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DIFF Subgroup
B31F 1/24

Making webs in which the channel of each corrugation is transverse to the web feed

Introduced: September 1968

Full Title

Mechanical deformation without removing material, e.g. in combination with laminating > Corrugating; Corrugating combined with laminating to other layers > Making webs in which the channel of each corrugation is transverse to the web feed

Of 6 combined children, 3 exist in both systems.

3 codes are CPC-only extensions.

Child Classifications

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  • B31F 1/242 CPC only CPC only
  • B31F 1/245 CPC only CPC only
  • B31F 1/247 CPC only CPC only
  • B31F 1/29 by making use of rods, e.g. co-operating with a toothed cylinder since 1974 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B31,2013–2023, worldwide · Source: EPO PATSTAT

  1. GPI (GRAPHIC PACKAGING INTERNATIONAL) US 356
  2. KIMBERLY-CLARK CORPORATION US 296
  3. RANPAK CORPORATION US 257
  4. P&G (PROCTER & GAMBLE COMPANY) US 228
  5. BOBST MEX CH 218
  6. JIANGSU NANJIANG MACHINERY COMPANY 214
  7. SINOTECHO (WUHAN) INTELLIGENT TECHNOLOGY COMPANY 209
  8. DONGGUAN HONGMING MACHINERY COMPANY 195
  9. BHS CORRUGATED MASCHINEN- UND ANLAGENBAU DE 192
  10. TETRA LAVAL HOLDINGS & FINANCE CH 183

Top Applicants (CPC)

Class B31,2013–2023, worldwide · Source: EPO PATSTAT

  1. GPI (GRAPHIC PACKAGING INTERNATIONAL) US 496
  2. P&G (PROCTER & GAMBLE COMPANY) US 403
  3. KIMBERLY-CLARK CORPORATION US 332
  4. RANPAK CORPORATION US 279
  5. PULPAC SE 256
  6. BOBST MEX CH 251
  7. TETRA LAVAL HOLDINGS & FINANCE CH 246
  8. PREGIS INNOVATIVE PACKAGING US 210
  9. WESTROCK SHARED SERVICES US 204
  10. BHS CORRUGATED MASCHINEN- UND ANLAGENBAU DE 198