Pfaff 30 - Page 9

The
renson
shouid be
regulated
n
accordance w h
tne materia
to be sewn
and snould be
sucn bot
e
sritcnes
wiL
ae
tghtly se
and
ie
in a
straight
ne.
Fig.
13
Tne grade o
nread
ued mays
an rncorcn nar r
meeting
these
-eqwremenS.
Sneer
fabrics
equ
re a
tHn and
sof threoa wini
e astic
iarer
as ca
ror a
reslient
tnread
such
as s
crc., in
order
ro
prevent
tne
seams from
breoKrg
when
suolected to strain.
ttE:1[
fi
ii
Ii
fj
Eg.
14
n
regu aring
the
rnread
tensions you
hove to
nave a
tHe experience
before
you can
tell
wnich
tension
needs adjustment.
In
Fig.
14 eirher the
upper
tension may
be
too t
gir
or he ower
tensn too
oose,
Fig.
15
9