| 摘要 |
PURPOSE:To prevent a delicate shift of an interlayer printing position by finely adjusting the printing position of each layer while detecting a single positioning mark shown on a board or a multiply paper to be pasted on the former. CONSTITUTION:A positioning mark 48 exposed on the surface of the second intermediate product 46 is detected by a photosensor 65, and its signal is processed by a control device 68. If it is judged that the proper printing position of the second intermediate product 46 does not reach a printing device 60, the second intermediate product 46 is pulled by a motor for fine adjustment 66. On the other hand, if the proper printing position of the second intermediate product 46 is determined to be overfed downstream beyond the printing position 60, the motor for fine adjustment 66 reverses slightly by means of a signal from the photosensor 65. Consequently, the second intermediate product 46 is set to a state in which it is pulled by a brake 70 and a tension roll 73. This permits reduction of the tension of the second intermediate product 46 and its subsequent slight contraction to the brake 70 side accompanied by its slight movement relatively upstream against the printing device 60. Finally, the proper printing position of the second intermediate product 46 and the printing device 60 coincide with each other to obtain a fine adjustment of the printing position.
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