ES15386U - Multiple-walled paper sack. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

A multi-walled paper bag having a tubular body portion normally flattened with an inwardly bent corner to form a valve within a multi-fold valve flap bent at the center to form the normally lower edge of said flap, being held the upper edges of the bag relative to one another in closed relation by a sewn seam extending along it, the seam also acting to hold the upper edges of the valve flap together, and having a supplementary sheet bent to form a sleeve flattened inside the valve and extending into it to form a flexible extension of the valve flap, whose lower end is virtually in alignment with the lower bent edge of said flap; characterized in that the upper edge of the flattened sleeve is held by the stitched seam; because said sleeve is split virtually along its lower edge from the inner end backward at a considerable distance to the outside of the valve, and the upper inner corner portion of the sleeve is cut virtually along the line that is cut. extends diagonally from the inner top edge of the multi-fold flap downward and inwardly of the bag, whereby, when this is filled and widened the lower lower portion of the sleeve will overlap in said slot while taking up positions against the inside of the upper part of the bag under the pressure of the contents thereof. (Machine-translation by Google Translate, not legally binding)