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| Multilayered container |
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| Plastic bottle forming machine |
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| Bottle having ribbed bottom |
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Centrifugally loaded self-sealing integral one-piece cap/closure
| Details |
Inventors: Moore, Patrick Q.;
Assignee: Beckman Coulter, Inc. (Fullerton, CA)
Primary Examiner: Warden, Sr.; Robert J.
Assistant Examiner: Moazzam; Fariborz
Attorney, Agent or Firm: May; William H., Kivinski; Margaret A.
A capping and sealing assembly for a sample-holding centrifuge container which features a self-sealing lid that forms a fluid-tight seal in an opening of the canister with a predetermined amount of force, with the force being dependent upon the centrifugal load to which the capping assembly is subjected. The lid includes a cover portion and a peripheral member surrounding the cover portion and extending transverse thereto. The lid is disposed within an open end of the container, with the peripheral member having a frusto-conical surface that faces the container's wall. A gasket is disposed about the frusto-conical surface, forming a fluid-tight and air-tight seal with the cylindrical wall of the canister. The gasket is received in a channel formed into the frusto-conical surface. A region of the channel includes a vent slot to facilitate removal of the container from the canister. A plurality of arcuate ribs extend across the cover portion, between opposed areas of the peripheral member. Each of the ribs are adapted to flex, under centrifugal force, expanding the opposed areas outwardly. In this manner, the sealing force between the peripheral member and the wall is increased. |
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DETAILED DESCRIPTION A capping assembly for a sample-holding centrifuge container features a self-sealing lid that seals an opening of the container with a predetermined amount of force, with the force being dependent upon the centrifugal load to which the capping assembly is subjected.
The canister includes a closed end, an open end, disposed opposite to the closed end, and a cylindrical wall extending therebetween.
The lid includes a cover portion and a peripheral member surrounding the cover portion and extending transverse thereto.
The lid is disposed within the open end, with the peripheral member having a frusto-conical surface that faces the cylindrical wall.
A channel or recess is formed into the frusto-conical surface into which a gasket is received to form a fluid-tight and air-tight seal with the cylindrical wall of the canister.
The gasket channel includes a vent slot for releasing the seal upon completion of a centrifugation run.
As used herein, a fluid-tight seal means that the seal is impervious to both liquid flow and air flow.
A plurality of arcuate ribs extend across the cover portion.
Each of the plurality of ribs is adapted to flex, under centrifugal load, expanding the peripheral member outwardly.
In this manner, the sealing force between the peripheral member and the cylindrical wall is increased.
Preferably, the self-sealing lid is employed in a dual-vessel centrifuge container.
In addition to the canister, the dual-vessel centrifuge container includes a receptacle having a tubular portion extending from a threaded neck portion, terminating in a closed nadir.
The neck portion includes a plurality of threads and defines an open mouth.
The peripheral member includes a threaded region which engages the plurality of threads of the neck portion.
A sealing device, e.
g.
, an o-ring or other type of elastomer or plastomeric material, is disposed between the second major side and the neck to form a fluid-tight and air-tight seal therebetween.
The relative dimensions of the lid, canister and receptacle are chosen so that the receptacle fits within the canister
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Nonmetallic Processes 
