Pleger, John J · Chicago : The Inland printer company · leaf 118
Job Backincr Machine. ROUNDING AND BACKING 103 opening of the book. This is done by putting the book inthe backing machine with the cords, tape, and the backabove the jaws. The width of the back above the jaws isgoverned by the thickness of the board to be used, butordinarily not more than… … brought over to the right and left by lightly tapping theback with a hammer from the center to the sides. Do nothit hard on the kettle-stitch nor flat on the back, as thethread may break and dents appear; always tap at aslant to the sides to form the ridge. The ridge thusformed should be at an…
Bookbinding
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