Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

METHOD OF CONTROLLING DEVELOPER CHARGING RATE

IP.com Disclosure Number: IPCOM000022803D
Original Publication Date: 1976-Feb-29
Included in the Prior Art Database: 2004-Mar-26
Document File: 2 page(s) / 221K

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to a method of controlling developer charging rate comprising varying the amount of charge control agent or agents added to the carrier or carrier coating of a developer of the type used to develop electro- static latent images. Any suitable organic or inorganic finely-divided particulate material may be employed as the charge control agent, preferably those materials having a volume resistivity of less than about 1010 ohm centimeters at 23°C. Typical charge control agents useful for the method of controlling developer charging rate are described in U.S. Patent 3,752,666,

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 97% of the total text.

Page 1 of 2

XEROX DiSCLOSURE JOURNAL

METHOD OF CONTROLLING Proposed Classification
DEVELOPER CHARGING RATE U.S. Cl, 252/62,1
Meurig W. Williams mt. Cl. G03g 9/00

This disclosure relates to a method of controlling developer
charging rate comprising varying the amount of charge
control agent or agents added to the carrier or carrier
coating of a developer of the type used to develop electro-
static latent images. Any suitable organic or inorganic
finely-divided particulate material may be employed as the
charge control agent, preferably those materials having a
volume resistivity of less than about 1010 ohm centimeters
at 23°C. Typical charge control agents useful for the
method of controlling developer charging rate are described
in U.S. Patent 3,752,666,

By this method, for any given toner, developer charging
rate can be controlled by varying the carrier conductivity
of two-component developer systems, Exemplary of this
method is the introduction of carbon black into the carrier
coating polymer in controlled amounts to attain the desired
control of developer charging rate, and for a series of
methyl terpolymer (MIT) coated carriers containing carbon
black, total blowoff tribo charge increases exponentially
with tumbling time in each case, and the charging rate
constant increases systematically with the carbon black
loading,

Volume 1 Number 2 February 1976 69

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

Page 2 of 2

70 XEROX DISCLOSURE JOURNAL

Volume 1 Number 2 February 1976

[This page c...