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Method of balloon formation by cold drawing/necking

  • US 6,168,748 B1
  • Filed: 09/14/1998
  • Issued: 01/02/2001
  • Est. Priority Date: 03/02/1995
  • Status: Expired due to Term
First Claim
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1. A method of making a balloon for a catheter device, comprising the steps:

  • extruding a segment of thermoplastic material having a predetermined wall thickness and length, the segment having a proximal end, a distal end and a center portion;

    drawing the segment to a predetermined length while maintaining the temperature of the segment below the glass transition temperature of the thermoplastic material, or below the highest glass transition temperature if the material is a block copolymer, wherein the proximal end forms a first waist; and

    expanding the segment having a first waist in a mold to produce the balloon, the balloon having a body portion, wherein the center portion of said segment becomes the balloon body portion.

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