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MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
Definition statement
This subclass/group covers:

The methods and devices for working metal as follows:

Metal drawing (covered by B21C 1/00 - B21C 19/00)

Metal extrusion (covered by B21C 23/00 - B21C 35/00)

Methods for manufacturing metal sheets, bars, wires tubes or the like. (covered by B21C 37/00)

Devices for cleaning metal products adapted for use with machines of this subclass (covered by B21C 43/00)

Separating mandrels from work (covered by B21C 45/00)

Winding-up, coiling, winding-off metal wire or metal band (covered by B21C 47/00)

Devices for temporarily accumulating material (covered by B21C 49/00)

Measuring, gauging, indicating, counting, marking devices adapted for use with subclasses B21B to B21F (covered by B21C 51/00)

Other subject-matter concerning the manufacture of metal sheets, wire, rods, tubes or profiles otherwise than by rolling as well as other subject-matter concerning auxiliary operations used in connection with metal-working without essentially removing material (covered by B21C 99/00).

References relevant to classification in this group
This subclass/group does not cover:
Working or processing of sheet metal or metal tubes, rods or profiles
Informative references
Attention is drawn to the following places, which may be of interest for search:
Methods for manufacturing metal sheets, bars, wires tubes or the like by rolling
Devices for cleaning metal sheet from scale, i.e. descaling, in combination with rolling
Devices for cleaning in general
Handling thin or filamentary material, e.g. sheets, webs, cables
Transport or storage devices, e.g. conveyors for loading
Other working of metal, combined operations
Making forged or pressed products
Soldering, welding
Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
Definition statement
This subclass/group covers:

Methods, devices and drives for metal drawing.

Metal drawing consists in reducing the cross-section of a work piece (e.g. reducing the diameter of a metal rod or wire) by forcing it through a die. Metal drawing differs from extrusion by the lower rate of reduction.

Source:EP1393828

Informative references
Attention is drawn to the following places, which may be of interest for search:
Metal drawing tools, dies and mandrels
Pointing
Cooling, heating or lubricating drawing material
Profiling tools for metal drawing; combinations of dies and mandrels
Definition statement
This subclass/group covers:

All aspects relating to metal drawing tools (dies, die holders, mandrels).

Source: WO2008010614

Informative references
Attention is drawn to the following places, which may be of interest for search:
Metal drawing machines, methods or drives
Pointing
Cooling, heating or lubricating drawing material
Pointing; Push pointing
Definition statement
This subclass/group covers:

Reducing the cross-section of the material's leading end for easing its insertion into the drawing die prior to drawing.

Source: DE3634229

Cooling, heating or lubricating drawing material (B21C 3/14 takes precedence)
Definition statement
This subclass/group covers:

All aspects of cooling, heating or lubricating the drawing material and/or the drawing devices or dies.

Source: DE19817088

Informative references
Attention is drawn to the following places, which may be of interest for search:
Metal drawing machines, methods or drives
Metal drawing tools, dies and mandrels
Lubricants in general
Devices for straightening wire or like work combined with or specially adapted for use in connection with drawing or winding machines or apparatus
Definition statement
This subclass/group covers:

Devices either:

- for straightening wire, wherein the straightening action is realized by using drawing dies, or

- for straightening wire, which devices are used in combination with wire drawing or winding machines (e.g. straightening prior to drawing).

Informative references
Attention is drawn to the following places, which may be of interest for search:
Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made there from.
Working of wire by straightening
Winding, coiling
Extruding metal; Impact extrusion
Definition statement
This subclass/group covers:

Methods and devices for metal extrusion; products obtained by metal extrusion as well as lubrication aspects.

The title refers to impact extrusion. This is however only one specific metal extrusion technique covered by this group.

Metal extrusion consists in forcing solid metal through a suitably shaped orifice using compressive forces. Metal extrusion differs from metal drawing by the higher rate of reduction.

Source: US2007227221

Informative references
Attention is drawn to the following places, which may be of interest for search:
Tools for metal extrusion (i.e. mandrels and dies)
Rams, plungers or disks therefore
Containers for metal to be extruded
Cooling or heating work or parts of the extrusion press
Control or measuring devices in relation with extrusion
Feeding extrusion presses with metal to be extruded
Removing work or waste from extrusion presses; Cleaning
Continuous casting
Extrusion of plastic material
Profiling tools for metal extruding
Definition statement
This subclass/group covers:

Dies and mandrels for metal extrusion, including dies and mandrels for coating work by extrusion or having a section variable during extruding.

The extrusion die and/or mandrel define/s the section through which the billet is forced, thereby defining the cross sectional shape of the extruded product.

Source: WO2007029888

Informative references
Attention is drawn to the following places, which may be of interest for search:
Extrusion devices and methods
Rams, plungers or disks therefore
Containers for metal to be extruded
Cooling or heating work or parts of the extrusion press
Control or measuring devices in relation with extrusion
Feeding extrusion presses with metal to be extruded
Removing work or waste from extrusion presses; Cleaning
Rams or plungers; Disks therefor
Definition statement
This subclass/group covers:

Rams or plungers for metal extrusion; the disks therefore as well as the dummy blocks.

The extrusion ram or plunger is normally the element applying the extrusion pressure to the billet to be extruded.

Source: DE10036463

Informative references
Attention is drawn to the following places, which may be of interest for search:
Extrusion devices and methods
Tools for metal extrusion (i.e. mandrels and dies)
Containers for metal to be extruded
Cooling or heating work or parts of the extrusion press
Control or measuring devices in relation with extrusion
Feeding extrusion presses with metal to be extruded
Removing work or waste from extrusion presses; Cleaning
Containers for metal to be extruded (B21C 29/02 takes precedence)
Definition statement
This subclass/group covers:

The container is the element into which the billet is placed and pressurized for extrusion.

Source: DE3342617

References relevant to classification in this group
This subclass/group does not cover:
Containers comprising cooling or heating elements
Informative references
Attention is drawn to the following places, which may be of interest for search:
Extrusion devices and methods
Tools for metal extrusion (i.e. mandrels and dies)
Rams, plungers or disks therefore
Cooling or heating work or parts of the extrusion press
Control or measuring devices in relation with extrusion
Feeding extrusion presses with metal to be extruded
Removing work or waste from extrusion presses; Cleaning
Cooling or heating work or parts of the extrusion press; [N: Gas treatment of work]
Definition statement
This subclass/group covers:

All aspects relating to heating or cooling in combination with metal extrusion.

Source: GB1058854

Informative references
Attention is drawn to the following places, which may be of interest for search:
Extrusion devices and methods
Tools for metal extrusion (i.e. mandrels and dies)
Rams, plungers or disks therefore
Containers for metal to be extruded
Control or measuring devices in relation with extrusion
Feeding extrusion presses with metal to be extruded
Removing work or waste from extrusion presses; Cleaning
Control devices, e.g. for regulating the pressing speed or temperature of metal (B21C 25/08 takes precedence); Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses (measuring devices of more general interest within subclass B21C, see group B21C 51/00 )
Definition statement
This subclass/group covers:

Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses.

Source: EP2361700

Informative references
Attention is drawn to the following places, which may be of interest for search:
Extrusion devices and methods
Tools for metal extrusion (i.e. mandrels and dies)
Rams, plungers or disks therefore
Containers for metal to be extruded
Cooling or heating work or parts of the extrusion press
Feeding extrusion presses with metal to be extruded
Removing work or waste from extrusion presses; Cleaning
Measuring devices of more general interest
Feeding extrusion presses with metal to be extruded; [N: Loading the dummy block]
Definition statement
This subclass/group covers:

All aspects concerning operations or devices upstream of the extrusion press or extrusion process, and specifically linked to it, including e.g.feeding conveyors and grippers used to provide a workpiece to an extrusion press.

Source: EP0486436

Informative references
Attention is drawn to the following places, which may be of interest for search:
Extrusion devices and methods
Tools for metal extrusion (i.e. mandrels and dies)
Rams, plungers or disks therefore
Containers for metal to be extruded
Cooling or heating work or parts of the extrusion press
Control or measuring devices in relation with extrusion
Removing work or waste from extrusion presses; Cleaning
Removing work or waste from extruding presses; Drawing-off extruded work (in connection with the extruding of bent tubes or rods B21C 23/12 ); Cleaning dies, ducts, containers, or mandrels
Definition statement
This subclass/group covers:

All aspects concerning operations or devices downstream of the extrusion press or extrusion process, and specifically linked to it, including e.g.:

- Removing work or waste from extruding presses;

- Drawing off extruded work;

- Cleaning dies, ducts, containers or mandrels.

- Scrapers and scraping knives for cutting-off or removing the waste or for removing sections from the extruded work, e.g. removing a strip to create an open profile.

Source: EP0787543

Informative references
Attention is drawn to the following places, which may be of interest for search:
Extrusion devices and methods
Tools for metal extrusion (i.e. mandrels and dies)
Rams, plungers or disks therefore
Containers for metal to be extruded
Cooling or heating work or parts of the extrusion press
Control or measuring devices in relation with extrusion
Feeding extrusion presses with metal to be extruded
Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for (by rolling B21B; by working or processing semi-finished sheet metal, profiles, tubes, or wire B21D or B21F; by casting B22; by material-removing machine tools B23; by welding, e.g. cladding or plating B23K; by grinding or polishing B24; by electroforming C25D 1/00 ; by drawing or extruding, see the relevant groups); Manufacture of tubes of special shape
Definition statement
This subclass/group covers:

Processes and devices for the manufacture of:

Metal sheets (covered by B21C 37/02).

Metal wires (covered by B21C 37/04).

Metal tubes (covered by B21C 37/08-B21C 37/14).

Metal tubes of special shape (covered by B21C 37/15-B21C 37/298).

Finishing tubes, e.g. sizing, burnishing (covered by B21C 37/30).

Source: EP1880776

Informative references
Attention is drawn to the following places, which may be of interest for search:
Manufacture of metallic fibers
Metal extrusion devices and methods
Bending of metal sheet along straight lines
Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass
Definition statement
This subclass/group covers:

All aspects relating to cleaning metal products, wherein the cleaning action is realized by using machines of B21C or wherein the cleaning action is used in combination with machines of B21C.

This group includes in particular, cleaning metal products, especially descaling, by metal drawing, or with methods associated to metal drawing or winding processes.

Source: WO2006200502

Separating mandrels from work or vice-versa.
Definition statement
This subclass/group covers:

Separation of mandrels from work or vice-versa.

Source: JP61092708

Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only (coiling wire into particular form B21F 3/00; hot coilers in connection with heat-treatment apparatus C21D 9/68 )
Definition statement
This subclass/group covers:

Methods and devices for coiling (winding) and uncoiling (unwinding) of metal wire, band or similar metal product.

Associated operations, like feeding or guiding the material, transferring coils, joining wire or band ends, treating the material, holding on drums or coil holders.

Source: US5170653

Informative references
Attention is drawn to the following places, which may be of interest for search:
Joining metal sheets
Coiling wire into particular form
Unwinding welding material
Furnace coilers, Hot coilers
Winding electrical elements
Devices for temporarily accumulating material
Definition statement
This subclass/group covers:

Devices for temporarily accumulating metallic material (e.g. metal bands or wires).

Source: DE4243409

Informative references
Attention is drawn to the following places, which may be of interest for search:
Accumulating rolled material
Accumulating material in general
Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B to B21F
Definition statement
This subclass/group covers:

Mainly detecting flaws of metal sheets and positioning or marking said flaws.

However, this group has been conceived very generally, which is reflected in its content.

Source: WO2011145168

Informative references
Attention is drawn to the following places, which may be of interest for search:
Measuring
Embossing, marking
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 manufacture of metal sheets, wire, rods, tubes or profiles otherwise than by rolling

Subject-matter not provided for in other groups of this subclass concerning auxiliary operations used in connection with metal-working without essentially removing material.

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