| Patents for B21B 23 - Tube-rolling not restricted to methods provided for in only one of groups , e.g. combined processes (649) |
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| 01/26/1989 | WO1989000464A1 A method of rolling a tubular metal blank |
| 01/03/1989 | CA1247885A1 Seamless tube mill |
| 12/28/1988 | CN88211512U Cold drawing and finish rolling tube mill |
| 12/13/1988 | US4790263 Process for application of free-flowing material on the inner surface of a tube blank and device for performing the process |
| 11/23/1988 | CN88101739A Method for manufacturing tubes, bars and strips |
| 04/06/1988 | EP0262281A1 Process for the production of tubes for use at temperatures up to minus 40 degrees Celsius |
| 01/07/1988 | EP0250881A1 Process for applying a fluent material to the inner side of a hollow body, and apparatus for carrying out the process |
| 07/16/1987 | WO1987004092A1 A method for primarily extending the useful lifespan of ceramic tools, and an arrangement for carrying out the method |
| 04/01/1987 | CN85106430A Internal planet bevelled cold-rolled pipe-making machine |
| 01/07/1987 | CN85105250A Longitudinal-spin rolling method and pipe (bar) rolling machine |
| 12/02/1986 | CA1214714A1 Process for hot deoxidation of semifinished metal tubes |
| 08/12/1986 | US4604928 Section conveying and cooling apparatus |
| 08/12/1986 | US4604887 Plug mill process |
| 05/20/1986 | US4589268 Method of controlling mill pacing |
| 04/23/1986 | EP0178477A1 Method for producing seamless steel tubes with a great diameter |
| 04/01/1986 | US4578974 Seamless tube mill |
| 03/25/1986 | US4577481 Process for production of seamless tube and apparatus for processing seamless tube |
| 02/11/1986 | US4569386 Method of manufacturing a cylindrical billet |
| 02/04/1986 | US4567744 Method and apparatus for forming long cylindrical metal products |
| 12/31/1985 | CA1198614A1 Method for the manufacture of steel bars and rounds exhibiting superior mechanical properties |
| 10/09/1985 | EP0156922A1 Cross helical rolling mill for seamless steel tubes. |
| 04/11/1985 | WO1985001458A1 Inclined rolling mill |
| 02/26/1985 | US4501134 Rolling mill plants |
| 01/29/1985 | CA1181618A1 Seamless pipe manufacturing installation |
| 12/11/1984 | CA1179170A1 Method of manufacturing seamless steel pipes |
| 11/06/1984 | US4480457 Plants for manufacturing seamless tubes |
| 10/02/1984 | US4474627 Hot rolling |
| 09/19/1984 | EP0119154A2 Rolling mill arrangement for the production of seamless steel pipes |
| 06/05/1984 | US4452061 Seamless steel pipe manufacturing installation |
| 03/27/1984 | CA1164251A1 Manufacture of seamless steel tube |
| 11/02/1983 | EP0092629A1 Process for the manufacture of rods and tubes from steels with great mechanical properties |
| 10/18/1983 | US4409810 Process for manufacturing seamless metal tubes |
| 03/01/1983 | US4375160 Manufacture of seamless steel tube |
| 07/13/1982 | CA1127430A1 Method and apparatus for rolling seamless tubes with a restrained mandrel |
| 03/09/1982 | US4318294 Method of manufacturing seamless metal pipes and tubes |
| 01/19/1982 | US4311032 Method and apparatus for rolling seamless tubes with a restrained mandrel |
| 10/27/1981 | US4296622 Device for inserting and thrusting a bar into a press piercing _mill |
| 06/23/1981 | CA1103484A1 Device for inserting and thrusting a bar into a press piercing mill |
| 06/03/1981 | EP0029786A1 Process and device for producing a steel tube without welding joint by hot-rolling on a mandrel |
| 04/21/1981 | US4262516 Pierced metal tube blanks and methods of making such blanks |
| 09/23/1980 | CA1086104A1 Process for the production of seamless tubular products |
| 07/15/1980 | US4212178 Rolling mill |
| 03/04/1980 | CA1072864A1 Combined mechanical and thermal processing method for production of seamless steel pipe |
| 05/29/1979 | CA1055282A1 Shell pusher for plug mill or the like |
| 05/02/1978 | US4086800 Process and rolling mill for stretch reduction of tubes |
| 02/21/1978 | US4075041 Combined mechanical and thermal processing method for production of seamless steel pipe |
| 07/26/1977 | US4037453 Shellpusher for plug mill or the like |
| 06/21/1977 | US4030333 Method and means for separating successive rolling lots |
| 02/08/1977 | US4006618 Method of producing seamless steel tube |