Sample tube cap

Details Sample tube cap Sample tube cap

B - Operations, Transporting

65

D

206/47

B65D 41/18 (2006.01)

Patent

CA 1181037

ABSTRACT OF THE DISCLOSURE This specification provides a simple closure device which is free from the disadvantages of the known closure devices but has the same reliability as that required in conventional devices of the same kind for use in ultra-centrifuges. The specification discloses a closure device for centrifuge test tubes, comprising an insertion piece extending partially from the opening into the interior of the test tube, whereby the outer diameter of the lower part of the portion to be inserted into the tube, corresponds to the inner diameter of the tube. The upper portion of the insertion piece, which is substantially outside the tube, has an outer diameter greater than the inner diameter of the tube and an abutment is provided outside the tube and, under the action of centrifugal force, the insertion piece presses the test-tube edge against the abutment. Preferably, the abutment has a conical or flat annular surface concentric with the container axis. In an embodiment of the invention, the abutment can comprise a ring which is slid from beneath over the test-tube. In another embodiment, the abutment can be formed in the rotor itself.

378466

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