Patent ID: 6484004
Filing Date: 2002-11-19
Classification: G03G

Abstract:
An apparatus for efficiently transferring at least two subtractive color toner images simultaneously onto a substrate, said apparatus comprising:a photoreceptor; a transfer charger operably associated with said photoreceptor; said substrate being positioned substantially between said photoreceptor and said transfer charger; a plurality of print stations including a last print station, each of said print stations operably associated with said photoreceptor to form a plurality of color images thereon, each of said print stations including a charger unit, an exposure unit, and a developer unit for applying a respective color toner to said photoreceptor, upon application to said photoreceptor each of said color images consisting of toner having a charge-to-mass ratio at an initial charge-to-mass ratio, each of said charger units charging said photoreceptor to substantially the same potential and inducing a saturated charge-to-mass ratio in said toner included in any previously formed ones of said color images, said saturated charge-to-mass ratio being significantly greater than said initial charge-to-mass ratio; and a stabilizing charger unit, substantially conforming said charge-to-mass ratio of said toner included in any previously formed color images before said color images are electrostatically attracted from said photoreceptor to said substrate by operation of said transfer charger.