CPC Definition - Subclass F26B

Last Updated Version: 2020.08
DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM (racks for drying fruit and vegetables A01F 25/12; drying foodstuffs A23; drying hair A45D 20/00; body-drying implements A47K 10/00; drying household articles A47L, {e.g. drying footwear A47L 23/20; } drying gases and vapours B01D; chemical and physical processes for dewatering or like separating liquids from solids B01D 43/00; centrifugal apparatus B04; drying ceramics C04B 33/30; drying yarns and fabrics in association with some other form of treatment D06C; drying frames for laundry without heating or positive air circulation, domestic and like spin-dryers, wringing and hot pressing laundry D06F; furnaces, kilns, ovens F27; {treatment including a drying step of semiconductor substrates, e.g. wafers, H01L 21/67028})
Definition statement

This place covers:

Processes and specific machines and arrangements for drying objects, solid materials or fluent materials containing solids by removing water or other liquids therefrom.

Relationships with other classification places

Processing, e.g. drying of harvested produce

A01F

Dairy products

A01J

Food and foodstuffs; their treatment, e.g. drying

A23

Drying household articles

A47L

Drying gases and vapours

B01D

Physical Processes and their relevant apparatus

B01J

Centrifuges

B04B

Preparation or pre-treatment, e.g. drying, of plastics to be shaped

B29B

Presses in general

B30B

Cement Making

C04B

Drying of peat

C10F

Fuels, e.g. solid fuels not otherwise provided for

C10L

Drying yarns or fabrics in association with some other form of treatment

D06C

Drying textile articles

D06F

Production of cellulose, e.g. pulp

D21C

Impregnating or coating of paper

D21H

Regulating or controlling combustion

F23N

Feeding fuel to combustion apparatus

F23K and F23K

Drying, conditioning of air in general

F24F

Heat cycles, refrigeration

F25B

Furnaces, kilns, ovens in general

F27B

Details of furnaces, kilns and ovens in general

F27C

Cables, conductors and insulators

H01B

Capacitors

H01G

Feeding waste products to combustion apparatus

F23G

References
Limiting references

This place does not cover:

Drying gases and vapours

B01D

Evaporating of liquids

B01D 1/00

Treatment including a drying step of semiconductor substrates, e.g. wafers

H01L 21/67028

Informative references

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

Apparatus for preserving meat, fish, eggs, fruit, vegetables by drying

A23B/03

Apparatus for preserving meat, fish, eggs, fruit, vegetables by freeze drying

A23B/037

Preservation of foodstuff by drying

A23L 3/40

Machines for drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts

A23N 12/08

Drying and activating adhesives in the process of glueing shoe parts

A43D 25/20

Drying of shoes during manufacture

A43D 95/10

Drying Hair

A45D 20/00

Drying razor blades

A45D 27/48

Body Drying Implements

A47K 10/00

Drying footwear

A47L 23/20

Physical or chemical process or apparatus in general for separating liquids from solids

B01D 43/00

Drying of gases, i.e. removing vapour, e.g. water vapour

B01D 53/00

Treating solid materials in general with rotating drums

B01J 19/28

Drying grain before milling

B02B 1/08

Pre- or after-treatment, e.g. drying or curing, of surfaces to which liquids, e.g. coatings or paints, are applied

B05D 3/00

Auxiliary treatment of plastic granules, i.e. after making them

B29B 9/16

Drying plastic pellets, e.g. before the extruder

B29B 13/065

Apparatus for making layered products for laminating, e.g. by curing or drying

B32B 37/00

Drying vehicle bodies, e.g. cars, after washing

B60S 3/002

Drying of matches

C01F1/06

Drying of sludge

C02F 11/12

Drying clay wares

C04B 33/30

Drying or dewatering of peat

C10F 5/02

Drying apparatus for fuels

C10L

Torrefying apparatus for fuels

C10L

Heating solid fuel briquettes of mineral origin

C10L 5/28

Solid biofuels

C10L 5/44

Drying leather or hides as part of the manufacturing process

C14B 1/58

Drying of retted fibres

D01B 1/48

Forcing gases through textile materials

D06B 5/00

Removing liquids from textile materials in association with previous liquid treatment

D06B 15/00

Supporting means for linen or garments to be dried

D06F 57/00

Domestic laundry dryer, e.g. tumbler

D06F 58/00

De-watering of pulp

D21C 9/18

Machines for preparing, e.g. heating and drying, of paving materials for roads

E01C 19/05

Apparatus for drying pavement

E01C 23/14

Drying of constructions, e.g. buildings, and keeping them dry

E04B 1/70

Drying of waste products by heat prior to combustion

F23G 2201/10

Dewatering of waste products by mechanical means prior to combustion

F23G 2201/20

Preparation of solid fuel prior to combustion, e.g. drying

F23K 1/00

Drying of solid fuel prior combustion

F23K 2201/20

Equipment for the use of solar heat

F24S

Drying of photographic film in processing apparatus

G03D15/12

Drying step in manufacturing of electric cables

H01B 13/30

Drying step in manufacturing of electric insulators

H01B 19/02

Drying of, e.g. oil cooled, transformers

H01F

Drying, filling, purifying of, e.g. oil cooled, transformers

H01F 27/14

Drying step in manufacturing capacitors

H01G 13/04

Production of biofuels through pyrolysis

Y02E 50/10

Special rules of classification

Documents dealing with drying specific solid materials or objects belonging to other subclasses are classified in F26B only, if the disclosed drying process or machine is of general interest, i.e. not limited to the specific solid material or object.

Preliminary treatment of solid materials or objects to facilitate drying {, e.g. mixing or backmixing the materials to be dried with predominantly dry solids (F26B 5/005 takes precedence)}
Definition statement

This place covers:

Preliminary treatment, i.e. not the actual drying treatment, of solid materials or objects.

References
Limiting references

This place does not cover:

Applying a combustible liquid, which is burnt off later, onto the solid materials or objects

F26B 3/005

Dipping the solid materials or objects into, or mixing with, chemical liquids for subsequent drying

F26B 5/005

Informative references

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

Replacing liquid in wet solids by other liquid

B01D 12/00

Drying solid materials or objects by processes involving the application of heat (in specific machines or apparatus F26B 9/00 - F26B 19/00)
Definition statement

This place covers:

Drying solid materials or objects by processes applying heat as primary drying principle.

References
Limiting references

This place does not cover:

Processes involving direct heating, e.g. radiation, or indirect heating, e.g. convection, of the drying good merely as a measure to compensate cooling effects through evaporation, e.g. in a vacuum dryer

F26B 5/00

Heat generated by friction through ultrasonic vibrations

F26B 5/02

Condensing vapour other than steam onto the surface of the materials or objects to be dried

F26B 21/145

Informative references

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

Preserving food in general by spray drying

A23L 3/46

Spray drying liquids

B01D 1/16

Spray drying liquid solutions to obtain solids

B01D 1/18

Fluidised bed technique in general

B01J 8/24

UV-curing of paint

B01J 8/24

Equipment for the use of solar heat

F24S

Magnetrons for drying

H05B 6/78

Special rules of classification

Specific machines or apparatus (F26B 9/00 - F26B 19/00) being inherent to the process take precedence.

Therefore, inventions are additionally classified in F26B 3/00 only, if the invention information lies within the process as such.

In any case, inventions are classified in F26B 3/00, if adequate entries, i.e. classes, for machines or apparatuses do not exist.

so as to loosen them, e.g. to form a fluidised bed {("fluidised-bed" technique in general B01J 8/24; centrifugal fluidised beds F26B 7/007)}
References
Limiting references

This place does not cover:

Centrifugal fluidised beds

F26B 7/007

Informative references

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

Fluidised bed technique in general

B01J 8/24

in the form of a spray {, i.e. sprayed or dispersed emulsions or suspensions (spray drying of solutions B01D 1/18)}
References
Informative references

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

Freeze drying involving spraying

F26B 5/065

Preserving food in general by spray drying

A23L 3/46

Spray drying liquids

B01D 1/16

Spray drying liquids or solutions to obtain solids

B01D 1/18

by radiation, e.g. from the sun
References
Informative references

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

Heated fluid, other than combustion gases, in tubes or passages acting as radiative element

F26B 23/10

UV-curing of paint

B05D 3/065

Equipment for the use of solar heat

F24S

Electromagnetic heating, e.g. induction heating or heating using microwave energy
References
Informative references

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

Magnetrons for drying

H05B 6/78

Drying solid materials or objects by processes not involving the application of heat (separating liquids from solids by straining B01D; replacing liquids in wet solids by other liquids, e.g. water by spirit, B01D 12/00; drying by electrophoresis B01J)
Definition statement

This place covers:

Drying solid materials or objects by processes applying a primary drying principle not involving heat.

Direct heating, e.g. radiation, or indirect heating, e.g. convection, of the drying good as measure to compensate cooling effects through evaporation are not considered to be a primary drying principle.

Relationships with other classification places

Separating a liquid product from solids by straining: B01D

Drying by electrophoresis: B01J

Centrifuges in general; details of construction:B04B

References
Informative references

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

Apparatus for preserving meat, fish, eggs, fruit, vegetables by freeze drying

A23B/037

Preserving food in general by freeze drying

A23L 3/44

Domestic salad spin dryer

A47J 43/24

Replacing liquid in wet solids by other liquid

B01D 12/00

Physical or chemical process or apparatus for separating liquids from solids, in general

B01D 43/00

Centrifuges, details of construction

B04B

Metal rolling; removing liquids

B21B 45/0278

Presses for squeezing out liquids

B30B 9/02

Cleaning, e.g. drying paint applying hand tools

B44D 3/006

Drying of peat using presses, rolls or centrifuges

C10F 5/04

Wringing machines for textile articles with two or more cooperating rollers

D06F 45/00

Apparatus of the press type for expelling water from textile articles

D06F 47/00

Domestic spin dryers for textile articles

D06F 49/00

Wet end, e.g. filter belt type, of machines for making a continuous web of paper

D21F 1/00

Drying of constructions or buildings using electricity, e.g. electro-osmosis

E04B 1/7007

Dewatering of waste products by mechanical means prior to combustion

F23G 2201/20

{by dipping them into or mixing them with a chemical liquid, e.g. organic; chemical, e.g. organic, dewatering aids (F26B 3/005 takes precedence; using chemical vapours or gases F26B 21/14)}
Definition statement

This place covers:

by dipping them into or mixing them with a chemical liquid, e.g. organic; chemical, e.g. organic, dewatering aids

References
Limiting references

This place does not cover:

Applying a combustible liquid onto the material, the liquid being burnt off subsequently

F26B 3/005

Condensing vapour other than steam onto the surface of the material to be dried

F26B 21/145

Informative references

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

Replacing liquid in wet solids by other liquid

B01D 12/00

the process involving freezing
References
Informative references

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

Apparatus for preserving meat, fish, eggs, fruit, vegetables by freeze drying

A23B/037

Preserving food in general by freeze drying

A23L 3/44

by centrifugal treatment
References
Informative references

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

Domestic salad spin dryer

A47J 43/24

Centrifuges

B04B

Cleaning, e.g. drying paint applying hand tools

B44D 3/006

Drying of peat using centrifuges

C10F 5/04

Domestic spin dryers for textile articles

D06F 49/00

by suction
References
Limiting references

This place does not cover:

Machines for drying material of long length with progressive movement by applying suction

F26B 13/30 or F26B 13/16

Informative references

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

Metal rolling; removing liquids

B21B 45/0278

Wet end, e.g. filter belt type, of machines for making a continuous web of paper

D21F 1/00

by applying pressure, e.g. wringing; by brushing; by wiping
References
Limiting references

This place does not cover:

Machines for drying material of long length with progressive movement by applying pressure, brushing or wiping

F26B 13/28

Informative references

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

Metal rolling; removing liquids

B21B 45/0278

Presses for squeezing out liquids

B30B 9/02

Drying of peat using presses or rolls

C10F 5/04

Wringing machines for textile articles with two or more cooperating rollers

D06F 45/00

Apparatus of the press type for expelling water from textile articles

D06F 47/00

Wet end, e.g. filter belt type, of machines for making a continuous web of paper

D21F 1/00

by contact with sorbent bodies, e.g. absorbent mould; by admixture with sorbent materials
References
Limiting references

This place does not cover:

Machines for drying material of long length with progressive movement by employing sorbent surfaces

F26B 13/26

Drying solid materials or objects by processes using a combination of processes not covered by a single one of groups F26B 3/00 and F26B 5/00 {(F26B 1/005, F26B 5/04, F26B 23/026 take precedence)}
Definition statement

This place covers:

Drying solid materials or objects by processes using a synergy creating combination, opposed to a simple agglomeration, of a heat applying "hot" process and a "cold" process.

Special rules of classification

Documents classified in the combination group F26B 7/00 are also to be classified in the relevant "hot" group F26B 3/00, F26B 9/00 - F26B 19/00 respectively, and the relevant "cold" group F26B 5/00.

Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards {(domestic laundry drying cabinets or chambers having heating or ventilating means D06F 58/10)}
Definition statement

This place covers:

Machines or apparatus for drying "large" objects at rest.

Machines or apparatus for drying solid materials or "small" objects, e.g. bulk materials at rest or with local agitation, e.g. fixed or moving "small" stirrer in a "large" silo.

References
Informative references

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

Ventilating means for stacks of agricultural products

A01F 25/08

Machines for drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts

A23N 12/08

Drying Hair

A45D 20/00

Drying razor blades

A45D 27/48

Body Drying Implements

A47K 10/00

Large containers having means for heating, cooling, aerating or other conditioning of contents

B65D 88/74

Supporting means for linen or garments to be dried

D06F 57/00

Domestic laundry drying cabinets

D06F 58/10

Drying or keeping dry of constructions, e.g. buildings

E04B 1/70

{Small self-contained devices, e.g. portable}
References
Informative references

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

Drying razor blades

A45D 27/48

{Removable covering devices, e.g. pliable or flexible}
References
Informative references

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

Roofs of drying chambers

F26B 25/10

in the open air; in pans or tables in rooms; Drying stacks of loose material {on floors which may be covered, e.g. by a roof (ventilating means of stacks for agricultural produce A01F 25/08)}
References
Informative references

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

Ventilating means for stacks of agricultural products

A01F 25/08

Machines or apparatus for drying solid materials or objects with movement which is non-progressive
Definition statement

This place covers:

Machines or apparatus for drying solid materials or objects with primarily non-progressive, i.e. stirring, movement.

The movement of solid materials in e.g. horizontal rotating drums such as kilns is considered not primarily progressive even though opposed inlets and outlets are typically present.

References
Informative references

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

Treating in general with rotating drums

B01J 19/28

Machines for preparing, e.g. heating and drying, of paving materials for roads

E01C 19/05

in moving drums or other mainly-closed receptacles (F26B 11/18 takes precedence)
References
Informative references

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

Treating in general with rotating drums

B01J 19/28

Machines for preparing, e.g. heating and drying, of paving materials for roads

E01C 19/05

{Arrangements of drives, bearings, supports}
References
Informative references

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

Driving arrangements specific to drying machines in general

F25B 25/02

{Arrangements for gas-sealing the drum}
References
Informative references

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

Seals, locks for drying machines in general

F26B 25/008

{Arrangements for charging or discharging the materials to be dried, e.g. discharging by reversing drum rotation, using spiral-type inserts}
References
Informative references

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

Charging and discharging of bulk materials to drying machines in general

F26B 25/002

{Arrangements for the supply or exhaust of gaseous drying medium for direct heat transfer, e.g. perforated tubes, annular passages, burner arrangements, dust separation, combined direct and indirect heating}
Definition statement

This place covers:

Arrangement for the supply or exhaust of gaseous drying medium for direct heat transfer, e.g. perforated tubes, annular passages, burner arrangements, dust separation, combined direct and indirect heat transfer

References
Informative references

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

Arrangements for supplying drying gas in general

F26B 21/00

rotating about a horizontal or slightly-inclined axis {(F26B 11/022, F26B 11/024, F26B 11/026, F26B 11/028 take precedence)}
References
Informative references

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

Machines for preparing, e.g. heating and drying, of paving materials for roads

E01C 19/05

Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
Definition statement

This place covers:

Machines and apparatus for drying materials in long length. The materials move progressively through the apparatus either in the form of a coil or uncoiled, e.g. in the form of a web.

References
Limiting references

This place does not cover:

Drying yarn hanks

F26B 15/124

Informative references

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

Drying fishing lines

A01K 97/16

Apparatus for making layered products for laminating, e.g. by curing or drying

B32B 37/00

Treating, e.g. drying, webs after printing

B41F 23/00

Drying filamentary material, e.g. sheets, webs or cables during package formation

B65H 71/00

Drying yarns during spinning or twisting

D01H 13/30

Forcing gases through textile materials

D06B 5/00

Removing liquids from textile materials in association with previous liquid treatment

D06B 15/00

Wet end, e.g. filter belt type, of machines for making a continuous web of paper

D21F 1/00

Dryer sections of machines for making a continuous web of paper

D21F 5/00

Paper-impregnating material characterized by its constitution

D21H 17/00

Paper-impregnating material characterized by its function, form or properties

D21H 21/00

Drying step in manufacturing of cables

H01B 13/30

Drying step in manufacturing of insulators

H01B 19/02

{Seals, locks, e.g. gas barriers for web drying enclosures}
References
Informative references

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

Seal, looks in drying apparatus in general

F26B 25/008

Arrangements of devices using drying processes not involving heating (such processes per se F26B 5/00)
References
Informative references

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

Metal rolling; removing liquids

B21B 45/0278

using sorbent surfaces, e.g. bands or coverings on rollers
References
Informative references

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

Drying process by contact with sorbent bodies

F26B 5/16

for applying pressure; for brushing; for wiping
References
Informative references

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

Drying process applying pressure, brushing, wiping

F26B 5/14

Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form (F26B 13/00, F26B 17/00 take precedence; conveyors in general B65G)
Definition statement

This place covers:

Machines or apparatus for drying objects or object-like batches, e.g. material in a container.

The objects or batches move progressively through the machine or apparatus.

Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement (F26B 13/00 takes precedence {; feed or discharge arrangements F26B 25/002})
Definition statement

This place covers:

Machines or apparatus for drying materials in loose form, plastic or fluidized form.

The materials move progressively through the machine or apparatus.

References
Limiting references

This place does not cover:

Machines with primarily non-progressive movement of materials, e.g. mixing of materials

F26B 11/00

Fibres forming a material of long length, e.g. yarn, web

F26B 13/00

Informative references

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

Machines for drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts

A23N 12/08

Drying tobacco

A24B 3/04

Drying grain before milling

B02B 1/08

Treatment, e.g. drying of wood particles in the production of pressed articles, e.g. boards

B27N 1/00

Special rules of classification

The movement of materials through rotating drums, e.g. kiln, is considered non-progressive; rotating drums are therefore classified in F26B 11/00

with movement performed by belts carrying the materials; with movement performed by belts {or elements attached to endless belts or chains} propelling the materials over stationary surfaces {(the movement being in a helical path F26B 15/26; F26B 17/003, F26B 17/263 take precedence)}
References
Informative references

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

Process with stationary surface conducting heat

F26B 3/20

with movement performed by fluid currents, e.g. issuing from a nozzle, {e.g. pneumatic, flash, vortex or entrainment dryers} (F26B 3/08 takes precedence)
References
Informative references

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

Apparatus using free vortex flow for separating in general

B04C

{pneumatically inducing within the drying enclosure a curved flow path, e.g. circular, spiral, helical; Cyclone or Vortex dryers (swirl or curved flow path induced mechanically, i.e. by rotating element F26B 3/0923)}
References
Limiting references

This place does not cover:

Drying processes for loose materials involving a fluidised bed

F26B 3/08

Informative references

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

Jet Mills, e.g. for drying and milling, having a cyclone or vortex type flow pattern

B02C 19/06

Apparatus using free vortex flow for separating in general

B04C

the materials moving through a counter-current of gas
References
Informative references

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

Drying plastic pellets, e.g. before the extruder

B29B 13/065

with movement performed by shooting or throwing the materials {, e.g. after which the materials are subject to impact (F26B 17/108 takes precedence)}
References
Informative references

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

Auxiliary treatment of plastic granules, e.g. after making them

B29B 9/16

with movement performed by reciprocating or oscillating conveyors propelling materials over stationary surfaces; with movement performed by reciprocating or oscillating shelves, sieves, or trays {(F26B 17/006 takes precedence)}
References
Informative references

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

Auxiliary treatment of plastic granules, e.g. after making them

B29B 9/16

Machines or apparatus for drying solid materials or objects not covered by groups F26B 9/00 - F26B 17/00
Definition statement

This place covers:

Miscellaneous machines and machines of any type for drying solid materials or objects featuring a self contained mobile arrangement, the drying taking place with the mobile machine at rest or with moving machine, e.g. moving along or around the large object to be dried.

Special rules of classification

Combinations of two or more non-mobile machines individually covered by groups F26B 9/00 - F26B 17/00 to be classified in F26B 20/00.

Self contained mobile devices to be classified also in the relevant "stationary" groups F26B 9/00 - F26B 19/00.

{Self-contained mobile devices, e.g. for agricultural produce (movable devices with radiation means F26B 3/28; small self-contained devices for drying objects at rest F26B 9/003)}
References
Limiting references

This place does not cover:

Small self-contained devices for drying objects at rest

F26B 9/003

Informative references

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

Movable devices with radiation means

F26B 3/28

Harvester with Dryer

A01D 41/133

Large containers having means for heating, cooling, aerating or other conditioning of contents

B65D 88/74

Apparatus for drying pavement

E01C 23/14

Drying, or keeping dry, of constructions, e.g. buildings

E04B 1/70

Combinations of machines or apparatus covered by two or more of groups F26B 9/00 - F26B 19/00
Definition statement

This place covers:

Combinations of machines or apparatus, either creating a synergetic effect or being a simple agglomeration, covered by two or more of groups F26B 9/00 - F26B 19/00.

Arrangements {or duct systems, e.g. in combination with pallet boxes,} for supplying and controlling air or gases for drying solid materials or objects ({F26B 9/10 takes precedence; systems for vehicle body drying B60S 3/002} ; air conditioning or ventilation in general F24F)
Definition statement

This place covers:

Arrangements for supplying drying air or gases or steam to the drying apparatus or directly to (or into) the object or solid materials.

Arrangements for routing and circulating the drying air or gases or steam.

Arrangements for controlling the properties of drying air or gases or steam.

Condensing vapour other than steam onto the surface of the materials or objects to be dried.

References
Limiting references

This place does not cover:

Machines or apparatus for drying solid materials in the open air or in large rooms featuring drying air supply arrangements

F26B 9/10

Informative references

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

Processes condensing steam onto the surface of the materials or objects to be dried

F26B 3/00

Details, component parts of blowers in general

F04D 29/00

Valves in general

F16K

{Drying-air generating units, e.g. movable, independent of drying enclosure}
References
Informative references

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

Apparatus for drying pavement

E01C 23/14

Drying of constructions, e.g. buildings

E04B 1/7015

{the gas supply or exhaust being effected through hollow spaces or cores in the materials or objects, e.g. tubes, pipes, bottles (F26B 9/003 and F26B 9/103 take precedence)}
References
Limiting references

This place does not cover:

Small self contained devices

F26B 9/003

Drying air channels placed in a stack

F26B 9/103

Informative references

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

Drying footwear

A47L 23/20

{the objects being flexible articles, which may be blown up by the drying gas, e.g. tubes, sausage casings (fire hoses A62C 33/02)}
References
Informative references

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

Drying fire hoses

A62C 33/02

Providing support for textile articles to be dried, such as garments, gloves or stockings

D06F 59/00

Humidity
References
Informative references

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

Separation of gases and vapours by absorption in general

B01D 53/14

Drying gases

B01D 53/26

{by using sorbent or hygroscopic materials, e.g. chemical substances, molecular sieves}
References
Informative references

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

Separation of gases and vapors by adsorption in general

B01D 53/02

Drying gases by adsorption

B01D 53/261

{by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle}
References
Informative references

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

Treatment of dryer exhaust gas by e.g. condensation

F26B 25/006

Solvent recovery by condensation

B01D 5/00

Solvent recovery by sublimation

B01D 7/00

Separation of gases and vapours by condensation in general

B01D 53/002

Drying gases by condensation

B01D 53/265

{Condensing the vapour onto the surface of the materials to be dried (using condensing steam F26B 3/00; using chemical liquids F26B 5/005)}
References
Informative references

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

Processes condensing steam onto the surface of the materials or objects to be dried

F26B 3/00

Heating arrangements ({by radiation, e.g. infra-red, ultra-violet, solar F26B 3/28 and F26B 3/30} ; using heated air or gases F26B 21/00)
Definition statement

This place covers:

Heating arrangements providing a heat source for drying machines, located outside or within the drying enclosure.Drying air, gas, steam or vapour supply arrangements.

References
Limiting references

This place does not cover:

Radiation heating the drying good

F26B 3/00

{using waste heat}
References
Informative references

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

Waste heat recuperation with combustion

F23G 2206/00

using combustion heating ({F26B 3/305, F26B 13/186, F26B 21/001, } F26B 23/10 take precedence)
References
Limiting references

This place does not cover:

Combustion for generating IR radiation, either through flame radiation or combustion heated tubes

F26B 3/305

Heating rollers for drying materials of long length

F26B 13/186

Drying-air generating units

F26B 21/001

Informative references

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

Arrangements of gas flames for drying materials of long length

F26B 13/22

Waste combustion control aspects

F23G 2207/00

Regulating or controlling combustion

F23N

{using solid fuel; burning the dried product}
References
Informative references

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

Using combustion flue gas to predry fuel

F23G 2206/10

Details of general application not covered by group F26B 21/00 or F26B 23/00 (loading, conveying, and unloading in general B65G)
Definition statement

This place covers:

Details of machines or processes other than arrangements of drying air or gas supply or heating arrangements such as:

Cleaning arrangements, e.g. for drying chambers.

Loading, unloading and other handling of objects or materials to be dried or dried.

Treatment of dryer exhaust gases.

Seals, locks and air curtains for drying enclosures.

Alarm, safety and fire protection systems.

Driving mechanisms specific for drying machines.

Agitating, stirring or scraping devices.

Drying chambers and parts thereof.

Rollers, e.g. for conveying specific to drying machines and their requirements.

Controlling the drying process depending on the liquid content of dried material or wet material being charged.

References
Limiting references

This place does not cover:

Driving mechanisms for rotary drums, e.g. kiln

F26B 11/022

Arrangements for gas sealing drum dryers, e.g. kilns

F26B 11/024

Loading and unloading materials in rotary drums, e.g. kilns

F26B 11/026

Seals, locks for web drying enclosures

F26B 13/005

Rollers and driving mechanisms for rollers for drying material of long length

F26B 13/14

Treatment of dryer exhaust gas through incineration of volatiles

F26B 13/22

Loading and unloading of wicket conveyor

F26B 15/085

Material feeding means for pneumatic, flash or vortex dryers

F26B 17/103

Safety and fire protection system using inert gases

F26B 21/14

Driving mechanisms covered by another subclass, e.g. regarding centrifuges

B04B 9/00

Informative references

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

Mixing or backmixing of wet materials to be charged, thus changing the liquid content

F26B 1/00

Drying process involving brushing or wiping

F26B 5/14

Stationary drying chamber with mechanical agitating device

F26B 9/082

Loading and unloading materials in rotary drums, e.g. kilns

F26B 11/026

Moving stirring devices in stationary drums

F26B 11/12

Moving stirring devices in stationary dishes, tray or pans

F26B 11/22

Arrangements for wiping material of long length, e.g. webs

F26B 13/28

Scraping device to remove dried material from roller or disc, e.g. doctor blade

F26B 17/286

Large containers having means for heating, cooling, aerating or other conditioning of contents

B65D 88/74

Loading, conveying and unloading in general

B65G

Driving mechanisms in connection with general conveying machines

B65G

{for bulk goods (F26B 17/103 takes precedence)}
References
Limiting references

This place does not cover:

Loading and unloading materials in rotary drums, e.g. kilns

F26B 11/026

Material feeding means for pneumatic, flash or vortex dryers

F26B 17/103

Informative references

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

Loading and unloading materials in rotary drums, e.g. kilns

F26B 11/026

Material feeding means for pneumatic, flash or vortex dryers

F26B 17/103

Devices for feeding particles into and evacuation of particles out of the reactor

B01J 8/0015

{Seals, locks, e.g. gas barriers or air curtains, for drying enclosures (F26B 11/024 and F26B 13/005 take precedence)}
References
Limiting references

This place does not cover:

Arrangements for gas sealing drum dryers, e.g. kilns

F26B 11/024

Seals, locks for web drying enclosures

F26B 13/005

Informative references

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

Seals in general

F16J 15/00