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A COMPACT SYSTEM FOR CROSSMIXING, LONGITUDINAL MIXING AND TRIBO-GENERATION

IP.com Disclosure Number: IPCOM000023704D
Original Publication Date: 1978-Dec-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 335K

Publishing Venue

Xerox Disclosure Journal

Abstract

The figure shows a compact xerographic developer system in which the principal mixing mechanism is shear. Developer is introduced at location l- Crossmixing is performed by the two helically magnetized rollers 2 and 3, These rollers may be operated at synchronous or differential speed. Also, the rotational sense may be varied to suit the direction of approach of input developer stream, Preferably, the distan-eh8d-between these two rollers is slightly less than 2he - where h is the helical brush thickness and Ro is the radius of the roller, This requirement is necessary but not sufficient for triboelectrif-ication, Developer that has been crossmixed by rollers 2 and 3 falls into the region between the two differential speed

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

LONGITUDINAL MIXING AND TRIBO~
GENERATION
Isaiah M, Blankson

Proposed Classification
U,S, Cl, 118/417
mt. CL B05c 3/00

The figure shows a compact xerographic developer system in
which the principal mixing mechanism is shear. Developer is
introduced at location l~

Crossmixing is performed by the two helically magnetized
rollers 2 and 3, These rollers may be operated at synchronous
or differential speed. Also, the rotational sense may be
varied to suit the direction of approach of input developer
stream, Preferably, the distan~eh8d~ between these two
rollers is slightly less than 2he ~ where h is the helical
brush thickness and Ro is the radius of the roller, This
requirement is necessary but not sufficient for triboelectrif~
ication, Developer that has been crossmixed by rollers 2 and
3 falls into the region between the two differential speed

1'

d~

\

Volume 3 Number 6 November/December 1978 403

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

Page 2 of 2

A COMPACT SYSTEM FOR CROSSMIXING, LONGITUDINAL MIXING AND
TRIBO~-GENERATION (Cant d)

offset rollers 4 and 5. These two rollers are arranged so
that the exit developer paths are as shown. That is, a portion
of the developer falls through while the major portion is
carried over the top of roller 5. Preferably, the radius of
roller 5 is at least twice that of roller 4. These two rollers
serve to provide longitudinal mixing and more importantly,
tribo~generation, In order to induce mixing by shear, a
relative...