Patents Assigned to Ricoh UK Products Ltd.
  • Patent number: 7498114
    Abstract: A toner manufacturing process, includes: melting a kneaded composition, to thereby obtain a melted composition; and spraying the melted composition with a high pressure gas, to thereby form a fine particle. The kneaded composition is selected from the group consisting of the following <1>, <2> and <3>: <1> a first kneaded composition including a binder resin, a colorant, and a charge controlling agent, <2> a second kneaded composition including a binder resin, a colorant, a charge controlling agent, and a releasing agent, and <3> a third kneaded composition including a binder resin, a magnetic agent, a charge controlling agent, and a releasing agent.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: March 3, 2009
    Assignees: Ricoh Company, Ltd., Ricoh UK Products Ltd.
    Inventors: Nobuyasu Makino, Fumitoshi Murakami, Colin Weaver, David Roberts, Tsutomu Kagawa