Patent ID: 6960316

Claim:
A method of cyclic injection-molding a plastic container or closure having a sidewall extending with at least an upward directional component from a base wall to a rim wall, wherein both an inner and outer surface of at least an upper portion of a given at least partially perimetric segment of the rim wall extend with both an outward directional component and a downward directional component; wherein at least a lower portion of the given segment of the rim wall extends with at least a downward directional component and an inward directional component; and wherein, at a given level of the lower portion above the base wall, the given segment has an inner surface and an outer surface that each extend with at least an inward directional component, the method comprising the steps of: (a) providing a mold cavity between first and second mold parts for forming the container or closure; (b) injecting fluid plastic material into the mold cavity to form the container or closure; (c) separating the first and second mold parts; and (d) removing the container or closure from the separated mold parts, wherein step (d) comprises contemporaneously removing the inner surface and the outer surface of the lower portion of the given segment at the given level from one of the separated mold parts.