EP0074944A1 - Production de formations dans un materiau traite en continu - Google Patents

Production de formations dans un materiau traite en continu

Info

Publication number
EP0074944A1
EP0074944A1 EP81901306A EP81901306A EP0074944A1 EP 0074944 A1 EP0074944 A1 EP 0074944A1 EP 81901306 A EP81901306 A EP 81901306A EP 81901306 A EP81901306 A EP 81901306A EP 0074944 A1 EP0074944 A1 EP 0074944A1
Authority
EP
European Patent Office
Prior art keywords
sheet material
formations
projections
roll
rows
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.)
Withdrawn
Application number
EP81901306A
Other languages
German (de)
English (en)
Inventor
Stephen Thomas Moseley
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.)
Sections & Profiles (h & E) Ltd
Original Assignee
Sections & Profiles (h & E) Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10520680&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0074944(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sections & Profiles (h & E) Ltd filed Critical Sections & Profiles (h & E) Ltd
Publication of EP0074944A1 publication Critical patent/EP0074944A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • B21D13/04—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by rolling

Definitions

  • the present invention relates to continuous processing of metallic and plastics materials.
  • the material moves continuously, in contra dis ⁇ tinction to intermittently, through a station at which the material is modified in some way, the material being of substantially endless form or of indeterminate length or having a length which is at least many times the largest dimension of the material as measured at right angles to its length.
  • the length of the material is that dimension which extends in the direction of -travel through the station.
  • the modification may, for example, affect the cross-sectional shape or the surface finish of the material.
  • a further aspect of the invention relates to sheet material which can be produced by continuous processing of metallic or plastics materials.
  • sheet material is used herein generically to embrace generally flat metal sheet, strip metal and material of other configurations which can be formed by bending sheet or strip, or has been formed by fabrication from sheet or strip, or has been extruded and includes in its cross- section a part of sheet-like form.
  • O ⁇ PI position but does not significantly increase the strength of the material in relation to a bending load applied by supporting the material at positions spaced apart in a direction transverse to the corrugations and applying a load at an intermediate position.
  • a method of producing forma ⁇ tions which are either strengthening formations or pierc ⁇ ings or a combination of both in continuously processed metallic material and in continuously processed plastics material, the formations being discontinuous longitudi ⁇ nally of the material, wherein the material is acted on by at least one pair of male and female mating components between which the material passes and which are so shaped that they produce said formations in the material, wherein the material is acted on by at least one further device which modifies the material and wherein the material moves past or through the further device and between said mating components continuously and at the same speed.
  • the method of producing formations in accordance with the invention can be used in a cold roll-forming process and in a process which comprises extrusion of plastics or metallic material. Furthermore, the cold roll forming or extrusion can be carried out at a normal speed, the formation of the piercings or strengthening formations being carried out at the same speed.
  • the strengthening formations or piercings are preferably discontinuous in both longitudinal and transverse directions. Such strengthening formations increase the strength of sheet material in both the longitudinal and transverse directions.
  • the further device and the pair of mating components are preferably driven by common driving means.
  • o. y .p either strengthening formations or piercings or a combination of both in continuously processed metallic material and in continuously processed plastics material, the formations being discontinuous longi ⁇ tudinally of the material, wherein the material is passed between a pair of rolls having at their circumferences respective formations which engage opposite surfaces of the sheet material, the rolls are rotated about respective parallel axes, the formations on one roll push the sheet material into gaps between adjacent formations on the other roll and said formations on the rolls have a profile, as viewed along the axes of the rolls, which includes two involute curves arranged symmetrically about a diametral plane of the corresponding roll.
  • metallic or plastics sheet material having on at least one of its faces a plurality of projections, the .projections being arranged in a plurality of rows with a plurality of projections in each row, each projection having been formed by stretching locally initially plain sheet material and deforming the material from its initially plain configuration to provide at an opposite face of the sheet material a depression corresponding to the projection, and the sheet material being character ⁇ ised in that the overall thickness of the sheet material is at least twice the thickness of the material at a position between projections.
  • plain sheet material we mean sheet material having no array of projections.
  • the plain sheet material may be flat or curved, for example uncoiled from a reel of strip metal.
  • Sheet material in accordance with the invention has a strength, as measured by subjecting the material to an increasing bending load until permanent deformation occurs, which is at least 1055 greater than the strength of the plain sheet material from which it is formed and
  • O. PI typically the strength is at least twice as great as that of the plain sheet material from which it is formed.
  • the projections of sheet material in accordance with the invention are preferably formed by a method in accordance with the first aspect of the invention. In a case where the purpose of carrying out the method is to increase the strength of the material, it is preferred that all of the projections are initially imperforate. When the sheet material is used, apertures may be formed through the material to receive screws or other fasteners and to permit other members to extend through the sheet material. It is also within the scope of the invention for the sheet material to be perforated at at least some of the projections.
  • a roll for use in a method in accordance with the second aspect, the roll having on its peripheral surface a plurality of rows of projections, there being a plurality of projections in each row and each projection having a profile, as viewed along the axis of the roll, which includes two involute curves arranged symmetrically about a diametral plane of the roll.
  • FIGURE 1 shows a cross-section through metal sheet material and cylindrical form tools acting on the material
  • FIGURES 2 and 3 show respective ⁇ cross-sections through sheet material and second and third examples of tools acting on the material;
  • FIGURE 4 shows a cross-section similar to Figure 3 but with the tools at a different stage of operation on the material
  • FIGURE 5 shows a fragmentary -perspective view of one example of sheet material having formations formed by the tools of Figure 1 ;
  • FIGURE 6 shows a fragmentary cross-section through the sheet material of Figure 5;
  • FIGURES 7 and 8 illustrate respectively an elevation and a transverse cross-section of a second example of ' sheet material having formations produced by a method in accordance with the invention
  • FIGURES 9 and 10 show respectively an elevation and a transverse cross-section of a third example of sheet material
  • FIGURES 11 and 12 show respectively an elevation and a transverse cross-section of a fourth example of sheet material.
  • FIGURE 13 shows a fragmentary perspective view of sheet material having formations produced by a method in accordance with the invention and being subjected to a bending load.
  • Figure 1 illustrates a method in accordance with the invention of forming projections in sheet material.
  • the initially plain sheet material which may be drawn from a coil of metal strip, is passed between a pair of cylin ⁇ drical form tools 2 and 3 rotatable about respective axes (not shown) which are parallel.
  • the tool 2 has at its periphery rows of projecting teeth, there being in each row a plurality of teeth which are spaced from one another in a direction parallel to the axis of rotation of the tool and there being a plurality of rows spaced apart circumferentially of the tool.
  • Respective teeth of three successive rows are indicated by the reference numerals - , 5, and 6.
  • Each tooth has a profile, as viewed along the axis of the tool, which includes two involute curves 7 and 8 which are arranged symmetrically about a diametral plane 9 of the tool.
  • the tool 3 is adapted for mating with the tool 2 and has at its periphery a nu bei-* of elongated formations, three successive ones of which are indicated by the reference numerals 10, 11 and 12. Each, of these forma ⁇ tions is arranged with its length parallel to the axis of the tool and has the same profile, as viewed along the axis, as do the teeth 4, 5 and 6. Between adjacent formations of the tool 3 are gaps 13 which correspond in size and shape to the gaps 14 between the adjacent teeth 4, 5 and 6.
  • the form tools 2 and 3 are positioned in such a way that they are in mesh with one another and that between enmeshed teeth of the tool 2 and formations of the tool 3, there is maintained a uniform gap.
  • sheet material which approaches the tools is engaged by one formation on the tool 3, represented by the formation 10, and by one tooth on the tool 2, represented by the tooth 14. This formation and tooth engage opposite surfaces of the sheet material.
  • Rotation of the form tools, one clockwise and the other anti-clockwise, around their respective axes, will bring pressure to bear on the sheet material and the resultant effect will be to stretch the sheet material 1 into the desired shape and to fill the uniform gap between opposed and enmeshed teeth and formations.
  • the involute curvature of the teeth and formations on the form tools facilitates ease of entry to and exit from the positions in which the formations and teeth of the form tools are fully engaged with the sheet material. This is an important factor in eliminating slip of the sheet material and the main ⁇ tenance of uniformity of shape of and spacing between successive formations produced on the sheet material.
  • the form tools 2 and 3 preferably have substantially the same length, as measured along their axes.
  • Each of the formations 10, 11 and 12 preferably has a length at least as great as the length of the rows of teeth on the form tool 2.
  • Each of the projections on the tool 3 and •% each of the gaps 13 extends without interruption from a position adjacent to one end of the tool to a position adjacent to the other end thereof.
  • the profile of each of these formations is constant along its length.
  • the radially outermost surfaces of the teeth on the roll 2 and of the formations on the roll 3 may form parts of respective cylindrical surfaces co-axial with the corresponding tool.
  • FIG. 5 and 6 An example of sheet material having formations produced by the form tools illustrated in Figure 1 is illustrated in Figures 5 and 6, from which it will be seen that there are formed on one face of the sheet material a number of rows of projections with projections in adjacent rows being aligned with each other in a direction perpendicular to the length of the rows.
  • the form tools may be arranged to form rows of projections wherein the projections in adjacent rows are aligned with each other in a direction inclined at an angle less than 90°to the length of the rows.
  • the form tools may be arranged to form a single row of projections, each projection being elongated and arranged with its length extending either perpendicular to the length of the row or in a direction inclined at an acute angle to the length of the row.
  • Figures 7 to 12 illustrate three alternative arrangements of single rows of projections in sheet material, the general transverse cross-sectional shape of which is that of a channel.
  • the projections are formed in the base of the channel and extend from the base in a direction towards the interior of the channel.
  • the projections are spaced apart by a distance somewhat greater than the dimension of each projection measured along a channel. Whilst channels having single rows of projections have been illustrated,
  • FIG. 2 there is illustrated an alternative pair of mating form tools 15 and 16.
  • These form tools may be provided with teeth or formations substantially similar to the teeth provided on the form tool 2 or substantially similar to the formations provided on the form tool 3-
  • the form tool 16 is arranged to rotate about an axis 17 in the same manner as the form tool 2.
  • the form tool 15 is arranged for orbital movement about a pair of axes 18 and 19 which are spaced apart in a direction along the path of travel of sheet material between the form tools.
  • the form tools 15 and 16 are arranged with certain parts thereof in mesh with one another and it will be noted that these parts, whilst in engagement with the sheet material, undergo motion which can be resolved into components directed along the path of travel of the sheet material and components directed transversely of the path of travel.
  • the number of teeth or formations of the form tools 15 and 16 which are enmeshed with each other at any moment is smaller than the number of formations and teeth of the form tools shown in Figure 1 which are enmeshed with each other at an -moment. It will be noted that, at the position where the form tool 15 withdraws from engagement with the sheet material, the sheet material is not supported, by the form tool 16.
  • the form tool 15 may be flexible or of articulated construction and is driven at a speed corresponding to that of the form tool 16.
  • FIGs 3 and 4 there is illustrated a method of forming piercings in sheet material 44.
  • the apparatus illustrated in Figure 4 comprises a pair of mating components, namely a punch 42 and a die 43 which are moved in a similar manner to the forming tools 15 and 16 of Figure 2 respectively.
  • the punch 42 includes at least
  • O ⁇ .P ⁇ one row of punch elements 51 which mesh with parts of the die 43 defining recesses 50 into which corresponding parts of the sheet material are punched.
  • the tools illustrated in Figure 4 differ from the tools illustrated in Figure 2 in that the gap between punch elements 51 and the die is not uniform and in that the profile of the elements , 51 is adapted to provide a piercing action, the necessary clearance angles being included.
  • the punch 42 and die 43 are shown in positions such that one punch element 51 ⁇ _ is just leaving a recess in the die and a subsequent punch element 51b , is approaching the sheet material 44.
  • the sheet material is gripped by the punch and die .
  • a leading edge of the punch element 51b_ pierces the sheet material 44.
  • the punch element enters the adjacent recess of the die 43 to a depth slightly greater than the thickness of the sheet material to punch a slug out of the sheet material into the recess of the die.
  • the punch element then withdraws from the recess in the die whilst remaining in the aperture formed in the sheet material until the punch element has moved away from the die.
  • the punch element is then withdrawn from the sheet material without any interference with the die.
  • the sheet material may pass from any of the pairs of forming tools disclosed herein to further forming tools 20, 21 which modify the material in some way, for example by forming the material into a channel-section.
  • the forming tools 15 and 16 and the forming tools 20 and 21 may be driven by common drive means (not shown).
  • the sheet material may be fed from an extrusion die to the forming tools.
  • the sheet material illustrated in Figures 5 and 6 is formed from plain metal strip, for example mild steel or
  • the pitch of the projections within each row is selected according to the thickness of the plain sheet material used to produce the finished sheet material illustrated. Generally, the pitch of the projections, that is the distance between corresponding points on successive projections, within each row will be within the range four to sixteen times the thickness of the initial sheet material.
  • the pitch of the projections measured across the rows would normally lie within the same limits as the pitch measured along the rows but may differ somewhat from the latter pitch. Typically, the pitch measured across the rows is somewhat greater than the pitch measured along the rows.
  • Each of the projections 22 to 25 has a substan ⁇ tially flat crest.
  • substantially flat we mean that the crest appears to be flat on casual inspection.
  • the form of the crest may be such that it can be shown by the use of instruments to be curved.
  • the crest will generally be slightly convex.
  • the crests 26 to 29 of the projections 22 to 25 are at least approximately parallel to a reference plane which touches each of these crests.
  • Each of the crests 26 to 29 has the same size and shape and is substantially rectangular.
  • the dimension of the crest 26 measured in a direction along the row of projections 22, 23 is at least
  • the dimension of the crest 26 measured in a direction perpendicular to the length of the row is at least one tenth the pitch of the projections across the rows but is within the range 75? - 130? of the pitch measured along the rows.
  • Each of the projections 22 to 25 has curved sides which merge with the sheet material between adjacent projections.
  • the sides are generally inclined to the reference plane which touches the crests 'of the projec ⁇ tions.
  • sides 30 and 31 of the projection 26 which face towards adjacent rows are inclined more gently than are the other sides of the projection 26, one of which other sides is indicated at 32, which face towards adjacent projections in the same row.
  • there are substantially flat areas 33 and 34 of the sheet material are between the projection 26 and adjacent projections in the same row. These substantially flat areas extend across all of the rows of projections but contribute not more than one third of the superficial area of the sheet material.
  • the areas 33 and 34 contribute approximately one quarter of the superficial area of the material.
  • the smaller dimension of ,each of the substantially flat areas 33 and 34, that is the dimension measured along the length of the rows of projections, is no greater than one half the pitch of the projections as measured along the rows.
  • the corre ⁇ sponding projections in each of the rows are aligned with each other in a direction perpendicular to the length of the rows.
  • the projections in one row may be offset in a direction along the row with respect to the projections in an adjacent row.
  • the overall thickness of the sheet material by which is meant the separation between the reference plane which touches the crests 26 to 29 and a face of the sheet
  • O.ViPI material remote from that plane is at least twice the • maximum thickness of the metal comprised by the sheet material. This maximum thickness occurs between projec ⁇ tions, particularly at positions mid-way between adjacent projections.
  • the metal in the sides of the projections for example the sides 30, 31 and 32, is slightly thinner in consequence of having been stretched during the formation of the projections.
  • the thickness of the metal at the crests 26 to 29 also may be somewhat less than the maximum thickness of the metal.
  • the overall thickness of the sheet material is increased sufficiently to increase the strength by at least 10%. A greater increase in strength results from increasing the overall thickness two-fold and the preferred overall thickness is approximately three and one half times the thickness of the initial plain sheet.
  • each projection is imperforate. Certain projections may be perforated subsequently by fasteners when the sheet material is used.
  • the action of the pair of forming tools 2 and 3 and the pair of forming tools 15 and 16 illustrated in Figures 1 and 2 results in local stretching of the sheet material with consequent local reduction in the thickness of the material.
  • This stretching partly compensates for the contraction of the sheet material which would other ⁇ wise occur during formation of the projections so that the length of the sheet material issuing from the forming tools is not less than 75% of the length of the initial piece of plain sheet material.
  • the length of the formed sheet material will be not less than 90% of the length of the initial plain sheet material and preferably the length of the resulting sheet material is .not less than 95% of the length of the initial piece of sheet material.
  • the tooth ⁇ > is shown in a position where the centre of the tooth lies on a diameter common to the tools 2 and 3. This tooth has pushed the part of the sheet material with which it is engaged to the maximum displacement of that part of the sheet material relative to adjacent parts of the sheet material. It will be seen that the separation between the tooth t. and the adjacent formations 11 and 12 of the tool 3 is, when the rolls are in the position illustrated in Figure 3, substantially equal to the thickness of the metal forming the sides of the projection.
  • the separation between the tooth 4 and the formation 12 and the separation between the tooth 6 and the formation 11 also are substantially equal to the thickness of the metal forming the sides of the projections so that the metal is gripped between the tooth 4 and formation 12 at a position to the rear of the tooth 5 and is also gripped by the tooth 6 and formation 11 at a position in advance of the tooth 5. Gripping of the sheet material at these positions prevents sliding of the sheet material relative to the teeth of the tools towards the tooth 6 and results in stretching of the sheet material around the tooth 6 to form the projection.
  • the sheet material lying between adjacent rows of teeth on the tool 2 also opposes longitudinal contraction of the sheet material during formation of the projections.
  • the sheet material being reduced significantly.
  • the mass of metal required for a particular duty is less when the metal is in the form illustrated in Figures 5 and 6 than when the metal is in the form of plain sheet material.
  • the width of the sheet material, that is the dimension extending parallel to the axes of the tools 2 and 3 » is not significantly changed by the rolling process.
  • FIG 13 there is illustrated an elongated piece of sheet material having a transverse cross- sectional shape which is that of a channel.
  • a number of strengthening formations 35 to 38.
  • Each of these formations comprises a projection directed towards the. interior of the channel and a corresponding recess facing outwardly of the channel. If the channel rests by one of its flanges 54 on supports 55 and 56 spaced apart longitudinally of the channel and the channel is subjected at its opposite flange 53 to a downwardly directed force supplied at a position between the supports 55 and 56, the force which . would be necessary to cause non-elastic deflection of the base 52 of the channel would be considerably greater than the force required to cause deflection of the base of a similar channel not having the formations 35 to 38 under similar circumstances.
  • the method o the present invention enables initially, plain and flat sheet material to be processed continuously between a number of pairs of cold forming rolls to provide the projections 35 to 38 and to form the channel-section, the material moving between the rolls of each successive pair at the same speed and without any interruption. All of the rolls can be driven by the same drive means, thus avoiding the need to provide a separate drive means for forming tools which form the projections 35 to 38.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Seal Device For Vehicle (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

On fait passer une feuille metallique entre une paire de rouleaux de formage a froid qui forment une pluralite de projections sur une face de la feuille. Ces projections raidissent la feuille. Un rouleau possede une pluralite de rangees de dents (4, 5, 6) et l'autre rouleau possede plusieurs formations correspondantes (10, 11, 12) ayant chacune une longueur egale a la longueur d'une rangee de dents. En regardant le long des axes des rouleaux, les dents et les formations ont un profil qui comprend deux courbes de developpantes.
EP81901306A 1981-03-26 1981-06-01 Production de formations dans un materiau traite en continu Withdrawn EP0074944A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8109518 1981-03-26
GB8109518A GB2095595B (en) 1981-03-26 1981-03-26 Sheet material and method of producing formations in continuously processed material

Publications (1)

Publication Number Publication Date
EP0074944A1 true EP0074944A1 (fr) 1983-03-30

Family

ID=10520680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81901306A Withdrawn EP0074944A1 (fr) 1981-03-26 1981-06-01 Production de formations dans un materiau traite en continu

Country Status (10)

Country Link
EP (1) EP0074944A1 (fr)
BE (1) BE889112A (fr)
DK (1) DK525782A (fr)
ES (1) ES8300524A1 (fr)
FI (1) FI811729L (fr)
GB (1) GB2095595B (fr)
GR (1) GR75686B (fr)
IT (1) IT1137083B (fr)
NO (1) NO823948L (fr)
WO (1) WO1982003347A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9711184B2 (en) 1999-03-01 2017-07-18 Koninklijke Philips N.V. Method of storing a real time stream of information signals on a disc like record carrier

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
ES2156715B1 (es) * 1999-03-11 2002-02-16 Maicas Juan Jose Bayo Sistema de embuticion y corte discontinuos en superficies planas de chapas metalicas.
FR2802596B3 (fr) 1999-12-17 2001-10-26 Lorraine Laminage Poutre creuse d'absorption d'energie de choc
DE102006021556A1 (de) 2006-05-08 2007-07-26 Richter-System Gmbh & Co Kg Befestigungselement für Bauelemente des Trockenbaus und ein Verfahren zur Herstellung eines solchen Befestigungselements
GB2450765B (en) 2007-11-13 2009-05-20 Hadley Ind Holdings Ltd Sheet material
CA2672065C (fr) 2007-11-13 2015-11-17 Hadley Industries Overseas Holdings Limited Tole de materiau lamine a froid, et procede et outil pour sa fabrication
CA2950219C (fr) 2016-05-11 2020-02-11 Ispan Systems Lp Montant d'acier de coffrage de beton et systeme
JP6680226B2 (ja) * 2017-01-20 2020-04-15 株式会社デンソー フィン、フィンを備えた熱交換器、及びフィンの製造方法

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US2328441A (en) * 1942-10-09 1943-08-31 Herbert C Fischer Structural member
US2441476A (en) * 1944-08-10 1948-05-11 Glenn L Martin Co Reinforced structural sheet
US2878553A (en) * 1954-06-25 1959-03-24 Homer C Hirsch Rigidized electrolytically formed metal sheets
FR869217A (fr) * 1956-11-26 1942-01-27 C H Weisbach Kommanditgesellsc Dispositif d'introduction des lisières des tissus dans les machines à tendre et àsécher avec fronçage préalable
US3217845A (en) * 1961-02-06 1965-11-16 Crown Zellerbach Corp Rigidified corrugated structure
GB1174233A (en) * 1966-02-01 1969-12-17 Redman Heenan Internat Ltd Apparatus and Process for Continual Stretch Forming
DE1602522C3 (de) * 1967-03-04 1975-04-03 Peter 5670 Opladen Orth Jun. Vorrichtung zum Walzen von mit Querrippen versehenen Blechen
DE1962222U (de) * 1967-04-18 1967-06-15 Mannesmann Ag Welltafel aus metall.
GB1359993A (en) * 1970-09-07 1974-07-17 Ass Eng Ltd Corrugation-forming machines
FR2289265A1 (fr) * 1974-10-31 1976-05-28 Est Profiles Tubes Procede et dispositif pour le raidissement en continu d'un element metallique et element metallique ainsi obtenu
SE416624B (sv) * 1976-09-13 1981-01-26 Plannja Ab Forfarande och anordning for att profilera ett band av elastoplastiskt material

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9711184B2 (en) 1999-03-01 2017-07-18 Koninklijke Philips N.V. Method of storing a real time stream of information signals on a disc like record carrier

Also Published As

Publication number Publication date
IT1137083B (it) 1986-09-03
NO823948L (no) 1982-11-24
FI811729L (fi) 1982-09-27
ES502935A0 (es) 1982-11-01
IT8122234A0 (it) 1981-06-10
DK525782A (da) 1982-11-25
GR75686B (fr) 1984-08-02
GB2095595B (en) 1985-10-02
WO1982003347A1 (fr) 1982-10-14
BE889112A (fr) 1981-10-01
ES8300524A1 (es) 1982-11-01
GB2095595A (en) 1982-10-06

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