Abstract
A novel electrophotography “One Drum Color Superimposing Process” has been developed, in which process each color toner image is directly superimposed onto the photoconductor followed by transferring to a plain paper at once. To prevent color cross-contamination during color superposition, a non-contact and mono-component development method is employed in each of three color development units. Insulative toner is triboelectrically charged by a conductive fur brush provided in the development unit, and is made to adhere to a developing roller electrostatically. An elastic rubber blade is provided to form uniform toner flayers of approximately 30 μm thick. The developing roller is set to face the photoconductor keeping with a gap of 150 μm. By applying a bias potential of 800 V, the toner from the developing roller flies for developing latent images. The developed color development method is employed in the “Panasonic FP-C1” digital color copier.
