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Pfaff 433 - Page 9

Pfaff 433
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In
order
to reduce
somewhot
the high
speed
of the machine, the
diameter
of the bobbin winder pulley
has
been Increased to
The V-groove in the rim of the pulley has been designed with an obtuse-
angled profile so that the V-belt
will
fit into it perfectly and, if necessary,
even
o round
belt
may
be used.
The bobbin winder is quietly stopped by means of an adjustable leather
pad.
A windshield which is mounted on the winder
base
prevents the
thread
from
being dragged over
toward
the belt by air suction.
Fasten the bobbin winder to the table with Its driving pulley far enough
from
the
machine
belt
so
that
it will
not
touch
the
belt
when
the
winder
is
disengaged.
Pass the thread from spool 1 through thread guide 2, clockwise around and
between tension discs 3, and to the bobbin.
Pull
the thread through the
slot in the bobbin, from the inside. Place the bobbin on spindle 5 and hold
the
end
of
the
thread
until
the
winder
has
made
a
few
revoilutions.
Start
the winder by pressing down engaging lever 6.
When
sufficient thread has
been wound on the bobbin, the winder will stop automatically. The amount
of
thread
to be
wound
on the
bobbin
is
regulated
by
screw
7.
Turn it to the right
for
more
thread;
end
to
the
left
for
less
thread.
6.
Threading
ihe
Bobbin
Case
Insert a full bobbin into the bobbin
case
so
that
the
thread
draws
on the
top from
1he
left toward the
right,
as shown in photo 5.
Photo
5
From the library of: Superior Sewing Machine & Supply LLC

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