B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
  
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 of class B21 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.
 B21G
MAKING NEEDLES, PINS, OR NAILS
 B21G 1/00
Making needles used for performing operations (forming heads on pin-like needles B21G 3/12; making U-shaped hairpins B21G 7/04)
 B21G 1/02
·  of needles with eyes, e.g. sewing-needles, sewing-awls
 B21G 1/04
·  ·  of needles specially adapted for use in machines or tools
 B21G 1/06
·  of needles with hook or barb, e.g. crochet hooks
 B21G 1/08
·  of hollow needles or needles with hollow end, e.g. hypodermic needles, larding-needles (B21G 1/10 takes precedence)
 B21G 1/10
·  equipped with locking means for the material to be drawn through, e.g. for repairing tubeless tyres
 B21G 1/12
·  Securing, cleaning-off burrs, reconditioning, polishing, grinding (takes precedence over B21G 1/02-B21G 1/10)
 B21G 3/00
Making pins, nails, or the like (of pins with individual caps B21G 5/00; of U-like shape B21G 7/00; of split-pins B21G 7/08)  [2]
 B21G 3/02
·  of pins of the kind used in the tailoring trade or the household
 B21G 3/04
·  ·  with locking or shielding device for the pin point, e.g. safety-pins
 B21G 3/06
·  of nails with shoulders
 B21G 3/08
·  of nails with head and two or more shanks or split shanks
 B21G 3/10
·  of undulated nails or pins
 B21G 3/12
·  Upsetting; Forming heads
 B21G 3/14
·  Reducing diameter of parts otherwise than by rolling
 B21G 3/16
·  Pointing; with or without cutting
 B21G 3/18
·  by operations not restricted to one of the groups B21G 3/12-B21G 3/16 (B21G 3/06-B21G 3/10 take precedence)
 B21G 3/20
·  ·  from wire of indefinite length (by rolling B21G 3/30)
 B21G 3/22
·  ·  ·  in pairs arranged head to head
 B21G 3/24
·  ·  ·  by simultaneously forming the head of one nail and the adjacent point of another
 B21G 3/26
·  ·  by cutting from strip or sheet material
 B21G 3/28
·  ·  by forging or pressing
 B21G 3/30
·  ·  by rolling
 B21G 3/32
·  Feeding material to be worked to nail or pin making machines
 B21G 5/00
Making pins or nails with attached caps or with coated heads
 B21G 5/02
·  of drawing-pins or pins of drawing-pin type
 B21G 7/00
Making pins of U-like shape or split-pins (of paper fasteners or staples B21D 53/46, B21F 45/16)
 B21G 7/02
·  of U-like shape
 B21G 7/04
·  ·  of hairpins
 B21G 7/06
·  ·  ·  of undulated hairpins
 B21G 7/08
·  of split-pins, e.g. cotter-pins