B
SECTION B — PERFORMING OPERATIONS
  
SHAPING
 B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (casting, powder metallurgy B22; shearing B23D; soldering, welding, flame-cutting B23K; miscellaneous metal-working 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. Combinations of operations covered by different sub-classes are dealt with in B23P. Combinations of operations covered by any particular sub-class with operations covered by other classes, e.g. with operations involving removal of material, are also dealt with in B23P, except that if the operations covered by the other classes are subsidiary to the operations properly covered in a single sub-class of B21 the combination is classified in that sub-class.
  2. Processes of a kind covered by this class but applied to non-metallic materials may be classified here if they are applicable to metal and cannot be classified fully in one other 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; plating B23P 3/06)
 B21B

Note(s)

  1. In this sub-class, the term "rolling" is understood to refer to operations in which plastic deformations occur.
  2. The term "continuous process" as used in this sub-class means one employing a mill train designed to have the workpiece enter one pair of rolls before leaving the preceding pair.

 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

 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 per se B21B, B21C; working or processing of wire B21F; cutting or severing devices or machines in general B26; presses in general B30B)
 B21D

Note(s)

In so far as this sub-class provides for cutting or perforating of sheet metal or other stock material, attention is drawn to the fact that it does not include working of metal foils workable in a manner analogous to paper, which is covered by classes B26, B31.


 B21F
WORKING OR PROCESSING OF WIRE (reducing diameter by rolling B21B; by drawing, auxiliary operations used in connection with metal-working without essentially removing material B21C)

 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 sub-class includes only rolling operations which are specially adapted for use in the manufacture of particular objects and which, so far as the invention is concerned, are not 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 (making particular products by forging or pressing B21K; plating or pressure finishing or surfaces B23P; compacting surfaces by blasting with particulate material B24C 1/10; general features of presses, presses for consolidating scrap B30B; furnaces in general F27)

 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 B23P 3/00)
 B21K

Note(s)

This sub-class includes only forging, pressing, or hammering operations which are specially adapted for use in the manufacture of particular objects and which, so far as the invention is concerned, are not combined with any different metal-working operation unless the latter is a subsidiary operation performed in the same machine.


 B21L
MAKING CHAINS (chains per se F16G)