Molded closure and apparatus for making same
AssigneeRexam Medical Packaging Inc.
InventorsJames A. Francois, Kerry W. Dodds
Life of this patent
Estimating the term…
Abstract
A molded closure having an auxiliary thread for removal of an incomplete closure from a molding cavity, the molded closure including a helical auxiliary thread projecting inwardly from a cylindrical wall portion of the closure to provide engagement between the closure and the molding core, so that the closure may be threadably removed from the molding cavity by threadably disengaging the molding core from the molding cavity after an incomplete run of the fabrication process. A molding assembly with which the auxiliary thread may be formed in a molded closure is also provided.
Claims24
A molded closure comprising:
- a side wall having at least one cylindrical wall portion, said cylindrical wall portion having a first inner wall on which an auxiliary thread is disposed, said auxiliary thread being inwardly directed;
- said side wall also having at least one principal thread being inwardly directed thereon;
- and,
- said auxiliary thread being disposed at a first end of said side wall and said principal thread being disposed toward an opposed second end of said side wall.
A molded closure comprising:
- a side wall having at least one cylindrical wall portion, said cylindrical wall portion having a first inner wall on which an auxiliary is disposed, said auxiliary thread being inwardly directed;
- said side wall also having at least one principal thread, said principal thread being inwardly directed;
- said auxiliary thread being disposed toward a first end of said side wall and said principal thread being disposed toward a second end of said side wall;
- and,
- said auxiliary thread being incongruent to said principal thread.
A molded closure comprising:
- a side wall having at least one cylindrical wall portion, said cylindrical wall portion having an auxiliary inwardly directed thread disposed thereon, said auxiliary inwardly directed thread being helical;
- said side wall also having at least one principal inwardly directed thread;
- and,
- said auxiliary inwardly directed thread being disposed toward a first end of said side wall and said principal inwardly directed thread being disposed toward a second end of said side wall, said auxiliary inwardly directed thread having a first depth, said principal inwardly directed thread having a second depth, wherein said second depth is greater than said first depth.
A molded closure comprising:
- a side wall having at least one cylindrical wall portion, said cylindrical wall portion having a first inner wall on which an auxiliary thread is disposed, said auxiliary thread being inwardly directed;
- said side wall also having at least one principal thread, said principal thread being inwardly directed;
- said auxiliary thread being disposed toward a first end of said side wall and said principal thread being disposed toward a second end of said side wall;
- and,
- said side wall having a first diameter intersecting a portion of said auxiliary thread and said side wall having a second diameter intersecting a portion of said principal thread, said first diameter being less than said second diameter.
A molded closure, comprising:
- a primary helical thread formed on a cylindrical side wall of said molded closure;
- a separate auxiliary thread formed on said cylindrical side wall of said molded closure along an upper periphery;
- said primary helical thread having a first thread depth, said auxiliary thread having a second thread depth, said first thread depth being about double said second thread depth.
A molded closure having a primary thread and an auxiliary thread on an inner side wall, comprising:
- a molded closure having an inwardly directed auxiliary helical thread and an inwardly directed primary helical thread, said auxiliary helical thread formed on a peripheral end of said molded closure, said auxiliary thread having a first thread depth, said primary thread having a second thread depth, said first thread depth less than said second thread depth;
- said molded closure having a first and a second tier, said auxiliary thread formed on said first tier and said primary thread formed on said second tier;
- wherein said auxiliary thread is a congruent helical thread and said primary thread is a congruent helical thread, said auxiliary thread incongruent with said primary thread.
A molded closure having a helical primary thread and a helical auxiliary thread, comprising:
- a mold closure having a cylindrical wall portion, said cylindrical wall portion having an outer wall;
- an auxiliary core thread formed on said outer wall at an upper periphery and a primary core thread formed on said outer wall, said auxiliary core thread formed above said primary core thread and discontinuous therewith and further having a continuous wall section extending from said auxiliary core thread to said primary core thread.
Dependencies are inferred from the claim text.