Image forming method
AssigneeCanon Kabushiki Kaisha
InventorsKenichi Takeda, Yuji Sakemi
Life of this patent
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Abstract
There is provided an image forming method, including: gradation-processing an image signal based on a halftone image to output a pulse-width-modulated signal; forming a latent image on a latent image-bearing member on the basis of the pulse-width-modulated signal; and developing the latent image with a developer comprising a toner to reproduce the halftone image; wherein the toner has a volume average particle size of M and comprises toner particles having a particle size of r; and has a volume-basis distribution such that it comprises 90% by volume or more of toner particles satisfying M2<r<3/2M and comprises 99% by volume or more of toner particles satisfying 0<r<2M.
Claims22
An image forming method, comprising:
- gradation-processing an image signal based on a halftone image to output a pulse-width-modulated signal;
- forming an electrostatic latent image on a latent image-bearing member by using a laser beam providing a spot in the form of an ellipse having a shorter axis in its main scale direction and a longer axis in its sub-scan direction on the basis of the pulse-width-modulated signal;
- and
- developing the electrostatic latent image with a two-component type developer comprising a toner and a carrier to reproduce the halftone image;
- wherein said toner has a volume-average particle size (M) of 9 microns or below and comprises toner particles having a particle size of r;
- and has a volume-basis distribution such that it comprises 90% by volume or more of toner particles satisfying M/2<r<3M/2 and comprises 99% by volume or more of tone particles satisfying 0<r<2M.
Dependencies are inferred from the claim text.