Patent ID: 7258414
Filing Date: 2007-08-21
Classification: B41J

Abstract:
1. An image-forming apparatus, comprising: a paper-carrying belt to carry paper; a drive unit to driving the paper-carrying belt; a scale provided on the paper-carrying belt to indicates position information and that includes a scale seam; a position-detection unit to read the position information from the scale; and a control unit to generate position information from an output of the position-detection means and control the drive unit based on the position information in order to drive and control the paper-carrying belt; wherein the position detection unit comprises a first sensor and a second sensor for reading the position information from the scale unit, and the first sensor and the second sensor separated by a distance which is more than or equal to a gap width of the scale seam; and wherein the control unit is operable to use as position information what is combined after putting weightings on a first sensor output which is output from the first sensor and a second sensor output which is output from the second sensor.