Bottles and jars – Closures – Self-sealing – piercable-type closure
Patent
1991-05-30
1994-12-06
Shoap, Allan N.
Bottles and jars
Closures
Self-sealing, piercable-type closure
215355, 215364, B65D 3900
Patent
active
053702522
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION
The present invention relates to an improvement, modification or advance over the invention disclosed in PCT Application No. PCT/AU88/00353 filed Sep. 9, 1988, entitled "CAP".
The present invention relates to a cap or closure member for a container and relates particularly but not exclusively to a cap or closure member capable of sealing the container in a substantially pressure tight manner to allow a predetermined reduced pressure to be applied to the cap and container combination to enable a fluid or fluidized sample to be drawn into the container by way of the reduced pressure. The present invention also relates to a cap or closure member which enables access to the fluid sample so collected without the necessity of removing the cap from the container. The present invention also relates to a cap or closure member which enables access to the interior of the container by disassembling only a portion of the cap.
In particular, the present invention relates to such a cap having a membrane or barrier means which serves as a barrier and substantially reduces contamination and leakage of container contents when the cap is partially disassembled.
DEFINITION
Throughout this specification, the term "barrier" includes flap, valve, split or perforated membrane or buffer means which serves to reduce the passage of container contents or fluid therethrough.
PCT/AU88/00353 discloses a two part cap for a container, the cap enabling piercing access to the interior of the container for fluid sampling or evacuation thereof and non-piercing access by means of removing the top part of the cap structure to allow substantially unimpeded access to the interior of the container.
The top part of the cap comprises a substantially T-shaped portion, the bottom of which may come into contact with any fluid in the container when the cap is in a closed position.
OBJECT(S) OF INVENTION
An object of the present invention is to alleviate some or all of the disadvantages of the prior art by providing a cap in which a barrier portion forms at least a partial barrier to leakage of container contents.
A further object of the present invention is to provide a cap in which an air cushion is formed in conjunction with the barrier means to further alleviate contamination and contents leakage.
DESCRIPTION OF INVENTION
The present invention may (in one preferred form) provide a cap adapted for co-operation with a container having an upper portion and a lower portion adapted to form a resealable enclosed space, said cap having barrier means disposed to reduce leakage of container contents.
The present invention may also provide a cap for attachment to a container, the cap forming a resealable enclosed space and having upper and lower portions, wherein, in a sealed position, an air cushion is provided adjacent the base of the lower portion, the cushion serving as a buffer to reduce contact of container contents with the upper portion.
The present invention also may (in another preferred form) provide a cap adapted for co-operation with a container to provide a resealable enclosed space capable of evacuation to a predetermined level of reduced pressure, said cap having two parts; portion having an integrally formed sealing member dependent therefrom; and access to said enclosed space, the first and second parts being adapted to co-operate together to form a re-useable seal, the cap being adapted for piercing or non-piercing communication with said enclosed space; including
the improvement comprising: reduce container contents leakage from said enclosed space or contamination of said first part by said contents.
The barrier means may be in the form of a split or perforated membrane, flap(s), buffer or valve like structure.
The present invention may also provide a cap adapted for co-operation with a container to provide a resealable enclosed space, said cap comprising an upper portion including an elongate member, and a lower portion having a barrier disposed on the lower portion to substantially prevent container contents
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patent: 4301936 (1981-11-01), Percarpio
patent: 4441621 (1984-04-01), Matukura et al.
patent: 4545497 (1985-10-01), Martha, Jr.
patent: 4635807 (1987-01-01), Knapp
patent: 4664274 (1987-05-01), Konrad
patent: 4715360 (1987-12-01), Akui et al.
patent: 4809679 (1989-03-01), Shimonaka et al.
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Parsons Joanna M.
Parsons Joseph R. B.
Caretto Vanessa
Joseph Parsons Nominees Pty. Ltd.
Shoap Allan N.
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