In the process and machine of the invention, two strips (A and B) of heat weldable material are supplied, reciprocally facing one another, in an advancement direction (F). The strips are welded at predetermined welding zones and give rise to cells (4) each having at least one opening (5). A part of the...http://www.google.com/patents/US20030039780?utm_source=gb-gplus-sharePatent US20030039780 - Process and a machine for forming containers
