Cooperative Patent Classification

CPC Definition - Subclass D01B

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Last Updated Version: 2016.11
MECHANICAL TREATMENT OF NATURAL FIBROUS OR FILAMENTARY MATERIAL TO OBTAIN FIBRES OF FILAMENTS, e.g. FOR SPINNING (crude extraction of asbestos fibres from ores B03B; apparatus for retting D01C)
Definition statement

This place covers:

The extraction of staple fibres, i.e. fibres of limited length, from natural materials like the seeds, leaves or stalks of plants or from silk.

References
Informative references

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

The extraction of mineral fibres like from ores, e.g. asbestos

Chemical treatment of natural filamentary or fibrous material to obtain filaments or fibres for spinning (e.g. chemical retting)

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Fibre

a relatively-short, elongated member of natural or artificial material

Filament

an endless or quasi-endless, elongated member of natural (e.g. silk) or artificial material

Yarn

a unitary assembly of fibres, usually produced by spinning

Thread

an assembly of yarns or filaments, usually produced by twisting

Mechanical separation of fibres from plant material, e.g. seeds, leaves, stalks
Definition statement

This place covers:

The process steps used in separating fibres from the seeds (mainly cotton) and stalks or leaves (mainly flax or hemp) of plant material.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Stalk

the main stem of a herbaceous plant.

Ginning
Definition statement

This place covers:

The initial separation of harvested fibres and seeds in so called ginning machines.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Ginning

the process of separating cotton fibres from their seeds and other agricultural waste

Rippling
Definition statement

This place covers:

An early stage process of pulling the dry flax plants through coarse combs for removing the seeds from the stalks.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Rippling

the process of removing the seeds from the flax stalks

Breaking or scutching, e.g. of flax; Decorticating
Definition statement

This place covers:

The mechanical separation of fibres from the wood of the stalks.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Scutching

the process whereby the woody portion of the stalks is removed by crushing them between two metal rolls

Drying retted fibres
Definition statement

This place covers:

Only the drying methods and apparatuses of fibres obtained from retting.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Retting

a process employing the action of bacteria and moisture on stalks (e.g. flax stalks) to dissolve or rot away much of the cellular tissues and gummy substances (i.e. pectin) surrounding bast-fibre bundles (i.e. fibre loosening). Basic methods include natural retting (i.e. dew retting or water retting) or chemical retting.

Mechanical removal of impurities from animal fibres (carbonising rags to recover animal fibres D01C 5/00)
Definition statement

This place covers:

The mechanical cleaning of wools (e.g. scouring and cleaning stages to remove organic, vegetal and mineral matters).

Hackling or heckling machines (hand heckling tools D01G 33/00)
Definition statement

This place covers:

The combing out of flax or hemp fibres by hackling devices, that perform a discontinuous linear combing movement (i.e. by combs that get finer and finer) to separate stalk remains from the fibres.

Obtaining silk fibres or filaments
Definition statement

This place covers:

The extraction of silk filaments from silkworm cocoons, and their conversion into staple fibres.

Special rules of classification

Silk being commonly classified as a "natural fibre" is actually a continuous filament.

Reeling silk
Definition statement

This place covers:

The unwinding of silk cocoons to gain the silk filament.

Other mechanical treatment of natural fibrous or filamentary material to obtain fibres or filaments
Definition statement

This place covers:

Other mechanical treatment of natural fibrous or filamentary material to obtain fibres or filaments (e.g. fibre content determination, colour alteration at fibre processing level).