초록 ▼

A closure device for severing the frangible section between the cap and body of a blow-fill-seal plastic container comprising an expandable ring constructed and arranged to encircle the container cap, an outer ring having at one end internal threads compatible with the external threads located on th

A closure device for severing the frangible section between the cap and body of a blow-fill-seal plastic container comprising an expandable ring constructed and arranged to encircle the container cap, an outer ring having at one end internal threads compatible with the external threads located on the neck of the container body and a tamper proof overcap. Counterclockwise rotation of the outer ring transmits uniform upward pressure to the expandable ring which causes tension between the container cap and container body, rupturing the frangible line of weakness on the container, to permit opening of the container. Conversely, clockwise rotation of the outer ring causes compression to rupture the frangible line of weakness. Subsequent counterclockwise rotation opens the container. In either case the container cap is retained within the outer ring and is replaceable on the container.

대표청구항 ▼

A closure device for use with a blow-fill-seal container, said container having an integral cap and body portion, said cap including a top, a cap abutment at said top, and a cap groove below said cap abutment, said body portion including a threaded neck and being connected to said cap by a frangible

A closure device for use with a blow-fill-seal container, said container having an integral cap and body portion, said cap including a top, a cap abutment at said top, and a cap groove below said cap abutment, said body portion including a threaded neck and being connected to said cap by a frangible line of weakness between said cap and said neck, said closure device comprising in combination, a substantially circular outer ring means, and a separate substantially circular expandable ring means, said outer ring means including a lower portion and an upper portion, said lower portion having internal threads compatible with said neck thread, said upper portion forming a force transmittance means bearing on said expandable ring means, and said expandable ring means being adapted to be captively carried in said cap groove in between said force transmittance means and said cap abutment so that rotation of said outer ring means in either direction transmits force through said force transmittance means to rupture said frangible line of weakness thereby permitting opening of said container.