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PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
Definition statement
This subclass/group covers:

The mechanical preparation of plastic material as raw material used in subsequent plastic shaping techniques which form a final product (B29B 7/00, B29B 9/00, B29B 13/00 and B29B 15/00).

The making of preforms used as an intermediate product which will udergo an additional processing step, e.g. blow moulding, to obtain the final product (B29B 11/00).

The recovery of plastics from waste products in order to reuse it for making new products (B29B 17/00).

References relevant to classification in this subclass
This subclass/group does not cover:
Methods, devices directed to the chemical aspects of the plastic preparation, pretreatment or recovery (e.g. chemical composition, use of specific additives, operating steps intended to modify the properties of the polymer, etc.)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Mixing in general
Granulating in general
Solid waste disposal
Special rules of classification within this subclass
  • In this subclass, it is desirable to add the Indexing Codes of subclasses B29K
  • Reference is further made to the special rule of classification in the field of B29B 17/00 as far as the application of Indexing Codes as provided in B29L and B29K is concerned.
  • Products per se are not classified in this subclass. However, if a product is characterised by the way it is produced and not by its structure or composition, the production method should be classified in this subclass.
  • Inventive and additional information disclosed in documents to be classified should be identified by allocation the appropriate classification symbols provided in B29B. In particular attention should be paid to the so called break down Indexing Codes, forming a further subdivision of a group or a subgroup, which are only present at additional information level.
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
A plastic
is defined as a macromolecular compound or composition based on such a compound.
In a plastic state
refers to a state in which the material is more or less easily deformable, locally or as a whole, by force in any direction, to assume and retain any desired shape.
Synonyms and Keywords

In patent documents the following abbreviations are often used:

Resins
Japanese patent applications usually refer to resins instead of plastics
Mixing; Kneading ([N: for preparation of dough A21C 1/00;] in general B01F; combined with calendering B29C 43/24, with injection B29C 45/46, with extrusion B29C 47/36)
Definition statement
This subclass/group covers:

Devices for the preparation of plastics, this preparation only concerning the mechanical aspects of it, i.e. the mixing of the individual components to obtain a homogeneous mass and/or its subsequent mechanical kneading to achieve the desired consistency.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Extrusion of plastics
Special rules of classification within this group

In this subclass, as a general rule, the type of plastic mixer is to be specified, as well as the specific structural elements which are characteristic of this kind of device.

Additional details of the mixing or kneading device for which no specific classification information can be found in B29B 7/00 are classified under the corresponding sub-groups of B01F (mixing in general).

[N: Methods (chemical aspects C08J 3/00)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/002.

[N: for mixing in batches]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/005.

with non-movable mixing or kneading devices
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/04.

[N: by means of axially movable pistons]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/085.

[N: having a casing closely surrounding the rotor, e.g. for masticating rubber (with more than one shaft B29B 7/183); Rotors therefor (B29B 7/14, B29B 7/16 take precedence)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/125.

with screw or helix
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/14.

with paddles or arms
Definition statement
This subclass/group covers:

Illustrative examples of subject matter classified in B29B 7/16.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Recovery of plastics
[N: having a casing closely surrounding the rotors, e.g. of Banbury type (with single shaft B29B 7/125)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/183.

[N: Rotors therefor]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/186.

with intermeshing devices, e.g. screws
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/20.

[N: in mixers having more than one rotor and a casing closely surrounding the rotors, e.g. with feeding plungers]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/246.

[N: with plungers for introducing the material, e.g. from below (B29B 7/246 takes precedence)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/248.

[N: from the underside in mixers having more than one rotor and a a casing closely surrounding the rotors]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/263.

[N: using sliding doors]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/266.

with non-movable mixing or kneading devices
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/32.

[N: Static mixers (in general B01F 5/0602)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/325.

shaking, oscillating or vibrating
Definition statement
This subclass/group covers:

Illustrative examples of subject matter classified in B29B 7/36.

[N: having a casing closely surrounding the rotor, e.g. with a plunger for feeding the material (B29B 7/407, B29B 7/42 take precedence)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/401.

[N: using a rotor-stator system with intermeshing elements, e.g. teeth (B29B 7/408, B29B 7/404 take precedence)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/402.

[N: with feeding or valve actuating means, e.g. with cleaning means]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/404.

[N: with a casing closely surrounding the rotor, e.g. with conical rotor]]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/407.

[N: with mixing elements on a rotor co-operating with mixing elements, perpendicular to the axis of the rotor, fixed on a stator]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/408.

[N: with screw sections co-operating, e.g. intermeshing, with elements on the wall of the surrounding casing]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/422.

[N: and oscillating axially (in general B01F 11/0057)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/423.

[N: with conical screw surrounded by conical casing]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/424.

[N: with screw surrounded by a casing provided with grooves or cavities]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/425.

[N: with consecutive casings or screws, e.g. for charging, discharging, mixing]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/426.

[N: with independently driven screws rotating about the same axis, e.g. oscillating axially; with axially oscillating screws (B29B 7/423 takes precedence)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/427.

with paddles or arms
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/44.

[N: each shaft comprising rotor parts of the Banbury type in addition to screw parts]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/465.

with intermeshing devices, e.g. screws
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/48.

[N: provided with paddles, gears or discs (B29B 7/482 takes precedence)]
Definition statement
This subclass/group covers:

Illustrative examples of subject matter classified in B29B 7/481.

[N: provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs]
Definition statement
This subclass/group covers:

Illustrative examples of subject matter classified in B29B 7/482.

[N: the other mixing parts being discs perpendicular to the screw axis]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/483.

[N: with two shafts provided with screws, e.g. one screw being shorter than the other (B29B 7/482 takes precedence)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in - B29B 7/484.

[N: with three or more shafts provided with screws]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/485.

[N: with screws surrounded by a casing provided with grooves or cavities]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/486.

[N: with consecutive casings or screws, e.g. for feeding, discharging, mixing]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/487.

[N: Screws (B29B 7/482 takes precedence)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/489.

[N: co-operating with casings]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/523.

[N: with two or more rollers]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/526.

with a single roller co-operating with a stationary member [N: other than the casing]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/54.

with co-operating rollers[N: e.g. with repeated action, i.e. the material leaving a set of rollers being reconducted to the same set or being conducted to a next set]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/56.

[N: with means for axially moving the material on the rollers]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/562.

[N: at least one of the rollers being provided with helicoidal grooves or ridges, e.g. followed by axial extrusion]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/564.

[N: provided with means to take material away from a set of rollers and to reconduct it to the same set; provided with endless belts, e.g. which can be in or out of cooperation with at least one of the rollers]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/566.

[N: with consecutive sets of rollers or a train of rollers]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/568.

[N: with driven stirrer]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/7442.

[N: including means for feeding the components]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/7447.

[N: for mixing components by spraying them into each other; for mixing by intersecting sheets]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/7452.

[N: Mixing heads without moving stirrer (B29B 7/7438, B29B 7/76 take precedence)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/7457.

[N: Combinations of dissimilar mixers]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/7461.

[N: Combinations of similar mixers]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/7466.

[N: Mixers in which the mixing takes place at the inlet of a mould, e.g. mixing chambers situated in the mould opening]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/7471.

[N: Plants (B29B 7/7433, B29B 7/7485, B29B 7/7495 take precedence)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/748.

[N: with consecutive mixers, e.g. with premixing some of the components]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/7485.

[N: with stirring means for the individual components before they are mixed together]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/749.

[N: having additional mixing arrangements (B29B 7/7673 takes precedence)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/7605.

[N: the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/7663.

[N: having a second tube intersecting the first one with the jets impinging in the second tube]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/7668.

[N: having additional mixing arrangements (B29B 7/7668 takes precedence)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/7673.

[N: Plunger constructions]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/7689.

[N: comprising recirculation channels; ducts formed in the plunger]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 7/7694.

Making granules (in general B01J; chemical aspects C08J 3/12)
Definition statement
This subclass/group covers:

the mechanical preparation of granules, pellets made of plastic material as raw material and used in subsequent plastic shaping techniques which form a final product. The plastic materials concerned by this subclass are polymeric materials used in the subclasses B29C.

References relevant to classification in this group
This subclass/group does not cover:
Making or treating expandable particles
The mechanical preparation of granules, pellets made of non-polymeric material
Medical preparations characterized by special physical form: particulate form, powder, granulates, microsphere, pellets
Method of shapping (pelletizing, briquetting) of solid fuel made of vegetable substances (wood, forestry or agricultural wates)
by dividing preformed material
Informative references
Attention is drawn to the following places, which may be of interest for search:
Cutting aspects of dividing the preformed material
Developers with toner particles; preparation methods
in the form of plates or sheets
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 9/04.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Disintegrating by knives or other cutting or tearing members which chop material into fragments, specially adapted for disintegrating plastics
in the form of filamentary material, e.g. combined with extrusion
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 9/06.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Disintegrating by knives or other cutting or tearing members which chop material into fragments, specially adapted for desintegrating plastics
Multi-port extrusion nozzles
[N: under-water, e.g. underwater pelletizers]
Definition statement
This subclass/group covers:

The methods and devices for the preparation of granules, pellets made of plastic material as raw material wherein the cutting operation is performed right after extrusion in a water box. Underwater pelletizer includes also the use of other liquids to cool down the extruded plastic material.

Illustrative example of subject matter classified in B29B 9/065.

by agglomerating smaller particles
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 9/08.

US-A-2011/0109013

by moulding the material, i.e. treating it in the molten state
Definition statement
This subclass/group covers:

The methods and devices for the preparation of granules, pellets made of plastic material as raw material wherein no preformed material (e.g. plates, sheets, filamentary matrial as in B29B 9/04 or B29B 9/06) is used.

Illustrative example of subject matter classified in B29B 9/10.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Granulating material in general; by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
Granulating material in general; by dividing the liquid material into drops,in a gaseous medium
Granulating material in general; by dividing the liquid material into drops,in a liquid medium
characterised by structure or composition
Definition statement
This subclass/group covers:

The methods and devices for the mechanical preparation of granules made of plastic material as raw material wherein the granules are defined by their physical structure (e.g. multilayer or compartimentalized granule) or by their composition (e.g. the selection of the granule ingredients has an influence on the method and apparatus used to manufacture the granule).

The documents disclosing only the chemical composition of granules and wherein the mechanical preparation is absent or trivial are classifyed in C08J 3/12.

Illustrative example of subject matter classified in B29B 9/12.

fibre-reinforced
Definition statement
This subclass/group covers:

The methods and devices for the preparation of granules, pellets made of plastic material as raw material wherein the granule comprises long fibres (fibres as long or longer than the granule), short fibres or fibrous material of different shapes.

The granules comprizing fillers (e.g. powder) are classifyed in B29B 9/12.

Illustrative example of subject matter classified in B29B 9/14.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Pretreatment of reinforcement; coating or impregnating of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
Auxiliary treatment of granules
Definition statement
This subclass/group covers:

The methods and devices for the after-treatment of granules, pellets made of plastic material (e.g. absorbing, coating, crystallizing, deforming, purifying).

The chemical aspect of the treatment of granules (e.g. post-polymerization, polycondensation) is classifiyed in C08.

Illustrative example of subject matter classified in B29B 9/16.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
Solid-state polycondensation
Post-polymerisation treatment
Purification; Drying
Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
Solid state polycondensation
Post-polymerisation treatment
Making preforms (B29C 61/06 takes precedence; [N: combined with blow-moulding B29C 49/02, with thermoforming B29C 51/02; making preforms for manufacturing of light guides B29D 11/00721])
Definition statement
This subclass/group covers:

Preforms relating to B29 in general.

Preforms for blow-moulding bottles.

Making of preforms not otherwise provided for.

Informative references
Attention is drawn to the following places, which may be of interest for search:
F-term (Japanese classification) related to making preforms
4F201/BM00
Special rules of classification within this group

The making of preforms (process and apparatus) for which an entry is provided elsewhere, e.g. B29C, is not classified in B29B11/00AND its subgroups.

However, the indexing of preforms for blow-moulding bottles using the coding scheme under B29B 2911/14 is obligatory when the structure of the preform differs from the conventional shape (one layer, open neck, flange, cylindrical body, closed semispherical end).

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Preform
An object obtained by moulding substantially consisting of plastic material, which has to undergo an additional processing step, e.g. blow moulding, to obtain its final shape
Synonyms and Keywords

In patent documents the following expressions/words "preform", "parison" and "blank" are often used as synonyms.

by dividing preformed material, e.g. sheets, rods
Informative references
Attention is drawn to the following places, which may be of interest for search:
F-term (Japanese classification) related to manufacturing preforms by shredding preformed materials
4F201/BM01
by assembling preformed material
Definition statement
This subclass/group covers:

Making preforms by assemblying separate parts, e.g. making a perform for blow moulding by joining a separately moulded neck and thread portion with a separately moulded body portion.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Joining of preformed parts
F-term (Japanese classification) related to manufacturing preforms by assembling preformed materials
4F201/BM02
by moulding the material
Informative references
Attention is drawn to the following places, which may be of interest for search:
F-term (Japanese classification) related to manufacturing preforms by moulding the materials
4F201/BM04
Injection moulding
Informative references
Attention is drawn to the following places, which may be of interest for search:
F-term (Japanese classification) related to manufacturing preforms by injection moulding
4F201/BM05
Special rules of classification within this group

Injection moulding processes and devices for making preforms, whereby the alleged invention lies in the moulding technique as such, are classified in the moulding technique as such (B29C 45/00) and not in this subgroup.

Extrusion moulding
Informative references
Attention is drawn to the following places, which may be of interest for search:
F-term (Japanese classification) related to manufacturing preforms by extrusion moulding
4F201/BM06
Special rules of classification within this group

Extrusion moulding processes and devices for making preforms, whereby the alleged invention lies in the moulding technique as such, are classified in the moulding technique (B29C 47/00) as such and not in this subgroup.

Compression moulding
Informative references
Attention is drawn to the following places, which may be of interest for search:
F-term (Japanese classification) related to manufacturing preforms by compression moulding
4F201/BM07
Special rules of classification within this group

Compression moulding processes and devices for making preforms, whereby the alleged invention lies in the moulding technique as such, are classified in the moulding technique (B29C 43/00) as such and not in this subgroup.

characterised by structure or composition
Definition statement
This subclass/group covers:

E.g. preforms having a special shape or build to be adapted for its further processing steps or use.

Informative references
Attention is drawn to the following places, which may be of interest for search:
F-term (Japanese classification) related to:Shapes, structures
4F201/BM12
F-term (Japanese classification) related to:Layered structures
4F201/BM13
F-term (Japanese classification) related to:Compositions, properties
4F201/BM14
Special rules of classification within this group

The indexing of preforms for blow-moulding bottles using the coding scheme under B29B 2911/14 is obligatory when the structure of the preform differs from the conventional shape (one layer, open neck, flange, cylindrical body, closed semispherical end).

comprising fillers or reinforcement [N: (non-woven fabrics per se D04H 1/00, D04H 3/00)]
Definition statement
This subclass/group covers:

Preforms having fillers/reinforcement where the purpose of subsequent moulding is mentioned

Informative references
Attention is drawn to the following places, which may be of interest for search:
Shaping composites
F-term (Japanese classification) related to: Preforms, including shaping thereof
4F072/AG00
F-term (Japanese classification) related to: Manufacturing preforms
4F072/AH00
Conditioning or physical treatment of the material to be shaped (chemical aspects C08J 3/00) [N: heating, cooling or curing during shaping B29C 35/00; Thermal after-treatment B29C 71/02]
Definition statement
This subclass/group covers:

The methods and devices for the pre-treatment of the plastic material to be shaped prior to the moulding operation.

Illustrative example of subject matter classified in B29B 13/00.

JP59096134

DE1479034 A1

[N: Treatment of sinter powders]
Definition statement
This subclass/group covers:

The methods and devices for the pre-treatment of powder plastic material prior to the moulding operation by sintering.

Illustrative example of subject matter classified in B29B 13/007.

References relevant to classification in this group
This subclass/group does not cover:
Sintering layers coated on a mould
Compression moulding; pressing and sintering powders, granules or fibres
Rapid manufacturing or prototyping of 3D objects; using layers of powder being selectively joined, e.g. by selective laser sintering or melting
[N: Heat treatment of powders]
Definition statement
This subclass/group covers:

The methods and devices for the pre-treatment of the plastic material to be shaped (powder, pellets, granules) by heating prior to the moulding operation.

Illustrative example of subject matter classified in B29B 13/021.

[N: Melting the material to be shaped]
Definition statement
This subclass/group covers:

The methods and devices for the heat treatment of the plastic material to be shaped (powder, pellets, granules) until said plastic material melts prior to the moulding operation.

Illustrative example of subject matter classified in B29B 13/022.

US2207426

Informative references
Attention is drawn to the following places, which may be of interest for search:
Storage, supply or control of liquid or other fluent material; provided with means for heating or cooling the liquid or other fluent material in the supplying means upstream of the applying apparatus
[N: Half-products, e.g. films, plates]
Definition statement
This subclass/group covers:

The methods and devices for the pre-treatment by heating of the plastic material to be shaped, said plastic material being in the form of a film or plate. Said film or plate is a half-product as it has not yet undergone its final shaping operation.

Illustrative example of subject matter classified in B29B 13/023.

References relevant to classification in this group
This subclass/group does not cover:
Heating preforms (film, sheet, plate) prior to thermoforming
[N: Hollow bodies, e.g. tubes or profiles]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 13/024.

References relevant to classification in this group
This subclass/group does not cover:
Heating a tubular preform prior to blow moulding
Ovens specially adapted for heating preforms or parisons
[N: Tube ends]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 13/025.

References relevant to classification in this group
This subclass/group does not cover:
Shaping of tube ends, e.g. flanging, belling, closing; Apparatus therefor
by cooling [N: (cooling moulded articles or half products B29C 35/16)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 13/04.

[N: of powders or pellets]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 13/045.

by drying (B29B 13/08 takes precedence; [N: drying moulded articles or half products B29C 37/0092])
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 13/06.

[N: of powder or pellets]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 13/065.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
by using wave energy or particle radiation
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in B29B 13/08.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Processes of treating or compounding macromolecular substances. Treatment by wave energy or particle radiation
Irradiation devices
by grinding, e.g. by triturating; by sieving; by filtering
Definition statement
This subclass/group covers:

The methods and devices for the mechanical pre-treatment of the plastic material to be shaped by grinding prior to the moulding operation.

Illustrative example of subject matter classified in B29B 13/10.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Disintegrating by knives or other cutting or tearing members which chop material into fragments, specially adapted for disintegrating plastics
Recovery of plastics or other constituents of waste material containing plastics. Disintegrating plastics (e.g. by milling)
Pretreatment of the material to be shaped, not covered by groups B29B 7/00 to B29B 13/00
Definition statement
This subclass/group covers:

The methods and devices wherein the material undergoes a pre-treatment operation that is an operation that modifyes the material to be shaped prior to the moulding operation.

Illustrative example of subject matter classified in B29B 15/00.

Coagulating devices
Definition statement
This subclass/group covers:

The methods and devices wherein the material undergoes a coagulation operation of the material to be shaped prior to the moulding operation wherein the mechanical aspect of the method or device is detailed.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Treatment of polymer emulsions, coagulation
Treatment of rubber latex, coagulation
of reinforcements or fillers (chemical aspects C08J, K)
Definition statement
This subclass/group covers:

Surface modifications, normally chemical but also treatments like preheating or carving, of reinforcements or fillers typically to improve the adhesion with the matrix

[N: of reinforcement of definite length with a matrix in solid form e.g. powder, fibre or sheet form (calendering B29C 70/506)]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Treatments of textile materials by liquids, gases or vapours
Artificial leather obtained by covering fibrous webs with macromolecular material
[N: with a matrix in liquid form, e.g. as melt, solution or latex]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Matrix in powder form
B29K105/25B
Matrix in the form of sheet
B29K105/25C4
Recovery of plastics or other constituents of waste material containing plastics; ([N: volume reduction of waste plastics, e.g. by mechanical compacting or melting disposal of solid waste B09B;] chemical recovery C08J 11/00)
Definition statement
This subclass/group covers:

Processes as well as the corresponding machinery for recovering plastics, as well as other constituents of waste material containining plastics

References relevant to classification in this subclass/group
This subclass/group does not cover:
Reuse of recycled material in moulding processes as such, e.g. in compression moulding
Informative references
Attention is drawn to the following places, which may be of interest for search:
Volume reduction of waste plastics other than plastic containers
General arrangement of separating plants for refuse
Special rules of classification within this group

In this group including its subgroups, it is highly desirable to add the Indexing Codes B29K for the type of plastic material to be recycled, and the Indexing Codes B29L for the type of product to be recycled.

In this group including its subgroups, only the type of plastic material to be recycled shall be classified by the B29K Indexing Codes. Any non-recycled material, e.g. virgin material, which is added during the recycling process shall not be classified by such B29K Indexing Codes.

Synonyms and Keywords

In patent documents the following words "waste", "scrap", "recycling", "recycled", "recovery", "recovering", "salvage", "salvaged", "reclaim", "reclaimed", "reprocessed", "reprocessing", "regrind", "reground", "discard", "discarded", "discarding" and "rubbish" are often used as synonyms.

[N: Direct recuperation and re-use of scrap material during moulding operation, i.e. feed-back of used material]
Definition statement
This subclass/group covers:

Recycling processes, as well as the corresponing machinery, whereby the recovery of plastics is combined with the direct reuse of said material in a molding process.

Typical examples are:

  • Re-use by regrinding the hardened runner/sprue and feeding it into the hopper of an injection moulding machine.
  • Re-use by regrinding or directly feeding the side-trim in plastic film extrusion to the hopper of the extruder.
Informative references
Attention is drawn to the following places, which may be of interest for search:
Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like, made of synthetic polymers
[N: by agglomeration or compacting]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Dietetic products with reduced nutritive value, by addition of substantially indigestible substances, i.e. Cellulose or derivatives
Making particle boards or fibreboards, with preformed covering layer
Making discontinuous sheets of paper, pulpboard or cardboard, or of wet web, for fibreboard production
[N: of large particles, e.g. beads, granules, pellets, flakes, slices]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Making granules
[N: for shaping parts, e.g. multilayered parts with at least one layer containing regenerated plastic]
Definition statement
This subclass/group covers:

Recovery of plastics or other constituents of waste material containing plastics by an agglomeration or compacting process. The recovered material is used for shaping parts, e.g. compacting plastic waste particles in a heated compression mould for obtaining a discrete article. Possibly with the addition of a binding agent, i.e. urethane.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Layered products essentially comprising synthetic resin made from or containing mainly scrap material
B32B27/00B
Destroying solid waste or transforming solid waste by agglomeration, binding or encapsulation using an organic binder or matrix
Special rules of classification within this group

In this group, it is highly recommended to add additional classification in the shaping technique concerned, e.g. B29C 43/00 for compression moulding, B29C 45/00 for injection moulding.

[N: Compacting complete waste articles]
Definition statement
This subclass/group covers:

Recovery of plastics or other constituents of waste material containing plastics by an agglomeration or compacting process, whereby a complete wasted article is compacted, e.g. recovery of plastic containers, e.g. PET bottles by volume reduction.

[N: Hollow articles, e.g. bottles]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Presses specially adapted for consolidating scrap metal or for compacting used cars
Separating plastics from other materials
Definition statement
This subclass/group covers:

Recovery of plastics or other constituents of waste material containing plastics whereby the recovered material is separated from other materials, e.g. one type of plastics, e.g. PE is seperated from another type of plastics, e.g. PA, by density separation in a water bath.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Wet separating by sink-float separation
Separating by pneumatic tables or by pneumatic jigs
[N: using local heating of the reinforcement]
Definition statement
This subclass/group covers:

Recovery of plastics or other constituents of waste material containing plastics whereby the matrix material is separated selectively from the reinforcements by destroying the interface bound before desintegrating the matrix to particles or powder using local heating of the reinforcement, e.g. heating of tires or conveyor belts, e.g. by induction heating, for softening the rubber matrix around the then hot steel wires.

Disintegrating plastics, [N: e.g. by milling ] (B29B 9/02, B29B 11/02, B29B 13/10, [N: B29B 17/02 ] take precedence)
Definition statement
This subclass/group covers:

Processes as well as the corresponding machinery for recovering plastics, as well as other constituents of waste material containining plastics, whereby the plastic material is disintegrated.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Disintegrating by knives or other cutting or tearing members which chop material into fragments
Especially adapted for disintegrating plastics, e.g. cinematographic films
For plastic bottles
Cutting through work characterised by the nature or movement of the cutting member; Apparatus or machines therefor; Cutting members therefor
Especially adapted for cutting rubber
B26D1/00D
For cutting used tyres
B26D1/00D2
Special rules of classification within this group

In this group including its undergroups, it is highly desirable to add additional B29B 2017/0424 Indexing Codes for the type of disintegrating technique.

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Last Modified: 10/11/2013