Photo
25b
This
arrangement causes the short end of needle thread to be pulled down
which is left
after
cutting.
When actuating the bobbin thread trimmer, bobbin thread pull-off i pulls
the thread over blade 1 and pulls off the exact amount of thread which is
required for the first stitch of the succeeding buttonhole. Then the trimmer
cuts
the
thread
os
the
two
blades
meet.
Photo 25b shows the final position
after
cutting the thread.
Photo
26
30