Patent ID: 6957523

Claim:
A method of forming flexible plastic containers and filling with infusion-type solutions, the method comprising the steps of: printing of a film wound off a supply reel; directing a gas from a gas applicator toward and across a dry surface of the film to remove impurities therefrom; carrying the impurities away from the dry film surface with a nozzle juxtaposed the gas applicator to dry clean the film without contact with a liquid or system supports; aligning the film for folding thereof; hot-bar longitudinal welding of the folded film to create a bag; sterilizing a cavity of a valve by humidifying the cavity without exposing the cavity to ultraviolet radiation; welding the valve to the film using a control algorithm to control the speed and position of a welding head during the welding head's approach to an anvil; shaping the bag using hot tools controlled by an algorithm; and supplying a high precision dosage of a filling liquid into the bag.