(0)D21F:0/1:
IPC6
SECTION D - TEXTILES; PAPER
PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
D21F
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<<   >>   D21F001/00 - D21F001/82  

D 21 F

 PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON

 

 

 
 

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/ 00 Wet end of machines for making continuous webs of paper

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/ 02 • Head boxes of Fourdrinier machines  

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/ 04 • Head boxes of cylinder machines  

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/ 06 • Regulating pulp flow  

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/ 08 • Regulating consistency  

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/ 10 • Wire-cloths (production of wire-cloths B 21 F)  

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/ 12 • • Seams thereof  

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/ 14 • • • welded  

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/ 16 • • • sewn  

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/ 18 • Shaking-apparatus for wire-cloths and associated parts  

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/ 20 • • in Fourdrinier machines  

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/ 22 • • in cylinder machines  

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/ 24 • Tilting, raising, or lowering mechanisms for wire-cloths  

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/ 26 • • in Fourdrinier machines  

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/ 28 • • in cylinder machines  

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/ 30 • Protecting wire-cloths from mechanical damage  

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/ 32 • Washing wire-cloths or felts  

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/ 34 • Construction or arrangement of spraying pipes  

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/ 36 • Guiding mechanisms (suction rolls D 21 F 3/10)  

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/ 38 • • Pads  

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/ 40 • • Rolls  

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/ 42 • • Jets  

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/ 44 • Watermarking devices  

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/ 46 • • Dandy rolls  

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/ 48 • Suction apparatus (suction rolls D 21 F 3/10)  

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/ 50 • • Suction boxes with rolls  

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/ 52 • • Suction boxes without rolls  

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/ 54 • Skimming devices, e.g. froth ledges  

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/ 56 • Deckle frame arrangements  

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/ 58 • Deckle straps  

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/ 60 • Cylinder moulds  

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/ 62 • Sand traps  

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/ 64 • Magnetic separators  

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/ 66 • Pulp catching, de-watering, or recovering; Re-use of pulp-water  

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/ 68 • • using hydrocyclones (hydrocyclones B 04 C)  

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/ 70 • • by flotation  

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/ 72 • • using funnels  

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/ 74 • • using cylinders  

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/ 76 • • • with suction  

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/ 78 • • • with pressure  

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/ 80 • • using endless screening belts  

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/ 82 • • adding fibre agglomeration compositions  
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