The light frame of the printing-press, which folds down upon the tympan (q.v.) over the sheet of paper to be printed. Its object is two-fold?to hold the sheet in its place and to keep the margins clean. It is called frisket because it frisks or skips up and down very rapidly ?i.e. the pressman opens it and shuts it over with great alacrity, the movement being called ?flying the frisket.?