# US 8,770,959 B2 · Device for producing electrospun fibers

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- Number: US 8,770,959 B2
- Document ID: US8770959B2
- Status: Granted
- Kind: B2
- Application number: 13/159,610
- Filed: 2011-06-14
- Published: 2012-03-15
- Granted: 2014-07-08
- Earliest claimed: 2005-05-03
- Assignees: The University of Akron
- Applicants: George Chase; Kitchaporn Nartetamrongsutt; Jackapon Sunthorn Varabhas; Gary Carlson; Seth Finley
- Inventors: George Chase; Kitchaporn Nartetamrongsutt; Jackapon Sunthorn Varabhas; Gary Carlson; Seth Finley
- Web page: https://patentgrep.com/patent/US8770959B2

## CPC

- D01D 5/0069: {characterised by the spinning section, e.g. capillary tube, protrusion or pin}
- D01D: MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS

## Abstract

Electrospinning nozzles include novel constructs for providing spinning pores that define the origin of jets of fiber-forming media. In some embodiments, a film covers relatively large holes in a nozzle body and provides spinning pores aligned with such large holes. In some embodiments, conductive tubes are secured at or about relatively large holes in a nozzle body and provide spinning pores fluidly communicating with fiber-forming media at such large holes. In yet other embodiments, nozzle bodies are provided with circular or semi-spherical surfaces having a plurality of spinning pores.

## Claims

### Claim 1

An electrospinning nozzle comprising:
a nozzle body having a hole therein, and
a film covering said hole and providing a spinning pore aligned with said hole, said spinning pore being smaller in cross-section than said hole.

### Claim 2 (depends on 1)

The electrospinning nozzle of claim 1, wherein said hole is provided by the natural porosity of the material forming said nozzle body.

### Claim 3

An electrospinning nozzle comprising:
a tubular nozzle body having an inner tubular surface for holding fiber-forming media; and
a conductive spring having a flat cross section and being secured at its outer circumference to said inner surface of said tubular nozzle body, whereby said conductive spring serves as an electrode to charge fiber-forming media within said tubular nozzle body and further serves to define a continuous shelf and catch for fiber-forming media forced into and through said tubular nozzle body.