| 摘要 |
The present invention relates to a method of forming and closing bags, said method comprising steps consisting in delivering closure means comprisi ng at least two complementary strips disposed on respective backing sheets, in delivering a film that is to constitute the walls of the bag, in heat-sealing a first backing sheet of the closure means to the film along at least one of the longitudinal edge s of said sheet, with the closure means being angularly positioned transversely to the longitudinal direction of the film, in shaping the resulting film as equippe d with the closure means into a tube and in heat-sealing the second backing sheet of th e closure means to an opposite face of the film along only one edge of said second sheet. |
