Patent ID: 6365310
Filing Date: 2002-04-02
Classification: G03G

Abstract:
A method of developing electrophotographic images in color in a copying machine having a photosensitive medium comprising the steps of:preparing a plurality of developers with each said developer having a different visually appearing color defined by a unique band of different wavelengths by providing a plurality of toners each corresponding to one of said plurality of developer colors, and providing each toner with an amount of each of two types of carrier particles of the same electrical charge polarity with one of the two types of carrier particles having a higher electrical charge level than the other type of carrier particles, to make the material of each color developer have substantially the same electrical charge band in magnitude and width with the band being narrower than that formed by adding only a single type carrier particle having only one electrical charge level to each of said developers, exposing the photosensitive medium to the image to be developed, and applying each said developer of different colors to said medium under substantially the same copying machine operating conditions.