IPC 7 English version B21F-B21F 45/28

B21F-B21F04528

SECTION B – PERFORMING OPERATIONS; TRANSPORTING

B 21

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)

B 21 F

WORKING 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

Bending wire other than coiling; Straightening wire

Straightening

Undulating

Bending wire-eyes

Coiling wire into particular forms

helically

027

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

externally on a mandrel or the like

internally on a hollow form

to flat spiral

to spirals other than flat, e.g. conical

of interconnected helical springs

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

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

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

by tools adapted also for making connections

11/

Cutting wire (hand cutting tools B26B)

13/

Splitting wire

15/

Connecting 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/

wire with wire

15/

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

15/

with additional connecting elements or material

15/

making use of soldering or welding

15/

wire with sheet metal

17/

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

19/

Metallic 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/

Working or processing wire not otherwise provided for

23/

Feeding 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/

Making barbed wire

27/

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

27/

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

27/

Manufacturing on machines with rotating blades or formers

27/

Manufacturing on twister-gear machines

27/

with additional connecting elements or material at crossings

27/

with soldered or welded crossings

27/

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

27/

Specially bending or deforming free wire ends

27/

for spring mattresses

27/

of meshed work for filters or sieves

27/

of plaster-carrying network

27/

of network for wire-reinforced glass or the like

29/

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

29/

comprising bars or the like connected by wires

31/

Making meshed-ring network from wire

33/

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

33/

Mounting of wire network on frames

33/

Connecting ends of helical springs for mattresses

35/

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

35/

Bending or deforming ends of coil springs to special shape

35/

Making flat springs, e.g. sinus springs

37/

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

37/

or resilient rings, e.g. key-rings

37/

of washers (B21F 37/02 takes precedence)

39/

Making wheel spokes from wire

41/

Making umbrella frames or members from wire

43/

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

45/

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

45/

of clothes hangers

45/

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

45/

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

45/

of loom heddles

45/

of cards for fabric-napping machines

45/

of fishing hooks

45/

of end-pieces for laces or ropes

45/

of devices for fastening or securing purposes

45/

of slide fastener elements

45/

of spring hooks; of spring safety hooks

45/

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

45/

of staples; of belt-fastening elements

45/

of buttons

45/

of "patent-fastener" or press-button type