| Patents for B21B 19 - Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work (1,478) |
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| 09/28/1995 | DE4433397C1 Set-up of the rolls of a skew rolling mill |
| 08/15/1995 | US5440911 Pre-reduction equipment and method |
| 05/11/1995 | DE3844802C2 Method of piercing and manufacturing seamless tubes |
| 04/18/1995 | US5406820 Piercing mill for seamless tube manufacture |
| 03/30/1995 | DE4333284A1 Process for the production of a hollow metal ingot |
| 01/11/1995 | EP0632752A1 Piercing mill for seamless tube manufacture |
| 01/11/1995 | CN1097153A Hot-piercing and hot rolling process for production of hollow steel |
| 11/09/1994 | CN2182005Y Extender |
| 10/27/1994 | DE4313648A1 Process and apparatus for the production of seamless tubes by pressure-rolling |
| 10/12/1994 | EP0619150A1 Vertical piercer mill |
| 06/15/1994 | EP0601680A1 Method of guiding a rough-pierced tube blank |
| 03/22/1994 | US5295379 For the manufacture of seamless tubing |
| 03/10/1994 | DE4308721C1 Skew rolling mill with driven guide wheels - has automatic adjusting and swivelling system to facilitate guide wheel exchange |
| 03/02/1994 | EP0156922B2 Cross helical rolling mill for seamless steel tubes. |
| 02/16/1994 | CN1082211A Aluminum pipe production process, electrophotographic photosensitive member produced by the production process adn electrophotographic apparatus having the electrophotographic photosensitive member |
| 11/09/1993 | US5259547 Method of manufacturing bi-metallic tubing |
| 11/04/1993 | DE4214512A1 Mfg. rotationally symmetric titanium@ alloy components shaped as tubes pots or cones - comprises cold forming by means of press roll sets |
| 10/20/1993 | EP0565726A1 Method and device for processing of articles |
| 09/30/1993 | WO1993018870A1 Piercing mill for seamless tube manufacture |
| 08/18/1993 | CN1021802C Hot rail three roller combined piercing for seamless pipe |
| 08/04/1993 | EP0553876A1 Aluminum pipe production process, electrophotographic photosensitive member produced by the production process, and electrophotographic apparatus having the electrophotographic photosensitive member |
| 07/07/1993 | EP0550256A1 Inclined-rolling method and inclined-rolling apparatus |
| 06/17/1993 | DE4140948A1 Mfg.tubular components from conventional tubular blanks - combines expanding and flow-turning, with expanding mandrel and rollers engaging in one plane |
| 03/17/1993 | CN1069915A Top head for metal tube rolling mill and its making method |
| 02/23/1993 | CA1313780C Method for manufacturing tubes, bars and strips |
| 02/04/1993 | WO1993001894A1 Method and device for processing of articles |
| 01/13/1993 | EP0522723A2 Method of manufacturing 2-or 3-layered metallic tubing |
| 01/13/1993 | CA2072465A1 Method of manufacturing bi-metallic tubing |
| 12/02/1992 | CN1019276B Method and apparatus for tube-rolling of reducing tube bloom extremity |
| 10/22/1992 | DE4112614A1 Mandrel for cold and/or hot rolling metal articles - has alternating high-strength antiwear and antifriction surfaces |
| 09/23/1992 | CN1018336B Horizontal type dual-roller not-rolled tube piercer with dynamic stabilization |
| 09/22/1992 | CA1307681C Seamless tube production |
| 09/01/1992 | US5142893 Tube mill |
| 06/30/1992 | US5125251 Method and apparatus to reduce the outer diameter and wall thickness of a hollow tube blank by rolling |
| 05/26/1992 | US5115656 Method and apparatus for manufacturing medium-walled and thin-walled seamless pipes |
| 04/09/1992 | DE4133323A1 Process for making round billet for steel tube production - useful for making tube for oil industry, etc., tubes thus produced have fewer internal cracks, flaws etc., economic |
| 03/25/1992 | EP0476793A2 Rolling mill for stretching hollow blanks on a mandril |
| 03/03/1992 | CA1296553C Method of piercing and manufacturing seamless tubes |
| 02/25/1992 | US5090611 Method of making a cross joint between pipes |
| 12/18/1991 | CN2090742U Rotary mould rolling equipment |
| 10/30/1991 | CN1055681A Hot rail three roller combined piercing mill for seamless pipe |
| 09/12/1991 | DE4007406A1 Bevel rolling medium and thin walled seamless tubing - using work rolls with dia. reducing work surface followed by wall polishing work surface |
| 09/11/1991 | EP0445899A1 Method for manufacture of medium- and thinwalled seamless pipes and rolling device therefor |
| 07/24/1991 | EP0339033B1 Double roller crossrolling mill for piercing and stretching solid and hollow blocks |
| 07/24/1991 | CN1013249B Method for piercing and preparing seamless steel tube |
| 06/12/1991 | CN1052062A Horizontal type dual-roller hot-rolled tube piercer with dynamic stabilization |
| 06/06/1991 | DE4015306C1 Metal tube mfg. installation - has preformed, heated metal block removable from press before introduction of nitrogen gas |
| 02/12/1991 | US4991419 Method of manufacturing seamless tube formed of titanium material |
| 12/18/1990 | CA1278073C Method of and apparatus for controlling operation of a cross helical rolling mill |
| 12/11/1990 | US4976127 Double roller crossrolling mill for piercing and stretching of solid and hollow blocks |
| 08/30/1990 | DE3905559A1 Cross-rolling mill for the manufacture of seamless tubes |
| 08/28/1990 | US4951490 Method for automatically controlling spinning rolls |
| 05/29/1990 | US4928507 Methods and apparatus for manufacturing seamless tube |
| 05/23/1990 | EP0369795A2 Method of manufacturing seamless tube formed of titanium material |
| 05/09/1990 | EP0367358A2 Method of making semi-finished products |
| 02/28/1990 | CN1039981A Method and apparatus for tube-rolling of reducing tube bloom extremity |
| 01/25/1990 | WO1990000449A1 Method and arrangement for reducing the outer diameter and wall thickness of an essentially cylindrical hollow rough-pierced tube blank by rolling |
| 01/25/1990 | WO1990000448A1 Rolling mill and method |
| 11/02/1989 | EP0339033A1 Double roller crossrolling mill for piercing and stretching solid and hollow blocks. |
| 10/31/1989 | US4876870 Cold rolling |
| 09/26/1989 | CA1260737A1 Setting process for slanted roll rolling mill, and said type of mill |
| 09/26/1989 | CA1260414A1 Integral joint forming of work-hardenable high alloy tubing |
| 07/18/1989 | US4848124 Making seamless pipes, over 200 mm in diameter |
| 06/07/1989 | EP0156922B1 Cross helical rolling mill for seamless steel tubes. |
| 05/09/1989 | US4827750 Method of piercing and manufacturing seamless tubes |
| 05/09/1989 | US4827749 Methods and apparatus for reducing seizing in transverse rolling of seamless tube blanks |
| 04/04/1989 | CA1251954A1 Cross helical rolling mill |
| 03/07/1989 | US4809423 Making seamless steel pipes |
| 02/14/1989 | US4803861 Guide structure for pierced hollows |
| 01/17/1989 | US4798071 Seamless tube production |
| 01/03/1989 | CA1247885A1 Seamless tube mill |
| 12/07/1988 | CN88101659A Method for piercing and preparing seamless steel tube |
| 12/07/1988 | CN87104833A Curved roll of composite type oblique rolling mill |
| 11/24/1988 | DE3715803A1 Vorrichtung zum radialen fuehren von rotierenden dornstangen und rohrluppen Apparatus for radial lead by rotating mandrel rod and tube blanks |
| 11/23/1988 | CN88101739A Method for manufacturing tubes, bars and strips |
| 10/13/1988 | DE3809272A1 Method of piercing and manufacturing seamless tubes - involves single pass forming lath set feed and cross angles |
| 09/20/1988 | US4771624 Thrust mount for tube rolling mills |
| 08/30/1988 | US4766752 Machine tool for the production of tubular components |
| 08/17/1988 | CN87203484U Half-shaft sleeve of light-automobile rear axle and its lateral rolling machine |
| 08/04/1988 | DE3702066A1 Cold-rolling mill for large tubes |
| 08/04/1988 | DE3702064A1 Cross-rolling mill for large and extra large seamless tubes |
| 08/02/1988 | US4760724 Method of and apparatus for controlling operation of a cross helical rolling mill |
| 06/30/1988 | WO1988004583A1 Double roller crossrolling mill for piercing and stretching solid and hollow blocks |
| 05/31/1988 | US4747431 Integral joint forming of work-hardenable high alloy tubing |
| 04/19/1988 | US4738128 Skew-rolling stand |
| 04/07/1988 | DE3644780C1 Two-roll cross-rolling mill with driven rolls arranged one above the other |
| 04/06/1988 | CN86103262B Angle pipe-rolling mill fitted with pipe end diameter-decreasing unit |
| 01/14/1988 | DE3717698A1 Verfahren und anlage zum herstellen nahtloser rohre Method and system for the manufacture of seamless pipes |
| 01/14/1988 | DE3621786A1 Skew rolling stand for piercing ingots |
| 12/22/1987 | CA1230508A1 Base structure for supporting a gear box, particularly for the rolls of a crossed-stand type rolling mill |
| 12/15/1987 | US4712407 Apparatus for working surface of metal pipe |
| 07/22/1987 | CN86105420A Roller for tubes skew rolling mill |
| 05/21/1987 | DE3540585A1 Skew rolling mill |
| 04/28/1987 | US4660398 Process for controlling a rolling mill having oblique rolls and a rolling mill for carrying out this process |
| 04/08/1987 | CN85106452A Pipe rolling and piercing mills with three-roll negative chracteristic skewangle rolling. |
| 04/08/1987 | CN85106451A Six-roll vertical type skew rolling mill for hot-rolled pipes |
| 04/01/1987 | CN85106430A Internal planet bevelled cold-rolled pipe-making machine |
| 03/17/1987 | US4649728 Integral joint forming of work-hardenable high alloy tubing |
| 01/24/1987 | CN86103262A Angle pipe-rolling mill fitted with pipe end diameter-decreasing unit |
| 12/17/1986 | EP0204878A2 Cross-rolling mill |