Singer 331K4 - Winding the Bobbin; Threading the Bobbin Case; Replacing the Bobbin Case

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
TO WIND
THE
BOBBIN
(See "STOP MOTION
DEVICE"
for
treadle
machines on
page
11)
Bobbin winder should
be
fastened to
table
with its
driving pulley
approximately
1
/4
inch
in
front
of
the
machine belt. Bobbin winder driving pulley
will
then
make
firm
contact with machine belt when thumb latch
is
pressed down. Bobbin winder pulley
will
be
released
from contact with
belt
when sufficient
thread
has
been
wound upon the bobbin.
Place bobbin on spindle, pushing it on
as
far
as
it
will
go
and
pass
thread
through threading points,
as
shown
in
Fig. 11.
Wind
end
of
thread
around the bobbin a few times
in
the direction shown
in
Fig. 11.
Press down on thumb
latch, pushing driving pulley
over
against
belt.
Start
the machine.
Bobbins can
be
wound while the machine
is
stitching.
TO
AVOID
SPILLAGE:
Regulate bobbin winder to
stop automatically when bobbin
is
wound
approx-
imately
1
/16
inch
short
of
bobbin
rim.
TO THREAD
THE
BOBBIN
CASE
Hold the bobbin so
that
the
thread
will
unwind
in
the
direction shown
in
Fig. 12.
Hold the bobbin
case
as
shown
in
Fig. 12
and
place
the bobbin into it.
Pull
the
thread
into the slot
1, Fig. 13
and
under the
tension spring
2,
Fig. 13.
Draw the
thread
into the delivery
eye
at
the
end
of
the tension spring,
as
shown
at
3, Fig. 14.
TO
REPLACE
THE
BOBBIN
CASE
After threading,
take
bobbin
case
by
latch
in
the
left hand.
Place
bobbin
case
on centre stud
of
shuttle
body
with position finger pointing
upward,
in
front·of notch
in
upper
plate
over
shuttle race,
as
shown
in
Fig. 15.
Release latch.
Press bobbin
case
back
until
latch catches groove
near
end
of
stud.
Allow
about
two inches
of
thread
to
hang
free.
7
NOTE-TIGHTEN
FOR
MORE THREAD
ON
BOBBIN
ACE
BOBBIN
ON
SPINDLE
. WIND THREAD
3.
PRESS
DOWN
Fig. 11. Winding the Bobbin
SLOT~
Fig. 12. Placing Bobbin in Bobbin Case
2. DRAW THREAD
DOWN AND
UNDER
SPRING
Fig._
13. Pulling the Thread into the Slot
·fig.
14. Drawing the Thread Under the Tension Spring
1. HOLDING LATCH,
REPLACE
BOBBIN
CASE
ON
STUD
2.
RELEASE
LATCH
3.
PRESS
BACK
Fig. 15. Bobbin Case Threaded and Replaced