Patent Number: 6,168,748

Title: Method of balloon formation by cold drawing/necking

Abstract: A method for forming a balloon for a dilatation catheter involving the steps of extruding a segment of thermoplastic material, maintaining the center portion at a temperature below the glass transition of the thermoplastic material, drawing the segment to a predetermined length, wherein after the drawing the wall thickness of the center portion does not appreciably change, and expanding the segment in a mold to produce the balloon.

Inventors: Wang; Lixiao (Maple Grove, MN), Chen; Jianhua (Brooklyn Park, MN), Lee; Nao (Brooklyn Park, MN), Horn; Daniel J. (Shoreview, MN)

Assignee: SciMed life Systems, Inc.

International Classification: A61L 29/06 (20060101); A61L 29/00 (20060101); A61L 29/14 (20060101); A61M 25/00 (20060101); B29C 55/26 (20060101); B29C 55/00 (20060101); B29C 49/04 (20060101); B29C 49/42 (20060101); B29C 049/08 (); A61M 029/00 ()

Expiration Date: 01/02/2018