|  | B |
SECTION B — PERFORMING OPERATIONS

SHAPING

|  | B21 |
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (casting, powder metallurgy Fulltext... Hierarchy... Expanded...B22; shearing Fulltext... Hierarchy... Expanded...B23D; soldering, welding, flame-cutting Fulltext... Hierarchy... Expanded...B23K; miscellaneous metal-working 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) Combinations of operations covered by different sub-classes are dealt with in Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...B23P, except that if the operations covered by the other classes are subsidiary to the operations properly covered in a single sub-class of Fulltext... Hierarchy... Expanded...B21 the combination is classified in that sub-class. 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.

|  | B21F |
WORKING OR PROCESSING OF WIRE (reducing diameter by rolling Fulltext... Hierarchy... Expanded...B21B; by drawing, auxiliary operations used in connection with metal-working without essentially removing material Fulltext... Hierarchy... Expanded...B21C)

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

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

|  | B21F 1/02 |
· | Straightening

|  | B21F 1/04 |
· | Undulating

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

|  | 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

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

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

|  | 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

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

|  | B21F 13/00 |
Splitting wire

|  | 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

|  | 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)

|  | B21F 19/00 |
Metallic coating of wire (by extruding Fulltext... Hierarchy... Expanded...B21C 23/24; by welding technique Fulltext... Hierarchy... Expanded...B23K; plating Fulltext... Hierarchy... Expanded...B23P, Fulltext... Hierarchy... Expanded...C25D; by other non-mechanical means Fulltext... Hierarchy... Expanded...C23)

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

|  | 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

|  | B21F 25/00 |
Making barbed wire

|  | 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

|  | 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)

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

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

|  | 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

|  | 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

|  | B21F 37/00 |
Manufacture of rings from wire (in chain making Fulltext... Hierarchy... Expanded...B21L; making of tyre beads Fulltext... Hierarchy... Expanded...B29H 17/32)

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

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

|  | B21F 39/00 |
Making wheel spokes from wire

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

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

|  | 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