SINGER 404K User Manual
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Threading Central Bobbin Machine No. 15K.
Raise take-up lever to its highest
Place spool of thread on spool
Thread needle from left to right.
Open bed slide.
Open bobbin case latch as shown in
Fig. 19 and withdraw bobbin.
Release the latch, turn the bobbin
case downward and bobbin will
Hold bobbin case with slot in edge
at the top and wound bobbin with
right, as shown in Fig. 20.
Pull thread into slot as shown in
left hand illustration. Fig. 21.
tension spring, and to the left into
the delivery eye at its end, as shown
in right hand illustration. Fig. 21.