Browse Prior Art Database

THE ELECTROSTATIC TRANSPORTATION OF TONER

IP.com Disclosure Number: IPCOM000026712D
Original Publication Date: 1993-Apr-30
Included in the Prior Art Database: 2004-Apr-06
Document File: 4 page(s) / 79K

Publishing Venue

Xerox Disclosure Journal

Abstract

Toner in a copier is transported electrostatically around it by means of a smooth-bore tube of dielectric material, which need not be straight. Wrapped around the tube are several helical windings which are insulated from each other. Electrostatic charges are applied to the windings in sequence, so as to produce a travelling wave of charge along the tube in the direction in which the toner is to be fed. One of the windings is uncharged so as to ensure that there is no flow of toner in the reverse direction.

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 88% of the total text.

Page 1 of 4

XEROX DISCLOSURE JOURNAL

THE ELECTROSTATIC TRANS- Proposed Classification PORTATION OF TONER U.S. C1.430/110
A. R. Delhomme Int. C1. G03g 09/08

/

XEROX DISCLOSURE JOURNAL - Vol. 18, No. 2 MarcWAprill993 229

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

Page 2 of 4

THE ELECTROSTATIC TRANSPORTATION OF TONER (Cont'd)

 First Second Third Switch Switch Switch

I

Conductor Number

Bias Charge Voltage

0 2 1 0

 Forth Switch

DlRECnON

 OF TONER MIGRATION

lol2l1Io

230 XEROX DISCLOSURE JOURNAL - Vol. 18, No. 2 MarcWApril 1993

1

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

Page 3 of 4

THE ELECTROSTATIC TRANSPORTATION OF TONER (Cont'd)

Toner in a copier is transported electrostatically around it by means of a smooth-bore tube of dielectric material, which need not be straight. Wrapped around the tube are several helical windings which are insulated from each other. Electrostatic charges are applied to the windings in sequence, so as to produce a travelling wave of charge along the tube in the direction in which the toner is to be fed. One of the windings is uncharged so as to ensure that there is no flow of toner in the reverse direction.

As shown in the accompanyin drawin and table, when a charge which is

selecbvely and successively to the windin a travelling wave is pro uced leading to the toner particles being attracteT:n the appropriate direction and at a desired speed along the interior of the tube.

more positive or negative than t % at whic fi the toner p...