ApplicationNo. 05/701113 filed on 06/30/1976
US Classes:430/120, Dry powder developing399/267Magnetic brush
ExaminersPrimary: Martin, Roland E. Jr.
Attorney, Agent or Firm
International ClassG03G 15/09 (20060101)
AbstractA method using a one-component developer of magnetically attractable, electrically insulating toner particles for developing an electrical potential pattern at a surface. Electrical means and an electrode-developer transport means are provided with the electrode-developer transport means positioned relative to the electrical potential pattern for establishing a unidirectional electrical difference between the potential pattern and an electrically conductive portion provided by the electrode-developer transport means. Rapid turbulent physical mixing action of the toner is provided for producing sufficient repetitive electrical contact of the toner with the electrically conductive portion to cause electrical charge of a predetermined polarity to be injected onto the toner particles. A charge level is so produced, which is sufficient to cause such charged toner particles to be deposited on the potential pattern bearing surface in accordance with the potential pattern.