Flexible bags – Wall details – Specified seam structure
Patent
1993-06-01
1994-10-25
Shoap, Allan N.
Flexible bags
Wall details
Specified seam structure
383 24, 383120, 383907, B65D 3010
Patent
active
053583353
ABSTRACT:
A reinforced collapsible bag and method of making it from a tubular blank of a flexible material which when filled has two pair of opposed sidewall panels and an inturned shoulder bordering the top of the sidewalls for supporting another bag stacked vertically thereon in a stable manner. The blank is constructed by collapsing it into a generally flat unit having a pair of overlying panels with a pair of folded gusset panels received therebetween, overlapping and securing together adjacent upper corners of adjacent panels, and inverting and expanding the blank to form a blank having two pairs of opposed sidewalls and an inturned shoulder bordering the top of the sidewalls. When expanded, the bag has a bottom wall which extends inwardly from the bottom edge of the sidewalls. A top wall having an inlet opening is attached to the upper shoulder and is of a generally frustoconical shape to ensure more even and complete filling of the bag. Preferably, to facilitate filling, the bag has an inlet spout encompassing the inlet opening that is attached to the top wall.
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Custom Packaging Systems, Inc.
Pascua Jes F.
Shoap Allan N.
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