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Shown below are the definitions for: J
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jaw fold(er) Also called a tucker fold. One or two folds are created in a web, at right angles to the direction of web travel, by the use of a two or three cylinder device. The lead edge of the web is caught by some means on the first cylinder (commonly by pins which penetrate the paper; the effect can be observed on a newspaper fold) which carries it around the first cylinder. Half way around, a tucker blade on this cylinder forces the center of the soon to be folded web, into the folding jaw on the second cylinder. The jaw closes, thus creating the fold. At the same time or subsequently, a cut-off knife separates the tail of the signature from the web. The signature is carried around the second cylinder and released by the jaw and the cycle continues. The signature can be passed to a third cylinder in a similar manner to make a second parallel jaw fold.
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jet printing See "inkjet" printing.
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job lot Paper that is overrun or which does not meet standard quality specifications and that is sold at a reduced price.
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jog 1) The mechanical or manual operation of producing a smooth sided pile of paper, by shoving and pushing them together against a smooth flat surface; to straighten or align sheets of paper in a stack. 2) The "inching" of the drive mechanism of a piece of machinery, such as a coater or printing press.
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junior carton A carton package of 5 to 10 reams of cut-size paper.
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justify To make a line (or lines) of text copy fit both margins exactly.
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