ATBECHDEDKESFRGBGRITLILUNLSEMCPTIESILTLVFIROMKCYAL..............................RDIM360 (Ver 1.5 21 Nov 2005) - 1100000/00898206EUROPEAN PATENT APPLICATIONA319990317EP98202689.019980808enenen97202551 19970820EP19990317199911199902241999086 6G 03G 9/113 AdeMethode zur Beschichtung von Trägerteilchen in elektrostatischen EntwicklernenA method for coating carrier particles for use in electrostatic developersfrProcédé pour enrober des particules porteuses pour développateurs électrostatiquesAGFA-GEVAERT N.V.00200390GN 97108Septestraat 272640 MortselBEVoets, Raphaelc/o Agfa-Gevaert N.V., IIE 3800, Septestraat 272640 MortselBETavernier, Serge, c/o Agfa-Gevaert N.V.PRO/IIE 3800, Septestraat 272640 MortselBEDelen, Gerrit, c/o Agfa-Gevaert N.V.PRO/IIE 3800, Septestraat 272640 MortselBEBellinghausen, RainerAhornstrasse 1229699 BomlitzDEATBECHCYDEDKESFIFRGBGRIEITLILUMCNLPTSEALLTLVMKROSI19990317199911

A method for coating carrier particles for use in electrostatic developers is provided comprising the steps of :

bringing the carrier particles to be coated in a vessel equipped with means for agitating the carrier particles, so that the carrier particles occupy less than 85 % by volume of the vessel, and the agitation of the carrier particles is described by a Froude number between 0.2 and 20,
adding a solution containing between 6 and 60 % by weight with respect to the total volume of the solution of chemical compounds for coating the carrier particles in a solvent with a boiling point of A °C to the vessel at such a rate that, at any time, the solvent is present in an amount lower than 1.25 10^-4 ml per cm² of surface of the carrier particles to be coated ,
keeping the carrier particles in the vessel at a temperature of at most (A + 10) °C, and
continuously evacuating the solvent.