Original Publication Date: 1976-Apr-30
Included in the Prior Art Database: 2004-Mar-27
Xerox Disclosure Journal
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.