Patent ID: 6535708
Filing Date: 2003-03-18
Classification: G03G

Abstract:
A developing device comprising:four developing units for supplying developing agents of respective colors on latent image of respective colors formed on an image carrier, so as to develop the latent images on the basis of color-separated 4-color image signals; and a contact-enabling mechanism, having four cams for bringing the four respective developing units into contact with the image carrier, one driving source for rotating the four cams and one clutch for transmitting a driving force from the driving source to the four cams so as to rotate these cams at the same time by an angle of 72 degrees, said contact-enabling mechanism selectively bringing one of the four developing units in contact with the image carrier each time the clutch is set on; wherein the contact-enabling mechanism serves to bring said one of the four developing units into contact with the image carrier before forming the latent image of the respective color on the image carrier.