STEP 3:
Continue in the same way with the two shorter sides and finally with the lower
long side.
As a result, the Velcro should be attached to the inside of the frame right
the way around the frame. Sometimes it is necessary that the long sides are
somewhat compressed or gathered with the fabric, this provides the best flat-
ness or fabric tension. (The fabric is always „pulled" outwards from the frame
in the middle). Depending on the temperature, there may also be different
lengths between the frame and the projection surface. In this case, try to pull
the Velcro strip from the frame a little, or store the fabric for a few hours in
normal room conditions to achieve the „normal" size of the material.
Always pull the fabric only by the outer sewn-on tape, not by the PVC material
itself, so as not to damage or overstretch the material. After the first applica-
tion you will immediately recognise the optimum process, a correction of the
Velcro can still be made even when inflated. The strap sewn all around the fab-
ric still ensures that you end up with a rectangular projection surface.
The Velcro strip on the frame being considerably wider than that of the fabric
gives the possibility of flexibly adapting the fabric to the frame.
STEP 4:
Place the fan behind the screen and tie
the air hose of the frame tightly around
the air outlet of the blower. For this
purpose you will find laces sewn to the
hose. Two sets are available, a shorter
length if you do not have the space,
and a full length set for where you have
more space.
Roll up the hose as far as it will go and put it over the air outlet of the blower,
tie the cords around it and fasten them, attaching the hose to the blower. Al-
ternatively, use the 2nd pair of laces to tie the blower as far away as possible
behind the frame, thus reducing the noise.
Fig. 2: wall and
Set up motor fan
7