US 2004/0057756 A1 · Image adjustment method and image forming apparatus

Abstract

When an instruction to execute a color registration adjustment process is given (S1), an image forming apparatus deactivates a sheet feed driving section and a fixing unit (S2), stops communications with external devices (S3), invalidates control sensors excluding an operation section, a door sensor, and sensors involved in formation of images for adjustment (S4), stops a fan (S5), and then executes the color registration adjustment process by forming reference lines and correction lines on a transfer belt and detecting misregistration between them (S6). With this image adjustment method, it is possible to reduce wasteful consumption of developer and efficiently execute the color registration adjustment in a short period of time.

Claims17

Dependent claims

An image adjustment method of transferring a plurality of color component images by a transfer unit, detecting a superimposed state of the respective transferred color component images with a sensor, and adjusting an image transfer position, based on detected results, to correctly superimpose the respective color component images, comprising the steps of:

accepting information giving an instruction to detect a superimposed state of the respective color component images;
starting detection of a superimposed state of the respective color component images by controlling an operation of the sensor, upon acceptance of the information;
and
stopping operations other than control of the operation of the sensor and accepting of detection results of the sensor, when detecting the superimposed state.

1 more element

An image forming apparatus for forming an image by superimposing a plurality of color component images by separately transferring each color component, comprising:

a housing capable of being opened and closed;
an image sensor for detecting a superimposed state of the respective transferred color component images;
an open/close sensor for detecting opening and closing of the housing;
and
a controller capable of performing operations of:
controlling an operation of the image sensor;
accepting information giving an instruction to detect a superimposed state of the respective color component images;
and
stopping operations other than control of the operation of the image sensor, accepting of detection results of the image sensor and accepting of detection results of the open/close sensor, when the accepting means accepts the information.

6 more elements

An image forming apparatus for forming an image by superimposing a plurality of color component images by separately transferring each color component, comprising:

a housing capable of being opened and closed;
accepting means for accepting information giving an instruction to detect a superimposed state of the respective color component images;
image detecting means for detecting a superimposed state of the respective transferred color component images;
control means for controlling an operation of the image detecting means;
and
open/close detecting means for detecting opening and closing of the housing,
wherein operations other than control of the operation of the image detecting means by the control means, accepting of detection results of the image detecting means and accepting of detection results of the open/close detecting means are stopped when the accepting means accepts the information.

4 more elements

Dependencies are inferred from the claim text.

Image adjustment method and image forming apparatus

Life of this patent

Image adjustment method and image forming apparatus

Life of this patent

Abstract

Claims17