Pleger, John J · Chicago : The Inland printer company · leaf 120
wheel on top, back of the roller. Theroller is adjusted by a hand wheel on the right of the ROUNDING AND BACKING 105 machine; it is raised or lowered by two nuts, operatingon screws on both sides. These are raised or lowered,according to the height of the book. Accurate roundingis indispensable… … Roller BackiriK Machine. 106 BOOKBINDING the roller forward and back two or three times. Releasethe clamp by stepping on the treadle, and remove thebook. ROUNDING AND BACKING MACHINE (CROWLEY).The production of letterpress books by machine hadits beginning with the invention of the rounding…
Bookbinding
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