Patent ID: 8646974
Filing Date: 2014-02-11
Classification: B31B,B65B,B65D

Abstract:
1. An as-manufactured multi-wall sack that comprises an inner pouch made from a polymeric material and an outer bag made from a paper-based material, with the sack having a top end that (a) is open in the as-manufactured form of the sack so that the sack can be filled with product via the open end and (b) is formed so that it can be closed to form a top block end, and wherein, in the as-manufactured form of the sack, the sack comprises pressure adhesive that connects together the inner pouch and the outer bag at the open top end of the sack, and wherein the amount and/or the type of pressure adhesive is selected so that the adhesion of the inner pouch to the outer bag is greater on one of a front or a rear side of the sack than on the opposite side of the sack so that, as part of a sequence of steps to close the outer bag after a step of heat sealing the inner pouch closed, the front and rear sides of the outer bag can each be folded outwardly in opposite directions with the sealed inner pouch being selectively detached from one of the sides of the outer bag and being retained by the other side and folding outwardly with that other side.