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IPC Subgroup
B21B 19/12

the axes of the rollers being arranged essentially parallel to the axis of the work

Introduced: September 1968

Last revised: January 2006

Full Title

Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work > the axes of the rollers being arranged essentially parallel to the axis of the work

Classification Context

Section:
PERFORMING OPERATIONS; TRANSPORTING
Class:
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
Subclass:
ROLLING OF METAL

2 direct subcodes

Child Classifications

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  • B21B 19/14 Rolling tubes by means of additional rollers arranged inside the tubes
  • B21B 19/16 Rolling tubes without additional rollers arranged inside the tubes

Top Applicants

Top 10 applicants by patent filingsfor class B21, 2013–2023, worldwide · Source: EPO PATSTAT

  1. JFE STEEL 2,318
  2. JFE STEEL JP 2,294
  3. POSCO (POHANG IRON AND STEEL COMPANY) KR 2,083
  4. NIPPON STEEL CORPORATION JP 1,650
  5. NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 1,631
  6. SMS GROUP DE 1,472
  7. BAOSHAN IRON & STEEL COMPANY 1,181
  8. SGCC(STATE GRID CORPORATION OF CHINA) 1,079
  9. ANHUI JIANGHUAI AUTOMOBILE 984
  10. HYUNDAI STEEL COMPANY KR 980