Patent ID: 7704654
Filing Date: 2010-04-27
Classification: G03G

Abstract:
1. An image forming method, comprising: forming a latent image on an image carrier; developing the latent image with a toner to form a toner image on the image carrier; and transferring the toner image from the image carrier to an image receiving material; wherein: ultrasonic vibrations are applied during the transferring of the toner image, said ultrasonic vibrations being conducted from an ultrasonic wave apparatus via an ultrasonic vibration conductive member provided between the ultrasonic wave apparatus and the image carrier; the toner has particle diameter (Dp50) at 50 percent accumulation in a number-based particle size distribution between about 3.0 and about 5.0 μm, and comprises a release agent having a melting point between about 40 and about 75° C., said toner being formed by coagulating a resin particle; the latent image corresponds to a black image; the toner is a black toner; the toner image is a black toner image; the method further comprising: forming a latent image for a magenta image, a latent image for a cyan image, and a latent image for a yellow image, and developing the latent image for the magenta image with a magenta toner, the latent image for the cyan image with a cyan toner, and the latent image for the yellow image with an yellow toner to form a magenta, cyan and yellow toner images; wherein: the yellow, cyan, magenta and black toner satisfy the following formulas: in Formulas (1)-(4), the maximum value and the minimum value of K refer respectively to the maximum value and the minimum value among average values (Ky, Km, Kc, and Kb) of the shape factor of each of the yellow toner, magenta toner, cyan toner, and black toner; the maximum value and the minimum value of Kσ refer respectively to the maximum value and the minimum value among the variation coefficients (Kσy, Kσm, Kσc, and Kσb) of the shape factor of each of the color toners; the maximum value and the minimum value of D refer respectively to the maximum value and the minimum value among Dp50 (Dy, Dm, Dc, and Db) of each of the colors; and the maximum value and the minimum value of Dσ refer respectively to the maximum value and the minimum value among the number variation coefficients (Dσy, Dσm, Dσc, and Dσb) in the number particle size distribution of each of the color toners.