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US20040231385A1 - Rotary tools for in-line perforation of profiled products - Google Patents

Rotary tools for in-line perforation of profiled products Download PDF

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Publication number
US20040231385A1
US20040231385A1 US10/482,168 US48216804A US2004231385A1 US 20040231385 A1 US20040231385 A1 US 20040231385A1 US 48216804 A US48216804 A US 48216804A US 2004231385 A1 US2004231385 A1 US 2004231385A1
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US
United States
Prior art keywords
tools
cuts
pair
metal sheet
rotary
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.)
Abandoned
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US10/482,168
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English (en)
Inventor
Richard Kergen
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.)
ArcelorMittal Liege Upstream SA
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
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Assigned to RECHERCHE & DEVELOPPEMENT DU GROUPE COCKERILL SAMBRE reassignment RECHERCHE & DEVELOPPEMENT DU GROUPE COCKERILL SAMBRE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KERGEN, RICHARD
Publication of US20040231385A1 publication Critical patent/US20040231385A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/143—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/36—Perforating, i.e. punching holes using rotatable work or tool holders
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/243—Perforating, i.e. punching holes in profiles

Definitions

  • the present invention relates to a new method for combining industrial operations of cutting and shaping, preferably in line.
  • the invention also relates to rotary tools allowing to implement the method.
  • One of the techniques for producing partitions with acoustic sound-absorbing properties is based on the use of shaped metal facings with a surface having numerous holes.
  • the current methods consist in using either perforated shaped products, generally with round holes of small diameter, or otherwise shaped products in which punctures have been produced.
  • the punctures are partial cuts leaving the cut waste attached to the metal sheet, these cuts generally being rectangular.
  • the above-mentioned shaped products are characterised by a very high density of cuts, of the order of several thousand holes per square metre.
  • Shaping ranks among the most-used techniques allowing to produce cable conduits. In this case, the operations of cutting and shaping also have to be combined. The number of cuts, lower than in the case of acoustic shaped products, still remains very high.
  • the cuts produced with a press may be produced before the shaping operation, off the shaping line, or by a press installed within the shaping line or even after the shaping operation.
  • Rotary tools offer an interesting alternative to the use of presses in the sense that they can operate at speeds that are compatible with that of the shaping line.
  • the angle of the waste relative to the plane of the metal sheet is closer to 45° than to 90°, which significantly reduces the visible aperture.
  • the acoustic shaped products produced with the puncture technique thus present significantly worse performances than those produced by drilling.
  • the American patent U.S. Pat. No. 4,766,707 describes a machine comprising a first pair of rotary drums for drilling followed by a second pair of rotary drums for cutting a metal strip. According to the proposed installation, this machine is followed by a forming or folding machine with a view to producing clips intended for roofing panels.
  • the first pair of tools produces a conical embossing or a hole which subsequently serves to receive a fixation means, such as nails.
  • the second pair of tools produces a transverse groove on each longitudinal edge of the strip, two adjacent sections of strip now being only loosely connected in the middle, with a view to favor the subsequent easy separation of the clips.
  • the speeds of both types of operations are significantly different.
  • the present invention aims to provide a solution allowing to overcome the drawbacks of the state of the art.
  • the present invention aims to propose a rotary tool technology allowing either to cut numerous small-sized holes on the shaping line, or to produce punctures with improved geometry without adversely affecting the shaping speed.
  • the present invention relates to a device comprising rotary cutting tools for combining cutting and shaping operations on metal sheets, the density of cuts preferably being very high, said cutting operations preferably being integrated into an automated shaping line, characterised in that it comprises a first pair of rotary cutting tools producing a first set of cuts and a second pair of rotary cutting tools completing and finishing off the first cuts by a second set of cuts or by folding in order to obtain a final closed cut with the drop of cut waste or a puncture, respectively.
  • the first pair of rotary tools cuts in the transverse direction relative to the travel direction of the metal sheet in order to produce notches and the second pair of rotary tools cuts in the longitudinal direction relative to the travel direction of the metal sheet. It should be noted that the roles of both pairs of tools may be reversed (first cut in the longitudinal direction, then in the transverse direction).
  • said first pair of tools cuts on three adjacent sides of said rectangle and said second pair of tools makes a fold relative to the axis formed by the fourth side of said rectangle.
  • said rotary tools are mounted on shafts supported by bearings, the axes of which are perpendicular to the travel direction of the metal sheet.
  • the rotation direction of the upper and lower tools is such that the tangential speed of said tools at the point of contact with the metal sheet is in the same direction and essentially of the same magnitude as the speed at which the metal sheet passes.
  • said device comprises a means for ensuring the relative positioning depending on the circumference of the teeth of the upper and lower tools of said first pair of circular tools, said means preferably being a gearbox that takes up the play in order to synchronise the shafts.
  • the first pair of tools comprises an upper tool comprising an alternating series of simple circular knives and of spacers and a lower tool comprising an alternating series of simple circular knives and elements acting as lateral knives.
  • the second pair of tools comprises an upper tool and a lower tool, each comprises an alternating series of simple circular knives and of spacers.
  • each upper simple, circular knife comprises teeth on its periphery, the arc of which having a length that is equivalent, apart from the sets of cuts, to the distance between the two notches associated with the same final cut and produced by the first pair of tools.
  • the simple, circular knives, together with the spacers of the second pair of tools, have widths that are essentially equivalent apart from the sets of cuts.
  • the device of the invention is advantageously provided with a means for favoring the discharge of the cut waste, preferably combs, the teeth of which fit between the simple, circular knives of the second pair of tools.
  • the upper tool of the second pair of tools may be provided with teeth which are rounded or smoothed at the level of the fold line and have sets that are compatible with the fold.
  • Another aspect of the present invention relates to a method for combining operations of drill-type cutting and shaping of metal sheets, the density of the cuts preferably being very high, said cutting operations preferably being integrated within an automated shaping line, characterised by the following successive stages:
  • a first pair of rotary cutting tools produces a first set of transverse cuts relative to the travel direction of the metal sheet
  • a second pair of rotary cutting tools produces a second set of longitudinal cuts relative to the travel direction of the metal sheet, the combined result of both operations being a set of closed cuts, preferably rectangular;
  • the cut waste is discharged by the movement of the tools, preferably by means of combs that are incorporated into the second pair of tools and/or transversally discharged by a transport belt.
  • the invention also relates to a method for combining puncturing and shaping operations on metal sheets, said cutting operations preferably being integrated into an automated shaping line, characterised by the following successive stages:
  • a first pair of rotary cutting tools produces a first set of U-shaped cuts forming a rectangle
  • a second pair of rotary cutting tools produces a fold, the axis of which intended on the remaining side for forming a set of rectangular cuts of the puncture type
  • the method of the invention can combine, on a same machine, cutting and puncturing operations distributed along metal sheet strips that are parallel to the travel direction of the metal sheet, said punctures being produced in areas that do not come into contact with the shaping tools.
  • said rectangular drilled or punctured cuts are shifted, the shift between two adjacent cuts being equal to the longitudinal pitch (Plg) divided by a shift parameter X, X being non-zero.
  • the device of the invention is used in order to produce partitions the acoustic sound-absorbing properties, to produce cable conduits or even to produce metal shelves.
  • FIG. 1 shows an overview of the rotary tool system according to the present invention.
  • FIG. 2 shows two tool elements belonging to the first pair of rotary tools corresponding to FIG. 1.
  • FIG. 3 shows an elevated view of the first pair of rotary tools according to the invention.
  • FIG. 4 shows two particular embodiments of the teeth of the upper rotary tool shown in FIG. 3.
  • FIG. 5 shows the detail of the notches produced with the first pair of tools according to one preferred embodiment of the invention.
  • FIG. 6 shows a detailed view of both tool elements belonging to the second pair of corresponding rotary tools of FIG. 1.
  • FIG. 7 shows an elevated view of the second pair of rotary tools according to the invention.
  • FIG. 8 shows an optimised positioning diagram for the cuts in the metal sheet, according to the invention.
  • FIG. 9 shows the parameters allowing to define the cuts like those shown in FIG. 8.
  • FIG. 10 shows a real example of a cutting diagram according to the invention.
  • FIG. 11 shows the detail of the cuts produced with the first pair of tools according to a second preferred embodiment of the invention, alternately in the longitudinal and transverse directions, respectively.
  • FIG. 12 shows the detail of the teeth of the simple folding tool on the second pair of tools corresponding to the cuts in FIG. 11.
  • the present invention aims to obtain either a rectangular cut or a puncture by splitting the operations into two phases so as to ensure a good quality of cut and easy discharge of the waste in the case of the cut or a good quality of cut and fold in the case of the puncture.
  • the basic principle, shown in FIG. 1, consists in using two successive pairs of rotary tools.
  • this principle allows to split the cutting operation into two phases.
  • the first pair of rotary knives produces transverse cuts relative to the travel direction of the metal sheet.
  • the second pair produces longitudinal cuts and ensures easy discharge of the waste.
  • the first pair of knives produces, for instance, cuts on three sides.
  • the second pair then folds back the cut waste, which allows to obtain a significantly improved visible aperture compared with the state of the art.
  • the successive operations performed by the rotary tools are carried out on different areas and are used for completely different purposes.
  • FIG. 1 shows an overview of the system.
  • a first pair of rotary tools comprising tools 1 and 2 , mounted on shafts 6 and 6 ′ respectively, produces a partial cut in the metal sheet without discharging the waste.
  • the cut is finished off by a second pair of tools comprising tools 3 and 4 , mounted on shafts 6 ′′ and 6 ′′′ respectively.
  • These shafts are supported by bearings mounted in heads that are similar to the shaping heads (not shown).
  • the rotation direction of each tool is indicated (B, B′, B′′, B′′′).
  • the metal sheet travels in the direction A, in the direction indicated, and is equivalent to the peripherical speed that is shared by tools 1, 2, 3 and 4.
  • FIG. 2 shows the upper 11 and lower 21 circular tool elements which produce a notch 7 perpendicular to the travel direction of the metal sheet 5 (see FIG. 5).
  • the upper tool 1 comprises a stack of simple circular tools 11 and of spacers 12 . These tool elements are mounted on the shaft 6 , positioned and fixed onto the shaft in the rotation direction by elements such as pins. These elements are also fixed in the axial direction so as to ensure precise positioning.
  • the lower tool 2 similarly comprises a stack of elements 21 , facing the elements 11 and separated by elements 22 serving as lateral knives when cutting the notch 7 .
  • the elements 21 and 22 are fixed in rotation and are positioned in the axial direction, as is the case for tool 1 .
  • the elements 11 , 21 and 22 are preferably made of a thermally-treated tool steel, as is the case for standard cutting tools.
  • This construction method of the rotary tools is especially advantageous since it allows the economic manufacture of the tools, as the elements such as 11 or 21 may be produced by wire cutting a stack of disks made of treated tool steel.
  • the positioning in the axial direction of the tools 1 and 2 is ensured by stops mounted on the shafts at the level of the bearings located in the support head.
  • the relative radial positioning of the teeth of the circular tools 11 and 21 is ensured by at least one gearbox which synchronises the shafts 6 and 6 ′. These are preferably gears that take up the play so as to ensure the precise positioning that is compatible with the sets of cuts.
  • At least one of the shafts 6 or 6 ′ is motor-driven so as to guarantee a circumpherential rotation speed of the tools that is equal to the travel speed of the metal sheet A.
  • FIG. 4 shows two embodiments of the teeth 111 or 111 ′ of the circular tool 11 .
  • the metal sheet After passing through the first pair of rotary tool, the metal sheet has notches 7 as shown in FIG. 5.
  • FIGS. 6 and 7 show the simple knives 31 and 41 performing the second cutting operation.
  • the circular knife 31 has teeth 311 on its periphery, the arc of which has a length that is equivalent, apart from the sets of cuts, to the distance between two successive notches 7 .
  • the complete upper circular tool 3 comprises a stack of simple knives 31 separated by spacers 32 .
  • the axial and circumpherential positioning of the knives 31 is similarly ensured as that of tools 1 and 2 .
  • the shaft 6 ′′ is synchronised relative to the shaft 6 so as to ensure the precise positioning of the notches 7 relative to the knives 311 . This synchronisation is for instance achieved by a system of gears.
  • the tool 4 comprises a stack of simple cutting disks 41 and spacers 42 (FIG. 7). Their axial positioning is ensured as for the tools 1 and 2 , the relative positioning of the tools 3 and 4 must only be guaranteed in the axial direction.
  • the elements of tools 11 , 21 and 31 and the spacers 42 have widths that are equivalent, apart from the sets of cuts.
  • the cut waste is very easily discharged between the disks 41 , a comb, the teeth of which fit between the disks 41 , may possibly be provided in order to ensure the discharge of waste which would be stuck between the cutting disks 41 , the waste then being transversally discharged, for example by means of a transport belt.
  • FIG. 8 diagrammatically shows an optimised positioning of cut. Indeed, a delicate stage of the method is delivering the right amount of cutting force ut, particularly when cutting the notches with tools 1 and 2 . In order to reduce this force, it may therefore be worthwhile to shift the cuts as shown in FIG. 8.
  • the parameters to be considered are shown in FIG. 9: the transverse pitch Ptr, the longitudinal pitch Plg, the transverse cut DecTr and the longitudinal cut DecLg.
  • the cutting rate a parameter which determines for instance the acoustic quality of the panels, is the ratio between the surface cut (DecTr ⁇ DecLg) and the surface of the pitches (Plg ⁇ Ptr).
  • a sufficiently high value is selected for the parameter X which determines the shift so as to reduce the force on the shafts. Indeed, the higher the value of parameter X, and particularly if X is not a whole number, the less cuts there are being simultaneously produced.
  • Another important parameter is the ratio between the uncut longitudinal length, Plg-DecLg, and the shift pitch, Plg/X. If this ratio is a whole number, some of the first cuts of rectangular holes coincide with the second cuts shifted by a number of rows equal to said ratio. In this case, the number of cuts simultaneously produced is relatively high, which puts a relatively high bending load on the shafts, but with the cuts being produced in pairs, the radial forces on the knives compensate each other, which reduces the torque applied to the shafts. If the cutting parameters are chosen so that this ratio (Plg ⁇ DecLg)/(Plg/X) is not a whole number, the number of cuts being simultaneously produced is reduced, which reduces the bending force but increases the torque applied to the shafts.
  • Table 1 shows a suitable choice of parameters corresponding to a ratio which is not a whole number and FIG. 10 shows a concrete example of a cutting pattern.
  • the technique of the invention also allows to optimise the cutting of punctured holes, i.e. without discharge of material.
  • FIG. 11 The technology of the tools is identical in its principle.
  • a U-shaped cut is produced on the first pair of tools 1 and 2 , as shown at 7 ′ (longitudinal direction) or 7 ′′ (transverse direction) in FIG. 11.
  • the teeth of type 111 of the simple tool 11 are consequently adapted.
  • a fold, and no longer a cut as before, is produced at 8 on the second pair of tools.
  • the teeth 311 of the simple tool 31 are of course consequently adapted: rounded at the level of the fold edge and sets compatible with the folding.
  • FIG. 12 shows typical views of this type of puncture for the longitudinal direction and for the transverse direction.
  • the diameter of the tools will be dictated by the considerations of material resistance which set the dimensions of the shafts but also by the contact conditions of the circular tool with the metal sheet.
  • the radii of the tools 1 and 2 will therefore preferably be equal to or greater than 100 times the thickness of the metal sheet.
  • different radii may also be chosen for tools 3 and 4 , tool 4 having for instance a radius that is sensibly greater than tool 3 so as to ensure good support for the metal sheet during the folding operation.
  • cutting and puncturing operations may be combined in a single machine along belts that are parallel to the travel direction of the metal sheet, the punctures being located in areas that do not come into contact with the shaping tools.
  • Ptr DecTr Plg DecLg Trans. (Trans. (Long. (Long. Shift Rate Pitch) Displ.) Pitch) Displ.)
  • Ptr/X 15 10 5 31.41 9.42 6.28 15 20 10 31.41 9.42 5.23 15 20 6.6 31.41 14.28 5.23 30 10 5 15.7 9.42 2.61 30 20 10 15.7 9.42 2.61 30 15 7.5 15.7 9.42 2.61

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Food-Manufacturing Devices (AREA)
  • Adornments (AREA)
  • Toys (AREA)
  • Punching Or Piercing (AREA)
US10/482,168 2001-07-06 2002-07-04 Rotary tools for in-line perforation of profiled products Abandoned US20040231385A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP01870156A EP1273365A1 (de) 2001-07-06 2001-07-06 Rotierendes Stanzwerkzeug zum kontinuierlischen Lochen von Profilen
EP01870156.5 2001-07-06
PCT/BE2002/000115 WO2003004191A1 (fr) 2001-07-06 2002-07-04 Outils rotatifs pour le percage en ligne de produits profiles

Publications (1)

Publication Number Publication Date
US20040231385A1 true US20040231385A1 (en) 2004-11-25

Family

ID=8184999

Family Applications (1)

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US10/482,168 Abandoned US20040231385A1 (en) 2001-07-06 2002-07-04 Rotary tools for in-line perforation of profiled products

Country Status (11)

Country Link
US (1) US20040231385A1 (de)
EP (2) EP1273365A1 (de)
JP (2) JP2004532739A (de)
KR (1) KR20040032849A (de)
CN (1) CN1286593C (de)
AT (1) ATE298637T1 (de)
BR (1) BR0211239B1 (de)
DE (1) DE60204888T2 (de)
ES (1) ES2243743T3 (de)
PT (1) PT1404469E (de)
WO (1) WO2003004191A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10350776B2 (en) 2016-05-11 2019-07-16 Zenith Cutter, Inc. Cutoff knife serration

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015124739A1 (en) * 2014-02-20 2015-08-27 Merck Patent Gmbh Implant comprising fgf-18
WO2019013188A1 (ja) * 2017-07-14 2019-01-17 株式会社江東彫刻 ロールカッタ装置

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1455342A (en) * 1922-05-31 1923-05-15 Samuel M Langston Method of making shingle strips
US1508365A (en) * 1920-07-06 1924-09-09 Jr Alan R Lukens Method of cutting out strip-shingle units
US1834004A (en) * 1925-11-28 1931-12-01 Patent & Licensing Corp Method of producing shingle strips
US1840997A (en) * 1924-04-16 1932-01-12 Barrett Co Method of forming shingle strips
US1931468A (en) * 1929-11-11 1933-10-17 Moore Shank Company Punching machine
US2836018A (en) * 1956-09-25 1958-05-27 Gen Motors Corp Manufacturing device
US3896650A (en) * 1971-08-04 1975-07-29 Wheeling Pittsburgh Steel Corp Steel building components with attachment means for wall and floor surface elements and manufacture thereof
US4068366A (en) * 1975-11-03 1978-01-17 Hans Hillesheim Method and apparatus for producing openings in sheet material
US4418558A (en) * 1981-07-27 1983-12-06 Bantam Systems, Inc. Method of manufacture of ventilated sheet metal floor members
US4766707A (en) * 1985-04-03 1988-08-30 Knudson Gary Art Strip of loosely connected hold down clips
US5088309A (en) * 1990-04-23 1992-02-18 Knudson Gary Art Rotary punch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1219364B1 (de) * 1999-09-03 2005-03-02 Toyo Kohan Co., Ltd. Metallblechstanzwalze, metallblechstanzvorrichtung mit einer solchen walze und metallblechstanzverfahren

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1508365A (en) * 1920-07-06 1924-09-09 Jr Alan R Lukens Method of cutting out strip-shingle units
US1455342A (en) * 1922-05-31 1923-05-15 Samuel M Langston Method of making shingle strips
US1840997A (en) * 1924-04-16 1932-01-12 Barrett Co Method of forming shingle strips
US1834004A (en) * 1925-11-28 1931-12-01 Patent & Licensing Corp Method of producing shingle strips
US1931468A (en) * 1929-11-11 1933-10-17 Moore Shank Company Punching machine
US2836018A (en) * 1956-09-25 1958-05-27 Gen Motors Corp Manufacturing device
US3896650A (en) * 1971-08-04 1975-07-29 Wheeling Pittsburgh Steel Corp Steel building components with attachment means for wall and floor surface elements and manufacture thereof
US4068366A (en) * 1975-11-03 1978-01-17 Hans Hillesheim Method and apparatus for producing openings in sheet material
US4418558A (en) * 1981-07-27 1983-12-06 Bantam Systems, Inc. Method of manufacture of ventilated sheet metal floor members
US4766707A (en) * 1985-04-03 1988-08-30 Knudson Gary Art Strip of loosely connected hold down clips
US5088309A (en) * 1990-04-23 1992-02-18 Knudson Gary Art Rotary punch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10350776B2 (en) 2016-05-11 2019-07-16 Zenith Cutter, Inc. Cutoff knife serration

Also Published As

Publication number Publication date
BR0211239A (pt) 2004-08-10
JP2004532739A (ja) 2004-10-28
BR0211239B1 (pt) 2011-04-19
ES2243743T3 (es) 2005-12-01
PT1404469E (pt) 2005-11-30
CN1524021A (zh) 2004-08-25
EP1404469A1 (de) 2004-04-07
DE60204888T2 (de) 2006-06-29
DE60204888D1 (de) 2005-08-04
EP1404469B1 (de) 2005-06-29
CN1286593C (zh) 2006-11-29
JP2007175780A (ja) 2007-07-12
WO2003004191A1 (fr) 2003-01-16
EP1273365A1 (de) 2003-01-08
ATE298637T1 (de) 2005-07-15
KR20040032849A (ko) 2004-04-17

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Owner name: RECHERCHE & DEVELOPPEMENT DU GROUPE COCKERILL SAMB

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KERGEN, RICHARD;REEL/FRAME:014967/0122

Effective date: 20040112

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION