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WORKING AND PROCESSING OF WIRE ({ reducing diameter by} rolling of metal B21B; by drawing, auxiliary operations used in connection with metal working without essentially removing material B21C)
Definition statement
This subclass/group covers:

Methods as well as devices relating to working or processing of metal wire, i.e. modifying, not manufacturing the wire:

Wire working methods characterized by their technology (e.g. bending, coiling, etc). These aspects are covered by B21F 1/00-B21F 23/005

Wire working methods characterized by the product made (e.g. barbed wire, wire network etc). These aspects are covered by B21F 25/00-B21F 45/28

Miscellaneous wire working and processing. These aspects are covered by B21F 99/00

References relevant to classification in this subclass
This subclass/group does not cover:

Metal rolling methods of mills for making wire or material of like small cross-section

Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing

Devices for straightening wire or like work combined with or specially adapted for use in connection with drawing or winding machines or apparatus

Devices for cleaning metal products, e.g. wires , combined with or specially adapted for use with machines or apparatus provided in B21C

Manufacture of bars or wires by metal working

Winding-up, coiling or winding-off metal wires, metal band or other flexible metal material characterised by features relevant to metal processing only

Informative references
Attention is drawn to the following places, which may be of interest for search:

Semi-conductor devices; electric solid state devices not other wise provided for

Building

E04

Jewellery; Bracelets: Other personal ornaments; coins

Making chains

Making needle, pins or nails

Working or processing of sheet metal or metal tubes, rods or profiles without essentially removing material; punching

Making alloys containing metallic or non-metallic fibres or filaments

Bending wire other than coiling; Straightening wire
Definition statement
This subclass/group covers:

Methods and devices for bending wire, i.e. forming discrete angles, as well as straightening, i.e. removing distortions.

media0.jpg
Source: WO9324254

Coiling wire into particular forms
Definition statement
This subclass/group covers:

Methods and devices for coiling wire, i.e. forming a continuous angle along the wire length.

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Source: JP58192643

Informative references
Attention is drawn to the following places, which may be of interest for search:

Making springs from wire

Upsetting wire { or pressing operations affecting the wire cross-section}(in the manufacture of nails or pins B21G 3/12)
Definition statement
This subclass/group covers:

Methods and devices for enlarging a wire cross-section by applying an axial force.

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Source: US2004261487

Informative references
Attention is drawn to the following places, which may be of interest for search:

Methods for forging, hammering or pressing to perform upsetting

Twisting wire; Twisting wire together (for connections of limited size B21F 15/04)
Definition statement
This subclass/group covers:

Methods and devices for continuously twisting of wire, i.e. twisting of a wire of theoretically unlimited length.

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Source: EP1693126

References relevant to classification in this group
This subclass/group does not cover:

Electrically-conductive connections between two or more conductive members in direct contact effected by twisting wire

Connecting wire with wire without additional connecting element or material, e.g. by twisting

Informative references
Attention is drawn to the following places, which may be of interest for search:

Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing dynamo-electric machines

Producing bead-rings or bead-cores

Jacketing or reinforcing articles with wires

Wire working in the manufacture of flexible shafts or hollow conduits, e.g. for Bowden mechanisms

Straining wire (straining pre-stressing wires for concrete E04G 21/12; connections or attachments adapted for straining F16G 11/00; {bundling machines or tools B65B 13/00})
Definition statement
This subclass/group covers:

Methods and devices for straining wires, i.e. tensioning wires with or without plastic deformation.

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Source: WO9429046

References relevant to classification in this group
This subclass/group does not cover:

Connections or attachments adapted for straining of cables, ropes or wire

Informative references
Attention is drawn to the following places, which may be of interest for search:

Straightening wire

Hand tools for cable tie applications

Bundling machines or tools

Pre-stressing building material

Cutting wire (hand cutting tools B26B)
Definition statement
This subclass/group covers:

Methods and devices for cutting wire

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Source: US6427433

References relevant to classification in this group
This subclass/group does not cover:

Cutting wire nets

Hand operated metal-shearing devices for cutting wires

Informative references
Attention is drawn to the following places, which may be of interest for search:

Machines or devices for shearing or cutting profiled stock

Cutting

Hand-held cutting tools not otherwise provided for

Hand cutting tools using wires as cutting means

Splitting wire
Definition statement
This subclass/group covers:

Methods and devices for splitting, i.e. separating wire portions lengthwise.

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Source: GB786261

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){ bundling machines or tools B65B 13/00; for semiconductors H01L 24/85}
Definition statement
This subclass/group covers:

Methods and devices for connecting wire to wire or other metallic material; connecting parts by means of wire.

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Source: US5224955

References relevant to classification in this group
This subclass/group does not cover:

Making wire networks with additional connecting elements or material at crossings

Making wire networks with welded or soldered crossings

Straining wire by tools also adapted for making connections

Applying and securing binding material around articles using strings, wires, strips, bands, tapes

Attaching or detaching leads of semi-conductors

Informative references
Attention is drawn to the following places, which may be of interest for search:

Making bands, e.g. bracelets of wire

Jacketing or reinforcing articles with wire

Soldering or unsoldering; Welding

Jacketing or reinforcing articles with wire (by winding B65H 54/00, B65H 81/00; by braiding D04C)
Definition statement
This subclass/group covers:

Methods and devices for jacketing articles with wire, i.e. winding one or more wire around an article (which article can be a wire); reinforcing articles with wire (e.g. reinforcing paper with wire).

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Source: GB1324072

References relevant to classification in this group
This subclass/group does not cover:

Jacketing or reinforcing of articles with wires by winding or coiling

Jacketing or reinforcing of articles with wires by braiding

Making alloys containing metallic or non-metallic fibres or filaments by forming the fibres or filaments into a preformed structure from wires or filaments only

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)
Definition statement
This subclass/group covers:

Methods and devices for coating metal wires, e.g. by using a metal band.

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Source: US2009311553

References relevant to classification in this group
This subclass/group does not cover:

Coating of wire by extrusion

Coating of wire by soldering or welding, e.g. cladding or plating

Coating of wire by other non-mechanical means

C23

Coating of wire by electroplating

Feeding wire in wire-working machines or apparatus (applicable also to feeding rods or strips B21D 43/00)
Definition statement
This subclass/group covers:

Methods and devices for feeding wire.

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Source: EP0824982

References relevant to classification in this group
This subclass/group does not cover:

Guiding wire

Feeding wire in wire-working machines, said machines also being applicable to feed rods or strips

Informative references
Attention is drawn to the following places, which may be of interest for search:

Forwarding filamentary material

Arrangements for moving, supporting or positioning work specially adapted for metal rolling mills

Making barbed wire
Definition statement
This subclass/group covers:

Methods and devices for making barbed wires or barbed tapes.

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Source: GB2300206

Informative references
Attention is drawn to the following places, which may be of interest for search:

Barbed wires

Making wire network, i.e. wire nets (meshed-ring network B21F 31/00; in making bands B21F 43/00; using looms D03D)
Definition statement
This subclass/group covers:

Methods and devices for making wire networks, e.g. fences or reinforcements for concrete.

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Source: EP2153800

References relevant to classification in this group
This subclass/group does not cover:

Making fencing or the like partly of wire

Making meshed ring network from wire

Making bands from wire

Making other particular articles from wire

Making wire network using looms

Informative references
Attention is drawn to the following places, which may be of interest for search:

Bending wire networks

Connecting wire to wire or other metallic material

Soldering or unsoldering; Welding

Reinforcing elements, e.g. for concrete

Fencing

Making fencing or like material made partly of wire (B21F 25/00, B21F 27/00 take precedence)
Definition statement
This subclass/group covers:

Methods and devices for making structures partly of wire and partly of other elements, e.g. fences reinforced with bars.

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Source: US4651975

Making meshed-ring network from wire
Definition statement
This subclass/group covers:

Methods and devices for making networks, e.g. fences, obtained by interlacing rings of metal wires, e.g. fences for securing rocks.

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Source: EP1662047

Special rules of classification within this subclass/group

Interlaced rings can be of non-circular shape.

Tools or devices specially designed for handling or processing wire fabrics or the like
Definition statement
This subclass/group covers:

Methods and devices for handling or processing wire fabrics, i.e. further handling or processing of products manufactured from wire (e.g. connecting wire products, coiling wire products, etc).

media15.jpg
Source: US3814144

Informative references
Attention is drawn to the following places, which may be of interest for search:

Bending of wire networks

Upholstery

B68

Making springs from wire (by coiling wire B21F 3/00; making resilient rings B21F 37/02)
Definition statement
This subclass/group covers:

Methods and devices for making springs from wire.

Miscellaneous spring manufacturing processes, not necessarily starting from wire, not otherwise provided for.

media16.jpg
Source: EP1533053

Informative references
Attention is drawn to the following places, which may be of interest for search:

Springs

Bending wire other than coiling

Manufacture of resilient rings

Manufacture of rings from wire (in chain making B21L; making of tyre beads B29D 30/48)
Definition statement
This subclass/group covers:

Methods and devices for the manufacture of rings from wire.

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Source: EP1504828

References relevant to classification in this group
This subclass/group does not cover:

Manufacture of rings in chain making

Manufacture of rings in tyre beads making

Making wheel spokes from wire
Definition statement
This subclass/group covers:

Methods and devices for the manufacture of wheel spokes from wire.

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Source: GB357081

Making umbrella frames or members from wire
Definition statement
This subclass/group covers:

Methods and devices for the manufacture of umbrella frames or members from wire.

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Source: DE177303

Making bands, e.g. bracelets, or wire (making chains B21L; using looms D03D)
Definition statement
This subclass/group covers:

Methods and devices for the manufacture of bands or bracelets from wire.

media20.jpg
Source: GB2079336

References relevant to classification in this group
This subclass/group does not cover:

Making bands using looms

Informative references
Attention is drawn to the following places, which may be of interest for search:

Bracelets

Making chains

Wire-working in the manufacture of other particular articles (of pins, needles, nails, hairpins B21G; of chains B21L; { for semiconductor devices H01L 24/42})
Definition statement
This subclass/group covers:

Methods and devices for the manufacture of all wire products if neither classifiable in a sub-group of B21F 45/00 nor in a class ranging from B21F 25/00-B21F 43/00 nor in a specific product class.

media21.jpg
Source: US2002198561

References relevant to classification in this group
This subclass/group does not cover:

Wire working in the manufacture of pins, needles, mails, hairpins

Wire working in the manufacture of chains

Wire working for semi-conductor devices

Subject matter not provided for in other groups of this subclass
Definition statement
This subclass/group covers:

Subject-matter not provided for in other groups of this subclass concerning the working and processing of wire, such as e.g. heat treatments specifically adapted for wires.

This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013