Evening star., 1936-03-22

along the sides Of the trays, and tfss
air finally goes out the roof of the unit.
Thus each unit always gets fresh.
clean air at the rate of 200 cubic feet
a minute.
Certainly this procedure looks ex-
ceedingly efficient and quick acting.
It completely dehydrates the bonds In
three to four hours. However. they are
kept in the unit five hours longer TO
accomplish the thorough drying Of the
ink
Right after the completed bonds
have been examined for possible de-
fects they are sent to the sizing rooA.
This is in the basement Of the So
called Giving Of the main building.
Perhaps you don't know what sizing
means, so you look around and try to
form your own judgment. You are IN
a high ceilinged and beautifully white
washed room containing Is sizing ma
chines-or so you're told. The boss of
all this happens to be so busy he hast.
time to bother about you. However.
your guide says that one machine
alone could "size" 10000 sheets In
eight hours.
Sizing" the guide now explains,
refers to a solution Of gelatinous ma.
terial used as filler to glaze the sur
face Of paper"
DEALLY the sizing Of the bonus
bonds looks like q very simpis
procedure. First the dry sheets are
placed into an automatic feeder and
then whizzed through a bath Of siZ-
ing made mainly from glue and con-
tanning some alum. The alum. you're
told, is used to harden the glue apa
give the bonds more body.
Operations taking place in the ap-
proximate center Of the machine
serve to dehydrate the glue. On the
far end of the apparatus the sheets
of bonds come out entirely dry, where
a girl examines and stacks them.
BY the way this type of sizing ma
chine is supposed to be much superior
to anything else of the sort in use to-
day. You're told that the bureau tech
nicians have been experimenting with
it for at least IS years, and within the
past year and half have developed
it to the present precise and efhcient|
stage.
Next you watch a number OF girls
press bonds. They count out 100
sheets. place them between the same
number of fiber boards and pass them
through a pressing machine which
subjects them to pressure Of some|
5000 pounds to the square inch. This
result seems almost astonishingy
Whereas previously the bonds were
rather rough and dull looking, thsy
now are bright and smooth. For what
ever the finish on the fiber board hap1
pens to be is transposed onto both the
face and back of the bonds. Never do
the boards wear out. But they do gel
exceedingly dirty and In such case are
Of course, discarded.
One Of the most remarkable gadget
used in the nlassai G the bonus BOND
Is the trimming nla0nine, used to Gu
excess margins Of each sheet. It
the bureaus own brain child, is fool
proof and errorproof.
There are so trimming machines
the bureau. But only handful o.
needed in the bond-making pro
cedure. This is because they work
fast and so efficiently.
Watching one perform, you ca
readily understand why 1t is accura
to within one ten-thousandth OF
inch. In fact, it's so devised that If
weren't that precise. then 1t couldn
cut at all! Moreover, the edge OF Il
bond paper is not used for a guide
is the case with most devices Of Z
general sort. Instead. three guide lin
are followed, located In the center 90
ton Of each bond sheet. Anythj1
that doesn't hew true to these LINES
automatically chopped on.