Original Publication Date: 1978-Feb-28
Included in the Prior Art Database: 2004-Mar-31
Xerox Disclosure Journal
A development arrangement for developing latent electrostatic images formed on a photosensitive imaging member 2. The arrangement includes a plurality of magnetic brushes 3-5 formed conventionally of rotatable non-magnetic sleeves 6-8 with which are located magnetic field defining means (not shown) . Each magnetic brush is supplied with fresh developer material from a developer supply sump 11 via individual developer transport tubes 12-14. A plurality of developer return tubes 15-17 serve to transport the denuded developer to a toner developer blending station 20 at which the spent developer is replenished with toner and transported via a tube 21 to the common developer supply sump 11. Independent feed to each magnetic brush unit prevents downstream rolls from becoming toner poor in relation to upstream rolls, a common problem in developer systems in which developer is passed from roll to roll.