Browse Prior Art Database

HELICAL CROSSMIXER

IP.com Disclosure Number: IPCOM000022903D
Original Publication Date: 1976-Apr-30
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 234K

Publishing Venue

Xerox Disclosure Journal

Abstract

In a development system wherein a developer containing toner particles and ferromagnetic particles is circulated along a predetermined path to develop latent electrostatic images carried by an imaging surface of an electrostatic processor as the imaging surface moves through a develop~ ment zone, there is a crossmixer 11 for magnetically mixing and blending the developer. To that end, the crossmixer 11 comprises a pair of magnetic augers 12 and 13 which are mounted in a hopper 14 to extend laterally of the developer path, preferably on the down stream side of the develop-S ment zone. Helically configured, stationary magnetic fields emanate from the augers 12 and 13 which, in turn, include rotatably driven sleeves 15 and 16, respectively, whereby the developer intercepted by the hopper 14 tends to be translated in opposite lateral directions under the influence of those fields. The magnetic fields for the augers 12 and 13 may be generated (as shown) by physically distinct, helical arrangements 17 and 18, respectively, of permanent magnetics. Or, those fields may be created by impressing helical magnetic pole patterns on, say, barium ferrite cores.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

HELICAL CROSSMIXER

Ralph R. Sharp

Proposed Classification
U.S. Cl, 96/66DP
Int, Cl. G03c 5/30

In a development system wherein a developer containing
toner particles and ferromagnetic particles is circulated
along a predetermined path to develop latent electrostatic
images carried by an imaging surface of an electrostatic
processor as the imaging surface moves through a develop~
ment zone, there is a crossmixer 11 for magnetically mixing
and blending the developer. To that end, the crossmixer 11

comprises a pair of magnetic augers 12 and 13 which are
mounted in a hopper 14 to extend laterally of the developer
path, preferably on the down stream side of the develop-S
ment zone. Helically configured, stationary magnetic
fields emanate from the augers 12 and 13 which, in turn,
include rotatably driven sleeves 15 and 16, respectively,
whereby the developer intercepted by the hopper 14 tends to
be translated in opposite lateral directions under the
influence of those fields. The magnetic fields for the
augers 12 and 13 may be generated (as shown) by physically
distinct, helical arrangements 17 and 18, respectively, of

permanent magnetics. Or, those fields may be created by
impressing helical magnetic pole patterns on, say, barium
ferrite cores.

Volume 1 Number 4 April 1976 15

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Page 2 of 2

16 XEROX DISCLOSURE JOURNAL

Volume 1 Number 4 April 1976

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