Computer generated stopper

Details Computer generated stopper Computer generated stopper

B - Operations, Transporting

65

D

354/1, 354/46, 2

B65D 51/00 (2006.01) B65D 39/04 (2006.01) F16J 15/02 (2006.01)

Patent

CA 1276592

COMPUTER GENERATED STOPPER Abstract of the Disclosure A stopper or closure is provided as a closure for containers in which the stopper profile is computer generated to take into consideration radial stress at the stopper/container interface, and to eliminate tensile stress therealong which tensile stress is an indication that a portion of the stopper wall is not engaging the opposed container surface. The stopper of the invention is particu- larly appropriate for use in evacuated blood sample collection tubes for eliminating "gray bands" or regions where the stopper and tube do not contact, and n red spots" formed in small cavities generated on the internal surface of the stopper at the withdrawal position of a blood collection needle having been inserted in the stopper.

548560

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