| 摘要 |
PURPOSE:To easily adjust the variable density of an image to be developed by providing a pressure roll mechanism which can variably set at least either the rotating speed or pressure of a pressure roll with the aid of the signal of a variable density selection input part. CONSTITUTION:The titled device has an additional mechanism to change the pressures of the pressure rolls 11 and 12. This mechanism has as motor 21, a drive gear 22 and a follower gear 23 connected to a bolt 15, and is so constituted to rotate the bolt 15. If a step motor is used for the motor, everything goes well. The 1st controller 24 to generate an applicable pulse output is connected to the step motor 21, and instructs the motor to rotate normally or reversely. A signal caused by setting a density adjustment mechanism 25 is inputted to the controller, and a corresponding output is given to the motor 21. |
