Device and method for making a segmented tubular capsule containing a biologically active medium
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United States of America Patent
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May 22, 2001
Grant Date -
N/A
app pub date -
Apr 16, 1999
filing date -
Sep 12, 1996
priority date (Note) -
Expired
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Abstract
Method of manufacturing a tubular capsule comprising fiber (11) having a wall delimiting internal compartments (11b) that are isolated from one another, the wall being made from a solution of at least one polymer and the compartments (11b) being full of a biologically active medium, the method comprising the steps of: coextruding the solution of at least one polymer and the biologically active medium by simultaneously injecting the polymer solution and the biologically active medium through a die (7) of determined dimensions; interrupting the injection of the biologically active medium at determined points in time to form in the fiber (11) successive compartments (11b) full of the biologically active medium and separated by a solid partition section (11a) consisting only of the polymer solution; immersing the fiber (11) in a coagulation liquid as it leaves the die (7) so as to initiate early coagulation of the polymer solution around the outside of the fiber (11); and simultaneously driving the fiber (11) through the coagulation liquid along a determined path.
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