Bookbinding and its auxiliary branches . of usingthe shears when cutting sticks become worn. The oper-ator, at proper intervals, feeds a handful of books, threeor four inches thick, to the gate, which releases itself, andthe books drop into a work holder, which supports thebooks at an angle of forty-five degrees. Thus the booksare jogged without assistance from the operator. Thework is subjected to a pressure of from three to fourthousand pounds, and then moved to the rear, aboutseven inches, against the three knives, which are carriedby a stationary trimming plate. There is a shear motionon a
Bookbinding and its auxiliary branches . of usingthe shears when cutting sticks become worn. The oper-ator, at proper intervals, feeds a handful of books, threeor four inches thick, to the gate, which releases itself, andthe books drop into a work holder, which supports thebooks at an angle of forty-five degrees. Thus the booksare jogged without assistance from the operator. Thework is subjected to a pressure of from three to fourthousand pounds, and then moved to the rear, aboutseven inches, against the three knives, which are carriedby a stationary trimming plate. There is a shear motionon all three knives equal to the travel of the bench ofbooks, which takes place while the bench travels and the TRIMMING 87 knives cut. The plungers then unclamp and retire fromthe rear end of the bench; a handful of books is dis-charged into the receiving trough; the gate is released;a new handful of untrimmed books is dropped intothe place, and the operation is repeated. As the booksare clamped and undamped several times in order to dis-. Smyth Automatic Book C. Fuller. charge handfuls of work, they are thoroughly smashedand uniform in thickness. This machine requires one operator and two helpers— the one to place books on the feed table, and the otherto take the books from the receiving trough and stackthem on a truck. The operator can readily feed fromtwelve to fifteen handfuls of books per minute, whichmeans from two thousand to twenty-five hundred booksone inch thick per hour. From four thousand to six thou-sand magazines one-half of an inch in thickness can betrimmed per hour. 88 BOOKBINDING Continuous Trimmer.— This machine is capable ofdelivering six hundred piles six inches high per hour. Itwill trim sizes as small as 31/2 by 6 inches and as large as131/2 by 18 inches. The changes from one size to anotherare very simple, and consist of turning the cranks thatregulate the space between the head and tail knives, andshifting the four back gauges. There are thr
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbookbinding, bookyear
