Method of forming, filling, and sealing scrim reinforced plastic bags

The method of preparing filled industrial size bags by the steps comprising:

• converting a scrim reinforced composite web into a tube having overlapped marginal edges, sealing the marginal edges together securing the scrim in the seal, thereafter periodically filling the tube with product and sealing the tube transversely about each successive product fill, securing the scrim also in the transverse seals, combined therewith, the further steps of preparing the composite web in line with the foregoing steps, and comprising the steps of unwinding a carrier ply comprising a plastic film from a wound up supply roll and training the carrier ply about the surface of revolution of a wound up roll of a continuous reinforcing scrim ply, drawing the carrier ply forward and causing it to travel about the surface of revolution of the scrim roll substantially without slippage, thereby tying the carrier ply by frictional surface contact to the scrim ply to provide substantially equal lengths of the scrim ply and the carrier plies in combined form, and applying a second plastic film to the opposite side of the scrim ply, said process being further characterized by the carrier ply comprising a ply of said filled industrial size bags.