发明申请
US20090017395A1 TONER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS 有权
调色剂,双组分开发商,开发设备和图像形成设备

  • 专利标题: TONER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS
  • 专利标题(中): 调色剂,双组分开发商,开发设备和图像形成设备
  • 申请号: US12170748
    申请日: 2008-07-10
  • 公开(公告)号: US20090017395A1
    公开(公告)日: 2009-01-15
  • 发明人: Satoru AriyoshiKiyoshi Toizumi
  • 申请人: Satoru AriyoshiKiyoshi Toizumi
  • 优先权: JPP2007-184798 20070713
  • 主分类号: G03G9/08
  • IPC分类号: G03G9/08
TONER, TWO-COMPONENT DEVELOPER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS
摘要:
A toner has columnar particles manufactured through: a kneading step of melt-kneading toner raw materials including at least binder resin, colorant and a release agent to prepare a kneaded product; a spinning step of extruding the kneaded product from orifices disposed at the tip of a spinning nozzle to prepare a fibrous kneaded product; and a pulverizing step of cutting or pulverizing the fibrous kneaded product, the toner matrix particles each having an aspect ratio of 0.5 to 5.0 and a dB/d50 value of 0.5 or above and contain an external additive composed of large particles and small particles having a volume average particle size smaller than that of the large particles, as well as to provide each of the columnar particles with each having 10 or less reentrants whose apertures have a longer length in a minor axis thereof than a radius of the respective large particles.
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