Toners and developers
AssigneeXerox Corporation
InventorsScott M. Silence, William H. Hollenbaugh JR., Thomas R. Pickering, Amy L. Stamp, Roger N. Ciccarelli, Denise R. Bayley, Samuel Kaplan, Alexander N. Klymachyov, John S. Walters, Padam K. Angra
Life of this patent
Estimating the term…
Abstract
A toner comprised of resin, colorant and calcium stearate.
Claims70
A toner comprising at least one binder in an optional amount of from about 85 to about 99 percent by weight, at least one colorant in an optional amount of from about 0.5 to about 15 percent by weight, and calcium stearate in an optional amount of from about 0.05 to about 2 percent by weight and wherein following triboelectric contact with carrier particles, the toner has a charge Q measured in femtocoulombs per particle diameter D measured in microns (Q/D) of from about −0.1 to about −1.0 fC/μm with a variation during development of from about 0 to about 0.25 fC/μm and wherein the distribution is substantially unimodal and possesses a peak width of from about 0.1 fC/μm to about 0.5 fC/μm and the toner possesses a charge to mass M, as measured in grams, ratio (Q/M) of from about −25 to about −70 μC/gram with variation of Q/M during development of from about 0 to about 15 μC/gram.
A method comprising
- forming different color developers by mixing a carrier with a toner comprising toner particles comprised of polymer, colorant, and calcium stearate, wherein following triboelectric contact with carrier particles, the toner has a charge per particle diameter (Q/D) of from about −0.1 to about −1 fC/μm with a variation during development of from about 0 to about 0.25 fC/μm and the distribution is substantially unimodal and possesses a peak width of less than about 0.5 fC/μm, and the toner has a triboelectric charge of from about −25 to about −70 μC/gram with a variation during development of from about 0 to about 15 μC/gram;
- forming a latent image upon a photoreceptor surface, developing any portion of the latent image requiring magenta color with a developer containing a magenta color toner;
- developing any portion of the latent image requiring yellow color with a developer containing a yellow color toner;
- developing any portion of the latent image requiring cyan color with a developer containing a cyan color toner;
- developing any portion of the latent image requiring black color with a developer containing a black color toner;
- and
- transferring the developed latent images from the photoreceptor surface to an image receiving substrate.
A toner comprised of resin, colorant and calcium stearate.
A composition comprised of a polymer, a colorant, and calcium stearate, and wherein following triboelectric contact with carrier particles, the toner has a charge per particle diameter (Q/D) of from about −0.005 to about −2 Fc/μm, and wherein the toner possesses a charge to mass ratio (Q/M) of from about −20 to about −75 μC/gram.
A toner comprising a binder polymer, colorant, or mixtures of colorants, and calcium stearate, and wherein following triboelectric contact with carrier particles, the toner has a charge Q measured in femtocoulombs per particle diameter D measured in microns (Q/D) of from about −0.1 to about −1 fC/μm with a variation during development of from about 0 to about 0.25 fC/μm, and wherein the toner distribution is substantially unimodal and possesses a peak width of from about 0.1 fC/μm to about 0.5 fC/μm, and the toner possesses a charge to mass M, as measured in grams, ratio (Q/M) of from about −25 to about −70 μC/gram with variation of Q/M during development of from about 0 to about 15 μC/gram.
A process for extending the life of a device component in a copying and printing apparatus wherein there is selected for development a toner comprised of polymer, colorant, and a calcium stearate additive.
Dependencies are inferred from the claim text.