Singer 328 - MECHANISM OF NEEDLE SELECTION AND FUNCTIONS OF EACH MAIN PART; Punch Card; Pattern Unit

3.
MECIIANIS}I
OF NEEDLE
SELECTION
AND
FUNCTION
OF
EACH I,IAIN
PART.
3-1 Punch
Card:
A Punch
Card
is made
hales
that
represents
from
vinyl
chtoride
a
pattern.
and
has
many
punched-
3-2 Pattern
Unit:
Fig.
7
The
Pattein
Unit
reads a pattern
from
a
punch
Card
anal
con_
veys it
to the
l,lain
Drum
on
the
Carriage.
When
the
Carriage
is moved
across
the
needle
bed,
the
Feed_
ing
Lever,
on the
pattern
Unit,
is
raised
by the
Dri;il)g
Can,
seculed
to the rear
side
of
the Carriale,
and
the
Touch
Levers
are
noved
by spring
action.
Fis.
e