Patent ID: 6805425
Filing Date: 2004-10-19
Classification: B41J,B65H

Abstract:
An image forming device, comprising:paper position signal detecting means for irradiating coherent rays of light onto a surface that moves accompanying transfer of paper and for receiving reflected light of the rays of light to generate paper position signals related to positions of the paper; paper transfer amount calculating means for calculating at each specified unit of driving time, through chronological comparison of the paper position signals, a paper transfer amount corresponding to the distance by which the paper has been transferred during each unit of driving time; paper transferring means for transferring the paper by using a driving source at a specified driving speed at each specified time section; paper transfer amount determining means for determining whether or not the calculated paper transfer amount is within a specified normal range at the each unit of driving time; paper transfer amount control value setting means for setting the calculated paper transfer amount as a paper transfer amount control value for a corresponding unit of driving time when it has been determined by the paper transfer amount determining means that the calculated paper transfer amount is within the normal range and for setting a predetermined standard transfer amount as the paper transfer amount control value for a corresponding unit of driving time when it has been determined that the calculated paper transfer amount is outside of the normal range; and time section setting means for setting a time section on the basis of an accumulated value of the paper transfer amount control values.