IMAGE FORMING METHOD, AND ELECTROPHOTOGRAPHIC APPARATUS MAKING USE OF THE IMAGE FORMING METHOD
First Claim
1. An image forming method comprising:
- a charging step of charging a photosensitive member for holding thereon an electrostatic latent image;
an exposure step of forming an electrostatic latent image on the photosensitive member by imagewise exposure;
a developing step of developing the electrostatic latent image with a toner a developing device has, to form a toner image; and
a transfer step of transferring to a transfer material the toner image formed on the surface of the photosensitive member;
wherein the toner has toner particles containing at least a binder resin and a colorant, and inorganic fine powder;
the photosensitive member has on its surface a plurality of depressed portions which are independent of one another, and openings of the depressed portions have an average minor-axis diameter Lpc satisfying the following expression (1);
Dg<
Lpc<
Dt
(1) where Dt represents a weight-average particle diameter of the toner, and Dg represents a maximum number-average particle diameter among number-average particle diameters of one or two or more types of inorganic fine powder constituting the inorganic fine powder; and
the toner has an average circularity of 0.925 or more and 0.995 or less.
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Accused Products
Abstract
An image forming method is disclosed having a charging step, an exposure step, a developing step and a transfer step. This method uses a toner which includes toner particles containing a binder resin and a colorant, and inorganic fine powder, and uses a photosensitive member which has on its surface depressed portions which are independent of one another. The depressed portions have openings having an average minor-axis diameter Lpc satisfying the relationship of Dg<Lpc<Dt (Dt represents the weight-average particle diameter of the toner, and Dg represents the maximum number-average particle diameter among number-average particle diameter(s) of one or two or more types of inorganic fine powder constituting the inorganic fine powder, and the toner has an average circularity of from 0.925 to 0.995.
29 Citations
13 Claims
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1. An image forming method comprising:
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a charging step of charging a photosensitive member for holding thereon an electrostatic latent image;
an exposure step of forming an electrostatic latent image on the photosensitive member by imagewise exposure;
a developing step of developing the electrostatic latent image with a toner a developing device has, to form a toner image; and
a transfer step of transferring to a transfer material the toner image formed on the surface of the photosensitive member;
wherein the toner has toner particles containing at least a binder resin and a colorant, and inorganic fine powder;
the photosensitive member has on its surface a plurality of depressed portions which are independent of one another, and openings of the depressed portions have an average minor-axis diameter Lpc satisfying the following expression (1);
Dg<
Lpc<
Dt
(1)where Dt represents a weight-average particle diameter of the toner, and Dg represents a maximum number-average particle diameter among number-average particle diameters of one or two or more types of inorganic fine powder constituting the inorganic fine powder; and
the toner has an average circularity of 0.925 or more and 0.995 or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification