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Method and apparatus for manufacturing electrostatically spun structure

  • US 5,024,789 A
  • Filed: 06/19/1989
  • Issued: 06/18/1991
  • Est. Priority Date: 10/13/1988
  • Status: Expired due to Fees
First Claim
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1. A method of electrostatically spinning a tubular fibrous structure using an electrostatically charged, spinning mandrel and an electrostatically charged grid means in the region of the mandrel to produce an electrostatic field, which method comprises the steps of introducing into said electrostatic field a fiberizable material, collecting on said mandrel a first portion of said liquid in the form of fibers attracted directly to the mandrel and a second portion of said liquid in the form of fibers having been deflected towards said grid means to follow a longer path to said mandrel than the fibers from said first portion of liquid, whereby a tubular fibrous structure is produced having fibers of different diameters and varying fiber orientations.

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