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IPC Main Group
D02G 1/00

Producing crimped or curled fibres, filaments, yarns or threads, giving them latent characteristics

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
TEXTILES; PAPER
Class:
YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
Subclass:
CRIMPING OR CURLING FIBRES, FILAMENTS, YARNS, OR THREADS; YARNS OR THREADS

Related Keywords

CRIMPING of fibres, filaments, yarns or threadsCURLING of fibres, filaments, yarns or threadscrimping or curling FIBRES

7 direct subcodes

Child Classifications

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  • D02G 1/1 using knife edges, e.g. heated knife edges, for edge crimping
  • D02G 1/12 using stuffer boxes
  • D02G 1/14 using grooved rollers or gear-wheel-type members
  • D02G 1/16 using jets or streams of turbulent gases, e.g. air, steam
  • D02G 1/18 by combining fibres, filaments, or yarns, having different shrinkage characteristics
  • D02G 1/2 Combinations of two or more of the above-mentioned operations or devices; After-treatments for fixing crimp or curl

Top Applicants

Top 10 applicants by patent filingsfor class D02, 2013–2023, worldwide · Source: EPO PATSTAT

  1. JIANGNAN UNIVERSITY 383
  2. TORAY INDUSTRIES JP 349
  3. TORAY INDUSTRIES 281
  4. OERLIKON TEXTILE & COMPANY DE 224
  5. CONTINENTAL REIFEN DE 208
  6. NATIONAL DONG HWA UNIVERSITY 203
  7. KOLON INDUSTRIES KR 188
  8. WUHAN TEXTILE UNIVERSITY 184
  9. COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN FR 176
  10. TMT MACHINERY 155