Bookbinding and its auxiliary branches . Book Compressor Stripped, Showing TokkIps and Gearing. adjusted, and is built in five sizes, which will take anylength of book up to thirty-six inches. It consists of twoupper and two lower jaws. The jaws slide in two hori-zontal bars; the upper jaws hold the book in place beforethe lower jaws close in on the back. This prevents sag-ging or disarranging of signatures before or while under TRIMMING 79 pressure, and the uniformity of the back is a great helpto good rounding, backing and casing-in. common error made by printers is to make up for
Bookbinding and its auxiliary branches . Book Compressor Stripped, Showing TokkIps and Gearing. adjusted, and is built in five sizes, which will take anylength of book up to thirty-six inches. It consists of twoupper and two lower jaws. The jaws slide in two hori-zontal bars; the upper jaws hold the book in place beforethe lower jaws close in on the back. This prevents sag-ging or disarranging of signatures before or while under TRIMMING 79 pressure, and the uniformity of the back is a great helpto good rounding, backing and casing-in. common error made by printers is to make up formsthe full measurement of the page, thereby leaving thebinder no trim margin. A standing rule of every print-ing and binding establishment should be to allow one-eighth of an inch trim margin for the fore edge, head andtail of all stitched tablets and quarter-bound cut-flushbooks. All sewed books should have three-sixteenths ofan inch for the fore edge, and one-eighth of an inch forthe head and tail trim margins. The trimming of letter-. Plow Trimming Contrivance, for fine and Amateur Job Binding. press work should be standardized, so that paper-coveredbooks are trimmed a trifle larger to permit a retrim whenbooks are returned for a substantial cover. To illus-trate this, a sheet 24 by 38 inches made up into thirty-two-page signatures, when folded, is 6 by 91/2 inches. Thepaper-covered books should be trimmed 5% by 9i/8 inches;one-eighth of an inch is trimmed off the head, the balanceofl: the tail, while the fore edge has one-eighth of an inchtrim. These books, when returned for permanent covers,as they frequently are, have one-sixteenth of an inch 80 BOOKBINDING trimmed off the head and tail, and one-eighth of an inchoff the fore edge. This gives the standard book size,5% by 9 inches, for the bound volume. When the entire edition is to be bound with a per-manent cover, provision is made for three-sixteenths of
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbookbinding, bookyear
