Abstract: A machine for packaging articles into bags made of heat-sealable flexible material starting from a reel of a continuous web having two superimposed flat layers mutually permanently joined along one side and provided—along the other side—with an openable closure. The machine includes a device for supplying the web having a pair of superimposed parallel guide rollers arranged transversely on opposite sides with respect to the web and whose angular position with respect to the advancement direction of the web is adjustable. The two guide rollers have a superficial shape suitable to avoid both the formation of irregularities of the web—such as folds and creases—as well as the damaging of the openable closure.

Abstract: An apparatus for the packaging of articles into flexible plastic bags supplies a continuous web formed by two flat superimposed layers to a fill-in station and the web is cut transversally to form web lengths of the desired length. The upper edges of the web lengths are grasped and spread apart to introduce articles, while contemporaneously the presence/absence of such edges is detected to automatically allow or inhibit the operation of the apparatus, respectively.

Abstract: A continuous web flexible material having a tubular or a single-fold configuration is intermittently fed to a fill-in station of the articles to be packed. The web is transversely out so as to form a web length of a desired size whose edges are mutually spread apart and then held upon filling up of the articles. Releasable adhesive grasp members are provided to spread apart the edges of the web length.