Title:
TWO-COLOR IMAGE FORMING DEVICE
Document Type and Number:
Japanese Patent JPH01123266
Kind Code:
A
Abstract:
PURPOSE:To obtain an inexpensive two-color image forming device which is simplified in constitution and is small in size by providing a latent image forming means which is capable of irradiating light at two stages of exposures. CONSTITUTION:Image exposing is executed at the 1st exposure E1 and the 2nd exposure E2 by an LED array, by which the 1st electrostatic latent image I1 of the potential VE1 corresponding to the 1st exposure E1 and the 2nd electrostatic latent image I2 of the potential VE2 corresponding to the 2nd exposure E2 are formed. A black toner 4a is stuck by the effect of the first developing bias VB1 to the 1st electrostatic latent image I1 part from a black developing device 4 in a 1st developing process. A blue toner 5a is stuck to the 2nd electrostatic latent image I2 part from a blue developing device in a 2nd developing process. The blue toner 5a is stuck to the 1st electrostatic latent image I1 part as well at this time. The image part A consisting of the black toner 4a and the blue toner 5a and the image part B consisting of only the blue toner 5a are formed when these toners are transferred to recording paper 6.
Inventors:
ITO SHINICHI
SATO HIROAKI
TSUJI KENZO
SATO HIROAKI
TSUJI KENZO
Application Number:
JP28286787A
Publication Date:
May 16, 1989
Filing Date:
November 09, 1987
Export Citation:
Assignee:
OKI ELECTRIC IND CO LTD
International Classes:
G03G15/01; (IPC1-7): G03G15/01
Attorney, Agent or Firm:
Maeda Minoru