Mold assembly for a container closure
OwnerSaad Tahainventor
Life of this patent
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Abstract
A mold assembly for a container closure includes a mold portion with a stripper ring adapted for engaging a shoulder of the closure, and a threaded core having an external, asymmetrical helical thread defining an internal, asymmetrical helical thread of the closure. The external, asymmetrical helical thread has a ramped surface defining a ramped surface of the internal, asymmetrical helical thread. Relative linear movement between the stripper ring and the threaded core causes withdrawal of the threaded core from the closure in a linear direction. The ramped surfaces of the internal and external, asymmetrical helical threads cooperate to facilitate the withdrawal.
Claims14
A mold assembly for a container closure having an end wall and a skirt extending from the end wall, the skirt having an inner skirt surface with an internal, asymmetrical helical thread formed thereon for engaging an external helical thread of a container, the internal, asymmetrical helical thread having a ramped surface, a security ring frangibly connected to the skirt, and a shoulder extending between the security ring and the skirt, the mold assembly comprising:
- first and second mold portions cooperating to define, in a closed position, a closure cavity;
- the second mold portion having:
- a stripper ring adapted for engaging the shoulder of the closure;
- and
- a threaded core having an external, asymmetrical helical thread defining the internal, asymmetrical helical thread of the closure, the external, asymmetrical helical thread having a ramped surface defining the ramped surface of the internal, asymmetrical helical thread;
- wherein relative linear movement between the stripper ring and the threaded core causes withdrawal of the threaded core from the closure in a linear direction, with the ramped surfaces of the internal and external, asymmetrical helical threads cooperating to facilitate the withdrawal.
A mold assembly for a container closure having an end wall, an annular seal and a skirt extending from the end wall and a frangible security ring extending from the skirt, the mold assembly comprising:
- first and second mold portions cooperating to define, in a closed position, a closure cavity;
- the second mold portion having:
- a threaded core;
- an inner core located in the threaded core, the inner core and threaded core cooperating to define an annular seal on the end wall of the closure, wherein relative movement between the inner core and threaded core creates a first clearance space into which the annular seal can deform during ejection of the closure from the mold assembly;
- an outer core surrounding the threaded core, the outer core and threaded core cooperating to define at least an inwardly extending flap portion of the security ring, wherein relative movement between the outer core and threaded core creates a second clearance space into which the flap portion of the security ring can deform outwardly during ejection of the closure from the mold assembly.
Dependencies are inferred from the claim text.