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.
 B21G
MAKING NEEDLES, PINS, OR NAILS
P:0 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 - 
B21G 1/10

Note(s)

Group B21G 1/12 takes precedence over groups B21G 1/02-B21G 1/10.

 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
P:30 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
P:10 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
P:20 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