Browse Prior Art Database

STATIC GROUND SYSTEM WITHIN A PAPER PATH IDLER

IP.com Disclosure Number: IPCOM000027114D
Original Publication Date: 1995-Apr-30
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 98K

Publishing Venue

Xerox Disclosure Journal

Abstract

Electrostatic discharge (ESD) through a paper path idler is a charge neutralization process marked by a spark following a course from the outer race of a bearing to the inner race. The charge dissipation causes pitting of the ball races and consequently shortens the life of a bearing. To prevent premature failure of the bearing by an ESD event, an ESD ground system is proposed whereby the charge on all parts of a paper path idler are kept at zero volts.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 56% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

STATIC GROUND SYSTEM WITHIN A PAPER PATH IDLER
John
D. Gramlich

Proposed Classification

US. C1.384/537 Int. C1. F16C

XEROX DISCLOSURE JOURNAL - Vol. 20, No. 2 March/April 1995 189

[This page contains 1 picture or other non-text object]

Page 2 of 2

STATIC GROUND SYSTEM WITHIN A PAPER PATH IDLER (Cont'd)

Electrostatic discharge (ESD) through a paper path idler is a charge neutralization process marked by a spark following a course from the outer race of a bearing to the inner race. The charge dissipation causes pitting of the ball races and consequently shortens the life of a bearing. To prevent premature failure of the bearing by an ESD event, an ESD ground system is proposed whereby the charge on all parts of a paper path idler are kept at zero volts.

As shown in the Figure, a ground path is provided for the charge developed on the outside diameter of a conductive plastic paper path idler 10. This is accomplished through the use of a pair of simple graphite brushes 22 comprising passive static eliminators that snap into corresponding internal undercut portions of the idler 10. The fibers of the graphite brushes 22 contact a conductive shaft 28 which, in turn, is connected to an ESD ground via conductive guide 24. Alternatively, a conductive spring tang 26 may provide a path to the ESD ground. The ESD ground is a common reference point in a product that connects all ESD susceptible components together so as to bleed off or equalize the cha...