Abstract: A tamper evident, unitary, plastic overcap adapted to be placed over a container neck flange, which neck flange has, adjacent its outboard end, a radially outwardly protruding annular ridge. The overcap comprises a relatively thin, flat, round, end wall having extending axially inboard therefrom an a cylindrical skirt with a plurality of circumferentally spaced, integral projections extending radially inward from an inboard portion of said skirt and adapted to underlie a container neck flange ridge, so that said overcap cannot be removed from a container neck flange without at least partial destruction of said overcap.

Abstract: Apparatus for making a thermoplastic container including a hollow, generally cylindrical body with a solid integral handling ring on at least one end thereof, wherein a solid mass of extrudate is injected from an extruder nozzle, enveloped by at least one of a pair of movable mold members, into an annular ring forming cavity of a blow mold that is in communication with a generally cylindrical body forming cavity of the mold, so when the mold is closed and a parison is blown to form a container body, the extrudate can be compressed to form an integral handling ring and the ring can be welded to the container body.

Abstract: A plastic container with an integral handling ring is formed in a mold having a pair of side sections movable toward each other and a pair of co-planar end sections movable toward each other and toward said side sections, by placing molten extrudate in a mold between the side and end sections, so that a handling ring can be formed and compression joined to the container at the same time the container is being formed by blow-molding.

Abstract: An externally and internally threaded replaceable closure device adapted to be threadably interposed between a container neck and a closure plug.