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    • 4. 发明授权
    • Method for coating carrier particles for use in electrostatic developers
    • 用于涂覆用于静电显影剂的载体颗粒的方法
    • US5888692A
    • 1999-03-30
    • US135567
    • 1998-08-18
    • Raphael VoetsSerge TavernierGerrit DelenRainer Bellinghausen
    • Raphael VoetsSerge TavernierGerrit DelenRainer Bellinghausen
    • G03G9/087B01J2/00G03G9/113
    • G03G9/1131G03G9/1136
    • 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 articles 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.degree. C. to the vessel at such a rate that, at any time, the solvent is present in an amount lower than 1.25 10.sup.-4 ml per cm.sup.2 of surface of the carrier particles to be coated,keeping the carrier particles in the vessel at a temperature of at most (A+10).degree. C., andcontinuously evacuating the solvent.
    • 提供了一种用于涂覆用于静电显影剂的载体颗粒的方法,包括以下步骤:将载体颗粒涂布在装有用于搅拌载体颗粒的装置的容器中,使得载体物品占85%(体积) 容器和载体颗粒的搅拌由弗劳德数介于0.2和20之间,相对于用于将载体颗粒涂覆的化合物溶液的总体积加入含有6至60重量%的溶液 沸点为A℃的溶剂以使得在任何时候溶剂的存在量低于每平方厘米待涂覆载体颗粒表面的1.25×10-4毫升, 将载体颗粒保持在至多(A + 10)℃的温度下,并持续抽空溶剂。