Patent ID: 6478041
Filing Date: 2002-11-12
Classification: B65B,Y10T

Abstract:
A fill valve assembly for filling a flat bag with an inhomogeneous fluid or viscous product, which comprises(a) a valve head of a cross-section dimensioned to fit into the flat bag and having a primary and a secondary axis, the primary axis being substantially longer than the secondary axis, the valve head having (1) an outlet for the product and an extension of the outlet, the outlet and outlet extension extending along a central longitudinal axis of the valve head, and (2) at least two product supply passageways extending in the valve head substantially parallel to the outlet and outlet extension, each product supply passageway having an end section terminating in the outlet at an angle of 25Â° to 45Â°, (b) a purging space adjoining the outlet extension along the central longitudinal axis and having a somewhat larger diameter than the outlet extension, at least a part of the purging space being located in the valve head, and (c) a plunger comprising a piston and a piston rod for moving the piston up and down through the outlet extension into three positions, the outlet and outlet extension having at least twice the length of the piston, (1) the piston in a lowermost first position closing the outlet and the end sections of the product supply passageways, (2) the piston in an intermediate second position being positioned in the outlet extension and opening the outlet and the end sections of the product supply passageways, and (3) the piston in an uppermost third position being positioned in the purging space for cleaning the piston.