Image forming apparatus transfer unit with toner layer charge-to-thickness ratio
AssigneeOki Data Corporation
InventorTakuya Goto
Life of this patent
Estimating the term…
Abstract
A image forming apparatus includes a photosensitive body as an image bearing member having a surface layer. The surface layer includes a charge transport layer having the thickness from 10 μm to 20 μm. An exposing unit exposes the surface layer to the light to form latent image, and has a resolution greater than 600 dpi. A developing unit develops the latent image with toner so that a toner layer is formed on the photosensitive body. The toner layer formed on the photosensitive body includes two or three layers of toner particles. The electric charge Q (μC/g) of the toner layer per unit weight, the average thickness t (μm) of the toner layer, and the gap d (μm) between the smallest dots satisfy the following relationship: 50.4/d≦|Q/t|≦10.0.
Claims4
An image forming apparatus comprising:
- an image bearing member having a surface layer, said surface layer including a charge transport layer, said charge transport layer having a thickness from 10 μm to 20 μm;
- an exposing unit that exposes said surface layer of said image bearing member to light so as to form a latent image, said exposing unit having a resolution greater than or equal to 600 dpi;
- a developing unit that develops said latent image on said image bearing member to form a toner layer that constitutes a toner image, and
- a transfer unit whose transfer voltage is in the range from 500 V to 2500 V, said transfer unit transferring said toner image to a media,
- wherein an electric charge Q (μC/g) of said toner layer per unit weight, an average thickness t (μm) of said toner layer, and a gap d (μm) between smallest dots corresponding to said resolution of said exposing unit satisfy the following relationship:
- 50.4/d≦|Q/t|≦10.0.
An image forming apparatus comprising:
- an image bearing member having a surface layer, said surface including a change transport layer, said charge transport layer having a thickness from 10 μm to 20 μm;
- an exposing unit that exposes said surface layer of said image bearing member to light so as to form a latent image, said exposing unit having a resolution greater than or equal to 600 dpi;
- a developing unit that develops said latent image on said image bearing member to form a toner layer that constitutes a toner image;
- and
- a transfer unit whose transfer voltage is in the range from 500 V to 2500 V, said transfer unit transferring said toner image to a media,
- wherein said toner layer includes single-layered toner particles, and an electric charge Q (μC/g) of said toner layer per unit weight, an average thickness t (μm) of said toner layer, and a gap d (μm) between smallest dots corresponding to said resolution of said exposing unit satisfy the following relationship:
- 42.0/d≦|Q/t|≦18.0.
Dependencies are inferred from the claim text.