B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
  
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.
 B21B
ROLLING OF METAL (auxiliary operations used in connection with metal-working operations covered in B21, see B21C; bending by rolling B21D; manufacture of particular objects, e.g. screws, wheels, rings, barrels, balls, by rolling B21H; pressure welding by means of a rolling mill B23K 20/04)
 B21B

Note(s)

In this subclass, the following terms or expressions are used with the meanings indicated:

  • "rolling" means rolling operations in which plastic deformations occur;
  • "continuous process" means a process employing a mill train designed to have the workpiece enter one pair of rolls before leaving the preceding pair. [2]

 B21B
Subclass index
METAL ROLLING IN GENERAL
General methods or apparatus 1/00, 11/00, 13/00, 15/00
Control or handling 35/00, 37/00, 38/00, 39/00, 41/00
Safety, cooling, maintenance 28/00, 33/00, 43/00
Details of rolling mills 27/00, 29/00, 31/00
METAL ROLLING UNDER SPECIAL CONDITIONS 9/00
AUXILIARY OPERATIONS PERFORMED IN CONNECTION WITH METAL ROLLING 15/00, 45/00, 47/00
ROLLING SPECIAL ALLOYS 3/00
ROLLING TO PRODUCE PARTICULAR SHAPES
Tubes
rolling methods 17/00 - 23/00
mandrels, accessories 25/00
Extending closed shapes 5/00
 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
 B21D
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING (operations of the kind involved in the manufacture of such products B21B, B21C; working or processing of wire B21F; cutting or severing devices or machines in general B26; presses in general B30B)
 B21D

Note(s)

  1. This subclass covers cutting or perforating of sheet metal or other stock material.
  2. This subclass does not cover the working of metal foils in a manner analogous to the working of paper, which is covered by classes B26, B31.
 B21D
Subclass index
TREATMENT CHARACTERISED BY FUNCTION
Straightening 1/00, 3/00, 25/00
Bending 11/00
of sheets 5/00, 13/00
of rods 7/00, 13/00
of tubes 9/00, 15/00
Twisting 11/00
Corrugating or grooving or bending into waves 13/00, 15/00, 17/00
Punching, stamping, deep- drawing, spinning, high-energy forming 22/00 - 28/00
EDGE TREATMENT; CONNECTION OF PARTS 19/00, 41/00; 39/00
OTHER METHODS 25/00, 31/00, 41/00
COMBINED PROCESSES 21/00, 35/00
HANDLING 43/00, 45/00
OTHER AUXILIARY OPERATIONS 33/00
TOOLS 37/00
SAFETY 55/00
SPECIAL TREATMENT FOR THE MANUFACTURE OF SPECIFIED ARTICLES 47/00 - 53/00
 B21F
WORKING OR PROCESSING OF WIRE (rolling of metal B21B; by drawing, auxiliary operations used in connection with metal-working without essentially removing material B21C; bundling articles B65B 13/00)
 B21F
Subclass index
WIRE WORKING CHARACTERISED BY OPERATIONS PERFORMED
Bending, straightening; coiling; twisting 1/00; 3/00; 7/00
Upsetting, straining 5/00, 9/00
Cutting, splitting, connecting 11/00, 13/00, 15/00
Articles jacketed or reinforced with wire 17/00
Coating of wire 19/00
Other treatments 21/00
Feeding wire into apparatus 23/00
WIRE WORKING CHARACTERISED BY THE PARTICULAR ARTICLES PRODUCED
Barbed wire;network, fencing, wire fabrics 25/00; 27/00 - 33/00
Springs, rings 35/00, 37/00
other articles 39/00 - 45/00
 B21G
MAKING NEEDLES, PINS, OR NAILS
 B21H
MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS (essentially from sheet metal B21D)
 B21H

Note(s)

This subclass covers only rolling operations which are specially adapted for use in the manufacture of particular objects and which are not essentially combined with any different metal-working operation unless the latter is a subsidiary operation performed in the same machine.

 B21J
FORGING; HAMMERING; PRESSING; RIVETING; FORGE FURNACES (rolling of metal B21B; making particular products by forging or pressing B21K; cladding or plating B23K; finishing surfaces by hammering B23P 9/04; compacting surfaces by blasting with particulate material B24C 1/10; general features of presses, presses for consolidating scrap B30B; furnaces in general F27)
 B21J
Subclass index
PREPARING METAL STOCK 1/00
FORGING; HAMMERING; PRESSING
General methods, equipment therefor 5/00
Machines, presses, hammers 7/00 - 13/00
Lubrication 3/00
Furnaces 17/00
RIVETING 15/00
OTHER BLACKSMITHS' REQUISITES 19/00
 B21K
MAKING FORGED OR PRESSED PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS, WHEELS (making particular articles by working sheet metal without essentially removing material B21D; processing wire B21F; making pins, needles or nails B21G; making particular articles by rolling B21H; forging machines, pressing machines, hammering machines, in general B21J; making chains B21L; plating B23K)
 B21K

Note(s)

This subclass covers only forging, pressing, or hammering operations which are specially adapted for use in the manufacture of particular objects and which are not essentially combined with any different metal-working operation unless the latter is a subsidiary operation performed in the same machine.

 B21K
Subclass index
MAKING MACHINE ELEMENTS OR TOOLS 1/00, 3/00, 5/00, 19/00
MAKING RAILS 7/00, 9/00
MAKING LOCKSMITHS' OR BLACKSMITHS' GOODS 13/00, 15/00
MAKING OTHER ARTICLES 7/00, 11/00, 17/00, 21/00, 23/00
UNITING OF COMPONENTS 25/00
ACCESSORIES, AUXILIARY DEVICES 27/00, 29/00, 31/00
 B21L
MAKING CHAINS (chains in general F16G)
 B21L
Subclass index
GENERAL METHODS OF WORKING
Chains made from individual links 1/00, 3/00, 7/00, 9/00
Chains with integral links 5/00
METHODS FOR MAKING SPECIAL CHAINS OR PARTS THEREOF 11/00, 13/00
TOOLS FOR MANUFACTURE OR REPAIR 19/00, 21/00
FINISHING 15/00
OTHER MANUFACTURE 17/00