fi'·
,,/
To
Regulate
the
Tensions
For ordinary stitching, the tension on the upper and lower threads should be equal so as
to
lock both
threads
in the center
of
the fabric,
Thus:
If
the tension on either
thread
is stronger
than
on the other, imperfect stitching
wiU
be the result.
If
the
tension on the upper thread
is
greater than
that
on
the
lower thread, it wlll lie
straight
along the upper
surface
of
the fabric,
Thus:
If
the tension on the lower thread is greater
than
that
on
the
upper thread, the lower thread will lie
straight along
the
underside of the fabric,
Thus:
9
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