| 摘要 |
PROBLEM TO BE SOLVED: To improve the precision of printing and to extend the life of a screen mask by holding the reduction of the tension of the screen mask by repeated use at a proper value by a simple operation without making the structure complex. SOLUTION: A printing mask 1 is used, which can adjust the tension of the set screen mask 7 by elastically deforming frame side parts 3 and 4 constituting a mask frame 2 outside. A screw member 9 is arranged, while being stretched, between the frame side parts 3 and 4 which are arranged to face each other, and the distance between the frame side parts 3 and 4 is enlarged by turning an adjusting nut 16 to adjust the tension of the screen mask 7. When the tension is reduced, the nut 16 is turned appropriately, and a downsized printing pattern part P in the middle of the mask is elongated with the frame to keep the tension properly.
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