B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/756
B29C 47/24 (2006.01) A61F 2/06 (2006.01) B29C 41/02 (2006.01) B29C 41/32 (2006.01) B29C 47/00 (2006.01) B29C 47/20 (2006.01)
Patent
CA 1181913
ABSTRACT A device for fabricating multi-layer tubing has a reservoir for tubing solution and discharges such solution from an opening in the reservoir bottom. The reservoir is suspended so as to remain level. Extending through the opening is a vertical rod of smaller diameter but itself suspended by a flexible wire so as to remain vertical. Material in the reservoir extrudes as an annulus even in cross- section by passing between the edge of the reservoir opening and the rod. Such extruded material hardens into one layer of the tubing. There is a repetition with a larger reservoir opening and so depositing a larger tube that is dried on and over the first tube. This is repeated as often as desired to get a finished tube of the proper inside and outside diameter. The method is following in succession the steps described above.
396208
Beckham Donald R.
Ward Robert S. Jr.
Smart & Biggar
Thoratec Laboratories Corporation
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