IPC 2013 : D21F 13/06 : Format rolls.IPC2013 > D > D21 > D21F > D21F 13/00 > D21F 13/06 > Format rolls.
D SECTION D — TEXTILES; PAPER.
D21 PAPER-MAKING; PRODUCTION OF CELLULOSE.
D21F PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON.
D21F 13/00 Methods or apparatus for making discontinuous sheets of paper, pulpboard, or cardboard, or of wet web, for fibreboard production (making discontinuous sheets of board in moulds D21J; drying paper, pulpboard, or cardboard, in discontinuous-sheet form F26B).
D21F 13/06 · · Format rolls.