Browse Prior Art Database

IMPROVED STATIC ELIMINATING SYSTEM

IP.com Disclosure Number: IPCOM000024796D
Original Publication Date: 1982-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 127K

Publishing Venue

Xerox Disclosure Journal

Abstract

There is a need for a self-contained static eliminating unit to eliminate the necessity for a complex harness and bulky power supply. In some machines there is often the problem of space as well as requirement of anti-static bars. Also, high voltage wire routings from the base (the power supply location) to the document handling system and the sorting system often introduce potential noise problems to the logic. In addition, the possibility of arcing exists from high tension cable bends to the nearest sharp edge or point of the frame (metal). Extra precaution has always been taken in reducing the above-mentioned problems by conventional insulating techniques. To overcome these probems in a simple manner, however, three concepts are proposed.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

IMPROVED STATIC ELIMINATING SYSTEM
R. R. Thettu
R. P. O'Connell

Proposed Classification
U.S. C1. 361/212

Int. CI. HOlg

w

WLTACiF LOW <BAR SHARP CMIDc/CTIV&euro SPIKE 7 CONNECTION PIN

      I CoNDUCrIvE CrnE INVERTER B STEPER

FIG. 4 FIG. 3

57 Volume 7 Number 1 January/February 1982

CONVEh'ZIONAL ANTISTATIC BAR

FIG. 2

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IMPROVED STATIC ELIMINATING SYSTEM (Cont'd)

There is a need for a self-contained static eliminating unit to eliminate the necessity for a complex harness and bulky power supply.

In some machines there is often the problem of space as well as requirement of anti-static bars. Also, high voltage wire routings from the base (the power supply location) to the document handling system and the sorting system often introduce potential noise problems to the logic. In addition, the possibility of arcing exists from high tension cable bends to the nearest sharp edge or point of the frame (metal). Extra precaution has always been taken in reducing the above-mentioned problems by conventional insulating techniques. To overcome these probems in a simple manner, however, three concepts are proposed.

The basic problem is the wire connection between the power supply and the static eliminating bar. Using this approach, routing of either low voltage DC or 110 AC would be required to the power supply driving the bar and high voltage routing would essentially be eliminated.

In one embodiment (Figure 11, the anti-static bar is made with primary and secondary windings ovee magnetic core. One end of the secondary winding is grounded and the other is attached to conductive foil over the insulation of the windings. The foil is covered with an insulating jacket of appropriate thickness. Sharp spikes of conductive material with a flat base similar to those in existing static bars are mounted to a depth l...