To make books {bookbinding}|, a machine folds 16, 32, or 64 consecutive pages like theater programs, with untrimmed outer edges {signature, book}. Machines sew signature stack through fold center, and then press pages flat and trim them to make books. Machines glue cheesecloth to fold side to make edge {spine, book}. Machines glue extended cheesecloth edges to cover boards. Machines glue outer papers of outer signatures to other cheesecloth side.
For paperback books, machines can trim stacked and pressed signatures on all sides, apply cheesecloth to edge using special penetrating glue, and glue cover onto spine {perfect binding} {paperback book}|.
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Date Modified: 2022.0225