Method of forming a bonded package gusset

摘要: The present invention is directed to a method forming bottom-gusseted package, wherein each package includes an inwardly-extending, pleat-like gusset at the bottom of package. To permit heat-sealing formation sleeve from which formed comprises lamination two differing polymeric materials, so that only exterior surface exhibits desired heat- sealing characteristics. facilitate formation, sleeves gussets are maintained in temporarily closed or sealed configuration during by providing preferably frangible bond seal edge sleeve. This result achieved folding laminate material, and joining outer layer material formed, while inner unsealed condition.