D01G PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
Introduced: September 1968
Classification Context
- Section:
- TEXTILES; PAPER
- Class:
- NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- Subclass:
- PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
Description
D01G covers preparatory processes applied to natural or man-made fibres before they enter the spinning stage. This includes cleaning, carding, combing, blending, and other mechanical treatments that condition fibres to improve their properties for subsequent yarn production. The class encompasses equipment and methods for fibre alignment, matting, and preparation of sliver or roving. Processes that occur after spinning (such as yarn twisting or winding) are excluded and fall under different classifications.
Filing statistics
IPC subclass D01G recorded 19,409 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,027 in 2013 to 2,093 in 2023 (+104%), peaking at 2,378 applications in 2020. The most active applicants in class D01 are NATIONAL DONG HWA UNIVERSITY (1,242 applications), MASCHINENFABRIK RIETER (1,162 applications) and TORAY INDUSTRIES (1,093 applications).
Source: EPO PATSTAT, worldwide filings
Related Keywords
19 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- D01G 1/00 Severing continuous filaments or long fibres, e.g. stapling
- D01G 11/00 Disintegrating fibre-containing articles to obtain fibres for re-use
- D01G 13/00 Mixing, e.g. blending, fibres; Mixing non-fibrous materials with fibres
- D01G 15/00 Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
- D01G 17/00 Silk-dressing machines
- D01G 19/00 Combing machines
- D01G 21/00 Combinations of machines, apparatus, or processes, e.g. for continuous processing
- D01G 23/00 Feeding fibres to machines; Conveying fibres between machines
- D01G 25/00 Lap-forming devices not integral with machines specified above
- D01G 27/00 Lap- or sliver-winding devices, e.g. for products of cotton scutchers, jute cards, or worsted gill boxes
- D01G 29/00 Arrangements for lubricating fibres, e.g. in gill boxes
- D01G 3/00 Roughening of fibres
- D01G 31/00 Warning or safety devices, e.g. automatic fault detectors, stop motions
- D01G 33/00 Hand tools for treatment of fibres
- D01G 35/00 Treatment of oakum
- D01G 5/00 Separating, e.g. sorting, fibres
- D01G 7/00 Breaking or opening fibre bales
- D01G 9/00 Opening or cleaning fibres, e.g. scutching cotton
- D01G 99/00 Subject matter not provided for in other groups of this subclass
Top Applicants
Top 10 applicants by patent filingsfor class D01, 2013–2023, worldwide · Source: EPO PATSTAT
- NATIONAL DONG HWA UNIVERSITY 1,242
- MASCHINENFABRIK RIETER CH 1,162
- TORAY INDUSTRIES JP 1,093
- TORAY INDUSTRIES 802
- JIANGNAN UNIVERSITY 771
- WUHAN TEXTILE UNIVERSITY 663
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 653
- CHINESE ACADEMY OF SCIENCES 559
- LENZING AT 525
- MURATA MACHINERY 492