Image forming apparatus
View Patent ↗In the image forming apparatus by: visualizing an electrostatic latent image formed on an electrostatic charge carrying member; transferring a toner image, which is thus visualized, to a recording medium, or to a recording medium through an intermediate transfer material; and fixing the toner image, which is thus transferred to the recording medium, to obtain a recorded image, the toner includes at least a fixing resin, a colorant, a releasing agent, and an external additive, the toner has an average particle diameter in a range of from 4 to 12 μm and including no particle having a diameter of 45 μm or more, a ratio of a toner adhesion amount in a character part to a toner adhesion amount in a solid image part upon printing is more than 0.5 and less than 4, and the toner adhesion amount in a character part is 1.6 mg/cm 2 or less.
1. An image forming apparatus comprising:
an electrostatic charge carrying member on which an electrostatic latent image is formed to be visualized;
a transferring member transferring a toner image to be visualized to a recording medium or to the recording medium through an intermediate transfer material;
a fixing member fixing the toner image, which is transferred to the recording medium, to obtain a recorded image; and
a toner obtained by pulverization, which includes at least a fixing resin, a colorant, a releasing agent, and an external additive,
wherein the toner has an average particle diameter in a range of from 4 to 12 μm and including no particle having a diameter of 45 μm or more, and
wherein a ratio of a toner adhesion amount in a character part to a toner adhesion amount in a solid image part upon printing is more than 0.5 and less than 4, where the toner adhesion amount in a character part is 1.6 mg/cm 2 or less.
2. An image forming apparatus comprising:
an electrostatic charge carrying member on which an electrostatic latent image is formed to be visualized;
a transferring member transferring a toner image to be visualized to a recording medium or to the recording medium through an intermediate transfer material; and
a fixing member fixing the toner image, which is transferred to the recording medium, to obtain a recorded image,
wherein the toner image is formed with a two component developer including:
a toner having at least a binder resin, a colorant a releasing agent, and an external additive, and having an average particle diameter in a range of from 4 to 12 μm and including no particle having a diameter of 45 μm or more; and
a magnetic carrier, and
wherein a ratio of a toner adhesion amount in a character part to a toner adhesion amount In a solid image part upon printing is more than 0.5 and less than 4, where the toner adhesion amount in a character part is 1.6 mg/cm 2 or less.
3. The image forming apparatus according to claim 1 , wherein the toner comprises a color toner.
4. The image forming apparatus according to claim 2 , wherein the toner comprises a color toner.
5. The image forming apparatus according to claim 2 , wherein the magnetic carrier comprises one compound selected from the group consisting of magnetite, spinel ferrite, and magnetoplumbite ferrite.
6. The image forming apparatus according to claim 2 , wherein the magnetic carrier comprises one compound selected from the group consisting of gamma iron oxide and barium ferrite.
7. The image forming apparatus according to claim 2 , wherein the surface of the magnetic carrier is coated with at least one compound selected from the group consisting of a silicone resin, an acrylic resin, an epoxy resin, and a fluorine resin.
8. A toner for an image forming apparatus, comprising:
a fixing resin;
a colorant;
a releasing agent; and
an external additive,
wherein the toner has an average particle diameter in a range of from 4 to 12 μm and including no particle having a diameter of 45 μm or more,
wherein a ratio of a toner adhesion amount in a character part to a toner adhesion amount in a solid image part upon printing is more than 0.5 and less than 4, where the toner adhesion amount in a character part is 1.6 mg/cm 2 or less, and
wherein the toner is obtained by pulverization.
9. The toner according to claim 8 , wherein a proportion of particles having a diameter of 4 μm or less included in the toner is 15% by number or less.
10. The toner according to claim 8 , wherein a proportion of particles having a diameter of 4 μm or less included in the toner is 10% by number or less.
11. The image forming apparatus according to claim 4 , wherein the toner comprises a magnetic material including at least one compound selected from the group consisting of iron oxide, a metal, and an alloy of the metals.
12. The image forming apparatus according to claim 11 , wherein the magnetic material has an average particle diameter of 2 μm or less.
13. The image forming apparatus according to claim 11 , wherein the magnetic material has an average particle diameter from 0.1 to 0.5 μm.
14. The image forming apparatus according to claim 1 , wherein a proportion of particles having a diameter of 4 μm or less included in the toner is 15% by number or less.
15. The image farming apparatus according to claim 1 , wherein a proportion of particles having a diameter of 4 μm or less included in the toner is 10% by number or less.
16. The image forming apparatus according to claim 2 , wherein a proportion of particles having a diameter of 4 μm or less included in the toner is 15% by number or less.
17. The image forming apparatus according to claim 2 , wherein a proportion of particles having a diameter of 4 μm or less included in the toner is 10% by number or less.
18. The image forming apparatus according to claim 2 , wherein the toner comprises a magnetic material including at feast one compound selected from the group consisting of iron oxide, a metal, and an alloy of the metals.
19. The image forming apparatus according to claim 18 , wherein the magnetic material has an average particle diameter of 2 μm or less.
20. The image forming apparatus according to claim 2 , wherein the toner is obtained by pulverization.