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Free Fall Feed Technique For Fine Wire

IP.com Disclosure Number: IPCOM000049018D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Altimari, R: AUTHOR [+3]

Abstract

One of the techniques for fabricating a plasma display device includes the winding of discrete conductors on a pair of glass plates, the conductors being approximately .001 inch in diameter. A technique for feeding such fine wire from a spool to a wire placement nozzle in a controlled manner without breakage operates as follows.

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Free Fall Feed Technique For Fine Wire

One of the techniques for fabricating a plasma display device includes the winding of discrete conductors on a pair of glass plates, the conductors being approximately .001 inch in diameter. A technique for feeding such fine wire from a spool to a wire placement nozzle in a controlled manner without breakage operates as follows.

Referring to the drawing, a wire spool 1 and its cover 3 are positioned vertically on a spool holder 5. The wire 7 pays off freely over the side flange of spool 1. Initial control of pay-off rate is provided by six evenly spaced, radially positioned camel hair bristles 9, approximately .002 inch in diameter and attached to the underside 11 of the spool holder 5. As the wire flows from the spool over the bristles, it passes through a funnel 13 which aligns the wire over an electrical pick-up guide 15, with nozzle 17. The funnel 13 provides an element of feed control via the natural static charge at its surface. The "cling" exhibited by a standard PYREX* funnel was found optimum for the wire type and feed rate required. * Trademark of Corning Glass Works.

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