US 7,093,917 B2 · Image forming apparatus and correction method of transfer condition thereof

Abstract

An image forming apparatus which corrects a transfer amount of a recording material without a scanner is provided. A paper is transferred to a position in which the transfer amount is adjusted by an LF roller, and a test pattern image in which a first pattern image and a second pattern image are printed in different transfer positions. Then, the paper is transferred to a position in which the transfer amount is adjusted by an exit roller, and the aforementioned test pattern image is printed. The test pattern images printed as above are used to visually observe and determine a degree of error in the amount transferred by the respective rollers. Accordingly, by receiving an input based on the printed test pattern images, it is possible to correct the transfer amount of the respective rollers.

Claims30

Dependent claims

An image forming apparatus provided with a transfer unit and a record head having a plurality of record elements arranged thereon for recording dots on a recording material, the apparatus forming an image on the recording material based on a transfer operation for making the transfer unit transfer the recording material and a move operation for making the record head travel to a direction orthogonal to a transfer direction of the recording material, the image forming apparatus comprising:

a pattern generation unit that generates a predetermined test pattern image;
a record unit that records the test pattern image generated by the pattern generation unit on the recording material transferred by the transfer unit using the record head;
an input unit which inputs a result of visual comparison between the test pattern image and a plurality of sample images prepared based on change in the transfer condition of the transfer unit;
and
a correction unit that corrects the transfer condition of the transfer unit based on the comparison result received via the input unit.

2 more elements

A correction method of transfer condition in an image forming apparatus provided with a transfer unit and a record head having a plurality of record elements arranged thereon for recording dots on a recording material, the apparatus forming an image on the recording material based on a transfer operation for making the transfer unit transfer the recording material and a move operation for making the record head travel to a direction orthogonal to a transfer direction of the recording material, the method being for correcting the transfer condition of the transfer unit,

the method comprising steps of:
generating a predetermined test pattern image;
recording the test pattern image generated in the pattern generation step on the recording material transferred by the transfer unit using the record head;
inputting information from outside;
and correcting the transfer condition of the transfer unit based on the information inputted in the input step, wherein
the transfer condition of the transfer unit is corrected in the correction step by inputting as the information a result of visual comparison between the test pattern image recorded on the recording material in the recording step and a plurality of sample images prepared based on change in the transfer condition of the transfer unit.

3 more elements

Dependencies are inferred from the claim text.

Image forming apparatus and correction method of transfer condition thereof

Life of this patent

Image forming apparatus and correction method of transfer condition thereof

Life of this patent

Abstract

Claims30