D21F - CPC Classification

• D21F1/00 » Wet end of machines for making continuous webs of paper 23
• D21F11/00 » Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines 93
• D21F13/00 » Making discontinuous sheets of paper, pulpboard or cardboard, or of wet web, for fibreboard production 46
• D21F2/00 » Transferring webs from wet ends to press sections 45
• D21F3/02 » Wet presses 40
• D21F5/00 » Dryer section of machines for making continuous webs of paper 34
• D21F7/00 » Other details of machines for making continuous webs of paper 70
• D21F9/00 » Complete machines for making continuous webs of paper 130