Image forming by using a distribution of heights
AssigneeCanon Kabushiki Kaisha
InventorMasanori Akita
Life of this patent
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Abstract
An image forming apparatus includes a toner image forming device for forming a color image. The toner image forming device forms a first color test image and a second color test image superposedly on an image conveying member so that at least one of a screen angle and a screen ruling with respect to the first color test image is different from that with respect to the second color test image. The image forming apparatus further includes a detecting device for detecting a distribution of heights of the first and second color test images formed superposedly on the image conveying member by the toner image forming device, and a control device for controlling a toner image forming condition of the toner image forming device on the basis of the distribution detected by the detecting device.
Claims6
A color image forming apparatus comprising
- a first image forming device configured to form a first color toner image on an image conveying member using a first color toner;
- a second image forming device configured to form a second color toner image, superposedly on the first color toner image, on the image conveying member using a second color toner having color which is different from color of the first color toner;
- a third image forming device configured to form a third color toner image, superposedly on the first and second color toner images, on the image conveying member, using a third color toner having color which is different from the color of the first color toner and the color of the second color toner;
- an executing device configured to execute a test mode in which first, second and third color test toner images are formed superposedly on the image conveying member by said first, second and third image forming devices so that at least one of a screen angle and a screen ruling with respect to the first, second and third color test toner image are different from each other;
- a detecting device configured to detect a distribution of heights of the first and second and third color test toner images in a moving direction of the image conveying member, in the test mode;
- and
- a controlling device configured to control density of the first color toner image to be formed by said first image forming device and density of the second color toner image to be formed by said second image forming device and density of the third color toner image to be formed by said third image forming device, on the basis of the distribution of heights detected by said detecting device, respectively.
Dependencies are inferred from the claim text.