Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – To produce color reproduction
Reexamination Certificate
2007-12-11
2007-12-11
RoDee, Christopher D. (Department: 1756)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
To produce color reproduction
C430S045510, C430S047200
Reexamination Certificate
active
11505372
ABSTRACT:
The present invention provides toners of different colors in which coloring agents of at least four unicolors are internally added to, respectively, and hydrophobic silica particles and metallic soap particles are externally added to toner mother particles, wherein color superposition of the toners is conducted during development of latent images on a latent image carrier or during transfer to a recording medium after the development, being characterized in that the difference (absolute value) between the work functions of two of said toners is 0.02 eV or more, the color superposition is conducted with the toners sequentially from the toner having the largest work function in descending order of work function of the toners, and the difference (absolute value) between the work function of the toner mother particles and the work function of the metallic soap particles is 0.15 eV or less, thereby improving the transfer efficiency, enabling the extreme reduction in amount of waste toner, and enabling the reduction in apparatus size, and provides a production method of the toners and an image forming apparatus employing the toners.
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English language machine translation of JP 06-011898 (1994).
Diamond, Arthur S. & David Weiss (eds.) Handbook of Imaging Materials. New York: Marcel-Dekker, Inc., (Nov. 2001) pp. 145-168.
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