Image forming apparatus and image forming method using overlapping toner images
AssigneeOki Data Corporation
InventorSatoru Murai
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Abstract
An image forming apparatus includes a first toner image forming unit, a second toner image forming unit, and a transfer section. The first toner image forming unit forms a first toner image with use of a first toner. The first toner has a complex viscosity that falls within a range from 625 Pascal-seconds to 3860 Pascal-seconds, both inclusive, at a temperature of 100 degrees centigrade. The second toner image forming unit forms a second toner image with use of a second toner. The transfer section transfers the first toner image onto a print medium, and transfers the second toner image onto the print medium in a region that overlaps a portion or all of a region where the first toner image has been transferred. The print medium includes a polymer compound.
Claims13
An image forming apparatus comprising:
- a first toner image forming unit that forms a first toner image with use of a first toner, the first toner having a complex viscosity that falls within a range from 625 Pascal-seconds to 3860 Pascal-seconds, both inclusive, at a temperature of 100 degrees centigrade;
- a second toner image forming unit that forms a second toner image with use of a second toner;
- and
- a transfer section that transfers the first toner image onto a print medium, and transfers the second toner image onto the print medium in a region that overlaps a portion or all of a region where the first toner image has been transferred, the print medium including a polymer compound,
- wherein the print medium includes a surface having a Bekk smoothness of no lower than 100000 seconds, the surface being a surface onto which each of the first toner image and the second toner image is to be transferred.
An image forming apparatus comprising:
- a first toner image forming unit that forms a first toner image with use of a first toner, the first toner having a complex viscosity that falls within a range from 625 Pascal-seconds to 3860 Pascal-seconds, both inclusive, at a temperature of 100 degrees centigrade;
- a second toner image forming unit that forms a second toner image with use of a second toner;
- and
- a transfer section that transfers the first toner image onto a print medium, and transfers the second toner image onto the print medium so that the second toner image partially or entirely overlaps the first toner image on the print medium,
- wherein the complex viscosity of the first toner at the temperature of 100 degrees centigrade is less than a complex viscosity of the second toner at the temperature of 100 degrees centigrade, and
- wherein a difference between the complex viscosity of the first toner at the temperature of 100 degrees centigrade and the complex viscosity of the second toner at the temperature of 100 degrees centigrade falls within a range from 8745 Pascal-seconds to 11980 Pascal-seconds, both inclusive.
An image forming apparatus comprising:
- a first toner image forming unit that forms a first toner image with use of a first toner, the first toner having a complex viscosity that falls within a range from 625 Pascal-seconds to 3860 Pascal-seconds, both inclusive, at a temperature of 100 degrees centigrade;
- a second toner image forming unit that forms a second toner image with use of a second toner;
- and
- a transfer section that transfers the first toner image onto a print medium, and transfers the second toner image onto the print medium so that the second toner image partially or entirely overlaps the first toner image on the print medium,
- wherein the complex viscosity of the first toner at the temperature of 100 degrees centigrade is less than a complex viscosity of the second toner at the temperature of 100 degrees centigrade, and
- wherein the first toner includes a binder resin, the binder resin having a weight-average molecular weight that falls within a range from 5242 to 18039, both inclusive.
Dependencies are inferred from the claim text.