flexible grosssack and processes of production.

摘要

A collapsible bag (10) and method of making it from blanks (28,30) of a flexible material which are cut from an elongate web (22) substantially without wasting any material between adjacent blanks (28,30). Each blank (28,30) has a circumferentially continuous central portion and four substantially identical isosceles triangular portions (36) at each end of the blank (28,30). Adjacent sides of adjacent triangular portions (36) are connected together to provide, when the bag (10) is expanded or filled, generally square ends which are interconnected by generally rectangular side walls (14). An access opening (74) is provided in an end of the bag (10) by terminating the connections (68,70) of its triangular portions short of their apexes. Preferably, a spout (76) is received in the access opening (74) and connected to the triangular portions (78).