| 摘要 |
PURPOSE:To prevent faulty transfer and retransfer by calculating the optimum pressure of a transfer roller based on the measurement of thickness/resistance. CONSTITUTION:In the case of supplying paper Y to clearance between a photosensitive body 11 and the transfer roller 12, the paper Y is interposed between an upper roller 31 and a lower roller 32 to measure the thickness of the paper Y. Simultaneously, current is applied to paper Y to measure the electric resistance of the surface of the paper Y, and the length of the paper in a width direction is measured by a transmission type optical coupling device. By considering with the measured results, the pressure of the roller 12 is adjusted and paper Y is press-contacted to the photosensitive body 11 with the optimum pressure. |
