AUTOMATIC ADJUSTMENT METHOD FOR WRITING POSITION

摘要

PURPOSE:To adjust the deviation of position of a toner image and lessen color shearing by adjusting the letter position of a writing device to an image carrier based on the sensing result of overall reflected rays of a photosensor. CONSTITUTION:A sensitizing drum 21 is charged uniformly by a charger 22, and then laser beam 24 is emitted by a writing device 23 to form the electrostatic latent image of a first color pattern. The electrostatic latent image is developed by a developing instrument 25 to form a first color toner image pattern. The sensitizing drum 21 is charged uniformly by a charger 26, and then laser beam 27 is emitted by the writing device 23 to form the electrostatic latent image of a second color pattern on the first color toner pattern. The latent image is developed by a developing stage 28 to form a second toner image pattern. Thus a toner image pattern is formed by means of the first color toner image pattern and the second color toner image pattern.