Patent ID: 6352806
Filing Date: 2002-03-05
Classification: G03G,H04N

Abstract:
A method of forming full-gamut toner images having low toner pile height approximating the â€œlook and feelâ€  of offset lithographic images, the method comprising:(a) converting digital image signals into at least seven bitmap pixels of color separation images comprising black (K), cyan (C), red (R), magenta (M), blue (B), green (G) and yellow (Y); (b) uniformly charging a portion of a single moving image bearing member; (c) imagewise exposing the portion of the single moving image bearing member to a light pattern of a first one of the at least seven bitmaps to form a first color separation latent image having first image areas and first background areas; (d) developing the first image areas of the first color separation latent image using toner particles having a color corresponding to that of the first one of the at least seven bitmaps; (e) uniformly recharging the first image areas and first background areas in the first position of the single moving image bearing member; (f) imagewise exposing the recharged first background areas to a light pattern of a second one of the at least seven bitmaps of pixels of color separation images to form a second color separation latent image having second image areas and second background areas; (g) developing the second image areas of the second color separation latent image using toner particles having a color corresponding to that of the second one of the at least seven bitmaps; (h) repeating steps (e) to (g) in an increasing order for each of the rest of the at least seven bitmaps; and (i) repeating the steps (e) to (g) for the third, fourth, fifth, sixth and at least seventh ones of the at least seven bitmaps, thereby resulting in a full-gamut KCRMBGY toner image that has a relatively high level of image-next-to-image registration and low toner pile height, and thus approximates the â€œlook and feelâ€  of a lithographically produced color image.