Patent ID: 6261000
Filing Date: 2001-07-17
Classification: B31B,B65D

Abstract:
A packaging bag, comprising:a folded packaging sheet, having a longitudinal extent, for forming a packaging bag;a pair of laterally spaced bellows formed within side edge portions of said folded packaging bag sheet;cutout portions respectively formed within each one of said pair of laterally spaced bellows so that said packaging bag has only two sheet thicknesses superimposed with respect to each other within a mouth region of said bag; andheat-sealed regions for closing and sealing said packaging bags;each one of said cutout portions being defined by two rectilinear longitudinal edges coinciding respectively with outer definition lines of said laterally spaced bellows, a rectilinear transverse edge extending transversely with respect to said longitudinal extent of said packaging bag sheet, and a second transverse edge that is not rectilinear and is concave towards said mouth region of said bag.