Pfaff
467-900/2
machines are so
designed
that
sewing
and
thread trimming, the
two
most
important phases of machine operation, are controlled by the right treadle. Varying the stroke
of
the
vibrating
presserand
reversing
the
direction of feed, like on machines having no automatic
thread trimmer, are controlled by
the
left treadle. In this case, the top feed variation may be
controlled
by
depressing
the
tip or
heel
of
this
treadle,
as
desired.
The
various
possibilities
existing
are
illustrated
in
sketch
4
below;
Top
feed
variation
Sketch
4
Reverse
sewing
Forward
sewing
After
sewing:
needle
down
—
Neutral
position
Afterthread
trimming:
needle
up
Raising
the
needle
and
trimming
the
threads
The
above
foot
control
is
identified
by
subcl.
-900/2
and
is
our
standard
version.
Since in many instances there is no need to vary the stroke of the vibrating presser while
sewing, the Pfaff 467, on special request, can be supplied in subcl. -900/1 fitted with a single
treadle. In this case, the stroke of the vibrating presser must be set by hand before sewing
commences and the machine switched from forward to backward sewing by operating the
reverse
feed
control
by
hand.
This
simplified
foot
control
is
illustrated
in
sketch
5.
Sketch
5
18
Forward
sewing
Raising
the
needle
and
trimming
the
threads
After
sewing:
needle
down
Neutral
position
After
thread
trimming:
needle
up