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US 5,961,911 AGranted
Process for manufacture of closure assembly
AssigneeBecton, Dickinson and Company
InventorsChorng-Fure Robin Hwang, Frank E. Martin, Tim M. Sullivan, Joel L. Williams
Life of this patent
Estimating the term…
Abstract
A process for making a closure assembly includes placing a closure cap portion in a compression mold, introducing a melt of elastomer, pressing the melt into a septum against the cap and applying a foil barrier against the septum. The process may be performed in a rotary compression molding apparatus.
Claims10
A process for making a closure assembly comprising:
- a) placing a plastic cap portion of a closure assembly having a top wall defining an opening into the female cavity of a compression mold, said cap portion being placed with said top wall adjacent to the bottom wall of said mold;
- b) adding a thermoplastic elastomer to said cap portion;
- c) pressing said elastomer into a septum sealed against said top wall and covering said opening;
- and
- d) affixing a permeability lowering barrier to said septum, said assembly being puncturable through said opening and said septum.
2 more elements
A process for making a closure assembly comprising:
- a) placing a polyolefin cap portion of a closure assembly having a top wall defining an opening into the female cavity of a compression mold, said top wall being adjacent to the bottom wall of said mold;
- b) introducing a melt of a copolymer of ethylene and an alpha olefin of 3-20 carbon atoms into said cap portion;
- c) pressing said copolymer with a matching male pin to form a septum against said top wall and covering said opening;
- and
- d) affixing a permeability-lowering barrier to said septum, said assembly being puncturable through said opening and said septum.
2 more elements
A process for making a tube closure assembly comprising:
- a) placing a polyolefin cap portion of a closure assembly having a top wall defining an opening into the female cavity of a compression mold at a first station of a rotary compression molding apparatus, the top wall of said cap portion being placed adjacent to the bottom of said mold;
- b) adding a predetermined quantity of a melt of a silane-grafted copolymer of ethylene and an alpha olefin of 3-20 carbon atoms into said cap portion in said female cavity;
- c) pressing said copolymer with a matching male pin to form a septum against said top wall and covering said opening;
- and
- d) pressing a permeability-lowering barrier against said septum with said male pin, said assembly being puncturable through said opening and said septum.
2 more elements
Dependencies are inferred from the claim text.