DISPOSITIVO PER LA PRODUZIONE DI SACCHETTI A CAMICIOLA A PARTIRE DA UN NASTRO DI TUBO FLESSIBILE IN FILM DI MATERIALE SINTETICO, MUNITO DI PIEGETURE LATERALI A SOFFIETTO.

摘要

Carrier bags resembling tank tops or singlets with cut-outs at the top for defining the handles are made by intermittently feeding a flattened tubular plastics web to a welding station where transverse weld seams are applied and bag sections are successively severed from the leading web end while the web is clamped between jaws. Each bag section is received by a suction belt conveyor with the assistance of a pressure roller and is then transferred to a suction drum which co-operates with a cutting cylinder for forming the cut-out and is provided with a projectable and retractable blade for folding the bag section transversely.