B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
 B01 - 
B07
Subsection index
LIQUID/LIQUID, LIQUID/GAS OR GAS/GAS SEPARATION
Method
General operationsB01D
by centrifugal force, using centrifuges or free-vortex apparatusB01D
using magnetic or electrostatic effectB03C
Apparatus
General operationsB01D
by centrifugal force, using centrifuges or free-vortex apparatusB04B, B04C
using magnetic or electrostatic effectB03C
SOLID/LIQUID OR SOLID/GAS SEPARATION
Method
General operationsB01D
by centrifugal forceB01D
using centrifuges or free-vortex apparatusB01D
using magnetic or electrostatic effectB03C
Apparatus
General operationsB01D
by centrifugal forceB01D
using centrifuges or free-vortex apparatusB04B, B04C
using magnetic or electrostatic effectB03C
SOLID/SOLID SEPARATION
Method
Dry methods
material in bulkB07B
Individual sortingB07C
Screening, sifting, pneumatic sortingB07B
using pneumatic tables or jigsB03B
by magnetic or electrostatic effectB03C
by centrifugal forceB07B
using centrifuges or free-vortex apparatusB07B
Wet methods
General operationsB03B
flotation, differential sedimentationB03D
screeningB07B
Combinations Dry methods - wet methodsB03B
Apparatus
Dry methods
material in bulkB07B
Individual sortingB07C
Screening, sifting, pneumatic sortingB07B
using pneumatic tables or jigsB03B
by magnetic or electrostatic effectB03C
by centrifugal forceB07B
using centrifuges or free-vortex apparatusB04B, B04C
Wet methods
General operationsB03B
flotation, differential sedimentationB03D
screeningB07B
Combinations Dry methods - wet methodsB03B
  
SHAPING
 B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (casting, powder metallurgy B22; shearing B23D; working of metal by the action of a high concentration of electric current B23H; soldering, welding, flame-cutting B23K; other working of metal B23P; punching sheet material in general B26F; processes for changing of physical properties of metals C21D, C22F; electroforming C25D 1/00)
 B21

Note(s)

  1. This class does not cover:
  2. Processes of a kind covered by this class but applied to non-metallic materials are classified in this class if they are applicable to metal and cannot be classified fully in another class.
 B21C
MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
 B21C
Subclass index
METAL DRAWING
General methods 1/00
Auxiliary operations 5/00, 9/00
Equipment 3/00, 19/00
METAL EXTRUDING
General methods 23/00
Auxiliary operations 29/00, 33/00, 35/00
Equipment 25/00, 26/00, 27/00
Control 31/00
DETAILS COMMON TO DRAWING AND EXTRUDING OF METAL 43/00
MANUFACTURING NOT OTHERWISE PROVIDED FOR 37/00
AUXILIARY AND ANCILLARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
Reeling 47/00
Other auxiliary operations 45/00, 51/00
Auxiliary equipment 19/00, 49/00
 B21C 1/00 - 
B21C 9/00
Metal drawing (continuous casting B22D 11/00; pressure welding by means of a rolling mill B23K 20/04)
P:40 B21C 1/00
Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
 B21C 1/02
·  Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
 B21C 1/16
·  Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes (bending sheet metal into tubular form by drawing B21D 5/06)
P:60 B21C 3/00
Profiling tools for metal drawing; Combinations of dies and mandrels
P:140 B21C 5/00
Pointing; Push-pointing
P:50 B21C 9/00
Cooling, heating or lubricating drawing material (B21C 3/00 takes precedence)
   
P:30 B21C 19/00
Devices for straightening wire or like work combined with or specially adapted for use in connection with drawing or winding machines or apparatus
 B21C 23/00 - 
B21C 35/00
Metal extruding (continuous casting B22D 11/00)
P:70 B21C 23/00
Extruding metal; Impact extrusion
 B21C 23/01
·  starting from material of particular form or shape, e.g. mechanically pre-treated (B21C 23/22 takes precedence; heat treatment or combinations thereof with mechanical treatments, see appropriate classes)
 B21C 23/02
·  Making uncoated products
 B21C 23/22
·  Making metal-coated products; Making products from two or more metals
P:110 B21C 25/00
Profiling tools for metal extruding
P:150 B21C 26/00
Rams or plungers; Discs therefor  [2]
P:120 B21C 27/00
Containers for metal to be extruded (B21C 29/00 takes precedence)
P:80 B21C 29/00
Cooling or heating work or parts of the extrusion press
P:0 B21C 31/00
Control devices, e.g. for regulating the pressing speed or temperature of metal (B21C 25/00 takes precedence); Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses (measuring devices of more general interest within subclass B21C, see group B21C 51/00)
P:100 B21C 33/00
Feeding extrusion presses with metal to be extruded
P:90 B21C 35/00
Removing work or waste from extruding presses; Drawing-off extruded work (in connection with the extruding of bent tubes or rods B21C 23/02); Cleaning dies, ducts, containers, or mandrels  [2]
   
P:130 B21C 37/00
Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for (by rolling B21B; by working or processing semi-finished sheet metal, profiles, tubes, or wire B21D, B21F; by casting B22; by material-removing machine tools B23; by welding, e.g. cladding or plating, B23K; by grinding or polishing B24; by electroforming C25D 1/00; by drawing or extruding, see the relevant groups); Manufacture of tubes of special shape  [2]
 B21C 37/06
·  of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes (bending sheets for making tubes B21D 5/00; seaming by folding B21D 39/02)
 B21C 37/08
·  ·  Making tubes with welded or soldered seams (involving only a soldering or welding operation B23K)
 B21C 37/083
·  ·  ·  Supply, or operations combined with supply, of strip material
 B21C 37/15
·  ·  Making tubes of special shape; Making the fittings (making heat exchangers B21D 53/02)
P:20 B21C 43/00
Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass
 B21C 45/00 - 
B21C 51/00
Auxiliary operations used in connection with metal working without essentially removing material
P:160 B21C 45/00
Separating mandrels from work or vice versa
P:170 B21C 47/00
Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only (coiling wire into particular forms B21F 3/00; hot coilers in connection with heat-treatment apparatus C21D 9/54)
 B21C 47/02
·  Winding-up or coiling
 B21C 47/24
·  Transferring coils to or from winding apparatus or to or from operative position therein; Preventing uncoiling during transfer
 B21C 47/26
·  Special arrangements with regard to simultaneous or subsequent treatment of the material
 B21C 47/28
·  Drums or other coil-holders (gripping means B21C 47/00)
 B21C 47/34
·  Feeding or guiding devices not specially adapted to a particular type of apparatus
P:180 B21C 49/00
Devices for temporarily accumulating material
P:10 B21C 51/00
Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B-B21F