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-6-
8.
Use a bolt to fix the surface in the centre of each side of the screen to the previously placed square
washer (Fig. 12, Fig. 13).
NOTE!
This step is only to keep the washer in position, do not tighten the bolt, just insert slightly. It will
help avoid displacement of the washer during further assembly.
Fig.12
9.
Fix the surface with springs starting from the corners of the screen going towards the centre, starting from
the shorter sides. Make sure the surface is evenly stretched.
NOTE!
The springs should be fastened by two
people, so as to simultaneously fasten the springs opposite to each other. After installing a few springs, the
frame can be slightly lifted to relieve surface tension.
Fig. 13
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