EP0037096A2 - Dispositif travaillant comme une poinçonneuse ou une presse - Google Patents

Dispositif travaillant comme une poinçonneuse ou une presse Download PDF

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Publication number
EP0037096A2
EP0037096A2 EP81102326A EP81102326A EP0037096A2 EP 0037096 A2 EP0037096 A2 EP 0037096A2 EP 81102326 A EP81102326 A EP 81102326A EP 81102326 A EP81102326 A EP 81102326A EP 0037096 A2 EP0037096 A2 EP 0037096A2
Authority
EP
European Patent Office
Prior art keywords
machine part
movement
wedge body
movable machine
hard
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
EP81102326A
Other languages
German (de)
English (en)
Other versions
EP0037096A3 (en
EP0037096B1 (fr
Inventor
Jürgen Schulz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT81102326T priority Critical patent/ATE7769T1/de
Publication of EP0037096A2 publication Critical patent/EP0037096A2/fr
Publication of EP0037096A3 publication Critical patent/EP0037096A3/de
Application granted granted Critical
Publication of EP0037096B1 publication Critical patent/EP0037096B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/40—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by wedge means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/14—Crank and pin means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/16—Cam means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/525—Operation controlled by detector means responsive to work
    • Y10T83/538—Positioning of tool controlled
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8696—Means to change datum plane of tool or tool presser stroke
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8841—Tool driver movable relative to tool support
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8841—Tool driver movable relative to tool support
    • Y10T83/8843—Cam or eccentric revolving about fixed axis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8867—With means to adjust tool position on tool holder

Definitions

  • the invention relates to a device in the manner of a punch or press, in particular for punching out flat objects from sheet or sheet material, primarily in the manufacture of adhesive labels, with a base or the like., A stationary machine part and one relative thereto Working movement of a linearly movable machine part, at least one of which is equipped with a tool, in particular a cutting tool.
  • the object of the invention is to overcome existing shortcomings, disadvantages and difficulties and the like as a punch, press or the like. to create a suitable device with which high accuracy requirements with regard to the work process can be met in a convenient and relatively simple manner.
  • the invention also strives for an advantageous design of the device in detail and in the elements belonging to it. Further problems with which the invention is concerned arise from the respective explanation of the indicated solution.
  • the invention is characterized by the features specified in claim 1.
  • the movement surfaces are formed from the hard body surfaces to be explained in terms of their details and their structure, it is possible to provide a movable one to provide wedge bodies for generating the working movement.
  • the H-style body surfaces can be prepared with such an accuracy and flatness, thereby also a high working accuracy is thus achieved in cooperation with the wedge body has a high precision of the device and.
  • the hard body surfaces can slide directly onto one another.
  • rolling element arrangements are advantageously provided between the movement surfaces, in particular in the embodiment as a needle bearing or the like. with appropriate plastic cages, as are known per se, so that there is no sliding friction.
  • the wedge body and / or the movable machine part can even be made of aluminum or a light metal alloy, which has the advantage that the size of the masses to be moved is reduced.
  • the invention provides that the tool is also fastened to the part carrying it on a hard body surface and / or that the machine part opposite the tool is also formed by a hard body surface. This continues to increase the accuracy of the device and its operation.
  • a cam mechanism can advantageously be provided for the back and forth movement of the wedge body, e.g. an eccentric drive.
  • An adjusting device is advantageously assigned to the movable machine part. This can be designed particularly expediently so that the movable machine part can be displaced parallel to the direction of movement of the wedge body for its precise adjustment and is thereby adjusted in the direction of the working movement.
  • an eccentric drive can be used for adjustment.
  • the device shown in FIGS. 1 and 2 has a base 1, a head part 3 firmly connected to it by means of a series of screw bolts 2 or corresponding rigid connecting elements, and a head part 3 up and down relative to the latter in the direction of arrow P1 in FIG. 1 movable machine part 4.
  • the latter therefore executes a movement as is required to carry out a pressing, cutting, punching or punching process.
  • the device is particularly suitable for punching out parts from an intermittently moving web, designated overall by the number 5, whereby it can in particular be a combined web, in which there is a self-adhesive layer on a carrier and an upper layer of paper or plastic used to form labels or similar elements thereon.
  • the die cut should only cut through the web used to form the labels and, if necessary, the adhesive layer, but not the backing web. This requires extremely precise operation of the device.
  • a wedge body 6 is used which can be moved back and forth in the direction of arrow P2 (FIG. 1) by means of a drive by a given and preferably adjustable path.
  • This wedge body 6 is supported with a horizontal underside on the base 1 and causes with its upper inclined surface the vertical movement of the provided on its underside with a corresponding inclined surface Part 4.
  • a cam drive is provided for the movement of the wedge body 6, which has two curves 8, for example eccentrics, which can be rotated in the same direction about the axes 7, the circumferential surfaces of which bear on sliders 9 on the wedge body 6.
  • Tension springs 10 or other suitable elements are used to ensure a permanent, fixed system when the curves 8 circulate.
  • the curves 8 are driven together by a motor, not shown, which is located in the pedestal and expediently its speed can be changed or controlled.
  • an adjusting device 11 which has two eccentrics 12, which have precise bores in projections 13 of the movable part 4 are included.
  • the movable part 4 is displaced horizontally by a corresponding amount relative to the wedge body 6, the base being simultaneously lowered or raised as a result of the inclined surfaces. This setting is very sensitive because of the translation given by the sloping surfaces.
  • the common rotation of the eccentrics 12 can be carried out by a threaded spindle 15 to be rotated by means of the handwheel 14 and mounted in the base of the device, on which sit two nuts 16 on which levers 17 connected to the eccentrics 12 are connected in an articulated manner.
  • the surfaces referred to as moving surfaces, ie the top of the base 1 in the area of the wedge body 6, the bottom and top of the wedge body 6 and the inclined underside of the movable part 4 are formed by hard body surfaces F, between which rolling element arrangements 18 are provided, in particular needle bearings or other roller bearings suitable for linear movements.
  • the hard body surfaces F themselves are designed according to the invention as illustrated in FIGS. 3 to 6. 3 and 4 are in a hardened investment material 22, e.g. an epoxy resin or a polyester resin, possibly with the addition of bronze or steel powder, balls. 21 of the same shape and size, which have a hardness of e.g. 65 to 68 Rockwell C. It. can be ball bearing balls. These balls are ground to a part of their height after the investment has hardened, so that a large number of mutually adjacent end faces 23 (FIG. 4) result, which together form the hard surface F of the element E.
  • a hardened investment material 22 e.g. an epoxy resin or a polyester resin, possibly with the addition of bronze or steel powder
  • balls. 21 of the same shape and size, which have a hardness of e.g. 65 to 68 Rockwell C. It. can be ball bearing balls.
  • These balls are ground to a part of their height after the investment has hardened, so that a large number of mutually adjacent end faces 23 (FIG
  • An element E of the type explained can e.g. be fixed to the aforementioned parts of the device by gluing or also by clamping or in another suitable manner.
  • hard surfaces F on parts 4 and 6 can be bnw. 1 and 3 can also be produced directly on this.
  • Fig. 6 as a section through the top of the wedge body 6 along the central plane of embedded balls, it can be seen that the balls 21 are supported on the bottom 24 of a recess in the wedge body 6 and are surrounded by an investment compound 22. After the latter has hardened, the balls have been removed from the original height H (diameter) to the final height h by grinding or another machining process. As a result, the hard surface F results from the large number of individual end faces 23 of these ablated balls 21. the intervening areas of the investment that still appear on the top are small. This is exaggerated in FIG. 4 for better illustration.
  • the processed height H - h can be in particular in the range from 25% to 50%.
  • the part carrying the tool here the fixed head part 3 is equipped with a hard body surface F of the type described, so that the clamping or fastening of the tool, for example a steel strip cutting tool 19, with high accuracy is possible.
  • the part opposite the tool here the movable part 4 is also advantageously formed on its side facing the tool by a hard body surface F.
  • a pad made of copper, brass or the like can be used when performing a punching process. be arranged.
  • the wedge body 6 Due to the arrangement of the ear body surfaces F, it is otherwise not necessary to use certain parts of the device for example, to form the wedge body 6 from a material of increased hardness or strength. Rather, the wedge body and / or the movable part can also consist of a non-ferrous material, primarily a light material such as aluminum or aluminum alloy. This also means that the mass forces when working can be reduced.
  • the device shown in FIGS. 1 and 2 is equipped with a quick adjustment device 30 for the movable machine part 4.
  • a quick adjustment device 30 for the movable machine part 4 This makes it possible to lower the movable machine part 4 regardless of its setting or adjustment for the working process by such an amount that, when the wedge body 6 moves back and forth, the machine part 4 still moving up and down in the upper one upon a command The turning point of his working movement is so deep that the material web 5 is no longer punched or cut by the tool 19.
  • This can be advantageous in several cases, for example when an end of a web 5 or the like with the beginning of a new web by gluing. is connected, while there is double the thickness by the overlapping of the web parts, which may result in that not only an upper specific example for labels layer of the web is cut at this point, but rägerlagen also one of the T.
  • the quick adjustment device can be formed in various ways. There are all the designs within the scope of the invention with which the described effect can be achieved, in particular by moving the movable machine part 4 parallel to the direction of the arrow P2.
  • a device that is independent of an adjusting device or one that is combined with the latter can be provided. This is shown in the exemplary embodiment.
  • the threaded spindle 15 of the adjusting device 11 can be displaced with the nuts 16 in the axial direction by a sufficient amount, for example with the aid of a pressure medium cylinder 31, the piston rod 32 of the piston 33 displaceable therein being coupled to the threaded spindle 15 via a connection permitting the rotation of the latter is.
  • the piston 33 or the like by a stop. precisely defined end position, whereby the setting and exact working position of the movable machine part 4 effected by means of the handwheel 14 is ensured.
  • the piston 33 can be held in this position by the action of pressure medium or by a strong spring 34.
  • the piston 33 can be extended over its entire stroke or only a part thereof by supplying a pressure medium to the cylinder 31 via a valve 35, whereby it moves the threaded spindle 15.
  • Characterized the eccentric 12 are rotated via the lever 17 so that the movable machine part 4 a displacement in the Learns size in Fig. 1 to the left that when the wedge body 6 is moved back and forth it is only raised so far vertically that the tool 19 can no longer cut the web 5.
  • the valve 35 can be actuated manually at the desired point in time, further also by means of a program or, in particular, depending on the response of a sensor 36 (FIG. 1) which scans the web 5 and which, for example, is capable of temporarily thickening the web can be detected and otherwise formed in a manner known to those skilled in the art.
  • the number 37 in FIG. 2 denotes a control device which, upon signals supplied by the sensor 36 via a line 38, causes the valve to be actuated.
  • valve 35 can in particular also be actuated with a delay caused by a timing element in the control device 37, which is just selected so that the movable machine part 4 is adjusted by means of the device 30 to suppress a cutting process when the relevant one Location of the intermittently moving web is located under the tool 19.
  • a timing element in the control device 37 which is just selected so that the movable machine part 4 is adjusted by means of the device 30 to suppress a cutting process when the relevant one Location of the intermittently moving web is located under the tool 19.
  • the part 4 can immediately follow through the device 30 be reset so that the next working stroke is carried out normally. Accordingly, the suppression of the cutting process is possible for several strokes if necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Press Drives And Press Lines (AREA)
  • Sliding-Contact Bearings (AREA)
  • Earth Drilling (AREA)
EP81102326A 1980-03-31 1981-03-27 Dispositif travaillant comme une poinçonneuse ou une presse Expired EP0037096B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81102326T ATE7769T1 (de) 1980-03-31 1981-03-27 Vorrichtung nach art einer stanze oder presse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3012486 1980-03-31
DE3012486A DE3012486C2 (de) 1980-03-31 1980-03-31 Vorrichtung nach Art einer Stanze oder Presse

Publications (3)

Publication Number Publication Date
EP0037096A2 true EP0037096A2 (fr) 1981-10-07
EP0037096A3 EP0037096A3 (en) 1982-03-17
EP0037096B1 EP0037096B1 (fr) 1984-06-06

Family

ID=6098894

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81102326A Expired EP0037096B1 (fr) 1980-03-31 1981-03-27 Dispositif travaillant comme une poinçonneuse ou une presse

Country Status (7)

Country Link
US (1) US4462291A (fr)
EP (1) EP0037096B1 (fr)
JP (1) JPS56152600A (fr)
AT (1) ATE7769T1 (fr)
CH (1) CH651494A5 (fr)
DE (2) DE3012486C2 (fr)
DK (1) DK150265C (fr)

Cited By (2)

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FR2566317A1 (fr) * 1984-06-22 1985-12-27 Inoplast Sa Outillage pour la realisation de pieces en matiere synthetique par le procede de moulage par compression-transfert
EP1970173A1 (fr) * 2007-03-16 2008-09-17 Heidelberger Druckmaschinen AG Presse de découpage et de cannelage

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DE3044083C2 (de) * 1980-11-24 1990-05-10 Bobst S.A., Lausanne Stanzeinrichtungen für Stanzautomaten zum Stanzen von Bögen aus Papier, Pappe u. dgl.
EP0482436A3 (en) * 1990-10-25 1993-03-10 Westinghouse Electric Corporation Automated cure press closure system and method
DE9016176U1 (de) * 1990-11-28 1991-02-28 Drössert Maschinenbau GmbH, 4030 Ratingen Schließrahmen für einen Stanztiegel
US5255587A (en) * 1992-05-08 1993-10-26 Eichenberg Robert J Sheet cutting die press
US5913956A (en) * 1995-06-07 1999-06-22 Capps; David F. Apparatus and method for progressive fracture of work pieces in mechanical presses
SG64937A1 (en) * 1996-06-21 2000-08-22 Advanced Systems Automation Wedge device for linear force amplification in a press
US5807455A (en) * 1996-07-23 1998-09-15 International Business Machines Corporation System and method for uniform product compressibility in a high throughput uniaxial lamination press
SG65615A1 (en) * 1996-07-25 1999-06-22 Advanced Systems Automation Pt Bga moulding assembly for encapsulating bga substrates of varying thickness
US5964134A (en) * 1997-06-11 1999-10-12 Arends; Albert W. Trim apparatus and method for trimming an article from a thermoplastic sheet
TW586732U (en) * 2003-06-27 2004-05-01 Hon Hai Prec Ind Co Ltd A press machine for mounting a frame of heat sink to a motherboard
CN2761435Y (zh) * 2004-07-16 2006-03-01 邓业清 图案裁剪器
CN100371178C (zh) * 2004-07-16 2008-02-27 邓业清 图案裁剪器的制备方法
CN2748294Y (zh) * 2004-10-28 2005-12-28 邓业清 可形成立体浮雕图案的图案裁剪器
CN1318195C (zh) * 2005-01-20 2007-05-30 邓业清 摇柄滚压式裁纸机
US7743700B2 (en) * 2006-01-30 2010-06-29 Provo Craft and Novelry, Inc. Roller die press
USD547339S1 (en) 2006-01-30 2007-07-24 Provo Craft And Novelty, Inc. Roller die press
USD547340S1 (en) 2006-01-30 2007-07-24 Provo Craft And Novelty, Inc. Roller die press
USD540834S1 (en) 2006-01-30 2007-04-17 Provo Craft And Novelty, Inc. Roller die press
DE102006047378A1 (de) * 2006-10-06 2008-04-10 Robert Bosch Gmbh Ultraschallschweißvorrichtung sowie Verpackungsmaschine mit Ultraschallschweißvorrichtung
DE102007012639A1 (de) * 2007-03-16 2008-09-18 Heidelberger Druckmaschinen Ag Bogenstanz- und prägemaschine
US8522680B2 (en) * 2008-10-07 2013-09-03 Faye Angevine Apparatus for forming embossed and printed images
JP2010131785A (ja) * 2008-12-02 2010-06-17 Fujifilm Corp インクジェット記録方法
DE102010009033A1 (de) * 2010-02-24 2011-08-25 Haff & Schneider GmbH & Co OHG, 87484 Vorrichtung zur Stanzbearbeitung von flächigen Substraten
USD636414S1 (en) * 2010-06-18 2011-04-19 Janome Sewing Machine Company Limited Pressing machine
US8789461B2 (en) 2011-01-03 2014-07-29 Bai Win Mercantile Corp (H.K.) Ltd. Double-sided paper embossing apparatus
DE102012109434A1 (de) 2012-10-04 2014-04-24 Groz-Beckert Kg Verfahren und Werkzeugeinheit zur Einstellung eines Stanzspalts
US20150378126A1 (en) * 2013-06-12 2015-12-31 Ripley Tools, Llc Mid-span buffer shaving tool
WO2019049233A1 (fr) * 2017-09-06 2019-03-14 ホリゾン・インターナショナル株式会社 Machine de coupe
CN108890741B (zh) * 2018-07-25 2023-08-29 盐城市裕正精密机械有限公司 一种摆臂式裁断机的收料装置
US11534998B2 (en) * 2021-02-15 2022-12-27 Sebright Products, Inc. Baling assembly with a support structure
CN218849547U (zh) * 2022-11-22 2023-04-11 无锡先导智能装备股份有限公司 电芯整形装置及卷绕机
CN116748378A (zh) * 2023-07-10 2023-09-15 深圳市长盈精密技术股份有限公司 一种金属极板的冲孔修边模具及方法

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2566317A1 (fr) * 1984-06-22 1985-12-27 Inoplast Sa Outillage pour la realisation de pieces en matiere synthetique par le procede de moulage par compression-transfert
EP1970173A1 (fr) * 2007-03-16 2008-09-17 Heidelberger Druckmaschinen AG Presse de découpage et de cannelage

Also Published As

Publication number Publication date
DE3012486A1 (de) 1981-10-08
EP0037096A3 (en) 1982-03-17
DE3163953D1 (en) 1984-07-12
DK140081A (da) 1981-10-01
DK150265B (da) 1987-01-26
ATE7769T1 (de) 1984-06-15
DE3012486C2 (de) 1985-04-18
DK150265C (da) 1987-11-30
JPS56152600A (en) 1981-11-26
US4462291A (en) 1984-07-31
CH651494A5 (de) 1985-09-30
JPH0160400B2 (fr) 1989-12-22
EP0037096B1 (fr) 1984-06-06

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