Cartridge delivery system utilizing film bags

A method for dispensing flowable compositions, the method comprising:

• forming a film pack cartridge comprising:
• an integrally molded synthetic resin face plate having a discharge opening therein and a nosepiece on one face of the face plate extending about the opening;
• and, a pair of flexible synthetic resin film bags each having one end sealingly adhered to the other face of the face plate about the discharge opening, the other end of the film bags being sealed;
• wherein the face plate is overmolded on the film bags by melting an exposed end portion of the film bags using heat of the synthetic resin when in a molten state to cause the end portion of the film bags to become molten and intermix with the molten synthetic resin to produce a sealed integrated structure of essentially uniform composition having no distinct layers at the interface;
• wherein the film bag is disposed inwardly of the face plate and is fabricated from substantially the same synthetic resin as the face plate;
• filling the bag by injecting flowable compositions through the nosepiece;
• placing a sealing cap on the nosepiece;
• placing the cartridge in a tubular sleeve;
• removing the cap and coupling a dispensing mixer to the nosepiece;
• moving a piston in the sleeve against the other end of the bag to discharge the contents of the bag through the discharge opening and mixer.

A method for producing a dispenser pack for a flowable composition, the method comprising:

• mounting a generally tubular flexible synthetic resin film bag on a mandrel;
• inserting the mandrel and bag into a mold providing a cavity about an end of the mandrel and the film bag, the film bag being configured to receive a face plate;
• injecting into the cavity molten synthetic resin of substantially the same composition as that of the film bag to form the face plate with the end of the film bag sealingly adhered thereto with an integrated structure of essentially uniform composition having no distinct layers at the interface by melting an exposed end portion of the film bag using heat of the molten synthetic resin to cause the end portion of the film bag to become molten and intermix with the molten synthetic resin, the face plate having a discharge opening therein and a nosepiece about the opening aligned with the end of the film bag, the face plate being overmolded on the film bag, the film bag being disposed inwardly of the face plate;
• and
• removing the face plate, bag and mandrel from the cavity.