EP0071273A1 - Procédé de fabrication d'un tuyau flexible boudiné, et tuyau flexible boudiné - Google Patents

Procédé de fabrication d'un tuyau flexible boudiné, et tuyau flexible boudiné Download PDF

Info

Publication number
EP0071273A1
EP0071273A1 EP82106873A EP82106873A EP0071273A1 EP 0071273 A1 EP0071273 A1 EP 0071273A1 EP 82106873 A EP82106873 A EP 82106873A EP 82106873 A EP82106873 A EP 82106873A EP 0071273 A1 EP0071273 A1 EP 0071273A1
Authority
EP
European Patent Office
Prior art keywords
strip
fold
hose
band
turn
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
EP82106873A
Other languages
German (de)
English (en)
Other versions
EP0071273B1 (fr
Inventor
Friedrich Bürcher
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
Priority claimed from DE19813130323 external-priority patent/DE3130323A1/de
Priority claimed from DE19823204244 external-priority patent/DE3204244A1/de
Application filed by Individual filed Critical Individual
Priority to AT82106873T priority Critical patent/ATE16361T1/de
Publication of EP0071273A1 publication Critical patent/EP0071273A1/fr
Application granted granted Critical
Publication of EP0071273B1 publication Critical patent/EP0071273B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/121—Making tubes or metal hoses with helically arranged seams with non-welded and non-soldered seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/124—Making tubes or metal hoses with helically arranged seams the tubes having a special shape, e.g. with corrugated wall, flexible tubes

Definitions

  • the invention relates to a method according to the preamble of claim 1 or to a coiled hose according to the preamble of claim 8.
  • Such hoses which are generally manufactured with cross-sectional areas on the order of 50 to 100 cm 2 , are used for permanent installation in buildings, machines or vehicles as air, exhaust air or exhaust gas ducts.
  • a large number of requirements are placed on these hoses, in particular they should be cheap, that is to say simple to manufacture, but at the same time they should be tensile, reasonably flexible in order to avoid special deflection pieces, and in many cases they should also be flame-retardant or even non-flammable.
  • the hose should be light in weight and easy to lay.
  • metal as the hose material.
  • metal for example, aluminum flat channels are known, which consist of aluminum sheet, which is folded into a rectangular tube and provided with a longitudinal seam seam.
  • Such a rigid pipe is fundamentally inferior to hoses in that it is supplied in certain lengths, causes complex transportation, is difficult and difficult to install with different tools, and the storage of various duct parts such as pipe pieces, deflection pieces, transition pieces from round to flat channels etc. required.
  • Rigoform tubes which consist of coiled and corrugated aluminum sheet, the corrugations of which extend in the longitudinal direction of the coiled strips and overlap one another in the edge region, as a result of which the cohesion between adjacent coils is established.
  • the corrugations can be stretched or compressed to a certain extent, which enables the laying of curves.
  • the corresponding pipes are still relatively stiff and a strong pull or a strong overdelanation of the outside of the curve can lead to loosening of the not very tensile connection between adjacent turns.
  • the invention has for its object to provide a simultaneously tensile, flexible, easily transportable and relocatable and if necessary with appropriate material design flame retardant or non-combustible hose.
  • the object is achieved by the invention characterized in claim 1, which can be carried out in particular according to claims 2 or 6.
  • the interlocking folds which in themselves can be of any design - for example, bottle-shaped in cross-section or labyrinthine - have a - seen in cross-section - compressed neck area, which closes the fold volume, in which, as a blocking body, slipping out prevents the fold of the inner strip material from the fold of the outer strip material, in turn a folded structure is arranged.
  • a folding structure forms a blocking body a much larger obstacle that cannot emerge from a small expansion of the neck.
  • the fold of the connecting band has been inserted into the fold, for example in the form of a U-profile, and then together with the edges with the Fold has been squeezed. If the strip material forming the outer fold is a very flexible material, the fold can also be held together from the outside by a band which is curved in the shape of a bow.
  • a corresponding method of hose production can, however, with material which is only slightly stretchable and easily torn, lead to the difficulty that the production of the fold in the free edge of the end turn of the piece of hose already produced pulls the strip material of this end turn back from the direction of this piece of hose , from where, however, it cannot be easily withdrawn in the case of processing stations lying successively along the helical line, since it is held there by these processing stations. There is therefore a risk of cracks.
  • the actual strip material of the turns is no longer withdrawn after the formation of the turn and any shapes such as beads in the edge area are formed beforehand when the strip is fed in, so that no tension occurs in the longitudinal direction of the tube on the strip material during the formation of the hose .
  • the pressure of the five-fold stratification must be very strong in order to produce a material cohesion approximating to a pressure welding, it seems preferable, according to claim 3, to make the edges of the strip material on both sides thicker than the remaining surface of the strip material Unfold form so that the material of the neighboring Windun a certain form-fitting hold to each other.
  • the strip consists of a slightly tearing material, the measure according to claim 4 may be appropriate, which enables the strip to be installed by rotation in the helix without its free edge being subject to the risk of tearing and fraying.
  • the edge area on which the connecting strip is drawn can also be bordered beforehand with a hem tape.
  • the method according to the invention is particularly suitable for the production of aluminum hoses in which tensile stress in the material is avoided as far as possible in view of the low tensile strength of the film material.
  • Tinplate foils and copper foils can also be used as metal foils for the production of completely non-flammable hoses.
  • the method according to the invention can also be advantageously used in the processing of plastic, in particular flame-retardant plastic, and laminated metal foil.
  • the initially circular cross section of the hose produced can be permanently deformed, e.g. to a rectangular shape as a flat channel or to a connector that is round on the one hand and rectangular on the other. The corresponding bending of the material does not require a great deal of force and can possibly also be carried out at the construction site.
  • Fig. 1 shows the production of a coiled hose from a single strip to be coiled from a semi-rigid material, for example from 40 mm wide and 0.1 or 0.2 mm thick pure aluminum foil strip made of anodized aluminum, and a connecting strip made of hard aluminum with a width of 15 mm and a thickness of 0.2 to 0.5 mm.
  • a tube made from these materials without the use of other means such as adhesive tape or the like is completely non-flammable and is at the same time flexible to a certain extent, since in the event of a bend the film can fold up in the bend in the bend.
  • the number of folds is not very high, but such hoses, for example with a diameter of 10 cm, are generally installed once, making the necessary bends, and then remain in this position for the rest of their use.
  • Pure aluminum foil of 0.1 or 0.2 mm thickness fulfills these requirements for flexibility with simultaneous bending stiffness, which is necessary for the cohesion of the adjacent turns.
  • other metal foils of comparable stiffness and flexibility can also be used for the production of non-combustible hoses and comparable plastic foils can also be used for the production of hoses, the flammability of which does not matter.
  • a corresponding metal foil strip 1 is fed in accordance with a direction of movement 2 to a helical guide of known type (not shown in detail) which deflects the strip 1 onto a circular path with a longitudinal component, that is to say a helical path.
  • edge beads 4 of the strip 1 are formed in an edge bead station 3 by turning the edge over on both sides.
  • the edge bead station shown consists of a number of pressure rollers, some of which are driven rollers and some of which are rollers.
  • the strip 1 runs between two guide rollers 5, of which only the upper one is visible, while at its edges two pressure rollers 6 which set up these edges engage with their conical end face.
  • Subsequent pressure rollers 7 press the folded hems down onto strip 1 again.
  • the strip 1 is connected to an already produced piece of hose 8, which consists of the previous length of the strip 1, which is already wound into a spiral rotating in the direction of an arrow 9, with the aid of a connecting band 10.
  • the strip 1 After leaving the edge bead station 3, the strip 1 is supplied with the connecting band 10, in the example described in a plane perpendicular to the plane of the strip 1.
  • This connecting band 10 first runs through a roughening station 11 and is then folded in a folding station 12 around one of the edges of the strip 1, in the example described around that edge which, when the strip 1 is later connected to the already existing piece of hose 8, form its first free end becomes.
  • the folding takes place in the case described game so that about a third of the connecting band 10 is on the underside, while the double width, namely two thirds of the width of the connecting band 10 run along the top of the metal foil strip 1, on which the bead 4 was also folded.
  • the folding leg arranged on the underside is designated by 13, the one running on the top is designated overall by 14.
  • the folding station 12 in turn already divides the folding leg 14 into two halves 15 and 16, of which the folding leg half 16 is bent slightly outwardly so that it can be gripped more easily in a later station.
  • the arrangement of the various pressure rollers which form the folding station 12 is not difficult for the person skilled in the art after the folding program has been presented.
  • the station 12 is shown in the course of the supply of the strip 1 to the tube piece 8, but it could also lie on the free front edge thereof. Likewise, if the function is essentially the same, it is possible for the station to engage on the opposite edge of the strip 1 and / or for the width ratio of the folding legs 13 and 14 to be reversed.
  • the strip 1 is now connected to the already existing hose section 8 as the foremost turn, in that the edge of the strip 1 not shown with the connecting strip 10, shown on the right in the strip 1 in FIG. 1, with a certain overlap area on the inside to the previously free edge the last turn of the strip 1 in the tube piece 8.
  • This edge is the one that has been folded over a certain length beforehand with the connecting strip 10, the folding leg half 16 projecting inwards.
  • the kink between the folding leg halves 15 and 16 abruptly represents the limit of the overlap between the strip material of the successive turns.
  • the tangential approach and inner application of the material of the following strip 1 takes place according to FIG. 1 at a location 17 hidden by the upper tube wall.
  • the folding leg half 16 is folded around the edge of the strip that has laid itself in the angle between the folding leg halves 15 and 16 and the stratification thus created becomes 13-1.4-15-1.4-16 over a wide area or pressed together along lines.
  • a line pressure can ensure that the edge beads 4 are not completely rolled flat, but that the connecting band 10 presses sufficiently firmly on the material of the strip 1 to give a firm connection between the successive turns.
  • the folding station 12 is compared to the embodiment of FIG. 1 on the opposite edge of the strip 1, this is applied to the last turn so that its free edge is in the angle between the folding leg halves 15 and 16 on the incoming strip sets.
  • This can be particularly advantageous if the intended overlap is relatively large and thus the folding leg 16 is wide, since in this case the station 19 can be provided immediately at the point 17 where the strip 1 enters the tube rotation and it does so in terms of inside or outside protruding folding leg half 16 are no difficulties that can arise in the circular arrangement due to tensile or compressive stresses in this leg due to the changed diameter compared to the hose jacket surface.
  • station 19 only a distance far after the winding overlap has been established.
  • this station 19 is also expediently arranged directly at the meeting point 17 even with the connecting band 10 running around the end of the hose section.
  • Fig. 2 shows successive processing steps in the manufacture of the hose.
  • a stage a the strip 1 and the connecting band 10 are still immediately in the state in which they were unwound from the respective supply spools.
  • stage b the strip 1 is already provided with edge beads 4 and the connecting band 11 is already in the state of Folding, whereby the crease between the folding legs 13 and 14 is already visible.
  • Stage c shows the folding leg 14 again divided into its folding leg halves 15 and 16 by a kink.
  • stage d the free edge of the incoming strip 1 or the end turn of the tube piece 8 already produced is placed on the folding leg half 15, and in stage e the folding leg half 16 is again folded down onto this edge of the strip 1.
  • FIG. 3 shows a schematic representation of the connection location of adjacent turns in a representation similar to FIG. 2e, wherein arrows 21 also indicate pressing directions.
  • the strips 1 are not provided with edge beads 4, the pressure according to the arrows 21 must be very strong here in order to achieve a firm connection of the materials.
  • the edge beads 4 are present.
  • the pressing (arrows 21) takes place along a line parallel to the edge beads, as a result of which the cross-sectionally approximately S-shaped configuration of the connecting band 10 has a compressed strip in the central region, the thickness of which is practically the sum of the thicknesses of the material layers.
  • Fig. 5 shows another form of edge processing of the strip 1. This is a bending of the edge or a flanging. When pressing in the region of this bend or flanging, the effect is that the bent edge of the strip 1 hooks onto the connecting band 10.
  • FIG. 7 shows the closing station 19 in a schematic cross section for the case of a hose constructed from two flexible strips, in which an inner spiral and an outer spiral alternate.
  • the station 19 extends over two pressing points at a distance of one spiral step, the below Using rollers, the helical connecting lines between the strip material of successive turns are pressed in two steps, the first of which essentially folds the folded leg half 16 and the second presses along two lines.
  • the seam band 25 is a thin film strip, which is first brought up in a plane perpendicular to the feed plane of the strip 1 and is bent around the edge of the strip 1.
  • the edge of the stripe is well protected and does not tend to fray, even if the thin metal foil tears easily.
  • the material is thus in seven layers, since in addition to the five layers described earlier, the two layers formed by the U-legs of the hem band 25 are added.
  • the opposite edge could also be hemmed in an analog manner before the connecting strip is put on, in particular if the connecting strip is only applied after a certain circumferential angle in the screw region.
  • the strip material is guided through a plurality of guides arranged in a circle in order to carry out its concentricity.
  • the piece of hose 8 runs on a guide bed in the direction of an arrow 22 in accordance with the production speed and later becomes a rectangular cross section by pressure rollers 23, of which a pair or several pairs with axes are arranged tangentially to the piece of hose 8 in two mutually perpendicular directions pressed to be usable for a fire-proof flat duct ventilation system.
  • the pressure rollers 23 can also act on the hose in a separate operation after the hose produced has been separated from the helical guide according to FIG. 1, in order to avoid constructional difficulties resulting from the rotation of the hose result in its longitudinal axis during its winding. If the tube produced is pushed only a little way through the pairs of pressure rollers 23, a transition piece is created between the round and flat channels.
  • the hose produced can also be perforated on the side and changed with a throat, creating a branch piece.
  • the materials described for the aluminum foil strip and the aluminum connecting band can be knurled out and expanded like a homogeneous film tube wall without great difficulty.
  • the metal foil strip 1 is fed in the direction of movement 2 of the helical guide, which likewise deflects the strip 1 onto a circular path with a longitudinal component, that is to say a helical path.
  • rollers 33 press two channel-like folds 34, which protrude as webs on the outside of the strip, along the edges in strip 1.
  • the winding guide pushes the fold of the trailing edge of the preceding turn into Fold of the leading edge of the subsequent turn, so that the turns overlap with an edge area in which the webs or folds on both sides interlock. This is indicated in Fig. 1 at an engagement point 34 '.
  • the rollers 33 can be heated rollers which bring about a permanent change in shape.
  • the connecting band is a U-profile connecting band 35, which is bent to the U-profile in a preliminary station and is inserted into the fold of the two strip windings.
  • the interlocking groove-like folds 34 with the Connecting tape 35 are now pressed together at a compression station 36 by pressing rollers 37, which press the folds 34 in the direction of the arrow, along the edge of their breaking out from the surface of the strip 1, so that an approximately bottle-like web cross section is produced, which is shown in the drawing is shown schematically triangular.
  • the folds 34 are thus redesigned into a connecting structure line 38 which runs in a helical shape around the hose and holds the individual turns of the hose coil together.
  • FIG. 12 schematically shows the stages of a somewhat modified manufacture of the hose, namely with two strips 1 'of different material with a lower stiffness and 1 "of material with a somewhat higher stiffness.
  • the stiffer strips 1" are narrower.
  • state a) shows the three materials to be fed, namely strips 1 'and 1 ", each after the first folding, and two strips 35 of somewhat higher rigidity, which correspond to the U shown in FIG. 12 in state a)
  • state b) which illustrates successive turns, the folds 34, the strips 1 'and 1 "have already been set into one another, so that the folds of the strip 1' are always the inner folds and the folds of the strip 1 "always form the outer folds.
  • the band 35 with a U-cross section is now inserted one after the other, and then the neck lines of the folds 34 are pressed inwards again at the compression station 36, so that again the bottle-like cross-section arises which results in the connection structure line 38, which is shown in the next turn, in this embodiment two coils of connection structure line run n 38 parallel to each other around the hose.
  • the band 35 is intended to form the inner fold, which prevents the present middle fold from slipping out, while the outer fold is formed from the strip 1 ", which is here sufficiently rigid to achieve a clamping effect.
  • the cross-section shows a neck 39.
  • the state b) shows how the folds of the softer strip 1 'have been inserted into the folds of the harder strip 1 ", while according to the states c) the band 35 is first inserted in its folded form the compression station 36 is formed by the pressure rollers 37 into a bottle cross-section and then forms the connecting structure line 38, with a special inner fold 43 formed from the band 35, which otherwise does not form part of the hose wall, a middle fold 44 belonging to the softer strip 1 'and one which is more rigid Stripe 1 "belonging outer fold 45.
  • Fig. 12 the process is illustrated in such a way that the band 35 is first folded and then inserted into the folds 34 of the strips 1 'and 1 ". It is also possible to press the band 35 into the folds 34 of the strips with the aid of a pressure roller 1 'and 1 "to be introduced, this spinning roller also producing the U-cross section of the belt 35.
  • FIG. 13 shows the production of a hose again from hose material of a uniform nature, with the exception of the connecting structure lines, but with a more flexible material than that of the strip 1 "according to FIG. 12.
  • the film strip 1 is processed with great flexibility, which can consist, for example, of a thin aluminum foil laminated with glass fiber fabric or also of a plastic film
  • both a band 46 and the band 35 are additionally required in order to achieve a connecting structure line of sufficient strength Stripes and tapes, especially in the case of the soft stripe 1, the folds 34 can easily be formed together only after the overlap of the edge regions has been produced.
  • Condition b) shows the folds 34 of the strip 1 being joined together, whereupon the folds lying one inside the other may also already be pre-folded tapes 35 and 46 are introduced.
  • State c) indicates the change in shape at the compression station 36 due to the pressure rollers 37, whereupon a four-layer fold as the connecting structure line 38 arises, with an inner fold 48 made of the material of the connecting band 35, a middle fold 49 and an outer fold 50 made of the material of the strip 1 and an outer clip which is formed by the band 46.
  • This structure line 38 is shown again schematically in cross section in FIG. 14 on an enlarged scale.
  • the cross-sectionally bottle-shaped structure which is per se helically encircling, is shown schematically as approximately triangular.
  • the different layers are shown at a mutual distance in order to be able to distinguish them from one another in the drawing, but in fact they are tightly pressed together in the region of the neck 39.
  • the band 35 also has flanges 51 which lie on the outside of the surface of the strips 1.
  • the structural line 38 thus formed protrudes outward from the hose wall, so that the impression of a helical rib is created.
  • the fold protrude into the inside of the hose.
  • the inner fold 48 prevents, as explained, that the middle fold 49 and the outer fold 50 constrict when pulled and slip out of the neck 39.
  • the inner fold 48 fulfills this function in that it has a fold structure which, in the event of pressure on the neck 39, does not tend to wedge and expand the neck 39 due to its deformability and its size.
  • Protruding edges 52 of the two turns of the strip 1 help to ensure that the folds 49 and 50 are not pulled out of the fold in the longitudinal direction of the hose, sliding around the inner fold 48. This is further prevented by the tight contact of the various layers in the area of the neck 39.
  • FIG. 15 shows a structure using the overall structure according to FIGS. 13 and 14, but which has a modified inner fold.
  • This inner fold is in the form of a loose rim bead term role designed, which is made from the tape 35 and is used in the nested folds of the strip 1. After being compressed to form the neck 39, this folding structure also represents an obstacle to the other folds slipping out.
  • the structure according to FIG. 14 is, however, preferred for reasons of production technology.
  • Fig. 16 again shows a modified fold shape, in which, starting from the connection formation according to Fig. 13, a longer fold was formed overall, which is folded over again before the tape 45 is pulled open, so that the frictional area of the neck 39 is extended.
  • Fig. 16 shows the clip formed by the band 45 not fully pressed, so that the different positions of the fold are individually visible. To establish the connection between the hose turns, however, the band 45 is pressed as far as possible.
  • the protruding edges 52 of the strips may also be missing, particularly in the case of a somewhat rough strip material.
  • the strip edges then lie approximately in the region of the neck 39. It is also possible to leave only the strip laterally in the region of the neck 39 which faces the tube interior. The advantage of such a production is that the corresponding edge 52 cannot be erected and can protrude into the hose as a flow brake.
  • the hoses made from the flexible material of the strips 1 have a very high compressibility. For example, they can be completely compressed and transported with minimal volume and pulled apart again at the construction site.
  • the cross-sectional shape of the hoses can be adapted to existing requirements while the shape of the connecting structure line (s) 8 is permanently changed.
EP19820106873 1981-07-31 1982-07-29 Procédé de fabrication d'un tuyau flexible boudiné, et tuyau flexible boudiné Expired EP0071273B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82106873T ATE16361T1 (de) 1981-07-31 1982-07-29 Verfahren zum herstellen eines gewendelten schlauchs und gewendelter schlauch.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE3130323 1981-07-31
DE19813130323 DE3130323A1 (de) 1981-07-31 1981-07-31 Verfahren zum herstellen eines gewendelten schlauchs und gewendelter schlauch
DE3202516 1982-01-27
DE3202516 1982-01-27
DE3204244 1982-02-08
DE19823204244 DE3204244A1 (de) 1982-01-27 1982-02-08 Verfahren zum herstellen eines gewendelten schlauchs und gewendelter schlauch

Publications (2)

Publication Number Publication Date
EP0071273A1 true EP0071273A1 (fr) 1983-02-09
EP0071273B1 EP0071273B1 (fr) 1985-11-06

Family

ID=27189468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820106873 Expired EP0071273B1 (fr) 1981-07-31 1982-07-29 Procédé de fabrication d'un tuyau flexible boudiné, et tuyau flexible boudiné

Country Status (1)

Country Link
EP (1) EP0071273B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114613A1 (fr) * 1983-01-24 1984-08-01 Friedrich Bürcher Tuyau flexible hélicoidal

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT54473B (de) * 1910-10-14 1912-07-25 Jan Rysanek Verfahren zur Herstellung gefalzter Blechrohre aus schraubenförmig gewundenen Blechstreifen.
DE543926C (de) * 1932-05-25 Titeflex Metal Hose Co Biegsames Rippenrohr
US2337374A (en) * 1943-03-10 1943-12-21 Abel E Chernack Collapsible tubing
US2592336A (en) * 1949-03-10 1952-04-08 Wiremold Co Machine and method for forming collapsible tubing
US4084309A (en) * 1976-08-09 1978-04-18 Cecil Howard Wood Apparatus and method of manufacturing flexible ducting

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE543926C (de) * 1932-05-25 Titeflex Metal Hose Co Biegsames Rippenrohr
AT54473B (de) * 1910-10-14 1912-07-25 Jan Rysanek Verfahren zur Herstellung gefalzter Blechrohre aus schraubenförmig gewundenen Blechstreifen.
US2337374A (en) * 1943-03-10 1943-12-21 Abel E Chernack Collapsible tubing
US2592336A (en) * 1949-03-10 1952-04-08 Wiremold Co Machine and method for forming collapsible tubing
US4084309A (en) * 1976-08-09 1978-04-18 Cecil Howard Wood Apparatus and method of manufacturing flexible ducting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114613A1 (fr) * 1983-01-24 1984-08-01 Friedrich Bürcher Tuyau flexible hélicoidal

Also Published As

Publication number Publication date
EP0071273B1 (fr) 1985-11-06

Similar Documents

Publication Publication Date Title
EP0099999B1 (fr) Procédé de fabrication d'un tuyau renforcé
DE3135966C2 (de) Verfahren zur Herstellung mehrschichtiger Schraubennahtrohre
DE2829283C2 (de) Verfahren zur Herstellung schraubenförmig gewickelter und gerillter Rohre sowie Werkstück und Rohr nach diesem Verfahren
DE2127750B2 (fr)
DE2443691A1 (de) Gewickeltes doppelwandrohr sowie verfahren und bandmaterial zu seiner herstellung
DE2014648C2 (de) Verfahren zum Herstellen eines rohrförmigen Hohlkörpers durch wendelförmiges Wickeln eines Bandes aus thermoplastischem Kunststoff
DE3213551C1 (de) Vorrichtung zum Herstellen von Rohren,Behaeltern oder dergleichen zylindrischen Koerpern
DE935521C (de) Biegsamer Schlauch
DE3204244C2 (fr)
EP0727376A2 (fr) Dispositif pour diviser une bande de papier en mouvement
DE1486975B1 (de) Verfahren und Vorrichtung zur Herstellung von mehrschichtigen Beuteln oder Saecken
DE19507514C2 (de) Metallene Wickelhülse
DE1911326A1 (de) Verfahren und Vorrichtung zur Herstellung gewickelter Kunststoffrohre und gemaess diesem Verfahren hergestelltes Rohr
DE19515853C1 (de) Verfahren zum Ummanteln eines Kunststoffrohres mit einer Metallummantelung
EP0071273A1 (fr) Procédé de fabrication d'un tuyau flexible boudiné, et tuyau flexible boudiné
DE2106322A1 (de) Vorrichtung und Verfahren zur Her stellung von Rohrleitungen
DE2228496A1 (de) Verfahren und vorrichtung zum herstellen eines gewellten duennen bleches
EP0087613B1 (fr) Procédé et appareil pour la fabrication des tubes isolants à plusieurs couches en rubans de matière plastique expansée
EP0114613B1 (fr) Tuyau flexible hélicoidal
DE202007016314U1 (de) ISO STAR - Mehrschichtiger Rohrkörper
DE3540125C2 (fr)
DE3146371C2 (de) Aus kontinuierlich schraubenwendelförmig gewickeltem Bahnmaterial mit hoher Rückstellkraft nach elastischer Formgebung wie Papier, Pappe o.dgl. hergestellter Rohrstrang und Verfahren zu seiner Herstellung
DE3130323A1 (de) Verfahren zum herstellen eines gewendelten schlauchs und gewendelter schlauch
DE2555122C3 (de) Verfahren zum Verbinden von biegsamen, schlauchförmigen Stücken
DE2008277A1 (en) Spiral grooved flexible tube mfe

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): AT CH FR GB LI NL

17P Request for examination filed

Effective date: 19830805

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT CH FR GB LI NL

REF Corresponds to:

Ref document number: 16361

Country of ref document: AT

Date of ref document: 19851115

Kind code of ref document: T

ET Fr: translation filed
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: GB

Payment date: 19920716

Year of fee payment: 11

Ref country code: FR

Payment date: 19920716

Year of fee payment: 11

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

Ref country code: AT

Payment date: 19920727

Year of fee payment: 11

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

Ref country code: NL

Payment date: 19920731

Year of fee payment: 11

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

Ref country code: CH

Payment date: 19920819

Year of fee payment: 11

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

Ref country code: GB

Effective date: 19930729

Ref country code: AT

Effective date: 19930729

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

Ref country code: LI

Effective date: 19930731

Ref country code: CH

Effective date: 19930731

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

Ref country code: NL

Effective date: 19940201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930729

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

Ref country code: FR

Effective date: 19940331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST