312

MODERN PAPER-MAKING

chrome-nickel steel bevel gears mounted in roller and ball bearings. The
machine is direct motor driven through an electro-magnetic coupling which
incorporates an overload safety device and an automatic brake for stopping
the cutter as soon as the motor is switched off.

The whole of the equipment, while massive and robust throughout, is built

[Messrs. Masson, Scott and Co., Ltd.
FIG, 133.—MODERN HIGH-SPEED SUPER-CUTTER WITH LAYBOY
more on the lines of modern high-speed printing machinery than is customary
in paper-mill equipment.
The slitter gear, which is situated in front of the feeding press, is provided
with knife holders of a new design which give an exceptionally wide clearance
for feeding through the sheet. The bottom slitter knives, mounted on a stiff
one-piece shaft, are made in halves so that they can be readily changed to enable
each pair of slitter knives, and therefore the width of each slit web, to be adjusted
simply by turning one handwheel, the width of the web being read off on a
graduated scale.
On leaving the cross-cutting unit the sheets are transported to the layboy
on a system of conveyor bands. With the latest design of feed the paper run
is entirely horizontal right through the cutter. This facilitates handling and