Wet end of machines for making continuous webs of paper

Classification Context

Section:

TEXTILES; PAPER

Class:

PAPER-MAKING; PRODUCTION OF CELLULOSE

Subclass:

PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON

Child Classifications

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• D21F 1/02 Head boxes of Fourdrinier machines
• D21F 1/04 Head boxes of cylinder machines
• D21F 1/06 Regulating pulp flow
• D21F 1/08 Regulating consistency
• D21F 1/1 Wire-cloths
• D21F 1/18 Shaking-apparatus for wire-cloths and associated parts
• D21F 1/24 Tilting, raising, or lowering mechanisms for wire-cloths
• D21F 1/3 Protecting wire-cloths from mechanical damage
• D21F 1/32 Washing wire-cloths or felts
• D21F 1/34 Construction or arrangement of spraying pipes
• D21F 1/36 Guiding mechanisms
• D21F 1/44 Watermarking devices
• D21F 1/48 Suction apparatus
• D21F 1/54 Skimming devices, e.g. froth ledges
• D21F 1/56 Deckle frame arrangements
• D21F 1/58 Deckle straps
• D21F 1/6 Cylinder moulds
• D21F 1/62 Sand traps
• D21F 1/64 Magnetic separators
• D21F 1/66 Pulp catching, de-watering, or recovering; Re-use of pulp-water