1. CPC Sections
  2. CPC Section B
  3. CPC Class B07
  4. CPC Subclass B07B
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CPC
COOPERATIVE PATENT CLASSIFICATION
​​
B07B
SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL (wet separating processes, sorting by processes using fluent material in the same way as liquid B03; combinations of dry separating apparatus with wet separating apparatus B03B; using liquids B03B, B03D; sorting by magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high voltage electric fields B03C; centrifuges or vortex apparatus for carrying out physical processes B04; hand sorting, postal sorting, sorting by switching or other devices actuated in response to detection or measurement of some feature of articles or samples of material B07C) [2021-01]
NOTE

  • In this subclass any sorting or grading of bulk material or loose articles fit to be handled like bulk material results automatically from the construction of the apparatus and properties of the material, e.g. by a trap opening under an object of a certain minimum weight, by an aperture of graduated size. Sorting of articles is included in so far as the same conditions apply, e.g. sorting of timber by passing it over successively longer openings; the articles may or may not be orientated for the purpose of sorting.
WARNINGS

  • The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups:
    B07B1/32 covered by B07B 1/30
  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
B07B 1/00
Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like {(ash-sifters for domestic stoves or ranges F24B 15/007)} [2013-01]
B07B 1/005
.
{Transportable screening plants} [2013-01]
B07B 1/02
.
Hand screens [2013-01]
B07B 1/04
.
Stationary flat screens [2013-01]
B07B 1/06
.
Cone or disc shaped screens [2013-01]
B07B 1/08
.
Screens rotating within their own plane [2017-08]
B07B 1/10
.
Screens in the form of endless moving bands [2013-01]
B07B 1/12
.
Apparatus having only parallel elements [2013-01]
B07B 1/14
. .
Roller screens [2013-01]
B07B 1/145
. . .
{the material to be screened moving along the axis of the parallel elements} [2013-01]
B07B 1/15
. . .
using corrugated, grooved or ribbed rollers [2013-01]
B07B 1/155
. . . .
{the rollers having a star shaped cross section} [2013-01]
B07B 1/16
. .
the elements being movable and in other than roller form [2013-01]
B07B 1/18
.
Drum screens [2013-01]
B07B 1/185
. .
{provided with exchangeable sieve panels} [2013-01]
B07B 1/20
. .
Stationary drums with moving interior agitators [2013-01]
B07B 1/22
. .
Revolving drums [2013-01]
B07B 1/24
. . .
with fixed or moving interior agitators [2013-01]
B07B 1/26
. . .
with additional axial or radial movement of the drum [2013-01]
​
B07B 1/28
.
Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens [2021-01]
NOTE

B07B 1/282
. .
{their jigging movement being a closed or open curvilinear path in a plane perpendicular to the plane of the screen and parrallel or transverse to the direction of conveyance} [2013-01]
B07B 1/284
. .
{with unbalanced weights} [2013-01]
B07B 1/286
. .
{with excentric shafts} [2021-01]
B07B 1/288
. .
{Tumbling screens} [2013-01]
B07B 1/30
. .
jigging or moving to-and-fro {within their own plane} in or approximately in {or transverse to} the direction of conveyance [2013-01]
B07B 1/34
. .
jigging or moving to-and-fro perpendicularly or approximately perpendiculary to the plane of the screen [2013-01]
B07B 1/343
. . .
{with mechanical drive elements other than electromagnets} [2013-01]
B07B 1/346
. . .
{with electromagnets} [2013-01]
B07B 1/36
. .
jigging or moving to-and-fro in more than one direction [2013-01]
B07B 1/38
. .
oscillating in a circular arc in their own plane; Plansifters [2017-08]
B07B 1/40
. .
Resonant vibration screens [2013-01]
B07B 1/42
.
Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens [2013-01]
B07B 1/44
. .
Balancing devices [2013-01]
B07B 1/46
.
Constructional details of screens in general; Cleaning or heating of screens [2013-01]
B07B 1/4609
. .
{constructional details of screening surfaces or meshes} [2013-01]
B07B 1/4618
. . .
{Manufacturing of screening surfaces} [2013-01]
B07B 1/4627
. . .
{Repairing of screening surfaces} [2013-01]
B07B 1/4636
. . .
{Regulation of screen apertures} [2013-01]
B07B 1/4645
. . .
{Screening surfaces built up of modular elements} [2013-01]
B07B 1/4654
. . .
{Corrugated Screening surfaces} [2013-01]
B07B 1/4663
. . .
{Multi-layer screening surfaces} [2013-01]
B07B 1/4672
. . .
{Woven meshes} [2018-05]
B07B 1/4681
. . .
{Meshes of intersecting, non-woven, elements} [2013-01]
B07B 1/469
. . .
{Perforated sheet-like material} [2013-01]
B07B 1/48
. .
Stretching devices for screens [2013-01]
B07B 1/485
. . .
{Devices for alternately stretching and sagging screening surfaces} [2013-01]
B07B 1/49
. . .
stretching more than one screen or screen section by the same or different stretching means [2017-08]
B07B 1/50
. .
Cleaning [2013-01]
B07B 1/52
. . .
with brushes or scrapers [2013-01]
B07B 1/522
. . . .
{with brushes} [2013-01]
B07B 1/524
. . . . .
{the brushes being rotating} [2013-01]
B07B 1/526
. . . .
{with scrapers} [2013-01]
B07B 1/528
. . . . .
{the scrapers being rotating} [2013-01]
B07B 1/54
. . .
with beating devices [2013-01]
B07B 1/55
. . .
with fluid jets [2013-01]
B07B 1/56
. .
Heated screens [2013-01]
B07B 1/58
. . .
heated by heated fluid [2013-01]
B07B 1/60
. . .
heated by flame heating [2013-01]
B07B 1/62
. . .
heated by direct electric heating [2013-01]
Separating solids from solids using gas currents [2013-01]
B07B 4/00
Separating solids from solids by subjecting their mixture to gas currents (using tables or jigs B03B 4/00) [2013-01]
B07B 4/02
.
while the mixtures fall [2013-01]
B07B 4/025
. .
{the material being slingered or fled out horizontally before falling, e.g. by dispersing elements} [2013-01]
B07B 4/04
. .
in cascades [2013-01]
B07B 4/06
. .
using revolving drums [2013-01]
B07B 4/08
.
while the mixtures are supported by sieves, screens, or like mechanical elements [2013-01]
B07B 7/00
Selective separation of solid materials carried by, or dispersed in, gas currents (sieves or filters for separating dispersed particles from gases or vapours B01D) [2017-08]
B07B 7/01
.
using gravity [2013-01]
B07B 7/02
.
by reversal of direction of flow [2013-01]
B07B 7/04
.
by impingement against baffle separators [2013-01]
B07B 7/06
.
by impingement against sieves [2013-01]
B07B 7/08
.
using centrifugal force (centrifuges B04B; cyclones B04C) [2013-01]
B07B 7/083
. .
generated by rotating vanes, discs, drums, or brushes [2013-01]
B07B 7/086
. .
generated by the winding course of the gas stream [2013-01]
B07B 7/0865
. . .
{using the coanda effect of the moving gas stream} [2013-01]
B07B 7/10
. .
having air recirculating within the apparatus [2013-01]
B07B 7/12
.
with pulsating air currents [2013-01]
B07B 9/00
Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets [2013-01]
B07B 9/02
.
Combinations of similar or different apparatus for separating solids from solids using gas currents [2013-01]
B07B 11/00
Arrangement of accessories in apparatus for separating solids from solids using gas currents [2013-01]
B07B 11/02
.
Arrangement of air or material conditioning accessories [2013-01]
B07B 11/04
.
Control arrangements [2013-01]
B07B 11/06
.
Feeding or discharging arrangements [2013-01]
B07B 11/08
.
Cleaning arrangements [2013-01]
Other separating, e.g. grading, resulting automatically from the construction of the apparatus used and properties of the material concerned; Combinations [2013-01]
B07B 13/00
Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices (grading eggs A01K 43/04) [2013-01]
B07B 13/003
.
{Separation of articles by differences in their geometrical form or by difference in their physical properties, e.g. elasticity, compressibility, hardness} [2013-01]
B07B 13/006
.
{Sorting molded pieces and runners} [2013-01]
B07B 13/02
.
Apparatus for grading using pockets for taking out particles from aggregates [2013-01]
B07B 13/04
.
according to size [2013-01]
B07B 13/05
. .
using material mover cooperating with retainer, deflector or discharger (B07B 13/065 - B07B 13/075 take precedence) [2016-05]
B07B 13/065
. .
Apparatus for grading or sorting using divergent conveyor belts or cables [2016-05]
B07B 13/07
. .
Apparatus in which aggregates or articles are moved along or past openings which increase in size in the direction of movement [2013-01]
B07B 13/072
. . .
{the openings being rollers with a divergent axis and the material moving substantially along the rollers axis} [2013-01]
B07B 13/075
. .
Apparatus comprising moving article - receiving openings, the size of which varies as they move [2013-01]
B07B 13/08
.
according to weight (B07B 13/10 takes precedence) [2013-01]
B07B 13/10
.
using momentum effects [2013-01]
B07B 13/11
. .
involving travel of particles over surfaces which separate by centrifugal force or by relative friction between particles and such surfaces, e.g. helical sorters [2013-01]
B07B 13/113
. . .
{shaking tables (for wet separating B03B 5/04; tables with water impulse B03B 5/70; pneumatic tables B03B 4/02; moving screens B07B 1/28)} [2013-01]
B07B 13/116
. . .
{stratification of dry granular material on a continuously travelling surface, e.g. belt conveyor (vanner for wet separation B03B 5/08)} [2016-05]
B07B 13/14
.
Details or accessories [2013-01]
B07B 13/16
. .
Feed or discharge arrangements [2013-01]
B07B 13/18
. .
Control [2013-01]
B07B 15/00
Combinations of apparatus for separating solids from solids by dry methods applicable to bulk material, e.g. loose articles fit to be handled like bulk material (using wet methods B03B 7/00; using gas currents B07B 9/00) [2013-01]
B07B 2201/00
Details applicable to machines for screening using sieves or gratings [2013-01]
B07B 2201/02
.
Fastening means for fastening screens to their frames which do not stretch or sag the screening surfaces [2013-01]
B07B 2201/04
.
Multiple deck screening devices comprising one or more superimposed screens [2013-01]
B07B 2220/00
Type of materials being separated [2013-01]
B07B 2220/02
.
Plastics [2013-01]
B07B 2220/04
.
Batteries [2013-01]
B07B 2230/00
Specific aspects relating to the whole B07B subclass [2013-01]
B07B 2230/01
.
Wet separation [2013-01]
B07B 2230/04
.
The screen or the screened materials being subjected to ultrasonic vibration [2013-01]