Two piece crown liner punch
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jul 26, 1994
Grant Date -
N/A
app pub date -
Feb 22, 1993
filing date -
Feb 22, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for forming liners of thermoplastic material within closure shells contains a movable die having an inner punch member and an annular outer mold member both of which are movable up and down in relatively slidable relation with each other and arranged so that the inner punch takes its lowermost position after the outer mold member has taken its lowermost position. In one embodiment of the present invention, the lower end surface of the outer mold member is beveled and defines a plurality of radial grooves. The lower end wall of the outer mold member is moved downwardly until it is opposite the horizontal wall of the closure shell. As the inner punch moves into its lowermost position, thermoplastic material is forced through the radial grooves so that a thick annular pad portion of the seal liner is formed beneath the lower end wall of the outer mold member.
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