B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
 B01 - 
B07
Subsection index
LIQUID/LIQUID, LIQUID/GAS OR GAS/GAS SEPARATION
Method
General operationsB01D
by centrifugal force, using centrifuges or free-vortex apparatusB01D
using magnetic or electrostatic effectB03C
Apparatus
General operationsB01D
by centrifugal force, using centrifuges or free-vortex apparatusB04B, B04C
using magnetic or electrostatic effectB03C
SOLID/LIQUID OR SOLID/GAS SEPARATION
Method
General operationsB01D
by centrifugal forceB01D
using centrifuges or free-vortex apparatusB01D
using magnetic or electrostatic effectB03C
Apparatus
General operationsB01D
by centrifugal forceB01D
using centrifuges or free-vortex apparatusB04B, B04C
using magnetic or electrostatic effectB03C
SOLID/SOLID SEPARATION
Method
Dry methods
material in bulkB07B
Individual sortingB07C
Screening, sifting, pneumatic sortingB07B
using pneumatic tables or jigsB03B
by magnetic or electrostatic effectB03C
by centrifugal forceB07B
using centrifuges or free-vortex apparatusB07B
Wet methods
General operationsB03B
flotation, differential sedimentationB03D
screeningB07B
Combinations Dry methods - wet methodsB03B
Apparatus
Dry methods
material in bulkB07B
Individual sortingB07C
Screening, sifting, pneumatic sortingB07B
using pneumatic tables or jigsB03B
by magnetic or electrostatic effectB03C
by centrifugal forceB07B
using centrifuges or free-vortex apparatusB04B, B04C
Wet methods
General operationsB03B
flotation, differential sedimentationB03D
screeningB07B
Combinations Dry methods - wet methodsB03B
  
SHAPING
 B21
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)
 B21

Note(s)

  1. This class does not cover:
  2. Processes of a kind covered by this class but applied to non-metallic materials are classified in this class if they are applicable to metal and cannot be classified fully in another class.
 B21B
ROLLING OF METAL (auxiliary operations used in connection with metal-working operations covered in B21, see B21C; bending by rolling B21D; manufacture of particular objects, e.g. screws, wheels, rings, barrels, balls, by rolling B21H; pressure welding by means of a rolling mill B23K 20/04)
 B21B

Note(s)

In this subclass, the following terms or expressions are used with the meanings indicated:

  • "rolling" means rolling operations in which plastic deformations occur;
  • "continuous process" means a process employing a mill train designed to have the workpiece enter one pair of rolls before leaving the preceding pair.  [2]

 B21B
Subclass index
METAL ROLLING IN GENERAL
General methods or apparatus 1/00, 11/00, 13/00, 15/00
Control or handling 35/00, 37/00, 38/00, 39/00, 41/00
Safety, cooling, maintenance 28/00, 33/00, 43/00
Details of rolling mills 27/00, 29/00, 31/00
METAL ROLLING UNDER SPECIAL CONDITIONS 9/00
AUXILIARY OPERATIONS PERFORMED IN CONNECTION WITH METAL ROLLING 15/00, 45/00, 47/00
ROLLING SPECIAL ALLOYS 3/00
ROLLING TO PRODUCE PARTICULAR SHAPES
Tubes
rolling methods 17/00 - 23/00
mandrels, accessories 25/00
Extending closed shapes 5/00
SUBJECT MATTER NOT PROVIDED FOR IN OTHER GROUPS OF THIS SUBCLASS 99/00
P:140 B21B 1/00
Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section (B21B 17/00-B21B 23/00 take precedence; with respect to composition of material to be rolled B21B 3/00; extending closed shapes of metal bands by simultaneous rolling at two or more zones B21B 5/00; metal-rolling stands as units B21B 13/00; continuous casting into moulds having walls formed by moving rolls B22D 11/06); Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
 B21B 1/08
·  for rolling work of special cross-section, e.g. angle steel (rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects B21H 8/00)  [1,8]
 B21B 1/16
·  for rolling wire or material of like small cross-section
 B21B 1/22
·  for rolling bands or sheets of indefinite length (B21B 1/42 takes precedence)
 B21B 1/24
·  ·  in a continuous process
 B21B 1/26
·  ·  ·  by hot-rolling
 B21B 1/30
·  ·  in a non-continuous process
 B21B 1/42
·  for step-by-step or planetary rolling (making tubes by pilgrim-step rolling B21B 21/00)
 B21B 1/46
·  for rolling metal immediately subsequent to continuous casting (metal-rolling stands B21B 13/00; continuous casting B22D 11/00, e.g. into moulds with rolls B22D 11/06)  [3]
P:20 B21B 3/00
Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences (altering special metallurgical properties of alloys, other than structure consolidation or mechanical properties resulting therefrom C21D, C22F)
 B21B 3/02
·  Rolling special iron alloys
P:120 B21B 5/00
Extending closed shapes of metal bands by rolling (manufacture of circular shapes, e.g. wheel rims, B21H 1/00)
P:10 B21B 9/00
Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills
P:130 B21B 11/00
Subsidising the rolling processes by subjecting rollers or work to vibrations
P:210 B21B 13/00
Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories (B21B 17/00-B21B 23/00 take precedence; details, component parts, accessories, auxiliary means, procedures in connection with metal rolling, see the relevant groups)
 B21B 13/14
·  having counter-pressure devices acting on rolls to inhibit deflection of same under load (counter-pressure devices as such B21B 29/00)
P:50 B21B 15/00
Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
 B21B 15/02
·  in which work is subjected to permanent internal twisting, e.g. for producing reinforcement bars for concrete
 B21B 17/00 - 
B21B 25/00
Rolling methods or mills specially designed for making or processing tubes (control of tube rolling B21B 37/78)
P:100 B21B 17/00
Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
P:90 B21B 19/00
Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work (straightening by rollers B21D)
P:80 B21B 21/00
Pilgrim-step tube-rolling
P:70 B21B 23/00
Tube-rolling not restricted to methods provided for in only one of groups B21B 17/00-B21B 21/00, e.g. combined processes (B21B 25/00 takes precedence)
P:60 B21B 25/00
Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B 17/00; Accessories or auxiliary means therefor
   
P:230 B21B 27/00
Rolls (shape of working surfaces required by special processes B21B 1/00); Lubricating, cooling or heating rolls while in use
 B21B 27/02
·  Shape or construction of rolls (for rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects B21H 8/00)
 B21B 27/03
·  ·  Sleeved rolls  [5]
 B21B 27/06
·  Lubricating, cooling, or heating rolls
P:190 B21B 28/00
Maintaining rolls or rolling equipment in effective condition (lubricating, cooling or heating rolls while in use B21B 27/06)  [2]
P:240 B21B 29/00
Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls
P:220 B21B 31/00
Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
 B21B 31/16
·  Adjusting rolls (control devices B21B 37/00)
P:0 B21B 33/00
Safety devices not otherwise provided for (safety devices in general F16P); Breaker blocks; Devices for freeing jammed rolls  [2]
P:200 B21B 35/00
Drives for metal-rolling mills
P:30 B21B 37/00
Control devices or methods specially adapted for metal-rolling mills or the work produced thereby (methods or devices for measuring specially adapted for metal-rolling mills B21B 38/00)
 B21B 37/16
·  Control of thickness, width, diameter or other transverse dimensions (B21B 37/58 takes precedence)  [6]
 B21B 37/28
·  Control of flatness or profile during rolling of strip, sheets or plates  [6]
 B21B 37/46
·  Roll speed or drive motor control (B21B 37/48, B21B 37/58 take precedence)  [6]
 B21B 37/48
·  Tension control; Compression control  [6]
 B21B 37/56
·  Elongation control  [6]
 B21B 37/58
·  Roll-force control; Roll-gap control  [6]
 B21B 37/68
·  Camber or steering control for strip, sheets or plates, e.g. preventing meandering  [6]
 B21B 37/70
·  Length control (B21B 37/56 takes precedence)  [6]
 B21B 37/72
·  Rear end control; Front end control  [6]
 B21B 37/74
·  Temperature control, e.g. by cooling or heating the rolls or the product (B21B 37/28 takes precedence)  [6]
 B21B 37/78
·  Control of tube rolling  [6]
P:40 B21B 38/00
Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product  [6]
P:160 B21B 39/00
Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills (guiding, conveying, or accumulating easily-flexible work in loops or curves B21B 41/00; specially associated with cooling-beds B21B 43/00; conveying or transporting in general B65G)
 B21B 39/02
·  Feeding or supporting work; Braking or tensioning arrangements
 B21B 39/14
·  Guiding, positioning or aligning work (B21B 43/00 takes precedence; guides in which work is subjected to permanent internal twisting B21B 15/02)
 B21B 39/20
·  Revolving, turning-over, or like manipulation of work (guides in which work is subjected to permanent internal twisting B21B 15/02)
 B21B 39/34
·  Arrangements or constructional combinations specifically designed to perform functions covered by more than one of groups B21B 39/02, B21B 39/14, B21B 39/20
P:150 B21B 41/00
Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters
P:180 B21B 43/00
Cooling beds, whether stationary or moving; Means specially associated with cooling beds, e.g. for braking work or for transferring it to or from the bed (conveying means in general B65G)
P:110 B21B 45/00
Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills (B21B 15/00 takes precedence; technical features of scaling-off devices B21C 43/00)
 B21B 45/02
·  for lubricating, cooling, or cleaning
 B21B 45/04
·  for de-scaling
P:170 B21B 47/00
Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal (soaking pits C21D 9/70)  [2]
P:250 B21B 99/00
Subject matter not provided for in other groups of this subclass  [8]