|  | B |
SECTION B — PERFORMING OPERATIONS; TRANSPORTING

|  | B01 - B07 |
Subsection index
LIQUID/LIQUID, LIQUID/GAS OR GAS/GAS SEPARATION |
Method |
General operations | B01D
by centrifugal force, using centrifuges or free-vortex apparatus | B01D
using magnetic or electrostatic effect | B03C
Apparatus |
General operations | B01D
by centrifugal force, using centrifuges or free-vortex apparatus | B04B, B04C
using magnetic or electrostatic effect | B03C
SOLID/LIQUID OR SOLID/GAS SEPARATION |
Method |
General operations | B01D
by centrifugal force | B01D
using centrifuges or free-vortex apparatus | B01D
using magnetic or electrostatic effect | B03C
Apparatus |
General operations | B01D
by centrifugal force | B01D
using centrifuges or free-vortex apparatus | B04B, B04C
using magnetic or electrostatic effect | B03C
SOLID/SOLID SEPARATION |
Method |
Dry methods |
material in bulk | B07B
Individual sorting | B07C
Screening, sifting, pneumatic sorting | B07B
using pneumatic tables or jigs | B03B
by magnetic or electrostatic effect | B03C
by centrifugal force | B07B
using centrifuges or free-vortex apparatus | B07B
Wet methods |
General operations | B03B
flotation, differential sedimentation | B03D
screening | B07B
Combinations Dry methods - wet methods | B03B
Apparatus |
Dry methods |
material in bulk | B07B
Individual sorting | B07C
Screening, sifting, pneumatic sorting | B07B
using pneumatic tables or jigs | B03B
by magnetic or electrostatic effect | B03C
by centrifugal force | B07B
using centrifuges or free-vortex apparatus | B04B, B04C
Wet methods |
General operations | B03B
flotation, differential sedimentation | B03D
screening | B07B
Combinations Dry methods - wet methods | B03B

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.

|  | 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

|  | B21F 1/00 - B21F 23/00 |
Wire working characterised by operations performed

P:180 |  | B21F 1/00 |
Bending wire other than coiling; Straightening wire

|  | B21F 1/02 |
· | Straightening

|  | B21F 1/04 |
· | Undulating

|  | B21F 1/06 |
· | Bending wire-eyes

P:10 |  | B21F 3/00 |
Coiling wire into particular forms

|  | B21F 3/02 |
· | helically

|  | B21F 3/027 |
· · | with extended ends formed in a special shape, e.g. for clothes-pegs

|  | B21F 3/04 |
· · | externally on a mandrel or the like

|  | B21F 3/06 |
· · | internally on a hollow form

|  | B21F 3/08 |
· | to flat spiral

|  | B21F 3/10 |
· | to spirals other than flat, e.g. conical

|  | B21F 3/12 |
· | of interconnected helical springs

P:170 |  | B21F 5/00 |
Upsetting wire (in the manufacture of nails or pins Fulltext... Hierarchy... Expanded...B21G 3/12)

P:150 |  | B21F 7/00 |
Twisting wire; Twisting wire together (for connections of limited size Fulltext... Hierarchy... Expanded...B21F 15/04)

P:120 |  | B21F 9/00 |
Straining wire (straining prestressing wires for concrete Fulltext... Hierarchy... Expanded...E04G 21/12; connections or attachments adapted for straining Fulltext... Hierarchy... Expanded...F16G 11/00)

|  | B21F 9/02 |
· | by tools adapted also for making connections

P:200 |  | B21F 11/00 |
Cutting wire (hand cutting tools Fulltext... Hierarchy... Expanded...B26B)

P:190 |  | B21F 13/00 |
Splitting wire

P:140 |  | B21F 15/00 |
Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire (tools for both straining and connecting Fulltext... Hierarchy... Expanded...B21F 9/00; jacketing or reinforcing Fulltext... Hierarchy... Expanded...B21F 17/00; manufacture of wire network Fulltext... Hierarchy... Expanded...B21F 27/00; in making bands Fulltext... Hierarchy... Expanded...B21F 43/00)

|  | B21F 15/02 |
· | wire with wire

|  | B21F 15/04 |
· · | without additional connecting elements or material, e.g. by twisting

|  | B21F 15/06 |
· · | with additional connecting elements or material

|  | B21F 15/08 |
· · · | making use of soldering or welding

|  | B21F 15/10 |
· | wire with sheet metal

P:130 |  | B21F 17/00 |
Jacketing or reinforcing articles with wire (by winding Fulltext... Hierarchy... Expanded...B65H 54/00, Fulltext... Hierarchy... Expanded...B65H 81/00; by braiding Fulltext... Hierarchy... Expanded...D04C)

P:160 |  | B21F 19/00 |
Metallic coating of wire (by extruding Fulltext... Hierarchy... Expanded...B21C 23/24; by soldering or welding, e.g. cladding or plating, Fulltext... Hierarchy... Expanded...B23K; by other non-mechanical means Fulltext... Hierarchy... Expanded...C23; electroplating Fulltext... Hierarchy... Expanded...C25D)

P:210 |  | B21F 21/00 |
Working or processing wire not otherwise provided for

P:220 |  | B21F 23/00 |
Feeding wire in wire-working machines or apparatus (applicable also to feeding rods or strips Fulltext... Hierarchy... Expanded...B21D 43/00)

|  | B21F 25/00 - B21F 45/00 |
Wire working characterised by the particular articles produced

P:60 |  | B21F 25/00 |
Making barbed wire

P:50 |  | B21F 27/00 |
Making wire network, i.e. wire nets (meshed-ring network Fulltext... Hierarchy... Expanded...B21F 31/00; in making bands Fulltext... Hierarchy... Expanded...B21F 43/00; using looms Fulltext... Hierarchy... Expanded...D03D)

|  | B21F 27/02 |
· | without additional connecting elements or material at crossings, e.g. connected by knitting

|  | B21F 27/04 |
· · | Manufacturing on machines with rotating blades or formers

|  | B21F 27/06 |
· · | Manufacturing on twister-gear machines

|  | B21F 27/08 |
· | with additional connecting elements or material at crossings

|  | B21F 27/10 |
· · | with soldered or welded crossings

|  | B21F 27/12 |
· | Making special types or portions of network by methods or means specially adapted therefor

|  | B21F 27/14 |
· · | Specially bending or deforming free wire ends

|  | B21F 27/16 |
· · | for spring mattresses

|  | B21F 27/18 |
· · | of meshed work for filters or sieves

|  | B21F 27/20 |
· · | of plaster-carrying network

|  | B21F 27/22 |
· · | of network for wire-reinforced glass or the like

P:70 |  | B21F 29/00 |
Making fencing or like material made partly of wire (Fulltext... Hierarchy... Expanded...B21F 25/00, Fulltext... Hierarchy... Expanded...B21F 27/00 take precedence) [2]

|  | B21F 29/02 |
· | comprising bars or the like connected by wires

P:30 |  | B21F 31/00 |
Making meshed-ring network from wire

P:0 |  | B21F 33/00 |
Tools or devices specially designed for handling or processing wire fabrics or the like

|  | B21F 33/02 |
· | Mounting of wire network on frames

|  | B21F 33/04 |
· | Connecting ends of helical springs for mattresses

P:90 |  | B21F 35/00 |
Making springs from wire (by coiling wire Fulltext... Hierarchy... Expanded...B21F 3/00; making resilient rings Fulltext... Hierarchy... Expanded...B21F 37/02)

|  | B21F 35/02 |
· | Bending or deforming ends of coil springs to special shape

|  | B21F 35/04 |
· | Making flat springs, e.g. sinus springs

P:80 |  | B21F 37/00 |
Manufacture of rings from wire (in chain making Fulltext... Hierarchy... Expanded...B21L; producing bead-rings or bead-cores for tyres Fulltext... Hierarchy... Expanded...B29D 30/48)

|  | B21F 37/02 |
· | or resilient rings, e.g. key-rings

|  | B21F 37/04 |
· | of washers (Fulltext... Hierarchy... Expanded...B21F 37/02 takes precedence)

P:100 |  | B21F 39/00 |
Making wheel spokes from wire

P:20 |  | B21F 41/00 |
Making umbrella frames or members from wire

P:40 |  | B21F 43/00 |
Making bands, e.g. bracelets, or wire (making chains Fulltext... Hierarchy... Expanded...B21L; using looms Fulltext... Hierarchy... Expanded...D03D)

P:110 |  | B21F 45/00 |
Wire-working in the manufacture of other particular articles (of pins, needles, nails, hairpins Fulltext... Hierarchy... Expanded...B21G; of chains Fulltext... Hierarchy... Expanded...B21L)

|  | B21F 45/02 |
· | of clothes hangers

|  | B21F 45/04 |
· | of elements, e.g. levers or links, for bottle stoppers

|  | B21F 45/06 |
· | of flexible shafts or hollow conduits, e.g. for Bowden mechanisms

|  | B21F 45/08 |
· | of loom heddles

|  | B21F 45/10 |
· | of cards for fabric-napping machines

|  | B21F 45/12 |
· | of fishing hooks

|  | B21F 45/14 |
· | of end-pieces for laces or ropes

|  | B21F 45/16 |
· | of devices for fastening or securing purposes

|  | B21F 45/18 |
· · | of slide fastener elements

|  | B21F 45/20 |
· · | of spring hooks; of spring safety hooks

|  | B21F 45/22 |
· · | of paper fasteners or clips (staples Fulltext... Hierarchy... Expanded...B21F 45/24)

|  | B21F 45/24 |
· · | of staples; of belt-fastening elements

|  | B21F 45/26 |
· · | of buttons

|  | B21F 45/28 |
· · · | of "patent-fastener" or press-button type