|  | B |
SECTION B — PERFORMING OPERATIONS; TRANSPORTING

SHAPING

|  | B21 |
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (casting, powder metallurgy Fulltext... Hierarchy... Expanded...B22; shearing Fulltext... Hierarchy... Expanded...B23D; working of metal by the action of a high concentration of electric current Fulltext... Hierarchy... Expanded...B23H; soldering, welding, flame-cutting Fulltext... Hierarchy... Expanded...B23K; other working of metal Fulltext... Hierarchy... Expanded...B23P; punching sheet material in general Fulltext... Hierarchy... Expanded...B26F; processes for changing of physical properties of metals Fulltext... Hierarchy... Expanded...C21D, Fulltext... Hierarchy... Expanded...C22F; electroforming Fulltext... Hierarchy... Expanded...C25D 1/00)

|  | B21 |
Note(s) This class does not cover: combinations of operations covered by different subclasses of class Fulltext... Hierarchy... Expanded...B21, which are covered by subclass Fulltext... Hierarchy... Expanded...B23P; combinations of operations covered by any particular subclass of class Fulltext... Hierarchy... Expanded...B21 with operations covered by other classes, e.g. with operations involving removal of material, which are also covered by subclass Fulltext... Hierarchy... Expanded...B23P, except that if the operations covered by the other classes are subsidiary to the operations properly covered by a single subclass of Fulltext... Hierarchy... Expanded...B21 the combination is classified in that subclass. 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 Fulltext... Hierarchy... Expanded...B21, see Fulltext... Hierarchy... Expanded...B21C; bending by rolling Fulltext... Hierarchy... Expanded...B21D; manufacture of particular objects, e.g. screws, wheels, rings, barrels, balls, by rolling Fulltext... Hierarchy... Expanded...B21H; pressure welding by means of a rolling mill Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...B21B, Fulltext... Hierarchy... Expanded...B21C; working or processing of wire Fulltext... Hierarchy... Expanded...B21F; cutting or severing devices or machines in general Fulltext... Hierarchy... Expanded...B26; presses in general Fulltext... Hierarchy... Expanded...B30B)

|  | B21D |
Note(s) This subclass covers cutting or perforating of sheet metal or other stock material. This subclass does not cover the working of metal foils in a manner analogous to the working of paper, which is covered by classes Fulltext... Hierarchy... Expanded...B26, Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...B21B; by drawing, auxiliary operations used in connection with metal-working without essentially removing material Fulltext... Hierarchy... Expanded...B21C; bundling articles Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...B21B; making particular products by forging or pressing Fulltext... Hierarchy... Expanded...B21K; cladding or plating Fulltext... Hierarchy... Expanded...B23K; finishing surfaces by hammering Fulltext... Hierarchy... Expanded...B23P 9/04; compacting surfaces by blasting with particulate material Fulltext... Hierarchy... Expanded...B24C 1/10; general features of presses, presses for consolidating scrap Fulltext... Hierarchy... Expanded...B30B; furnaces in general Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...B21D; processing wire Fulltext... Hierarchy... Expanded...B21F; making pins, needles or nails Fulltext... Hierarchy... Expanded...B21G; making particular articles by rolling Fulltext... Hierarchy... Expanded...B21H; forging machines, pressing machines, hammering machines, in general Fulltext... Hierarchy... Expanded...B21J; making chains Fulltext... Hierarchy... Expanded...B21L; plating Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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