Pfaff 1216 Instruction Book page 14

Presser bar lifter
Lever 22 has two positions:
A
=
Sewing foot is raised. (Before you
remove the work, turn the balance
wheel toward you to raise the
needle and take-up lever 1.)
B
=
The sewing foot is lowered for
sewing.
Dual feed
(Synchronized top and bottom feed)
This feed mechanism prevents one ply
from creeping ahead of the other.
Before you engage or disengage the dual
feed, raise the sewing foot,
To engage: Push top feeding foot 23
down until it snaps into place.
To disengage: Push the top feeding foot
down slightly, then pull it back and let it
swing up.