SINGER 216G - Manual (Page 64)

The Width and Height of Air Tucks
The width and the height of air tucks must first of all
be adjusted according to the kind of material being
used. They are also determined, however, by fashions
and by the individual taste of the seamstress. Before
starting sewing it is advisable to test the adjustments
by making a trial tuck on a remnant of the material
to be used. If the air tucks are to run in different
directions, then a trial test is also appropriate, in
order to see if the material is suitable for lengthwise
or bias air tucks since not all materials are suitable
for both. Illustrated chart on opposite page (Fig. 71)
will serve as a guide as to the distance between the
needles, the depth and height of traverse, and the
depth of the groove of the foot, etc., for the material
to be used.
Parallel Air Tucks
When making air tucks running closely parallel to
each other the first tuck will serve as a guide for the
second tuck and so on.
Sewing Angles and Corners
For obtuse angles and rectangular corners the needles
are left in the goods (if possible, when the needles are
just beginning to rise but are still in the material) and
the goods is turned in the new direction. For acute
angles it is recommended first to turn the material
halfway, make one stitch and, then only, to turn the
goods in the new direction desired. In this case also
the needles serve as a pivot and must, therefore, be
in the material during the turning.
Crossed Seams
When stitching across air tucks previously made,
proceed very carefully and, if necessary, pull the
material slightly in the feeding direction.
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