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IPC 7
B21F-B21F04528

SECTION B – PERFORMING OPERATIONS; TRANSPORTING


B 21MECHANICAL 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)


B 21 FWORKING OR PROCESSING OF WIRE (rolling of metal B21B; by drawing, auxiliary operations used in connection with metal-working without essentially removing material B21C; bundling articles B65B 13/00)


Subclass Index

WIRE WORKING CHARACTERISED BY OPERATIONS PERFORMED 

Bending, straightening; coiling; twisting 

B21F 1/00; B21F 3/00; B21F 7/00 

Upsetting, straining 

B21F 5/00, B21F 9/00 

Cutting, splitting, connecting 

B21F 11/00, B21F 13/00, B21F 15/00 

Articles jacketed or reinforced with wire 

B21F 17/00 

Coating of wire 

B21F 19/00 

Other treatments 

B21F 21/00 

Feeding wire into apparatus 

B21F 23/00 

WIRE WORKING CHARACTERISED BY THE PARTICULAR ARTICLES PRODUCED 

Barbed wire;network, fencing, wire fabrics 

B21F 25/00; B21F 27/00 to B21F 33/00 

Springs, rings 

B21F 35/00, B21F 37/00 

other articles 

B21F 39/00 to B21F 45/00 



Wire working characterised by operations performed


1/

00Bending wire other than coiling; Straightening wire

1/

02.Straightening

1/

04.Undulating

1/

06.Bending wire-eyes


3/

00Coiling wire into particular forms

3/

02.helically

3/

027..with extended ends formed in a special shape, e.g. for clothes-pegs

3/

04..externally on a mandrel or the like

3/

06..internally on a hollow form

3/

08.to flat spiral

3/

10.to spirals other than flat, e.g. conical

3/

12.of interconnected helical springs


5/

00Upsetting wire (in the manufacture of nails or pins B21G 3/12)


7/

00Twisting wire; Twisting wire together (for connections of limited size B21F 15/04)


9/

00Straining wire (straining prestressing wires for concrete E04G 21/12; connections or attachments adapted for straining F16G 11/00)

9/

02.by tools adapted also for making connections


11/

00Cutting wire (hand cutting tools B26B)


13/

00Splitting wire


15/

00Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire (tools for both straining and connecting B21F 9/00; jacketing or reinforcing B21F 17/00; manufacture of wire network B21F 27/00; in making bands B21F 43/00)

15/

02.wire with wire

15/

04..without additional connecting elements or material, e.g. by twisting

15/

06..with additional connecting elements or material

15/

08...making use of soldering or welding

15/

10.wire with sheet metal


17/

00Jacketing or reinforcing articles with wire (by winding B65H 54/00, B65H 81/00; by braiding D04C)


19/

00Metallic coating of wire (by extruding B21C 23/24; by soldering or welding, e.g. cladding or plating, B23K; by other non-mechanical means C23; electroplating C25D)


21/

00Working or processing wire not otherwise provided for


23/

00Feeding wire in wire-working machines or apparatus (applicable also to feeding rods or strips B21D 43/00)


Wire working characterised by the particular articles produced


25/

00Making barbed wire


27/

00Making wire network, i.e. wire nets (meshed-ring network B21F 31/00; in making bands B21F 43/00; using looms D03D)

27/

02.without additional connecting elements or material at crossings, e.g. connected by knitting

27/

04..Manufacturing on machines with rotating blades or formers

27/

06..Manufacturing on twister-gear machines

27/

08.with additional connecting elements or material at crossings

27/

10..with soldered or welded crossings

27/

12.Making special types or portions of network by methods or means specially adapted therefor

27/

14..Specially bending or deforming free wire ends

27/

16..for spring mattresses

27/

18..of meshed work for filters or sieves

27/

20..of plaster-carrying network

27/

22..of network for wire-reinforced glass or the like


29/

00Making fencing or like material made partly of wire (B21F 25/00, B21F 27/00 take precedence) [2]

29/

02.comprising bars or the like connected by wires


31/

00Making meshed-ring network from wire


33/

00Tools or devices specially designed for handling or processing wire fabrics or the like

33/

02.Mounting of wire network on frames

33/

04.Connecting ends of helical springs for mattresses


35/

00Making springs from wire (by coiling wire B21F 3/00; making resilient rings B21F 37/02)

35/

02.Bending or deforming ends of coil springs to special shape

35/

04.Making flat springs, e.g. sinus springs


37/

00Manufacture of rings from wire (in chain making B21L; producing bead-rings or bead-cores for tyres B29D 30/48)

37/

02.or resilient rings, e.g. key-rings

37/

04.of washers (B21F 37/02 takes precedence)


39/

00Making wheel spokes from wire


41/

00Making umbrella frames or members from wire


43/

00Making bands, e.g. bracelets, or wire (making chains B21L; using looms D03D)


45/

00Wire-working in the manufacture of other particular articles (of pins, needles, nails, hairpins B21G; of chains B21L)

45/

02.of clothes hangers

45/

04.of elements, e.g. levers or links, for bottle stoppers

45/

06.of flexible shafts or hollow conduits, e.g. for Bowden mechanisms

45/

08.of loom heddles

45/

10.of cards for fabric-napping machines

45/

12.of fishing hooks

45/

14.of end-pieces for laces or ropes

45/

16.of devices for fastening or securing purposes

45/

18..of slide fastener elements

45/

20..of spring hooks; of spring safety hooks

45/

22..of paper fasteners or clips (staples B21F 45/24)

45/

24..of staples; of belt-fastening elements

45/

26..of buttons

45/

28...of "patent-fastener" or press-button type


  
 

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