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Glossary

Clicking a letter link will take you to the relevant section.

 
JACKET
The paper cover sometimes called the "dust cover" of a hardbound book.

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.

JCP
Joint Committee on Printing (Congress of the United States). Its Committee on Specifications develops specifications for papers used in printing and binding by the Federal Government.

JET PRINTING
See inkjet printing.

JOB LOT
Off quality or discontinued papers sold in small quantities for special orders and usually sold at lower prices. Paper that is overrun or which does not meet standard quality specifications and that is sold at a reduced price.

JOG
To shake a stack of papers, either on a machine or by hand, so that the edges line up. Printers jog the paper to get rid of any dust or particles, and to ensure proper feeding into the press. 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.

JUMBO ROLL
A roll of paper greater than 12 inches in diameter and used for converting into user products.

JUNIOR CARTON
Generally speaking, a smaller version of a regular carton. Whereas a regular carton is generally considered to be of such size as to hold from about 120 to 150 pounds of paper, a junior carton normally contains about 40 to 50 pounds. Junior cartons are most commonly associated with the packaging of writing and printing papers, in small "office sizes," such as 8 x 11 inches. Three junior cartons are usually considered to be equivalent to one regular carton for pricing or other purposes. A carton package of 5 to 10 reams of cut-size paper.

JUSTIFY
To make a line (or lines) of text copy fit both margins exactly.


 
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