# US 10,310,430 B2 · Image quality stabilization processing

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- Number: US 10,310,430 B2
- Document ID: US10310430B2
- Status: Granted
- Kind: B2
- Application number: 15/464,652
- Filed: 2017-03-21
- Published: 2018-08-16
- Granted: 2019-06-04
- Earliest claimed: 2017-02-13
- Assignees: Kabushiki Kaisha Toshiba; Toshiba Tec Kabushiki Kaisha
- Applicants: Kabushiki Kaisha Toshiba; Toshiba Tec Kabushiki Kaisha
- Inventors: Hideaki Fukaya
- Web page: https://patentgrep.com/patent/US10310430B2

## CPC

- G03G 15/5058: {using a test patch}
- G03G 15/55: {Self-diagnostics; Malfunction or lifetime display}
- G03G 15/6585: {by using non-standard toners, e.g. transparent toner, gloss adding devices}
- G03G 15/0126: {using a solid developer}
- G03G 15/0189: {primary transfer to an intermediate transfer belt (G03G15/0184 takes precedence)}
- G03G 15/043: with means for controlling illumination or exposure (G03G15/041 takes precedence)
- G03G 15/065: {Arrangements for controlling the potential of the developing electrode}
- G03G 15/205: {specially for the mode of operation, e.g. standby, warming-up, error (G03G15/2046 takes precedence)}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

According to one embodiment, there is provided an image forming apparatus including an image forming unit and a controller. The image forming unit is able to execute a first image formation processing using a first color material and a second image formation processing using a second color material. The controller performs image quality stabilizing processing for the first image formation processing using second color material.

## Claims

### Claim 1

An image forming apparatus comprising:
an image forming unit configured to conduct first image formation processing using a first single color material and second image formation processing using a second multicolor (Y,M,C,K) material; and
a controller configured to perform image quality stabilizing processing for first image formation processing, wherein the image quality stabilizing processing operations performed by the controller further comprise:
conducting a second image processing to print a test pattern using a black (K) color of the second multicolor material;
detecting a position, a shape and a concentration of the test pattern;
calculating a magnification deviation and inclination deviation of the test pattern from a predefined model; and
correcting a write position of a drum associated with the imaging forming unit on which the first image formation processing is conducted based on the magnification deviation and the inclination deviation,
wherein the controller receives a setting which indicates whether image quality stabilizing processing for first image formation processing is to be performed in either a first mode using the first color material or a second mode using the second multicolor material, wherein the first mode is an image quality priority mode, and the second mode is an economic efficiency priority mode.

### Claim 2 (depends on 1)

The apparatus according to claim 1,
wherein the first color material is color material for decolorization with which an image formed using the first color material is decolorized through decolorization processing of heating of a sheet, and
the second multicolor material is color material for non-decolorization which develops color even being subjected to decolorization processing.

### Claim 3 (depends on 1)

The apparatus according to claim 1,
wherein the controller receives a setting which indicates whether image quality stabilizing processing for first image formation processing is to be performed in any one of the first mode, the second mode, and a third mode at which execution of image quality stabilizing processing is prohibited.

### Claim 4 (depends on 1)

The apparatus according to claim 1,
wherein when the user is approved, the controller acquires mode setting of a user in image quality stabilizing processing for first image formation processing from a storage region.