Printing; a textbook for printers' apprentices, continuation classes, and for general use in schools (1917)
Henry, Frank Souder, 1867- · New York, John Wiley & sons, inc.; [etc., etc.] · leaf 179
Fig. 94.—Proper Way to Lock up a Form. 142. Quoins.—Wedge-shaped devices, known as quoins,are used for locking up forms. For many years wooden quoins … Morton Lock-apFig. 95.—Some Standard Forms of Iron Quoins. were the only kinds in use, being driven together with a shooting-stick. Then came iron quoins, locked with a key. Today LOCKING UP FORMS 165 there are quoins for every imaginable purpose. Fig. 95 illus-trates a few. 143. Locking up a…
Printing
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