Patent ID: 7086846

Claim:
An electro spinning apparatus for producing a continuous polymer filament, fiber and the like from a thread-forming polymer, which comprises: a. an electrically conductive liquid polymer extrusion die having at least one die orifice, b. an electrically conductive filament collection means spaced from the die orifice, c. an electrode means positioned between the die orifice and the filament collection means, the electrode means comprising n chargeable electrodes, wherein n is an integer of from 1 to 50, d. means for providing a first electrical bias to the die and an (n+2) th electrical bias to filament collection means, e. means for providing a second electrical bias to the electrode means, said second electrical bias having the same polarity and a magnitude equal to or less than that of the first electrical bias, and f. wherein the electrode means comprises a plurality longitudinally spaced electrodes.