Pfaff Creative 1473 Instruction Book page 26

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Exclusive built-in dual feed lets you
do things even experts find difficult.
Even experts find it difficult to match
patterns and plaids when sewing slip
pery silks and synthetics. But easy
matching
is
automatic with Pfaff's
exclusive built-in dual feed.
When two or more fabric layers are
fed simultaneously through conven
tional sewing machines, there is
always the possibility of slippage.
The exclusive Pfaff solution ist built-in
dual feed, a walking foot that simul
taneously feeds the fabric from above
as the feed dog moves it from below.
You can sew up to 12 fabric layers
without fear of slippage.