Gusseted type ea.gs

Abstract

Abstract 1. A BAG OF TUBULAR FORM COMPRISING A PLURALITY OF AT LEAST THREE CONTIGUOUS PLIES OF FLEXIBLE SHEET MATERIAL, SAID BAG HAVING A FRONT SURFACE AND AN OPPOSITELY DISPOSED REAR SURFACE ADAPTED TO OVERLAP SAID FRONT SURFACE AT ONE END OF SAID TUBE WHEN SAID BAG IS IN ITS ASSEMBLED CONDITION, SAID BAG BEING LONGITUDINALLY AND REVERSELY CREASED ALONG DIAMETRICALLY OPPOSED PORTIONS TO PROVIDE A PAIR OF OPPOSITELY DISPOSED GUSSETS INTERPOSED BETWEEN SAID FRONT AND REAR SURFACES, EACH OF SAID GUSSETS HAVING AN EXPOSED FRONT PORTION AND AN EXPOSED REAR PORTION WHICH IS STEPPED ABOVE SAID FRONT PORTION AND ADAPTED TO OVERLAP SAID FRONT PORTION WITHIN THE OVERLAPPED AREA OF SAID FRONT AND REAR SURFACES AT SAID END OF THE TUBE WHEN SAID BAG IS IN ITS ASSEMBLED CONDITION, AT LEAST SOME OF THE BAG PLIES BEING STEPPED IN SAID FRONT AND REAR SURFACE PORTIONS TO PROVIDE EXPOSED PORTIONS THEREOF, A HEAT REACTIVE BONDING AGENT IN A DORMANT STATE SUBSTANTIALLY COVERING SAID EXPOSED GUSSET PORTIONS AND FRONT AND REAR SURFACE PORTIONS AT SAID END OF THE TUBE WHEN SAID BAG IS IN ITS ASSEMBLY CONDITION, AND SAID BONDING AGENT BEING REACTIVATABLE TO CLOSE SAID BAG END, THE OPPOSITE END OF SAID TUBE THE REVERSE OF SAID ONE END AND BEING FOLDED OVER AND ADHERED TO A SURFACE OF SAID TUBE BY MEANS OF SAID BONDING AGENT.

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