Winzeler, Roland Watzka
Life of this patent
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Abstract
In a continuously operating packaging machine for packaging items at uniform intervals in a tube of sealable packaging material, the narrow sides of the tube are folded inwardly in the region between successive items, where a transverse seam is subsequently formed, by blowing a jet of gaseous medium against the center line of each narrow side, from two nozzles, in each such region.
Claims10
Apparatus for forming gusset pleats in tubular packages on a continuously operating packaging machine in which items to be packaged are spaced at uniform intervals within a generally rectangular tube of sealable packaging material, and two oppositely disposed narrow sides of the tube are folded inwardly prior to a transverse seam being formed in the tube between every two items, said apparatus comprising:
- two nozzles positioned for directing two jets of a gaseous medium toward the oppositely disposed narrow sides of said tube for folding the narrow sidies inwardly;
- means connected to supply a gaseous medium under pressure to said nozzles;
- and means supporting said nozzles for movement in a manner to press said nozzles against the narrow sides of the packaging tube during each operating cycle so that said nozzles mechanically produce indentations therein which initiate the forming of the folds by the jets of gaseous medium.
Dependencies are inferred from the claim text.