利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

48 条记录 (耗时 0.037 秒)

    Magnetic carrier particles
    41.
    发明授权
    Magnetic carrier particles 有权
    磁性载体颗粒

    公开(公告)号：US06228549B1

    公开(公告)日：2001-05-08

    申请号：US09572989

    申请日：2000-05-17

    申请人： Patrick M. Lambert ,  William K. Goebel

    发明人： Patrick M. Lambert ,  William K. Goebel

    IPC分类号： G03G9107

    CPC分类号： G03G9/1139 ,  G03G9/107 ,  G03G9/1075 ,  G03G9/1131

    摘要： Conductive hard magnetic carrier particles are disclosed which are useful for development of electrostatic latent images. The carrier particles comprise a core of a hard magnetic material, preferably a hard magnetic ferrite such as strontium ferrite, which has a metal oxide composition disposed on the outer surface of the core. The metal oxide composition comprises a layer of an oxide of at least one metal, and in some embodiments, the metal oxide composition may be represented by the formula MOn/2 where M is at least one multi-valent metal represented by Mn+ where n is an integer of at least 4. Also disclosed are carrier particles having the foregoing structure wherein the outer surface of the core further defines a transition zone which extends into the core of hard magnetic ferrite, wherein the ferrite crystal structure within the transition zone is doped with multi-valent metal ions of the formula Mn+, where n is an integer of at least 4. The carrier particles may be used in making single- and two-component developers for use development of electrostatic latent image patterns in an electrographic process. Also disclosed are methods for using such carrier particles in an electrographic process such that the speed and imaging of the process is improved.

    摘要翻译： 公开了用于静电潜像显影的导电硬磁性载体颗粒。 载体颗粒包括硬磁材料的芯，优选铁氧体如铁氧体的硬磁铁氧体，其具有设置在芯的外表面上的金属氧化物组合物。 金属氧化物组合物包含至少一种金属的氧化物层，并且在一些实施方案中，金属氧化物组合物可以由式MOn / 2表示，其中M是由Mn +表示的至少一种多价金属，其中n是 还公开了具有上述结构的载体颗粒，其中芯的外表面还限定延伸到硬磁铁氧体芯中的过渡区，其中过渡区内的铁素体晶体结构掺杂有 式Mn +的多价金属离子，其中n是至少为4的整数。载体颗粒可以用于制备单组分和双组分显影剂，用于在电印过程中显影静电潜像图案。 还公开了在电摄影过程中使用这种载体颗粒的方法，使得改善了该方法的速度和成像。