Singer 321 KNITTER - Page 10

6
How a needle forms a stitch
Fabric Presser
Sinker
Yarn
Feeder
Sinker
Yarn
Latch
.
•
Hook
Fig.
6
(1) An old
stitch is hanging on
the hook of a
needle.
(2) The
needle is pushed out forward
by Main Cam and Sub Cam,
when the fabric
is about to be
carried forward also but is
stopped by Fabric Pressor, and
only the needle is
brought forward getting its
latch opened by the
stitch.
(3)
As the needle comes
further forward, the stitch
goes over and behind
the
latch.
(4) The thread
is fed on the
hook of the needle
through Yarn
Feeder to form
a new stitch.
(5) The
needle starts
moving backward
being pushed by
another Main Cam.
(6) As the
needle goes
backward, the
fabric pushes the
latch causing
it to close.
(7) When the needle is
led
further backward, the latch
closes on the hook
completely,
confining the thread under it.
(8) When the
needle is back
completely, the old stitch
slips off the hook
passing
over the latch.
(The Sinker
Needles serve to
make even the sizes
of
stitches.)
Now, a new
stitch is on the hook.