Image forming apparatus and image forming method

Patent metadata

Field	Value
Publication number	US-10509339-B2
Application number	US-201815983606-A
Country	US
Kind code	B2
Filing date	May 18, 2018
Priority date	May 31, 2017
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

An image forming apparatus includes an image forming section and a controller. The image forming section selectively forms a first toner image to be printed on transfer paper other than plain paper with use of a toner and forms a second toner image to be printed on the plain paper with use of the toner. The controller controls the image forming section and thereby makes a first area density of the toner in the first toner image and a second area density of the toner in the second toner image differ from each other.

First claim

What is claimed is:

1. An image forming apparatus, comprising:
an image forming section that selectively forms a first toner image to be printed on a first medium with use of a plurality of color toners and forms a second toner image to be printed on a second medium with use of the plurality of color toners, the color toners including a first color toner and a second color toner; and
a controller that controls the image forming section and thereby makes a first area density of the first color toner in the first toner image and a second area density of the first color toner in the second toner image differ from each other, and thereby makes a third area density of the second color toner in the first toner image and a fourth area density of the second color toner in the second toner image substantially equal to each other.

2. The image forming apparatus according to claim 1 , wherein
the controller controls the image forming section and thereby makes the first area density and the second area density differ from each other when: the image forming section forms, on a basis of image data the first toner image at a maximum area density that is allowed to be set for the first color toner; and the image forming section forms, on the basis of the image data, the second toner image at the maximum area density.

3. The image forming apparatus according to claim 1 , wherein
the controller controls the image forming section and thereby makes the first area density and the second area density differ from each other when the image forming section forms a solid pattern of a first color with use of the first color toner.

4. The image forming apparatus according to claim 1 , wherein
the controller controls the image forming section, and thereby sets the first area density when the first color toner is to be attached to an uppermost layer of the first toner image and sets the second area density when the first color toner is to be attached to an uppermost layer of the second toner image.

5. The image forming apparatus according to claim 1 , wherein
the first color toner comprises at least one of a cyan toner or a black toner, and
the controller controls the image forming section and thereby makes the first area density of the first color toner lower than the second area density of the first color toner.

6. The image forming apparatus according to claim 5 , wherein the first color toner includes one of Phthalocyanine Blue or carbon black as a pigment.

7. The image forming apparatus according to claim 1 , wherein
the first medium includes a substrate and an adhesive layer that covers the substrate,
the image forming section forms the first toner image to be printed on the adhesive layer of the first medium and forms the second toner image to be printed on the second medium, and
the controller controls the image forming section and thereby makes the first area density lower than the second area density.

8. The image forming apparatus according to claim 7 , wherein
the first area density on the first medium is equal to or greater than 0.32 milligrams per square centimeter and equal to or less than 0.45 milligrams per square centimeter, and
the second area density on the second medium is equal to or greater than 0.45 milligrams per square centimeter and equal to or less than 0.5 milligrams per square centimeter.

9. The image forming apparatus according to claim 7 , further comprising:
a fixing section that performs a first fixing operation of fixing the first toner image onto the first medium traveling at a first speed and a second fixing operation of fixing the second toner image onto the second medium traveling at a second speed, wherein
the controller controls the fixing section and thereby makes the first speed lower than the second speed.

10. The image forming apparatus according to claim 1 , wherein the first medium comprises an iron-on transfer printing sheet.

11. The image forming apparatus according to claim 1 , wherein the first medium comprises transfer paper, and the second medium comprises plain paper.

12. An image forming method, comprising:
forming, with an image forming section, a first toner image and thereby allowing a first color toner to be attached to a first medium at a first area density and a second color toner to be attached to the first medium at a third area density; and
forming, with the image forming section, a second toner image and thereby allowing the first color toner to be attached to a second medium at a second area density that is different from the first area density and the second color toner to be attached to the second medium at a fourth area density that is substantially equal to the third area density.

13. The image forming method according to claim 12 , wherein
the first area density is set when the first color toner is to be attached to an uppermost layer of the first toner image, and the second area density is set when the first color toner is to be attached to an uppermost layer of the second toner image.

14. The image forming method according to claim 12 , wherein
at least one of a cyan toner or a black toner is used as the first color toner, and
the first area density of the first color toner is made lower than the second area density of the first color toner.

15. The image forming method according to claim 12 , wherein the first color toner includes at least one of Phthalocyanine Blue or carbon black as a pigment.

16. The image forming method according to claim 12 , wherein
the first medium includes a substrate and an adhesive layer that covers the substrate,
the first toner image is to be formed on the adhesive layer of the first medium, the second toner image is to be formed on the second medium, and
the first area density is made lower than the second area density.

17. The image forming method according to claim 16 , wherein
the first area density on the first medium is equal to or greater than 0.32 milligrams per square centimeter and equal to or less than 0.45 milligrams per square centimeter, and
the second area density on the second medium is equal to or greater than 0.45 milligrams per square centimeter and equal to or less than 0.5 milligrams per square centimeter.

18. The image forming method according to claim 12 , wherein the first medium comprises transfer paper, and the second medium comprises plain paper.

Assignees

• Oki Data Kk

Inventors

• Furukawa Yuichi
• Kigawa Kohei

Classifications

• G03G2215/2074

  colour · CPC title

• G03G15/6591

  characterised by the recording material, e.g. plastic material, OHP, ceramics, tiles, textiles (details transferring the toner pattern onto particular materials G03G15/1625) · CPC title

• G03G2215/00523

  Other special types, e.g. tabbed · CPC title

• D06P5/003

  Transfer printing · CPC title

• G03G15/50

  Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control (sequencing control G03G21/14) · CPC title