[51
Knife
mechanism
[Upper knife mechanism]
(1)
When
the
crank shaft 0 rotates in
the
direction
of
the arrow,
the
upper knife driving rod assembly @
moves up and
down
on
the
eccentric part
of
the
crank shaft
0.
(2)
The upper knife differential
arm@)
connected
to
the
upper knife driving rod assembly 8 oscillates.
(3)
The upper knife differential arm
@)
oscillates
the
attached upper knife holder 9 and
the
upper knife
@).
[Lower knife mechanism]
(4)
The
lower
knife
(9
is
attached
to
the
lower
knife holder
6,
and
is
engaged
with
the
upper knife 0 via
the
spring
@).
The
lower
knife holder guide@) positions
the
lower
knife
<a,
and guides the lower knife holder
6.
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