EP0108193A2 - Presse à courber des tubes - Google Patents

Presse à courber des tubes Download PDF

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Publication number
EP0108193A2
EP0108193A2 EP83106429A EP83106429A EP0108193A2 EP 0108193 A2 EP0108193 A2 EP 0108193A2 EP 83106429 A EP83106429 A EP 83106429A EP 83106429 A EP83106429 A EP 83106429A EP 0108193 A2 EP0108193 A2 EP 0108193A2
Authority
EP
European Patent Office
Prior art keywords
bending
machine according
pipe
template
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83106429A
Other languages
German (de)
English (en)
Other versions
EP0108193B2 (fr
EP0108193B1 (fr
EP0108193A3 (en
Inventor
Rigobert Dipl.-Ing. Schwarze
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Individual
Original Assignee
Individual
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6177313&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0108193(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of EP0108193A2 publication Critical patent/EP0108193A2/fr
Publication of EP0108193A3 publication Critical patent/EP0108193A3/de
Application granted granted Critical
Publication of EP0108193B1 publication Critical patent/EP0108193B1/fr
Publication of EP0108193B2 publication Critical patent/EP0108193B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/12—Bending rods, profiles, or tubes with programme control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
    • B21D9/07—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only
    • B21D9/073—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only with one swinging forming member

Definitions

  • the invention relates to a pipe bending machine with an elongated machine frame, in which the feed carriage is moved in the region of an upper longitudinal edge, which carries the clamping sleeve that clamps the tube, and furthermore, at a head end of the machine frame, the bending table rotatable about a vertical axis of rotation is present, on which the bending template is fixed, the bending template continues to interact with a clamping jaw and an existing in the area of the upper longitudinal edge on the side of the feed carriage.
  • Pipe bending machines with the features described above are known for cold bending pipes.
  • an im Existing mandrel can be arranged inside the pipe to be bent.
  • Bending machines of the above-described training are extremely suitable for bending pipes with a larger diameter. Pipes of larger diameter are often bent with large or larger bending radii. As a result, the freedom of bending that a pipe bending machine should have is not essential. This is also the reason, because with numerically controlled pipe bending machines the question of the freedom of bending so that bent parts of the pipe do not hit the components of the bending machine when bending the pipe are checked and entered into the program. Pipes with a smaller diameter are usually bent with smaller bending radii. This means that during the bending there is a risk that bent pipe parts will strike components of the pipe bending machine. Therefore, the question of freedom from bending is of great importance.
  • the present invention is based on the object of creating a pipe bending machine, in particular for pipes of smaller diameter, which has a large freedom of bending.
  • the center of the axis of rotation of the bending table is arranged in the region of the vertical plane of the side wall of the machine frame, which faces away from the feed carriage, and preferably opposite it to the outside protrudes.
  • the solution according to the invention which can also be expressed in such a way that the bending table is mounted on an extension projecting outwards beyond the vertical side wall, creates a comparatively exposed bending arrangement which results in improved freedom from bending.
  • the bending template be mounted at the head end of a flat beam-shaped support which projects forward in the plane of the top of the machine frame and in its longitudinal extent and a free space is present below this beam-shaped support up to the base of the machine frame .
  • the drive of the bending template be transverse to the longitudinal extension of the machine frame or the bending template supporting beam on the side of the feed carriage or the slide rail.
  • the structural unit have a further drive for the movement of the slide rail in the longitudinal direction of the carrier or tangentially to the bending template.
  • the structural unit is screwed onto the support beam.
  • the drive of the bending template and the drive of the slide rail for their movement in the radial direction of the bending template run parallel to one another.
  • the drive of the bending template consists of a hydraulic motor, on the outgoing shaft of which a worm shaft with a worm wheel is attached, which drives the bending table via a worm gear set surrounding the bending table.
  • the drive of the slide rail in the radial direction of the bending template consists of a hydraulic piston-cylinder arrangement which is arranged above and laterally offset from the hydraulic motor drive of the bending table.
  • the drive of the slide rail in the longitudinal direction of the machine frame consists of a hydraulic piston-cylinder arrangement, which is arranged above the hydraulic motor and extending transversely thereto.
  • the bending table be rotationally symmetrical. As a result, it occupies only a small space.
  • the bending table is arranged in a housing which carries the drive worm and which is screwed onto the side wall of the support beam. This measure not only ensures that the axis of rotation of the bending table is arranged laterally in front of the support beam, but also simple manufacture and assembly is achieved.
  • the bending table be provided at half height with a rotating worm wheel and consist of an outer casing and an inner sleeve, the worm wheel being arranged on the sleeve in the space between the casing and the sleeve.
  • the present invention proposes in connection with the requirement that the bending table be formed as a rotationally symmetrical body to dispense with a clamping jaw previously moved in the radial plane of the bending template and to fix the tube to the bending template in a new way.
  • the sleeve of the bending table is designed in its interior as a cylinder, in which a double-acting piston is axially movable, the piston being provided with a piston rod protruding upward from the cylinder, and the bending template in the middle of it circumferential groove is divided in the horizontal plane into a lower bending template part and an upper bending template part, the lower bending template part being connected to the sleeve and the upper bending template part being connected to the piston rod which can be moved out of the sleeve.
  • the axially acting clamping is particularly advantageously achieved by the proviso that the upper part of the bending template has a collar which projects beyond this circumference and which has a semicircular groove serving as a clamping jaw.
  • This collar particularly advantageously has an extension projecting downwards over the lower half of the bending template.
  • the bending table in its upper region above the level of the beam supporting it be tapered strongly and preferably the lower bending template part also has an adapted cone.
  • FIG. 1 shows a pipe bending machine with the feed carriage 10, which can be moved back and forth on one or more guide rails 11 on the upper side of the machine frame 12.
  • the feed carriage 10 has a tube cylinder 13 with an adapter sleeve 14 in which the tube 15 to be bent is clamped.
  • the tube 15 is guided around a pivotally mounted bending template 16, which has a recess 17 corresponding to the tube radius.
  • the tube is pressed onto the bending template via a clamping jaw 18, the clamping jaw being actuated on a clamping device 19 via a hydraulic cylinder 20.
  • These components are arranged on the swivel arm 21 of the bending table, while the template 16 is arranged axially to the axis of rotation. The rotation takes place in the direction of arrow 22.
  • a slide rail is designated by 23.
  • the machine frame 27 has a protruding stem 28. With 29 the chain case of a template reverse rotation is designated, which also affects the freedom from bending.
  • the bending table 21 is driven by a chain accommodated in the stem 28, which is actuated by two piston-cylinder arrangements 30 and 31 in the machine frame.
  • Figure 2 shows the pipe bending machine according to the invention. Although these have the same basic elements as the machine according to claim 1, such as feed carriage, clamping sleeve, bending table, bending template, slide rail and clamping jaw, other reference numerals should be selected in the following description for the components according to the invention.
  • the machine frame 31 carries a supporting beam 33 which projects far on both sides 32, 32a and has a running rail 34 for the feed carriage 35, which carries the clamping sleeve 36.
  • the clamping sleeve is actuated by a hydraulic motor 37 which is arranged above the clamping sleeve.
  • a rail 38 for the feed carriage 35 Displacement of the clamping sleeve and on the top of the support beam on the rearwardly projecting beam part 39 a rail 40 is provided so that the mandrel rod 41 carrying the mandrel retraction 42 can also be moved transversely to the longitudinal extension of the support beam 33.
  • the bending table 43 which, as will be described in detail later, is of a rotationally symmetrical design and is therefore not provided with a swivel arm, is arranged on the supporting beam part projecting forward.
  • the axis of rotation 44 which may be the center of the physical axis of rotation or the geometric axis of rotation, is present, as can be seen in particular from FIG. 3, in the vicinity of the vertical plane of the vertical side wall 45 of the machine frame or the support beam 33. According to FIG. 3, it stands in front of its vertical plane 45. It can also be shown that the bending table is mounted on an extension 46 projecting beyond the vertical side wall 45.
  • the beam-shaped support 33 is arranged in such a way that there is a free space below this support up to the base of the machine frame.
  • the tube 47 can be bent in such a way that parts of the bent tube can reach under the bending table and also the support beam 33 of the bending table.
  • the slide rail is designated. This is moved in the indicated double arrow direction 49 in the radial direction of the bending template 50 arranged on the bending table 43 by a hydraulic cylinder arrangement 51.
  • a component 52 is provided, which consists of the leg 52a and the leg 52b .
  • Transversely to the drive 51 there is a piston-cylinder arrangement 53 which serves to move the slide rail in the indicated arrow direction 53 ′ and thus in the longitudinal direction of the support beam or tangentially to the bending template, so that the slide rail moves along when the tube is bent.
  • the bending table 43 and thus the bending template 50 is rotated by the hydraulic motor 54 with a worm shaft 55 and the drive worm 56, also shown in FIG. 3 and shown in broken lines.
  • the hydraulic drives 51, 53 and 54 are shown essentially schematically in FIG. 3 and in their spatial arrangement with respect to one another. They form a structural unit 57, 58 which is described in detail below in connection with FIGS. 4 to 7.
  • FIG. 4 shows that the bending table 43 is mounted on a structure 46 which is screwed to the side wall 45 of the beam-like support 33 by means of screws 59 and 60, with the result that the axis of rotation, here the center of the axis of rotation 44, via the side wall 45 projects.
  • the worm wheel is designated, the one with Ordered shaft 55 provided, starts from a hydraulic motor 54 not shown in Figure 4.
  • the piston-cylinder arrangement 51 consisting of the cylinder 51a, the piston 51b and the piston rod 51c, is mounted laterally and in parallel and is fastened to a carrier 52 which, with regard to FIG. 3, has a different spatial arrangement but the same functions has because he moves the slide rail not shown in Figure 4 in the indicated double arrow direction 49 so that the slide rail comes to rest on the pipe to be bent or is removed from it.
  • FIG. 4 shows a rotary encoder 61, which is provided at its lower end with a chain wheel 62, so that the current rotation of the bending table is detected via a chain 63, connected to a chain wheel 64 on the rotationally symmetrical bending table.
  • FIG. 5 shows the hydraulic motor 54, which cannot be seen in detail from FIG. 4, with its outgoing shaft 55, which is connected to the worm shaft 56a of the worm 56 via a bush 65 and associated wedges 66, 66a.
  • the worm shaft 56a is supported in the aforementioned housing 46 which supports the bending table.
  • Figure 5 shows the slide rail 48 which is mounted on the carrier 52b. As can be seen in principle from FIG. 3, this is displaced radially to the bending template 50 in the indicated double arrow direction 49 by the cylinder 51a, the piston rod 51c of which is attached to a fastening 52 is stationary. Since the piston can be hit on both sides, the cylinder wall 51a, which is connected to the slide rail, is displaced.
  • Figure 4 shows the position in which the slide rail has moved up to the pipe to be bent. The movement takes place on a rail 67 shown in FIG. 5.
  • FIG. 6 shows, in the same way as FIG. 4, the rotary encoder 61 with its sprocket 62 arranged below the carrier 45, further the chain 63 and the sprocket 64 present on the bending table.
  • FIG. 7 shows particularly clearly that the bending table 43 is designed as a rotating body. It is mounted in the structure 46 with its end face 46a in two spaced-apart tapered roller bearings 68 and 69.
  • the bending table consists of the sleeve 70, which is at the top by a cover 71 via screws 72 and at the bottom by a
  • Socket 73 is completed with screws 74.
  • the rotating worm wheel 75 is fixed to the sleeve 70, in which the worm 56 of the hydraulic motor 54 engages.
  • the sleeve 70 is designed as a cylinder. It has a piston 76 in its interior which is effective on both sides.
  • the piston has a downwardly projecting piston rod 77, which serves as a guide, and an upwardly projecting piston rod 78, which in its upper region has a step 79 formed by a stepwise reduction in diameter.
  • cylinder spaces 80 and 81 there are two cylinder spaces 80 and 81 in the cylinder, the cylinder space 80 being connected to the inlet 80b via a channel 80a, the cylinder space 81 being connected to the inlet 81b via a channel 81a. If pressure oil is filled in via the inlet 80b, this results in an enlargement of the cylinder space 81 with the lifting of the piston and its piston rod 78.
  • the bending template 82 consists of the upper bending template part 82a and the lower bending template part 82b, with a dividing line in the middle of the groove 83.
  • the upper bending template part 82a also has a step so that the upper bending template part is firmly connected to the piston rod 78 via the screw 85.
  • the lower bending template part 82 is provided with an extension 86 which is strongly conical in its lower region 86a and widens outwards, so that in connection with the likewise conical ring 87 in connection with a wedge 88 and fastening screws 89 a firm, rotation-proof connection in between Bending table and bending template 82 takes place.
  • the ring 82 consists of two halves.
  • This above-described design of the upper half of the bending template serves as a clamping jaw for clamping the tube to the bending template.
  • Figure 11 shows the support beam 33 as a tube with a rectangular cross-section to which the rail 34 is welded. This carries, via a welded-on intermediate rail 93, the welded-on toothed rack 94, in which the drive of the feed carriage engages.
  • Figure 12 shows that the body 46 is attached to the side of the support beam is screwed, which is provided with an angled part 46a and with the bending table 43 and the drives 54, 51, 53 is a structural unit.
  • the support beam 2 has a length of the support beam of 3 to 4 meters and a height of 1 meter.
  • the support beam according to FIGS. 11 and 12 has a width of 15 cm and a height of 10 cm.
  • the running rail 34 is 12 cm wide.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP83106429A 1982-11-04 1983-07-01 Presse à courber des tubes Expired - Lifetime EP0108193B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3240799 1982-11-04
DE19823240799 DE3240799A1 (de) 1982-11-04 1982-11-04 Rohrbiegemaschine

Publications (4)

Publication Number Publication Date
EP0108193A2 true EP0108193A2 (fr) 1984-05-16
EP0108193A3 EP0108193A3 (en) 1984-07-25
EP0108193B1 EP0108193B1 (fr) 1986-12-30
EP0108193B2 EP0108193B2 (fr) 1990-08-16

Family

ID=6177313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106429A Expired - Lifetime EP0108193B2 (fr) 1982-11-04 1983-07-01 Presse à courber des tubes

Country Status (5)

Country Link
US (1) US4563891A (fr)
EP (1) EP0108193B2 (fr)
JP (1) JPS5987929A (fr)
CA (1) CA1206082A (fr)
DE (2) DE3240799A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2615131A1 (fr) * 1987-05-11 1988-11-18 Oscam Spa Machine pour le pliage des ronds ou autres elements metalliques analogues
FR2922127A1 (fr) * 2007-10-15 2009-04-17 Jaubjaub Consulting Sarl Machine a cintrer un profile et outillage de cintrage pour une telle machine
CN103521571A (zh) * 2013-06-20 2014-01-22 张家港市明华机械制造有限公司 一种弯管机
CN107900168A (zh) * 2017-11-06 2018-04-13 佛山市顺德区莱雄机械设备有限公司 左右向共享的一体式数控弯管机
CN110936164A (zh) * 2019-11-07 2020-03-31 苏州嘉翔展示道具有限公司 一种新型金属管体折弯机及其管体折弯加工工艺
CN114798847A (zh) * 2022-06-29 2022-07-29 江苏元贞智能科技有限公司 一种工程施工用金属管材折弯装置

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61255721A (ja) * 1985-05-08 1986-11-13 Ishikawajima Harima Heavy Ind Co Ltd 管の曲げ加工装置
DE3619643C2 (de) * 1985-06-22 1996-01-11 Schwarze Rigobert Rohrbiegemaschine
DE3627502C2 (de) * 1986-08-13 1995-06-14 Schwarze Rigobert Rohrbiegemaschine
AT390215B (de) * 1988-09-09 1990-04-10 Vaillant Gmbh Vorrichtung zum biegen von rohren
DE4129478A1 (de) * 1991-09-05 1993-03-11 Schwarze Rigobert Verfahren zur steuerung einer rohrbiegemaschine
US6192728B1 (en) * 2000-05-30 2001-02-27 Yin Lin Machine Industrial Co., Ltd Pipe bending machine accurately controlling bent angles of pipes
FR2826889B1 (fr) * 2001-07-06 2003-10-03 Silfax Chariot pour machine a cintrer les tubes
US7171834B2 (en) * 2004-04-22 2007-02-06 Robinson Ross G External sleeve assisted tube bending
DE102006054119C5 (de) * 2006-11-15 2009-12-10 Benteler Automobiltechnik Gmbh Biegevorrichtung für Rohre
CN103978073A (zh) * 2014-05-23 2014-08-13 浙江国华家具有限公司 快速制作休闲椅椅腿的折弯机
JP1525574S (fr) * 2014-11-26 2017-05-22
JP1525571S (fr) * 2014-11-26 2017-05-22
JP1527322S (fr) * 2014-11-26 2017-06-05
JP1525573S (fr) * 2014-11-26 2017-05-22
JP1525570S (fr) * 2014-11-26 2017-05-22
CN104858269A (zh) * 2015-04-22 2015-08-26 罗瑞运动用品（昆山）有限公司 一种滑板车圆管弯管机
CN105170737A (zh) * 2015-09-14 2015-12-23 苏州市宝玛数控设备有限公司 一种管路用的数控弯管机
CN105170741A (zh) * 2015-09-23 2015-12-23 苏州华冲精密机械有限公司 一种圆盘式铝型材弯曲机
CN112045088A (zh) * 2020-08-01 2020-12-08 李昌全 灯框自动成型加工装置及灯框加工方法
CN115318893B (zh) * 2022-10-13 2022-12-23 南通腾中机械有限公司 一种数控折弯加工生产装置
CN117019944B (zh) * 2023-10-10 2023-12-08 江苏苏锐制管有限公司 一种不锈钢管加工设备

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DE1527394A1 (de) * 1963-06-14 1969-12-18 Claude Ragache Universalbiegemaschine
DE2001827A1 (de) * 1970-01-16 1971-07-22 Harten Herbert Van Rohrbiegemaschine
DE2133359B2 (de) * 1971-07-05 1973-08-30 Rohrbiegemaschine
DE1627620B2 (de) * 1967-08-03 1974-06-12 H. Schwarze Soehne, Gebr. Schwarze, Peter Wirtz Kg, 5000 Koeln Rohrbiegemaschine
US4063441A (en) * 1975-09-19 1977-12-20 Eaton-Leonard Corporation Apparatus for bending tubes

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US757593A (en) * 1902-07-11 1904-04-19 Western Electric Co Machine for bending tubes.
US2762415A (en) * 1951-12-27 1956-09-11 Imp Brass Mfg Co Tube bending tool
DE1740257U (de) 1956-01-07 1957-02-21 Banning A G Maschinenfabrik J Biegevorrichtung.
US3017917A (en) * 1959-12-10 1962-01-23 Pines Engineering Co Inc Tube bending machine
US3287952A (en) * 1963-04-06 1966-11-29 Hilgers Maschinen Und Appbau A Bending machine
US3276235A (en) * 1963-07-02 1966-10-04 Parker Hannifin Corp Hydraulic tube bending machine
US3336776A (en) * 1964-06-24 1967-08-22 Leonard Prec Products Co Tube-bending apparatus
DE1552984C3 (de) 1966-07-13 1975-01-09 H. Schwarze Soehne, Gebr. Schwarze, Peter Wirtz Kg, 5000 Koeln Rohrbiegemaschine mit einem an einer Vertikalachse schwenkbaren Biegetisch
US3475938A (en) * 1967-05-02 1969-11-04 Foster Wheeler Corp Apparatus for bending
FR2117745A1 (en) * 1970-12-14 1972-07-28 Alsthom Tube bending - by internally heating a small square section of the tube as it is bent
DE2709201A1 (de) 1976-06-03 1977-12-15 Homer L Eaton Verfahren und maschine zum kaltbiegen von insbesondere metallrohren
US4126030A (en) * 1977-10-03 1978-11-21 Eaton-Leonard Corporation Retractable pressure die
DE3033950C2 (de) * 1980-09-10 1985-06-27 Thomas Peter Dipl.-Wirtsch.-Ing. 6120 Michelstadt Lang Rohrbiegemaschine
JPS57193237A (en) * 1981-05-22 1982-11-27 Chiyoda Kogyo Kk Both right and left bending type bender

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1527394A1 (de) * 1963-06-14 1969-12-18 Claude Ragache Universalbiegemaschine
DE1627620B2 (de) * 1967-08-03 1974-06-12 H. Schwarze Soehne, Gebr. Schwarze, Peter Wirtz Kg, 5000 Koeln Rohrbiegemaschine
DE2001827A1 (de) * 1970-01-16 1971-07-22 Harten Herbert Van Rohrbiegemaschine
DE2133359B2 (de) * 1971-07-05 1973-08-30 Rohrbiegemaschine
US4063441A (en) * 1975-09-19 1977-12-20 Eaton-Leonard Corporation Apparatus for bending tubes

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2615131A1 (fr) * 1987-05-11 1988-11-18 Oscam Spa Machine pour le pliage des ronds ou autres elements metalliques analogues
FR2922127A1 (fr) * 2007-10-15 2009-04-17 Jaubjaub Consulting Sarl Machine a cintrer un profile et outillage de cintrage pour une telle machine
WO2009087297A1 (fr) * 2007-10-15 2009-07-16 Jaubjaub Consulting Machine a cintrer un profile selon deux sens de cintrage et outillage de cintrage
US8616036B2 (en) 2007-10-15 2013-12-31 Eaton Leonard Europe Machine for bending a profile in two bending directions and bending tool
CN103521571A (zh) * 2013-06-20 2014-01-22 张家港市明华机械制造有限公司 一种弯管机
CN107900168A (zh) * 2017-11-06 2018-04-13 佛山市顺德区莱雄机械设备有限公司 左右向共享的一体式数控弯管机
CN107900168B (zh) * 2017-11-06 2019-12-06 佛山市顺德区莱雄机械设备有限公司 左右向共享的一体式数控弯管机
CN110936164A (zh) * 2019-11-07 2020-03-31 苏州嘉翔展示道具有限公司 一种新型金属管体折弯机及其管体折弯加工工艺
CN114798847A (zh) * 2022-06-29 2022-07-29 江苏元贞智能科技有限公司 一种工程施工用金属管材折弯装置

Also Published As

Publication number Publication date
DE3240799C2 (fr) 1988-11-17
EP0108193B2 (fr) 1990-08-16
EP0108193B1 (fr) 1986-12-30
JPH0431765B2 (fr) 1992-05-27
DE3240799A1 (de) 1984-05-17
CA1206082A (fr) 1986-06-17
JPS5987929A (ja) 1984-05-21
DE3368539D1 (en) 1987-02-05
US4563891A (en) 1986-01-14
EP0108193A3 (en) 1984-07-25

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