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DEVELOPER/CLEANER FOR MAGNETIC TONER WITH ENHANCED PERFORMANCE

IP.com Disclosure Number: IPCOM000024863D
Original Publication Date: 1982-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 74K

Publishing Venue

Xerox Disclosure Journal

Abstract

One means of reducing the cost of copiers is to combine functions. Simultaneous cleaning and development using a bias magnetic brush can be considered to be an example of function combination and elimination. Similarly, one could envisage simultaneous cleaning and development with single component magnetic toner.

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,EROX DISCLOSURE JOURNAL

DEVELOPER/CLEANER FOR MAGNETIC Proposed Classification TONER WITH ENHANCED PERFORMANCE
C1. U.S. Donald A. Seanor 430/125

Int. CI. G03g 21/00

DEVELOPMENT

CLEANING ZONE ZONE

One means of reducing the cost of copiers is to combine functions. Simultaneous cleaning and development using a bias magnetic brush can be considered to be an example of function combination and elimination. Similarly, one could envisage simultaneous cleaning and development with single component magnetic toner.

The requirements for development and cleaning can be expressed by development rate (dd/dt) and scavenging rate (ds/dt) equations.

- 1

- dd = dt RD CkQ/M) ED - FC]

- ds dt

= RS M'[(Q/M+ED - FC + FJ

Volume 7 Number 3 May/June 1982 211

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

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DEVELOPER/CLEANER FOR MAGNETIC TONER WITH ENHANCED PERFOR- MANCE (Cont'd)

Where:

m

C

(Q/M) :

Fi

Mi :

(Q/MI) :

 P F

developed mass per unit area

toner mass per unit area on the brush

charge of toner on brush surface

development field

magnetic force on toner

residual mass per unit area

charge of residual toner

adhesion force of toner to P/R

rate constants

In order to have efficient development FC should be low. However, for efficient cleaning FC should be high, an apparent contradiction.

FC to a first approximation will be given by

2 F~=K u 1 BR~B

Li)

Where K will include a field intensification term. Ideally, it would be desirable to create the situation where the mag...