EP0560432A1 - Method and apparatus for the manufacture of an annular flange from metal strip - Google Patents
Method and apparatus for the manufacture of an annular flange from metal strip Download PDFInfo
- Publication number
- EP0560432A1 EP0560432A1 EP93200604A EP93200604A EP0560432A1 EP 0560432 A1 EP0560432 A1 EP 0560432A1 EP 93200604 A EP93200604 A EP 93200604A EP 93200604 A EP93200604 A EP 93200604A EP 0560432 A1 EP0560432 A1 EP 0560432A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- channel
- annular flange
- bending
- holding
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
-
- 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
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
- B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
- B21D19/046—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers for flanging edges of tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/02—Containers, packaging elements or packages, specially adapted for particular articles or materials for annular articles
- B65D85/04—Containers, packaging elements or packages, specially adapted for particular articles or materials for annular articles for coils of wire, rope or hose
Definitions
- the invention relates to a method for the manufacture of an annular flange from a metal strip.
- a flange is for example intended for use in packing cylindrical products such as coils of steel.
- the invention also relates to an apparatus and a turntable for use in the manufacture of such a flange.
- flanges used in practice for packing coils of steel are manufactured by a method illustrated by Figs. 1a-d described below, in which a metal strip is first deformed into an angle bar by bending or an angle bar is directly taken as a starting point.
- the angle bar is deformed by feeding one of its two faces through two toothed wheels which are set in such a way that they create a flange.
- the diameter of the flange so formed depends on among other things the gap between and the oblique alignment of the toothed wheels and on the deformation properties of the strip.
- This method is suitable particularly for manufacturing a series of flanges of the same diameter one after the other, after the correct settings have been found following the preparation of a number of test flanges.
- Evidence of this is also to be seen in the fact that flanges manufactured in this way intended for packing coils of steel are sold in a set range of sizes, the diameter sizes available commercially increasing in set increments.
- Another known method of making an annular flange is to deform a flat annulus of metal by bending one edge portion, as illustrated by GB-A-1404671 and GB-A-2147231.
- the object of the invention is to provide a method and an apparatus by which flanges of the desired size may be manufactured reproducibly and efficiently. Preferably different sizes can be easily selected.
- the circular shape of the strip need not be exact, since there is usually some tolerance for the final shape of the flange.
- the bending is preferably carried out by forming.
- forming is understood to be the gradual deformation of the cylindrical strip, which is preferably rotating, into a flange by pressing it against a rotating forming tool. This method is particularly suited to automation, notably where carried out with the aid of the apparatus of the invention to be described.
- the apparatus in accordance with the invention is characterized by holding means having a channel extending in a curved path for holding at least part of the strip in a circular shape, and bending means movable relative to the channel so as to bend an edge portion of the strip projecting from the channel to form the annular flange.
- the channel is carried by a turntable.
- the channel may be exactly circular, e.g. a complete circle, in which case the apparatus may further comprise means for feeding the strip into the channel tangentially and at an angle to the radial plane of the channel.
- the channel may have a spiral shape, which is not strictly circular, so that the diameter of the annular flange can be controlled by locating the strip at a location of the spiral channel of a desired diameter.
- the apparatus may have means for feeding the strip into the spiral channel comprising a clamp for the strip which is relatively movable radially and tangentially with respect to the channel.
- This spiral shape achieves the effect that the resultant flange size is infinitely adjustable by holding a strip of the correct length in a position in the spiral which corresponds with the desired flange diameter.
- the theoretical deviation from a pure circular shape occurring from the spiral shape can be so slight that it is negligible.
- the bending means is tooling of the forming type.
- This forming tooling may comprise a set of conical rollers between which the projecting part of the strip fits, the conical rollers being movable radially in relation to the channel.
- the apparatus may comprise a yoke with a movable slide fitted to it on which the conical rollers are placed.
- the gap between the conical rollers is less than twice the thickness of the strip multiplied by the number of flanges to be manufactured simultaneously.
- the invention also extends to the turntable for use in the method or the apparatus in accordance with the invention, having a channel of curved shape for receiving the strip.
- Figures 1a, 1b, 1c and 1d show strip, angle bar, deforming tool and flange in method steps used in current known practice.
- Figures 2a, 2b and 2c show strip, deforming tool and flange in steps in a method embodying the invention.
- FIGS 3a, 3b and 3c show method steps and another apparatus in another embodiment of the invention.
- Figure 3d shows the holder used in Figures. 3a-c, with additional parts, and Figure 3e is detail A of Figure 3d.
- a metal strip 1 is fed in from a coil 4 in the vicinity of the apparatus (Fig. 1a).
- the flange-forming apparatus consists essentially of a holder in the form of turntable 5 with a complete circular channel or groove 6 in one face and bending means in the form of forming rollers 8,9.
- the strip is fed into the channel 6 at a slight downward angle to the radial plane of the channel while simultaneously the holder is rotated so that the strip enters the channel 6 tangentially.
- the length of the strip is somewhat greater than the outside circumference of the channel 6 so that head and tail of the strip overlap one another. To make this overlap possible, the width of the channel is made slightly greater than twice the thickness of the strip.
- the strip is now lying edgewise in the channel 6 and has an edge portion projecting out of the channel.
- the forming tool which has a pair of conical forming rolls 8,9 with a gap between them is brought into position and moved with a controlled movement radially inwards while the holder 5 rotates.
- the shortest distance between the two forming wheels 8 and 9 which in accordance with GB-A-02147231 should be slightly less than the thickness of the strip, in the present case is slightly less than twice the strip thickness in order to make possible passage of the overlapping part of the flange in during formation.
- the strip 1 is fed tangentially into a holder having a turntable 14 containing a spiral channel 10 with the turntable 14 at standstill.
- the strip is further advanced by simultaneous rotation of the turntable 14 so that the strip moves along the outside of the holder until a position is reached as shown in Fig. 3b.
- the strip is held in this position by for example guide rollers 11 on the turntable.
- the head of the strip is held firmly by a clamping device 12 which is shown schematically in Fig. 3b and is freely movable radially and fixed tangentially relative to the turntable 14, while simultaneously the turntable 14 is rotated in the opposing direction.
- a clamping device 12 which is shown schematically in Fig. 3b and is freely movable radially and fixed tangentially relative to the turntable 14, while simultaneously the turntable 14 is rotated in the opposing direction.
- the strip is moved towards the centre of the spiral 10; travelling stops when the strip arrives at the desired flange diameter.
- the length of the strip is determined by the desired flange diameter.
- forming takes place by moving the forming tool 7 which is a pair of forming rollers, as shown in Fig. 3d in the direction of the arrow along a yoke 15 on which the tool 7 is supported by a carriage.
- the yoke 15 is made in such a way that it may be taken away for removal of the manufactured flange. During this, the direction of rotation of the turntable 14 may be reversed again, in order to prevent any relative motion of the strip relative to the turntable 14.
- the clamping device 12 may also be suspended on the yoke 15 as shown in Fig. 3d.
- the turntable 14 is for example composed of a spider frame of crossing beams on which a twin spiral of curved pieces of strip steel is welded.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Basic Packing Technique (AREA)
- Wire Processing (AREA)
Abstract
Description
- The invention relates to a method for the manufacture of an annular flange from a metal strip. Such a flange is for example intended for use in packing cylindrical products such as coils of steel. The invention also relates to an apparatus and a turntable for use in the manufacture of such a flange.
- The flanges used in practice for packing coils of steel are manufactured by a method illustrated by Figs. 1a-d described below, in which a metal strip is first deformed into an angle bar by bending or an angle bar is directly taken as a starting point. The angle bar is deformed by feeding one of its two faces through two toothed wheels which are set in such a way that they create a flange. The diameter of the flange so formed depends on among other things the gap between and the oblique alignment of the toothed wheels and on the deformation properties of the strip.
- This method is suitable particularly for manufacturing a series of flanges of the same diameter one after the other, after the correct settings have been found following the preparation of a number of test flanges. Evidence of this is also to be seen in the fact that flanges manufactured in this way intended for packing coils of steel are sold in a set range of sizes, the diameter sizes available commercially increasing in set increments.
- In practice packing stations keep a stock of flanges with varying diameters and for each coil to be packed the closest flange size is then sought out. In most cases, since the diameters of rolled coils vary infinitely, the closest available flange size will not achieve an optimum fit around the coil to be packed.
- Increasing the choice by reducing the increments in the size range does offer a solution to this problem but in practice may not be feasible because storage space at packing stations is generally too limited. Manufacturing the correct size in situ by the known method is also found to be impractical because there is always a restriction with the known method in relation to the resulting flange size, a restriction that is caused on the one hand by the manner of manufacture and on the other hand by the variation occurring in the deformation properties of the strip material used.
- Another known method of making an annular flange is to deform a flat annulus of metal by bending one edge portion, as illustrated by GB-A-1404671 and GB-A-2147231.
- The object of the invention is to provide a method and an apparatus by which flanges of the desired size may be manufactured reproducibly and efficiently. Preferably different sizes can be easily selected.
- The method in accordance with the invention is characterized by the steps of :
- (a) holding the strip by holding means in a cylindrical shape; and
- (b) bending an edge portion of the strip held in said cylindrical shape to form said annular flange.
- The circular shape of the strip need not be exact, since there is usually some tolerance for the final shape of the flange.
- In the method, simultaneously a plurality of strips may be held in the holding means and their edges bent together. This achieves a multiplication of the manufacturing capacity at very low cost.
- In the method of the invention, the bending is preferably carried out by forming. In this context forming is understood to be the gradual deformation of the cylindrical strip, which is preferably rotating, into a flange by pressing it against a rotating forming tool. This method is particularly suited to automation, notably where carried out with the aid of the apparatus of the invention to be described.
- The apparatus in accordance with the invention is characterized by holding means having a channel extending in a curved path for holding at least part of the strip in a circular shape, and bending means movable relative to the channel so as to bend an edge portion of the strip projecting from the channel to form the annular flange.
- Preferably the channel is carried by a turntable.
- This achieves the effect that the strip is free to rotate so that deforming may take place through rotation while the strip is held in a cylindrical shape so that the resultant flange size emerges predictably from the cylindrical shape.
- The channel may be exactly circular, e.g. a complete circle, in which case the apparatus may further comprise means for feeding the strip into the channel tangentially and at an angle to the radial plane of the channel.
- Alternatively the channel may have a spiral shape, which is not strictly circular, so that the diameter of the annular flange can be controlled by locating the strip at a location of the spiral channel of a desired diameter. In this case, the apparatus may have means for feeding the strip into the spiral channel comprising a clamp for the strip which is relatively movable radially and tangentially with respect to the channel. This spiral shape achieves the effect that the resultant flange size is infinitely adjustable by holding a strip of the correct length in a position in the spiral which corresponds with the desired flange diameter. The theoretical deviation from a pure circular shape occurring from the spiral shape can be so slight that it is negligible.
- In a preferred embodiment of the apparatus in accordance with the invention, the bending means is tooling of the forming type. This forming tooling may comprise a set of conical rollers between which the projecting part of the strip fits, the conical rollers being movable radially in relation to the channel.
- It should be noted that similar forming tooling is known from GB-A-2147231B. This patent specification deals with the manufacture of a lid with a bent edge.
- The apparatus may comprise a yoke with a movable slide fitted to it on which the conical rollers are placed.
- Preferably, during operation, the gap between the conical rollers is less than twice the thickness of the strip multiplied by the number of flanges to be manufactured simultaneously.
- The invention also extends to the turntable for use in the method or the apparatus in accordance with the invention, having a channel of curved shape for receiving the strip.
- Embodiments of the invention will now be described with reference to the drawings.
- Figures 1a, 1b, 1c and 1d show strip, angle bar, deforming tool and flange in method steps used in current known practice.
- Figures 2a, 2b and 2c show strip, deforming tool and flange in steps in a method embodying the invention.
- Figures 3a, 3b and 3c show method steps and another apparatus in another embodiment of the invention.
- Figure 3d shows the holder used in Figures. 3a-c, with additional parts, and Figure 3e is detail A of Figure 3d.
- In the several Figures, the same reference numerals indicate corresponding parts. In the known method of Figures 1a-
d a metal strip 1 in Fig. 1a is deformed by bending into anangle bar 2 when straight and flat as shown in Fig. 1b. By drawing this angle bar between two profiledwheels annular flange 3 is formed which serves for example for packing coils of rolled steel as shown in Fig. 1d, which shows twoflanges 3 at the ends of acoil 16. - In the method of the invention of Figs. 2a-c, first a
metal strip 1 is fed in from a coil 4 in the vicinity of the apparatus (Fig. 1a). The flange-forming apparatus consists essentially of a holder in the form ofturntable 5 with a complete circular channel or groove 6 in one face and bending means in the form of formingrollers - The strip is now lying edgewise in the channel 6 and has an edge portion projecting out of the channel. In practice it may be necessary to press the strip against the underside of the channel using a suitable pressing means not shown in the drawing. Next the forming tool which has a pair of conical forming
rolls holder 5 rotates. For details of this forming process reference should be made to the content of the aforementioned patent specification GB-A-2147231B. It should be noted that here the shortest distance between the two formingwheels - After a few revolutions the strip part projecting above the holder is fully bent and the
flange 3 of Fig. 2c is formed. The inner of the overlapping ends 13 of the metal is slightly contracted and the angle between the front (annular) part and the sleeve (cylindrical) part of the flange is somewhat greater than 90°, depending on the deformation properties of the strip. - In the embodiment of Figs. 3a-e, the
strip 1 is fed tangentially into a holder having aturntable 14 containing aspiral channel 10 with theturntable 14 at standstill. After the strip has been fed in over a part of its length into the channel 10 (Fig. 3a), the strip is further advanced by simultaneous rotation of theturntable 14 so that the strip moves along the outside of the holder until a position is reached as shown in Fig. 3b. The strip is held in this position by forexample guide rollers 11 on the turntable. - Next the head of the strip is held firmly by a
clamping device 12 which is shown schematically in Fig. 3b and is freely movable radially and fixed tangentially relative to theturntable 14, while simultaneously theturntable 14 is rotated in the opposing direction. By holding the head of the strip while rotating theturntable 14, the strip is moved towards the centre of the spiral 10; travelling stops when the strip arrives at the desired flange diameter. The length of the strip is determined by the desired flange diameter. Then forming takes place by moving the formingtool 7 which is a pair of forming rollers, as shown in Fig. 3d in the direction of the arrow along ayoke 15 on which thetool 7 is supported by a carriage. In practice, theyoke 15 is made in such a way that it may be taken away for removal of the manufactured flange. During this, the direction of rotation of theturntable 14 may be reversed again, in order to prevent any relative motion of the strip relative to theturntable 14. - The clamping
device 12 may also be suspended on theyoke 15 as shown in Fig. 3d. Theturntable 14 is for example composed of a spider frame of crossing beams on which a twin spiral of curved pieces of strip steel is welded.
Claims (11)
- A method for forming an annular flange (13) from a length of metal strip (1) by bending the strip, characterised by the steps of :(a) holding the strip (1) by holding means (5,10) in a cylindrical shape; and(b) bending an edge portion of the strip held in said cylindrical shape to form said annular flange (13).
- A method according to claim 1, wherein said holding means has a spiral channel (10), and said holding step (a) is performed by bringing the strip to a location in the spiral channel where the strip forms an approximate circle of a predetermined diameter.
- A method according to claim 1 or claim 2 wherein a plurality of annular flanges (13) are formed by holding and bending a plurality of strips (1) simultaneously.
- An apparatus for forming an annular flange (13) from a length of metal strip (1) characterized by holding means having a channel (6,10) extending in a curved path for holding at least part of the strip in a circular shape, and bending means (8,9) movable relative to the channel (6,10) so as to bend an edge portion of the strip projecting from the channel to form said annular flange.
- An apparatus according to claim 4, wherein said channel (6,10) is carried by a turntable (5,14).
- An apparatus according to claim 4 or claim 5, wherein said channel (6) is circular.
- An apparatus according to claim 6 further comprising means for feeding said strip (1) into said channel (6) tangentially and at an angle to the radial plane of the channel.
- An apparatus according to claim 4 or claim 5, wherein said channel (10) has a spiral shape, so that the diameter of the annular flange can be controlled by locating the strip (1) at a location of said spiral channel (10) of a desired diameter.
- An apparatus according to claim 8 having means for feeding said strip into said spiral channel (10) comprising a clamp (12) for said strip which is relatively movable radially and tangentially with respect to the channel (10).
- An apparatus according to any one of claims 4 to 9, wherein said bending means comprise a pair of rollers (8,9) having a bending gap therebetween, said pair of rollers being movable radially relative to said channel (6,10).
- A turntable (5,14) for use as holding means for the strip (1) in the method of claim 1 or the apparatus of claim 4, having a strip-receiving channel (6,10) extending in a curved path.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL9200473A NL9200473A (en) | 1992-03-13 | 1992-03-13 | METHOD, APPARATUS AND TURNTABLE FOR MANUFACTURING A COLLAR |
NL9200473 | 1992-03-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0560432A1 true EP0560432A1 (en) | 1993-09-15 |
EP0560432B1 EP0560432B1 (en) | 1996-06-12 |
Family
ID=19860556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19930200604 Expired - Lifetime EP0560432B1 (en) | 1992-03-13 | 1993-03-03 | Method and apparatus for the manufacture of an annular flange from metal strip |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0560432B1 (en) |
DE (1) | DE69303068T2 (en) |
NL (1) | NL9200473A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102343386A (en) * | 2010-07-27 | 2012-02-08 | 福特全球技术公司 | A method of incrementally forming a workpiece |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2231400A (en) * | 1937-08-25 | 1941-02-11 | American Rolling Mill Co | Hot coiler feeding means and method |
FR959857A (en) * | 1950-04-06 | |||
DE1752574A1 (en) * | 1968-06-15 | 1971-05-19 | Rudisleben Chemieanlagenbau | On-board machine with a receiving device arranged on it |
FR2329370A1 (en) * | 1975-10-31 | 1977-05-27 | Coil Protection Service | Thin walled steel cylinders with inner or outer flanged ends - are shaped by rolling cylinder ends through 90 degrees on former |
DD134493A1 (en) * | 1978-02-09 | 1979-03-07 | Wolfgang Freyer | DEVICE FOR RETRACTING METAL TRANSMITTERS |
GB2147231A (en) * | 1983-08-10 | 1985-05-09 | Hoogovens Groep Bv | Turning over the edge of a sheet metal disc |
-
1992
- 1992-03-13 NL NL9200473A patent/NL9200473A/en not_active Application Discontinuation
-
1993
- 1993-03-03 EP EP19930200604 patent/EP0560432B1/en not_active Expired - Lifetime
- 1993-03-03 DE DE1993603068 patent/DE69303068T2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR959857A (en) * | 1950-04-06 | |||
US2231400A (en) * | 1937-08-25 | 1941-02-11 | American Rolling Mill Co | Hot coiler feeding means and method |
DE1752574A1 (en) * | 1968-06-15 | 1971-05-19 | Rudisleben Chemieanlagenbau | On-board machine with a receiving device arranged on it |
FR2329370A1 (en) * | 1975-10-31 | 1977-05-27 | Coil Protection Service | Thin walled steel cylinders with inner or outer flanged ends - are shaped by rolling cylinder ends through 90 degrees on former |
DD134493A1 (en) * | 1978-02-09 | 1979-03-07 | Wolfgang Freyer | DEVICE FOR RETRACTING METAL TRANSMITTERS |
GB2147231A (en) * | 1983-08-10 | 1985-05-09 | Hoogovens Groep Bv | Turning over the edge of a sheet metal disc |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102343386A (en) * | 2010-07-27 | 2012-02-08 | 福特全球技术公司 | A method of incrementally forming a workpiece |
Also Published As
Publication number | Publication date |
---|---|
NL9200473A (en) | 1993-10-01 |
DE69303068T2 (en) | 1996-11-07 |
DE69303068D1 (en) | 1996-07-18 |
EP0560432B1 (en) | 1996-06-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN105052021B (en) | For producing the method and apparatus unshakable in one's determination of motor | |
US6540126B2 (en) | Clamping band manufacturing machine and method of manufacturing clamping band | |
US10207311B2 (en) | Machine for the production of coiled gaskets | |
US20070186605A1 (en) | Method and device for coiling thin metal strip, especially hot-rolled or cold-rolled thin steel strip | |
JPH0353056B2 (en) | ||
US3608347A (en) | Process and apparatus for manufacturing rings | |
US3779060A (en) | Method and apparatus for making stepped rims | |
JP5703989B2 (en) | Edgewise coil winding apparatus and winding method | |
US3797088A (en) | Method of manufacturing cylindrical blanks | |
EP0560432B1 (en) | Method and apparatus for the manufacture of an annular flange from metal strip | |
TWI763901B (en) | Machine and method for bending oblong elements, preferably metal, such as bars, rod, section bars or suchlike | |
US4583675A (en) | Method of production of a part formed with an opening | |
EP1706224B1 (en) | Device and method for forming coils of rolled or drawn long products | |
US10456825B2 (en) | Method for press-rolling a timepiece mainspring | |
GB1581386A (en) | Method and apparatus for producing bent angel pieces | |
US4955118A (en) | Method of manufacturing a roll of coiled, clamped barbed wire | |
US4688407A (en) | Method and apparatus for radial expansion of rings | |
JPH0647139B2 (en) | Ring flange molding method and molding apparatus | |
JPH1119743A (en) | Manufacture of coil spring and device therefor | |
US2892919A (en) | Apparatus for making a filter element | |
US4543071A (en) | Apparatus for producing a magnetron | |
JPS6313624A (en) | Radius bending method for rectilinear inclined wall shape and device therefor | |
SU1655628A1 (en) | Method for producing flat flange on tube | |
SU1484420A1 (en) | Device for coiling springs | |
JPH05277569A (en) | Bending method for pipe |
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 |
|
17P | Request for examination filed |
Effective date: 19930303 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE FR LU NL |
|
17Q | First examination report despatched |
Effective date: 19950913 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: HOOGOVENS STAAL B.V. |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE DE FR LU NL |
|
ET | Fr: translation filed | ||
REF | Corresponds to: |
Ref document number: 69303068 Country of ref document: DE Date of ref document: 19960718 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19970210 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19970224 Year of fee payment: 5 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19970331 Ref country code: BE Effective date: 19970331 |
|
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 | ||
BERE | Be: lapsed |
Owner name: HOOGOVENS STAAL B.V. Effective date: 19970331 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19971001 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 19971001 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19980331 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19981201 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |