B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
220/10, 93/62
B65D 30/16 (2006.01) B31B 3/00 (2006.01) B65D 30/18 (2006.01)
Patent
CA 1153342
ABSTRACT OF THE DISCLOSURE A method of producing a synthetic foil flat-bottom bag capable of receiving liquid, fluid or pourable material and capable of standing up-right when filled, in which a bag closed at the bottom and open at the top is spread apart at opposite sides whereby at its bottom, a bottom surface with two outwardly pointed triangular tips is formed. The two tips are compressed flat with their two-coil walls and are folded downwardly by approximately 180° about a fold line laterally spaced from the bottom of the bag, while the tip ends are placed against the underside of the bottom wall. Thereafter the two tip folds are crease-welded. The thus produced bag has a supporting surface which is enlarged by the welded multi-layer folds and is stabilized, and tightly sealed by the crease welds in the area of the tip. The fold- ing of the tip is preferably effected by means of a form plate which has two parallel form edges extending beyond the bottom surface of the bag. Upon folding and prior to crease welding of the tips the form plate is removed.
372234
Jentsch Hans G.
Swabey Ogilvy Renault
LandOfFree
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