Packaging bag of thermoplastic synthetic plastic film

Claim 1

A bag of thermoplastic synthetic plastic film, particularly adapted for packaging printed material or the like, comprising: first and second equi-width panels of thermoplastic synthetic plastic film superimposed, with respective lateral margins aligned, to form opposite bag walls; the second bag wall panel being continued at one end into an integrally connected short length reflected over the edge of and onto the corresponding end margin of the first panel as a closure flap; said closure flap being releasably bonded to the said end margin by a stripe of non-hardening adhesive whereby the flap may be lifted to open the bag and then reclosed to be again held by the adhesive; the lateral margins of said panels being connected by welded side seams, the lateral ends of the closure flap being including in the welded side seams and thereby secured to the bag wall panels; the ends of the panels distal from the flap being free to afford an open mouth for bag filling, which is thereafter thermoplastically sealable; and in the regions of its two lateral ends the said closure flap having respective lines of perforations each extending over the entire height of the closure flap.