SINGER 101-12 - Manual (Page 23)

Draw the thread backward between the bobbin
case and the tension spring until it reaches the notch
21
F
iq
. 20. B
obbin
C
ase
T
hreaded
(2, Fig. 20), then pull the thread toward the right,
as shown in Fig. 20.
When closing the slide, leave just enough space
for the thread to pass through, as shown at 3, in
Fig. 21.
Fia. 21. U
nder
T
hreading
C
ompleted