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COMPOSITE DEVELOPER PARTICLES

IP.com Disclosure Number: IPCOM000023626D
Original Publication Date: 1978-Aug-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 313K

Publishing Venue

Xerox Disclosure Journal

Abstract

The drawings depict a composite particle for utilization as a developer material in a development system of an electrophoto-graphic printing machine, Composite particle 62 has a conduc-tive particle 62a with a positive polarity relative to insulating particle 62b, This results in triboelectric pairing of the particles, After the particles have been triboelectrically paired, they are fused to one another, The resultant particle 62 is elongated in shape and has an insulating portion 62b and a conductive portion 62a. Con-ductive portion 62a and insulating portion 62b may be magnetic or non-magnetic depending upon the application therefore Composite particle 62 is substantially symmetrical with conductive portion 62a being approximately the same size as insulating portion 62b.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

COMPOSITE DEVELOPER PARTICLES Proposed Classification
L.F. Bean u.s. ci, 427/212
R,L, Miller mt. Ci, B05d 7/00

~62~

62b 62o.

F/G./ (c)

F/Gd ~)

The drawings depict a composite particle for utilization as a
developer material in a development system of an electrophoto-~
graphic printing machine, Composite particle 62 has a conduc~
tive particle 62a with a positive polarity relative to
insulating particle 62b, This results in triboelectric
pairing of the particles, After the particles have been
triboelectrically paired, they are fused to one another, The
resultant particle 62 is elongated in shape and has an
insulating portion 62b and a conductive portion 62a. Con~
ductive portion 62a and insulating portion 62b may be magnetic
or non~magnetic depending upon the application therefore
Composite particle 62 is substantially symmetrical with
conductive portion 62a being approximately the same size as
insulating portion 62b.

,1

FiG. / (b)

Volume 3 Number 4 July/August 1978 275

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

Page 2 of 2

COMPOSITE DEVELOPER PARTICLES (Cont~d)

As shown in Figure 1 (b) , a pair of conductive particles 62a
are attracted triboelectrically to one insulating particle
62b~ The negative charge of the insulating particle 62b is
sufficient to attract two positively charged conductive
particles. After the particles have been triboelectrically
paired, they are fused to one another forming a composite
particle. Composite particle 62 is now...