111. How can waste be prevented, or waste paper utilized?
112. Where does a paper-cutting machine naturally show special wear?
113. What other consideration affects the value of a machine?
114. How does the invention of improved machines affect the value of old-style machines?
115. How long should a good paper cutter last?
GLOSSARY OF TERMS USED
Automatic Clamping—Means that the clamp descends upon any height pile and produces approximately the same clamping pressure for all heights and all kinds of material. Among the methods for producing this pressure for automatic clamping are devices which employ friction discs turned only one way by ratchets which produce the maximum pressure with the least expenditure of power; friction discs or friction plungers worked forward and reverse; surfaces sometimes combined with wedge-shaped ways for producing a resultant pressure from the knife; weights, oil and hydraulic and air plungers; springs, climbing gears and weights, etc.
Back Gage—A movable device against which the paper is placed for measuring the size of the sheet to be cut.
Brake, Automatic Friction—Generally a band with a lining which grips automatically the outside of a wheel fastened to the driving gear and stops it promptly after every cut when the knife rises to the top.