| 摘要 |
Precise positioning of image data on an imaging belt (30) in the electrostatographic printing process is accomplished using a positioning means. Lateral position of the imaging belt (30) is detected using a light source (40) and photodetector (44,72,130,208,226) determine an imaging belt edge position and tying the transfer of image data to that position. Circumferential position of the imaging belt is detected using one or more transparent windows which pass over the photodetector (44,72,130,208,226) which, in turn, is illuminated by the light source (40) when a window passes it. The signal from the detector is used to calculate a circumferential adjustment and either the light source or imaging belt motion is adjusted accordingly. Nonoptical embodiments using magnetic or capacitive detectors also can be used to detect the imaging belt circumferential position. A method for positioning image data on an imaging belt is also disclosed. <IMAGE> |
