U]
Upper
thread
cutter
mechanism
Clamping
Cutting
thread
Scissors
U
&
Clamping
foot
1. Whenthe presser bar lifterconnectingrod O movesinthedirection ofthe arrow, presserlifter0 drops down in
the direction of the arrow pivoting on presser lifter lever shaft
O.
2. The trimming clutch guideO isfixedon the end ofthe presserlifter ^nd the clutch cam0 isfixedon this and
drops
down in the same way.
3. When the clutch cam 0 comesaway from the trimming clutch plate
O,
the upper thread trimming leverO is
moved in the direction of the arrow by the scissors operating spring
O.
4. The upper thread trimming lever B O is
fixed
to the end of the upper thread trimming lever
0,
and the
movement is transmitted to the scissors D 0 fixed on the upper thread trimming B
O.
5. The scissors M 0 attached to the scissors D 0 come in contact withthe clampingfoot, and the scissors M0
close
to
cut
the
needle
thread.
6. The scissors guide 0 fixed on the length feed arm advances in the direction of the arrow when the machine is
started, and the scissors M 0 open.
-8-
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