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A COLOR DEVELOPMENT SYSTEM

IP.com Disclosure Number: IPCOM000023625D
Original Publication Date: 1978-Aug-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 4 page(s) / 660K

Publishing Venue

Xerox Disclosure Journal

Abstract

A developer unit 30 employed in an electrophotographic print-ing machine arranged to produce color copies is depicted in the figure. As shown therein, housing 56 includes chamber 58 for storing a supply of developer mix, Toner particles are periodically added to the developer mix from toner cartridges 60, 62 and 64. Each of the toner cartridges is a hollow cylin-drical member extending the length of housing 56 with perfor-ations in the lower portion thereof, The toner particles are dispensed from the cartridge during oscillation about the longitudinal axis thereof, Toner cartridge 60 comprises cyan

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Page 1 of 4

XEROX DISCLOSURE JOURNAL

A COLOR DEVELOPMENT SYSTEM
L.J~ Fraser
A~J~Liebman

Proposed Classification
U~S. Cl~ 427/145
Int~ Cl~ E41m 5/16

A developer unit 30 employed in an electrophotographic print~
ing machine arranged to produce color copies is depicted in
the figure. As shown therein, housing 56 includes chamber 58
for storing a supply of developer mix, Toner particles are
periodically added to the developer mix from toner cartridges
60, 62 and 64. Each of the toner cartridges is a hollow cylin-
drical member extending the length of housing 56 with perfor~
ations in the lower portion thereof, The toner particles are
dispensed from the cartridge during oscillation about the
longitudinal axis thereof, Toner cartridge 60 comprises cyan

58

Volume 3 Number 4 July/August 1978 269

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

Page 2 of 4

A COLOR DEVELOPMENT SYSTEM (Cont' d)

toner particles, toner cartridge 62 has magenta toner parti-
cles therein, and toner cartridge 64 has yellow toner
particles therein. The ratio of the toner particles dispensed
from each of the cartridges is regulated so that the resultant
toner particle mix within the developer material is at a pre-
selected ratio forming a pre-selected color. Auger 66 mixes
the toner particles dispensed from the cartridges with the
unused developer material and denuded carrier granules. In
this way, a homogeneous developer mix is obtained. Baffle
plate 68 isolates the transport rollers and developer rollers
from sump 58. Transport rollers 70 and 72 advance the
developer mix in an upwardly direction to developer rollers
74, 76, 78 and 80. Each of the transport rollers 70 and 72
includes an outer cylinder or tubular member 82 made of a non-
magnitizable material and extending almost the length of
housing 56. Tubular members 82 are mounted for rotation in
housing 56. Disposed within each tubular member 82 is a
magnet 84. Tubular member 82 of transport roller 70 rotates
in the direction of arrow 86. Tubular member 82 of transport
roller 72 rotates in the direction of arrow 88. Four magnetic
brush developer rollers 74, 76, 78 and 80 are mounted for
rotation within chamber 58 of housing 56. The axes of each of
these magnetic brush developer rollers is parallel and adja-
cent to photoconductive surface 12 of belt 10. Each magnetic
brush developer roller comprises an outer cylinder or tubular
member 90 made of a non-magnetizable material and extending
almost the length of housin...