EP0107747B1 - Procédé de fabrication de tubes cylindriques en céramique présentant des empreintes localisées et dispositif de mise en oeuvre de ce procédé - Google Patents

Procédé de fabrication de tubes cylindriques en céramique présentant des empreintes localisées et dispositif de mise en oeuvre de ce procédé Download PDF

Info

Publication number
EP0107747B1
EP0107747B1 EP82401268A EP82401268A EP0107747B1 EP 0107747 B1 EP0107747 B1 EP 0107747B1 EP 82401268 A EP82401268 A EP 82401268A EP 82401268 A EP82401268 A EP 82401268A EP 0107747 B1 EP0107747 B1 EP 0107747B1
Authority
EP
European Patent Office
Prior art keywords
tube
tube portions
rollers
tools
tool
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.)
Expired
Application number
EP82401268A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0107747A1 (fr
Inventor
Jean Batigne
Claude Deslandes
Jacques Gillot
Paul Tritten
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Priority to DE8282401268T priority Critical patent/DE3276570D1/de
Publication of EP0107747A1 publication Critical patent/EP0107747A1/fr
Application granted granted Critical
Publication of EP0107747B1 publication Critical patent/EP0107747B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/92—Methods or apparatus for treating or reshaping
    • B28B21/98—Methods or apparatus for treating or reshaping for reshaping, e.g. by means of reshape moulds

Definitions

  • the present invention relates to a method for manufacturing cylindrical ceramic tubes having imprints located on their internal face and a device for implementing this method, as well as tubes provided with said imprints and obtained by said method.
  • the invention further relates to devices for making localized impressions.
  • the present invention relates to a method of producing cylindrical tubes of permeable ceramics having on their internal face localized reliefs, such as annular, helical impressions or single helices or crossed double helices or even point impressions.
  • Document FR-A-2 073 777 discloses a method of manufacturing pipes, the internal face of which has a helical projection, a process which consists in placing a pipe between two plates, one of which carries a projection in the form of a linear edge. oblique to the edge of the plate, and which slide in opposite directions.
  • Document FR-A-759 777 discloses a method of manufacturing metal pipes, the periphery of which comprises helical folds, a method which consists in clamping a pipe in a tool provided with rollers having a grooved profile, the tool being placed rotation around the pipe.
  • Document FR-A-1 150 246 discloses an apparatus for manufacturing tubes having a constriction, this apparatus comprising a die of which one end comprises a core in the form of a neck movable from front to rear, as well as a diaphragm which opens or closes in synchronism with the displacement of the nucleus.
  • one of the techniques for separating a mixture of gases having similar molecular masses is gas diffusion.
  • the gas mixture is circulated under pressure inside tubes formed by a microporous wall.
  • These tubes consist, on the one hand, of a macroporous ceramic tube, generally called support, internally coated with a microporous layer deposited on this internal wall.
  • the assembly constituted by the tube itself or "support and the microporous layer makes it possible to adapt the total porosity of the coated tube or" barrier in order to obtain an optimal gas separation coefficient.
  • This technique is in particular used for the separation between two gases corresponding to different isotopes of the same simple body.
  • the invention relates exclusively to the production of the support, that is to say the production of the macroporous tube.
  • such cylindrical tubes are produced by the usual ceramic methods, that is to say by mixing ceramic oxides, thermally removable organic binders and a liquid phase (more generally water ).
  • the mixture is in the form of a plastic and deformable paste and formed into a tubular shape using a piston press or a screw extruder.
  • the dough is placed in the press cylinder and forced under pressure through an annular space determined by an external nozzle and an internal punch, which define the external and internal diameters of the tube to be produced.
  • the tube is then placed on rollers which rotate and advance in a dryer whose temperature allows the elimination of the liquid phase and leads to a non-deformable, solid tube capable of being handled or transported automatically towards the other materials which will make it undergo the following operations of pre-cooking (elimination of organic binders) and actual cooking at high temperature which gives the tube the desired properties (for example: permeability, pore dimensions) and high mechanical resistance and, possibly transport to other material processing equipment.
  • pre-cooking laminate of organic binders
  • actual cooking at high temperature which gives the tube the desired properties (for example: permeability, pore dimensions) and high mechanical resistance and, possibly transport to other material processing equipment.
  • the element At the outlet of the shaping machines (die or screw extruder) the element is in the form of a deformable plastic tube but relatively resistant to elongation and tearing.
  • the subject of the present invention is a process for producing impressions on the internal wall of portions of a tube which is obtained by continuous forming of a paste based on ceramic and cutting of this tube, characterized in that immediately after having formed these portions of tubes which are still deformable, they are placed on drive rollers whose axes are parallel to each other and in the same horizontal plane, and which are driven by rotations around their axes, the axes of revolution of the tube portions being parallel to the axes of the rollers, and pressure means are applied to at least a portion of the tube portions so that these tube portions are sandwiched between the rollers and the pressure means, the pressure means and / or the rollers being provided with at least one impression-making tool, each tool having a main printing direction which is not confused with the direction of the axes of revolution of said tube portions , and in this that a relative movement is created between the tube portions and each tool so that there is substantially no slippage between the tube portions and each tool.
  • the method of manufacturing cavity tubes according to the invention is based on the fact that at the outlet of the tube forming assembly, these are placed on rotary rollers ensuring a rotation of the tubes and advancing towards the dryer and that the roller turns without sliding on a real or fictitious fixed surface.
  • a tool placed on the tubes it supports is also fixed. It is then possible to make imprints on the tubes which are still deformable by applying to them an absolutely fixed tool which will locally deform the tube and will make permanent imprints on the internal face of the tube, these imprints being of shape and profile determined by the tools. and the relative movement mode of the tubes and tools.
  • the rotation rollers include relief imprints and a horizontal plate is applied to the tubes to be deformed in order to exert a certain pressure of the tubes on the relief imprints of the rollers.
  • This process makes it possible to make annular impressions.
  • an economical process which allows many possibilities consists in threading elastomer O-rings on the rollers.
  • all the rollers of the drying assembly are equipped with toroids or raised imprints. It is more economical to equip a roller element which receives the tubes at the outlet of the shaping. On this section, pressure is applied to the tubes which are then transferred to the smooth rollers of the dryer itself.
  • the tubes are deposited on perfectly cylindrical rollers and which can in this case be the rollers of the dryer itself and tools are applied to these tubes, the arrangement and profile of which allow the desired impressions to be made.
  • This tool can be a corrugated plate or a tool formed from rods or tubes fixed to a panel. If these rods or tubes are arranged perpendicular to the axis of the tubes to be formed, the impression produced is annular.
  • This tool can also be constituted by continuous rods or tubes or by series of discontinuous tubes arranged in staggered rows so as to reduce the load distributed over the tube, this load tending to decrease its diameter so as to apply more localized pressure.
  • This tool can also consist of rods or tubes inclined with respect to the axis of the tubes to be marked.
  • the imprint is a helical groove.
  • the tool can consist of a single section to obtain a continuous helical mark over the entire length of the tube or of several tubes in order to produce tubes having marked zones alternating with zones which remain smooth.
  • the longitudinal profile of the latter comprises on the outlet side of the tubes a gently sloping area where the nipping of the tube between the impression tools and the tube progression rollers and therefore its ovalization gradually decrease until it cancels. More precisely, over the entire length of the rods or tubes or more generally of the impression-forming tools, the rolling of the tube to be marked which is pinched between the tools and the rollers causes it to undergo a "rolling ovalization" which is characterized by the succession of profiles shown in FIG. 17.
  • the present invention also relates to two improved embodiments of the invention, which make it possible to avoid or at least reduce this introduction of constraints during the formation of imprints on the tube.
  • fingerprinting tools are used which are heated. This allows the regions of the tube to be deformed to be heated by contact and selectively.
  • the thermal conductivity of the ceramic pastes being low, the zone heated by the impression forming tools extends to the entire thickness of the tube if this thickness is not too high but its width remains small, this is that is, the regions of the tube which do not come into contact with the impression-forming rods remain cold.
  • the regions of the tube which are not to be deformed remain relatively rigid.
  • the heating of the fingerprinting tools can be obtained by various means which will be described later.
  • a second improved embodiment of the process which is the subject of the invention consists in the use of tools for forming fingerprints subjected to vibrations.
  • the use of these vibrating tools has the following advantages.
  • Vibration of the impression-forming tools can be carried out by any appropriate means, for example by means of an electromagnet supplied by an alternating current or by means of an eccentric rotating mass rotated by a motor. fixed to the chassis which supports the impression-forming tools or by any other vibrating device disposed on this chassis.
  • the vibration can be exerted parallel or perpendicular to the axis of the tubes to be formed or in several directions at the same time (for example rotary vibration).
  • the invention also relates to the various devices for implementing the method according to its different variants.
  • the invention also relates to the porous and permeable ceramic tube provided with the various forms of imprints which can be produced by implementing the method of the invention according to its various variants. Mention may in particular be made of annular fingerprints, helical fingerprints, localized or point fingerprints.
  • Figures 6a and 6b show a second device for implementing the same method according to a variant.
  • the impressions are no longer made using a tool applying pressure on the tubes driven by the rollers but by tools which are provided directly on the rollers. drive, the force applied by these tools being obtained by a piece for holding the tubes relative to the rollers.
  • FIGS. 6a and 6b there is a carpet of rollers 6 ′ which, as best seen in FIG.
  • the rollers realize the rotation of the tubes 12 on the one hand and, on the other hand, they are subjected to a general translational movement along the arrow F (perpendicular to the axis of the tubes 12).
  • a pressure plate 14 associated for example with a spring device 16 ensures the immobilization in a vertical direction of the tubes 12 relative to the rollers 6' provided with the tools 6 ".
  • These tools 6 which are cylindrical crowns can either be machined from the mass of the rollers 6, or be attached in the form of rings constituted by O-rings.
  • FIGs 6'a and 6'b there is illustrated a device for a third embodiment of the method which somehow combines the embodiments of Figures 5 and 6.
  • a third roller 108 said anneler can be lowered to apply pressure on the tube 12 to be deformed and this roller 108 has reliefs 110 (visible in FIG. 6'b) which make it possible to make impressions 112 of annular shape.
  • the roller 108 can also rotate around its axis XX ′, thus obtaining a minimum of slippage and friction between the tube to be deformed 12 and the annealing roller 108.
  • FIGs 6 "a and 6" b there is shown a variant of the device for the third embodiment of the method, object of the invention.
  • the roller 108 carries reliefs 110, but also the two drive rollers.
  • each imprint in the tube is formed simultaneously by the action of the reliefs of the three rollers.
  • the device of Figure 7 is close to that shown in Figure 5, that is to say that we find the rollers 6 but instead of finding a single tool 8 we find, as in Figure 6 , a pressure plate 14 associated with an elastic device 16 and on the underside of which are mounted impression-making tools 18. As can best be seen in FIG. 7b, these tools have for example a rounded active face 18a for make groove-shaped impressions. Of course, on this device we could have tools with different shapes to achieve an adequate shape fingerprints on the tubes 12.
  • Figure 8 shows a bottom view of a pressure plate 14 on which are mounted tools 20 for making annular impressions. These tools are the entire width of the pressure plate and can have, in a plane of section perpendicular to their length, a shape adapted to the section of the impression to be produced.
  • FIG 9 there is shown a tool in which there are three pressure plates integral with each other, referenced 14a, 14b and 14c, each plate carrying tools for making impressions 22.
  • the tools make a fingerprint out of three.
  • the tools 22 of the same plate are offset by a length equal to 3p and a tool of a plate is offset d 'a length p of the tool of the adjacent tray.
  • Figure 10 shows a bottom view of a pressure plate 14 provided with impression-making tools 24 which are inclined relative to the axis of displacement of the tubes. These tools 24 make it possible to make helical impressions with a pitch p '.
  • FIG 11 there is shown a plate 14 of the same type which is provided with tools 24 'allowing the production of propellers in the opposite direction.
  • the plate 14 in bottom view of FIG. 12 is provided with localized punches 26 which thus make it possible to make point impressions on the tubes.
  • FIG 13 the installation is shown in more detail.
  • This comprises on the one hand a loading station 30 which makes it possible to place the tubes to be formed at the outlet of the tube forming die on the rollers 6.
  • a loading station 30 which makes it possible to place the tubes to be formed at the outlet of the tube forming die on the rollers 6.
  • These are driven in translation and in rotation by the assembly a belt device 32 driven in rotation by end wheels 34a and 34b which ensure the tension and the rotational drive of this carpet.
  • the device also comprises a pressure plate 14 carrying tools 36 and a station for unloading the tubes provided with their imprint 38.
  • FIG 14 there is shown another form of tool for obtaining sets of helical imprints.
  • the whole of the plate and the tools can be produced using a ribbed sheet 40 which is associated with spring pressure means 42. This makes it possible, for example, to obtain impressions with relatively large radii of curvature.
  • This tool is arranged in height so that the marker tubes sink about 2 mm into the ceramic tubes.
  • the tubes or rollers are coated with a film of purely organic oil before the working area.
  • the tubes After drying and heat treatment, the tubes have annular impressions of the desired size and the process used is perfectly continuous and industrial.
  • Each ringed zone is thus separated from its neighbor by a smooth reserve of approximately 30 mm.
  • the tubes leaving the spinning press are arranged as in Example 1 on the rotary rollers advancing towards the dryer.
  • a tool consisting of a perfectly flat plate on the lower surface of which are fixed tubes of 7 mm outside diameter: two tubes of 220 mm in length on the side of the plate and two rods 660 mm in length on the central parts of the tray.
  • These four tubes are inclined by about 15 ° relative to the axis of the tubes to be marked and are parallel to each other. Each tube marks its helix in the corresponding zone, the shorter tools leading to the shorter zones.
  • the marker tubes are brought to 70-80 ° C by circulation of oil heated by a thermostatic device in a closed circuit. The increase in local temperature allows a slight softening of the tube which becomes more deformable.
  • the tubes produced After this operation, drying and heat treatment, the tubes produced have well marked helical imprints according to the desired geometric arrangement.
  • Each propeller is marked, for example, by five cylindrical tools of diameter 8, 10, 12, 14 and 16 mm, perfectly parallel and whose spacing has been carefully calculated so that each tool falls precisely back into the mark produced by the punch preceding it.
  • the marker plate consists of a hollow parallelepiped frame in which the heating fluid can be circulated.
  • One side of this frame is perfectly flat and four marking tools are attached to it.
  • These tools consist of plates in which bars 8, 10, 12, 14 and 16 mm in diameter have been machined, each bar being offset from the previous one, of a length corresponding to one revolution (or a circumference) of the tube to be marked, the offset being measured in the direction of movement.
  • the propellers obtained are wide and deep and the tube has not undergone an exaggerated elongation which would have reduced its diameter in the intermediate cylindrical parts.
  • the heating tool 50 has a first region I, the heating tool 50 has in cross section the shape shown in the figure. 16a, that is to say that the tool 50 only provides heating without any mechanical deformation.
  • region II the tool 50 provides progressive mechanical deformation, as shown in Figures 16b and 16c.
  • the tool 50 of course also provides heating.
  • zone III the profile decreases in thickness, as shown in FIG. 17b and this zone constitutes a clearance zone.
  • the heating of the part by the heating tools can cause harmful volatilization of certain constituents of the dough with which the tubes are made.
  • the tube can also be coated beforehand with a film of non-volatile compounds such as, for example, a paraffin oil.
  • these regions can be coated with a film of non-volatile liquid.
  • this liquid can be deposited on the active face of the tools, from where it will be transferred to the tube thanks to the contact which takes place during the impression forming operation.
  • impression-making tools can also be subjected to vibrations, these two characteristics being able to be combined.
  • Vibration of the impression-making tools can be carried out by any suitable means. Mention may in particular be made of an electromagnet supplied by an alternating current associated with a magnetic piece integral with the plate carrying the tools for making impressions. One can also use an eccentric rotating mass rotated by a motor fixed on the plate which carries the tools. More. generally, any vibrating device fixed to the tool support plate can thus be used. The vibration can be exerted parallel or perpendicular to the axis of the tubes to be deformed or in several directions at the same time, for example by rotary vibrations.
  • n ° 2 and n ° 4 there is a rotary vibration around a horizontal axis perpendicular to the axis of the tube, with a frequency of 120 Hz and a peak-to-peak amplitude of 0.2 mm.
  • the height of the projections obtained on the inside of the tubes is as follows:
  • the tubes showed no cracks after drying and sintering.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
EP82401268A 1978-11-27 1982-07-06 Procédé de fabrication de tubes cylindriques en céramique présentant des empreintes localisées et dispositif de mise en oeuvre de ce procédé Expired EP0107747B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8282401268T DE3276570D1 (en) 1982-07-06 1982-07-06 Method of making cylindrical ceramic tubes with localized impressions, and apparatus for carrying out this method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7833445A FR2503615B1 (fr) 1978-11-27 1978-11-27 Procede de fabrication de tubes cylindriques en ceramique presentant des empreintes localisees et dispositif de mise en oeuvre de ce procede

Publications (2)

Publication Number Publication Date
EP0107747A1 EP0107747A1 (fr) 1984-05-09
EP0107747B1 true EP0107747B1 (fr) 1987-06-16

Family

ID=9215397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401268A Expired EP0107747B1 (fr) 1978-11-27 1982-07-06 Procédé de fabrication de tubes cylindriques en céramique présentant des empreintes localisées et dispositif de mise en oeuvre de ce procédé

Country Status (6)

Country Link
US (1) US4541976A (it)
EP (1) EP0107747B1 (it)
AU (1) AU554368B2 (it)
BE (1) BE880039A (it)
FR (1) FR2503615B1 (it)
IT (1) IT1119518B (it)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2503615B1 (fr) * 1978-11-27 1985-10-11 Commissariat Energie Atomique Procede de fabrication de tubes cylindriques en ceramique presentant des empreintes localisees et dispositif de mise en oeuvre de ce procede
JPH02142732U (it) * 1989-05-01 1990-12-04
DE3915428A1 (de) * 1989-05-11 1990-11-15 Hoechst Ceram Tec Ag Aluminiumoxidrohre und verfahren zu ihrer herstellung
US4989505A (en) * 1989-08-29 1991-02-05 Oscar Mayer Foods Corporation Apparatus for forming casingless sausage and the like
US5141762A (en) * 1989-08-29 1992-08-25 Oscar Mayer Foods Corporation Apparatus and method for forming casingless sausage and the like
USRE35426E (en) * 1989-08-29 1997-01-21 Oscar Mayer Foods Corporation Forming casingless sausage and the like
US5115732A (en) * 1989-08-29 1992-05-26 Oscar Mayer Foods Corporation Apparatus and method for forming casingless sausage and the like
US5056425A (en) * 1989-08-29 1991-10-15 Oscar Mayer Foods Corporation Forming casingless sausage and the like
WO1996034221A1 (en) * 1995-04-28 1996-10-31 Moody D L Jr Formed ragglestick
KR100466803B1 (ko) * 2002-08-31 2005-01-24 주식회사 에코프로 구형입자의 연속 제조방법
CA2567936C (en) 2006-11-14 2016-01-05 Atomic Energy Of Canada Limited Device and method for surface replication
CZ305938B6 (cs) * 2012-10-10 2016-05-11 Milan KubĂ­n Tvářecí zařízení
FR3024663B1 (fr) * 2014-08-11 2020-05-08 Technologies Avancees Et Membranes Industrielles Nouvelles geometries d'elements tubulaires monocanaux de separation par flux tangentiel integrant des promoteurs de turbulences et procede de fabrication
FR3024664B1 (fr) * 2014-08-11 2020-05-08 Technologies Avancees Et Membranes Industrielles Nouvelles geometries d'elements tubulaires multicanaux de separation par flux tangentiel integrant des promoteurs de turbulences et procede de fabrication
FR3024665B1 (fr) * 2014-08-11 2020-05-08 Technologies Avancees Et Membranes Industrielles Element de separation par flux tangentiel integrant des obstacles a la circulation et procede de fabrication
EP3542692A1 (de) * 2018-03-22 2019-09-25 HILTI Aktiengesellschaft Staubsaugerschlauch

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR759777A (fr) * 1933-08-18 1934-02-09 Procédé et dispositif pour la fabrication de tuyaux flexibles
FR1150246A (fr) * 1955-05-27 1958-01-09 Perfectionnements apportés aux appareils pour la fabrication de corps tubulaires présentant un rétreint
JPS498793B1 (it) * 1969-12-15 1974-02-28
FR2503615B1 (fr) * 1978-11-27 1985-10-11 Commissariat Energie Atomique Procede de fabrication de tubes cylindriques en ceramique presentant des empreintes localisees et dispositif de mise en oeuvre de ce procede
US4324540A (en) * 1980-07-11 1982-04-13 Brown & Williamson Tobacco Corporation Apparatus for making grooves in tobacco smoke filters

Also Published As

Publication number Publication date
FR2503615B1 (fr) 1985-10-11
AU8533282A (en) 1984-01-05
EP0107747A1 (fr) 1984-05-09
IT7969265A0 (it) 1979-11-22
IT1119518B (it) 1986-03-10
US4541976A (en) 1985-09-17
FR2503615A1 (fr) 1982-10-15
BE880039A (fr) 1983-07-15
AU554368B2 (en) 1986-08-21

Similar Documents

Publication Publication Date Title
EP0107747B1 (fr) Procédé de fabrication de tubes cylindriques en céramique présentant des empreintes localisées et dispositif de mise en oeuvre de ce procédé
FR2806347A1 (fr) Procede et systeme de moulage d'un materiau sandwich thermoplastique et article embouti ainsi produit
EP0532812A1 (fr) Procédé d'obtention de traits ou de contours en creux sur une feuille ou pièce tubulaire en matière plastique ou métalloplastique et son utilisation dans la fabrication d'un tube souple
CH510473A (fr) Elément d'échange de chaleur et procédé pour sa fabrication
FR2596121A1 (fr) Anneau de friction pour embrayages ou freins et procede et dispositif pour le fabriquer
FR2495508A1 (fr) Procede pour fabriquer des poulies par roulage a partir d'une feuille metallique et poulies ainsi obtenues
EP0231677B1 (fr) Procédé et dispositif d'emboutissage de matériaux en feuille, à faible allongement
FR2526706A1 (fr) Appareil pour fabriquer des gaines tubulaires en matiere plastique destinees a etre appliquees a des recipients
FR2647377A1 (fr) Procede et installation de coulee de produits metalliques minces a reduction d'epaisseur sous la lingotiere
FR2778354A1 (fr) Procede et dispositif de faconnage d'une soudure sur un manchon support
FR2503616A1 (fr) Procede et dispositif de formation d'empreintes sur des tubes en ceramique
WO1990006841A1 (fr) Procede de production de panneaux en continu et machine pour sa mise en ×uvre
FR2500849A1 (fr) Dispositif de refroidissement rapide de tubes metalliques
EP0407323A1 (fr) Procédé et dispositif de coulée continue entre cylindres de produits métalliques minces aptes au laminage à froid direct
LU83240A1 (fr) Machine de soudage de feuilles thermoplastiques enroulees
FR2498006A1 (fr) Procede de fabrication de cylindres pour anodes de tubes electroniques
CH512946A (fr) Procédé pour former une bague à partir d'une ébauche annulaire et appareil pour la mise en oeuvre de ce procédé
EP0097750A2 (fr) Procédé et dispositif de formation d'empreintes sur des tubes en céramique
CH338299A (fr) Procédé et appareil pour la fabrication continue d'une pièce tubulaire
EP1173298B1 (fr) Procede et outils d'emboutissage et applications notamment a l'emboutissage de banquettes
LU84605A1 (fr) Procede et appareil en vue de controler la largeur et l'epais seur d'un feuillard
FR2792231A1 (fr) Materiau de garnissage
FR2630755A1 (fr) Matiere pour coussins elastiques, coussins elastiques fabriques avec celle-ci ainsi qu'installation pour la fabrication de matiere pour coussins elastiques
FR2555937A1 (fr) Materiau stratifie, procede de fabrication d'un materiau stratifie et installation pour la mise en oeuvre de ce procede
FR2588201A1 (fr) Procede, installation et train de laminage pour la fabrication de tubes sans soudure

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE GB LI NL SE

17P Request for examination filed

Effective date: 19841016

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE GB LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19870630

REF Corresponds to:

Ref document number: 3276570

Country of ref document: DE

Date of ref document: 19870723

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19870731

Ref country code: CH

Effective date: 19870731

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: COMMISSARIAT A L'ENERGIE ATOMIQUE

NLT2 Nl: modifications (of names), taken from the european patent patent bulletin

Owner name: COMMISSARIAT A L'ENERGIE ATOMIQUE TE PARIJS, FRANK

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19910731

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920629

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920701

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19930201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19930706

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930706

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940401