Patent ID: 6240709
Filing Date: 2001-06-05
Classification: B31B,B65B,B65D

Abstract:
A method of stacking flowable material in bags comprising:a) providing collapsible bags each including a main body having an interior wall attached at spaced locations to inside surfaces of the msin body, thereby defining a plurality of vertical compartments, a closed bottom portion having substantially planar base, a top portion extending from the main body at an end opposite said bottom portion, and a vent in the top portion;b) filling the vertical compartments of one of the collapsible bags with sufficient flowable material to provide columnar support for holding the bag upright, thereby defining a fill line;c) sealing the top portion along a top seal, so that an interior space is provided within the filled bag between said top seal and said fill line;d) compressing the top portion after sealing the top portion of the filled bag to vent said interior space through the vent and form a substantially planar top surface along said fill line; ande) stacking another of the collapsible bags, filled by repeating steps b) through d), on the top surface of the filled and vented bag.