J

jog - To align sheets of paper into a compact pile.

joint - The flexible hinge where the cover of a casebound book meets the spine, permitting the cover to open without breaking the spine of the book or breaking apart the signatures; also called a hinge.

Jordan - Proper name for the beater on the paper machine. In the Jordan, the pulp is pulverized, causing the pulp and water to mix in a uniform manner.

junior carton - A package of reamed sealed, cut-size paper packed 8 to 10 reams per carton.

justify - Fitting a line of type to both margins.