| 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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| 09/08/1999 | CN2336889Y Reducing tube diagonal rolling equipment |
| 08/17/1999 | US5938865 Process for producing high-strength seamless steel pipe having excellent sulfide stress cracking resistance |
| 08/11/1999 | EP0934781A2 Method for manufacturing a cylinder liner |
| 07/27/1999 | US5927122 Device for guiding a hollow blank |
| 07/21/1999 | CN1044205C Full-floating plug continuously rolling process |
| 06/29/1999 | US5916318 Machine for simultaneously forming threads or fins on multiple cylindrical workpieces |
| 05/27/1999 | DE19751205A1 Method for skew rolling of thin walled hollow components |
| 05/06/1999 | EP0913211A2 Method and device for reducing the wall thickness of a hollow block |
| 04/22/1999 | WO1999019093A1 Piercing mill |
| 04/22/1999 | WO1999019092A1 Apparatus and method for changing piercer roll of vertical piercing mill |
| 04/22/1999 | WO1999019091A1 Apparatus and method for changing disc roll of vertical piercing mill |
| 04/22/1999 | WO1999019090A1 Piercing mill and method of changing cannon |
| 04/22/1999 | WO1999019089A1 Piercing mill |
| 04/07/1999 | CN1213330A Method and device for producing hollow body from solid round steel |
| 02/03/1999 | EP0764063B1 Method of producing a seamless hot-finished tube |
| 01/13/1999 | CN2303690Y Fungiform punching machine |
| 01/12/1999 | US5859124 Mixture of alkali silicate, silane coupling agent, selected alkali compound, water |
| 01/06/1999 | CN1041497C Top head for metal tube rolling mill and its making method |
| 12/30/1998 | EP0886550A1 Method and device for producing a hollow body from solid round steel |
| 12/23/1998 | EP0885667A2 Skew-rolling mill for stretching a seamless hollow body heated to a forming temperature |
| 12/09/1998 | EP0882526A2 Method and device for preventing or reducing trumpet-shaped widenings on a pipe end by skew rolling of thin-walled pipes |
| 12/09/1998 | CN1041133C Aluminium pipe production process, electrophotographic photosensitive member produced by said process |
| 11/03/1998 | US5829292 Rolling annular workpieces |
| 10/29/1998 | DE19721260C1 Roll changing unit for three roll skew rolling mills |
| 10/22/1998 | DE19732444C1 Prevention of back end losses of hot rolled pipes produced on Assel roll stands |
| 10/07/1998 | EP0868947A2 Device for guiding a loop |
| 10/07/1998 | CN2293397Y 三辊轧机 Three roll mill |
| 10/06/1998 | US5816087 Method for producing a seamless steel tubular product |
| 09/24/1998 | DE19725314C1 Skew-rolling mill for elongation of seamless hollow blank heated to forming temperature |
| 09/24/1998 | DE19711257A1 Sensor for a planetary skew rolling mill as a CCD camera |
| 08/19/1998 | CN2288023Y Device for rotary rolling multi-head spiral groove tube and axial groove tube |
| 07/29/1998 | CN1189111A Seamless steel pipe manufacturing method and equipment |
| 07/14/1998 | US5778714 Method for manufacturing seamless pipe |
| 07/14/1998 | CA2126997C A delayed hydride cracking resistant seamless pressure tube made of zirconium (zr) alloy, and manufacturing method thereof |
| 07/09/1998 | WO1998029204A1 Plug and mandrel bar for rolling of seamless steel pipe and method of manufacturing seamless steel pipe |
| 05/20/1998 | EP0842715A1 Seamless steel pipe manufacturing method and equipment |
| 05/13/1998 | CN1181414A Lubricant compsn. for heat working |
| 05/06/1998 | EP0839895A2 Lubricant for use in hot work tools |
| 03/11/1998 | EP0828007A1 Process for producing high-strength seamless steel pipe having excellent sulfide stress cracking resistance |
| 02/03/1998 | US5713234 Piercing-rolling method and piercing-rolling apparatus for seamless tubes |
| 01/15/1998 | WO1998001589A1 Process for producing weldless steel pipes |
| 01/13/1998 | US5707726 Aluminum pipe production process, electrophotographic photosensitive member produced by the production process, and electrophotographic apparatus having the electrophotographic photosensitive member |
| 12/23/1997 | US5699690 Method and apparatus for manufacturing hollow steel bars |
| 11/26/1997 | EP0808679A1 Rolling annular workpieces |
| 11/13/1997 | DE19628715C1 Seamless steel pipe production |
| 11/11/1997 | US5685187 Arrangement for inclined rolling of tube- and bar-shaped rolling articles |
| 10/30/1997 | WO1997039843A1 Seamless steel pipe manufacturing method and equipment |
| 10/28/1997 | US5681406 Cross rolling at below 600 degrees celcius to expand diameter and improve texture of heat extruded or drawn seamless tube |
| 10/22/1997 | EP0801996A1 Method for producing a seamless steel tubular product |
| 10/22/1997 | CN1162508A Method for designing roll passes of three roller extension diameter reducing apparatus |
| 10/01/1997 | EP0798057A1 Calibration of the shoulder roll of an Assel mill |
| 10/01/1997 | CN1160614A Seamless stainless-steel pipe smelting and rolling technology |
| 09/18/1997 | WO1997033707A1 Method and device for producing a hollow body from solid round steel |
| 09/18/1997 | DE19611782A1 Verfahren und Vorrichtung zum Herstellen eines Hohlkörpers aus massivem Rundstahl Method and apparatus for producing a hollow body from solid round steel |
| 09/10/1997 | CN2261894Y Spring constant force balance quick sizing mill for changing roll |
| 08/13/1997 | EP0788846A2 Device for guiding a loop |
| 07/24/1997 | DE19613715C1 Calibration of slant rolling mill |
| 07/23/1997 | CN1154880A Mfg. method for square steel pipe and mfg. method for circular steel pipe |
| 07/22/1997 | US5649440 Method for calibration of assel rollers |
| 07/08/1997 | US5644938 Method of and roll stand for diagonal rolling of tubes |
| 07/01/1997 | US5642638 Process for the rolling of hallow ingots on a assel rolling mill |
| 06/11/1997 | CN2255884Y Piercing mill head with internal rib guiding water cooling system |
| 06/10/1997 | US5636542 Piercing-rolling method and piercing/rolling apparatus for seamless steel tube |
| 05/28/1997 | CN1150767A Method of producing seamless hot-finished tube |
| 04/23/1997 | EP0632752A4 Piercing mill for seamless tube manufacture. |
| 03/26/1997 | EP0764063A1 Method of producing a seamless hot-finished tube |
| 03/19/1997 | CN1145597A Method and appts. for piercing seamless metal pipe |
| 03/12/1997 | EP0761826A2 Method for manufacturing seamless pipes |
| 02/26/1997 | CN2248100Y New-type multi-roll cold-reducing mill head |
| 02/12/1997 | CN2247062Y Circular rolling device for hollow remelting rolling stainless seamless steel pipe |
| 01/22/1997 | EP0754503A1 Method and apparatus for piercing seamless metal pipe |
| 01/21/1997 | US5595848 Electrophotographic photosensitive member produced from aluminum pipe |
| 01/02/1997 | EP0750951A1 Method and apparatus for manufacturing hollow steel bars |
| 11/21/1996 | WO1996036742A1 Process for producing high-strength seamless steel pipe having excellent sulfide stress cracking resistance |
| 11/20/1996 | EP0743106A1 Method for manufacturing seamless pipe |
| 11/14/1996 | DE19516595A1 Method and appts. for pierce rolling seamless steel pipes |
| 11/13/1996 | CN1135382A Method for boring/rolling seamless steel pipe and apparatus thereof |
| 08/28/1996 | CN1129616A Alignment of rollers |
| 07/25/1996 | DE19510721C1 Angled rolling device for tubes or rods |
| 07/25/1996 | DE19510715C1 Angled rolling device for tubes or rods |
| 07/24/1996 | EP0423159B1 Method and arrangement for reducing the outer diameter and wall thickness of an essentially cylindrical hollow rough-pierced tube blank by rolling |
| 07/18/1996 | WO1996021526A1 Method and apparatus for piercing seamless metal pipe |
| 05/22/1996 | EP0712673A1 Calibration of Assel rolls |
| 04/24/1996 | CN1120981A Correction of roller of oblique roller rolling mill |
| 04/10/1996 | CN2224041Y Rotational-moulding rolling apparatus |
| 04/03/1996 | CN1119562A Full-floating plug continuously rolling process |
| 03/27/1996 | EP0703015A1 Calibration for the rolls of a skew-rolling mill |
| 03/27/1996 | EP0703014A1 Method for rolling hollow blocks in an Assel rolling mill |
| 03/13/1996 | CN1118286A Method of rolling hollow pipe block in rolling machine |
| 02/22/1996 | DE4428530A1 Pipe mfr., e.g. cross-rolling of pipes with medium or low wall thickness |
| 02/07/1996 | EP0695598A1 Method of manufacturing dissimilar metal transition pipe joint |
| 01/31/1996 | CN1115696A Piercing head and tube-rolling method for rolling thin-wall hollow billet in two-high mill |
| 01/04/1996 | DE4423683A1 Mfg. of hot rolled seamless steel tubes avoiding formation of rolled-in laps |
| 01/03/1996 | CN2216438Y Conical roll core rod compound extender |
| 01/02/1996 | US5479805 Two-high cross rolling mill with guide disks |
| 12/27/1995 | EP0688617A1 Method and device for rolling of hollow work pieces |
| 12/26/1995 | US5477719 Inclined-rolling method and inclined rolling apparatus |
| 12/21/1995 | WO1995034387A1 Method of producing a seamless hot-finished tube |
| 12/21/1995 | CA2192970A1 Method of producing a seamless hot-finished tube |
| 11/16/1995 | DE4431410C1 Method for rolling hollow block on roller mechanism |