EP0254941B1 - Abrichtwerkzeug für Schleifscheiben - Google Patents

Abrichtwerkzeug für Schleifscheiben Download PDF

Info

Publication number
EP0254941B1
EP0254941B1 EP87110065A EP87110065A EP0254941B1 EP 0254941 B1 EP0254941 B1 EP 0254941B1 EP 87110065 A EP87110065 A EP 87110065A EP 87110065 A EP87110065 A EP 87110065A EP 0254941 B1 EP0254941 B1 EP 0254941B1
Authority
EP
European Patent Office
Prior art keywords
diamond
dressing tool
tool according
layer
diamond grains
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87110065A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0254941A3 (en
EP0254941A2 (de
Inventor
Dietrich Borse
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.)
Saint Gobain Diamantwerkzeuge GmbH and Co KG
Original Assignee
Ernst Winter and Sohn Diamantwekzeuge GmbH and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ernst Winter and Sohn Diamantwekzeuge GmbH and Co filed Critical Ernst Winter and Sohn Diamantwekzeuge GmbH and Co
Publication of EP0254941A2 publication Critical patent/EP0254941A2/de
Publication of EP0254941A3 publication Critical patent/EP0254941A3/de
Application granted granted Critical
Publication of EP0254941B1 publication Critical patent/EP0254941B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/12—Dressing tools; Holders therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S76/00—Metal tools and implements, making
    • Y10S76/12—Diamond tools

Definitions

  • the invention relates to a dressing tool for grinding wheels, which carries a diamond coating on a base body, in which the diamonds are held in a metallic bond.
  • Such dressing tools can be cylindrical or specially profiled dressing rollers, as well as disks or dressing tiles.
  • Dressing is understood to mean the mechanical shaping of a rotating grinding wheel, the dressing tool being held or guided against the working surface of the grinding wheel in such a manner and producing a targeted output on the grinding wheel that the working surface of the grinding wheel is given a perfect concentricity.
  • a certain profile can be generated in a corresponding manner on the working surface of the grinding wheel.
  • the grinding wheel should often produce a certain roughness when grinding a workpiece on its surface.
  • the degree of this roughness depends on the way in which the dressing process was carried out on the grinding wheel.
  • the kinematic dressing conditions e.g. the feed speed of the dressing tool on the grinding wheel surface in the direction of the grinding wheel axis.
  • the size of the diamond grain and the density of the diamond grain arrangement in the dressing tool also have a significant influence on the effective roughness depth of the grinding wheel.
  • a simple but versatile form of a dressing tool contains the diamonds in a systematic or random arrangement in a flat plate, the so-called diamond coating.
  • the diamond coating is connected to a base body, which enables attachment to the grinding machine or in a device provided for dressing.
  • Such an embodiment of a dressing tool is referred to as a dressing tile.
  • the edge of the diamond covering is brought into contact with the grinding wheel in a tangential arrangement, the diamond grains lying in the area of the edge and being exposed to the grinding wheel effecting the targeted drive on the grinding wheel.
  • the diamond grains are located at certain distances from one another in the plate.
  • the diamond grains can lie in one layer in one plane.
  • Typical grain sizes of the diamond grains are between 0.5 mm and 1 mm. In cases where smaller diamond grains are used, they can also be stacked on top of each other.
  • the abrasive grains of which are normally made of corundum or silicon carbide experience relatively little wear.
  • the diamond grains must be held in place by the surrounding metallic bonding material so that they can offer sufficient resistance to the abrasive effect of the grinding wheel.
  • the binder metal in which the diamond grains are embedded must therefore also have a very high wear resistance.
  • Typical binding metals are alloys based on tungsten carbide and / or tungsten. When using less Wear-resistant binding materials, such as cobalt, nickel or bronze, cause a relatively rapid wear on these metals, so that the diamond grains embedded in them can fall out of the bond too quickly.
  • the diamond grains in the dressing tool are also subjected to high thermal stresses due to the intense friction on the grinding wheel. Therefore diamond grits are selected for such dressing tools, which have a high thermal resistance.
  • a disadvantage when using a metal bond based on tungsten or tungsten carbide is that relatively high sintering temperatures are required to produce this bond, which are in the range above 900 °, so that the sintered diamond grains more or be less thermally damaged.
  • a similar process to the sintering of metal powder is the usual sintering in combination with a liquid metal impregnation.
  • a manufacturing method in which the use of high temperatures is not required is the use of electrodepositable metal, e.g. Cobalt, nickel, bronze or copper.
  • electrodepositable metal e.g. Cobalt, nickel, bronze or copper.
  • these metals do not have a very high abrasion resistance.
  • the invention provides that the diamond grains are artificially roughened so that their surface area is at least twice as large as compared to the natural surface, and that the diamond grains are arranged in such a density that the majority of them align with neighboring diamond grains touched.
  • Such an artificially created surface topography enables an intimate anchoring of the diamond grains, in particular in an electrodepositable metal, since the metal is able to penetrate into the additional pores on the surface of the grains, which are preferably provided with undercuts. It is preferred for the topography of the surface if it has many relatively narrow depressions into which the metal can penetrate in a root-like manner, so that there is a mechanical connection between the binding metal and the diamond surface with great adhesive strength.
  • Such can be achieved in particular in that the diamond grains are provided with a metal with pore-shaped depressions by etching.
  • the thickness of the diamond coating influences the precision of a dressing process. Therefore, dressing tiles with a diamond coating thickness that is not greater than about 1 mm are particularly suitable.
  • a suitable diamond grit has the grit size of e.g. D 711.
  • Another variant of the dressing tools according to the invention is that diamond grain mixtures with different grain sizes are used to increase the density of the diamond grain arrangement, e.g. D 711 with D 501 or with D 181 or with D 46 or mixtures of several of these grain sizes.
  • Example B shows the results with a tile which has a high diamond content of 0.8 carat, but without an artificially enlarged surface as in example C with the same diamond content as embodiment B, but with the surface increased according to the invention.
  • these are tiles with a covering area of 10 mm x 15 mm and a working edge length of 10 mm as well as a diamond covering with a layer of diamond grains.
  • FIG. 1 to 3 show a dressing tool 1 for a grinding wheel 2, which is designed in the manner of a dressing tile.
  • the tool is provided with a holder 3 which carries a diamond plate 4.
  • the diamond plate 4 consists of diamond grains 5 of the same grain size, which are arranged such that they touch directly on the diamond grains 5 lying next to them.
  • the individual diamond grains 5, of which a diamond grain is shown in approximately 100 times magnification in FIG. 4, are artificially roughened, in particular by etching with a metal under the influence of heat.
  • the surfaces of the individual diamond grain designed as a cubo-octahedron are thereby provided with numerous pores 7, which are designed as depressions with undercuts corresponding to FIG. 5.
  • This increases the effective surface for holding the diamond grain within the bond by at least twice the natural surface size and the metal can penetrate into the individual pores in the manner of a root when galvanically applied, so that the adhesion is significantly improved.
  • FIG. 6 shows the possibility of arranging a large number of diamonds in a layerless structure in which the individual diamonds or diamond grains are located touch with their diamond grains next to and above and below.
  • a further increase in the proportion of diamond allows the use of diamond grains of different sizes according to FIG. 7, in which small diamonds lie in the gaps between the larger diamonds.
  • the diamonds of the described embodiment are synthetic diamonds whose use is particularly suitable for tools according to the invention. However, this does not preclude the use of natural diamonds.
  • a wear protection layer 10 on a diamond layer 4, which is preferably formed in a thickness of 0.1 to 1 mm and consists of diamonds which are bonded in a galvanically deposited metal such as colbalt or nickel preferably the surfaces of these diamonds in the wear protection layer 10 are enlarged by etching.
  • the arrangement of protective layers made of hard materials is known in other fields of application.
  • the protective layers are manufactured there using powder metallurgy.
  • This has the disadvantage that a relatively large protective layer thickness cannot be undershot in order to achieve a uniform layer thickness in the outer protective region, since thicknesses of just 0.8 mm lead to powder metallurgical problems.
  • a further disadvantage is that the diamond concentration in the process of powder metallurgy is procedurally strictly limited and that in practice a concentration of more than 60 or 2.6 carats / cubic centimeter has not been possible in practice.
  • These disadvantages of the powder metallurgy process can be avoided by using a galvanic deposit such.
  • Such precipitation allows the thickness of the side protective layer to be precisely limited so that, for example, layer thicknesses in the size of 0.2 to 1 mm can be used. It is possible, particularly for side protection, to significantly increase the diamond concentration to a concentration of 150 to 200, which is equivalent to 6.6 to 8.8 carats / cubic centimeter. Synthetic diamonds can be used for this, as can natural diamond grains, although there is generally a substantial improvement in the way the diamond grains are held within the electrodeposited layer if the diamonds have an increase in their surface area, preferably by etching, to preferably at least twice their natural size. which would not lead to any recognizable advantages in the case of a bond produced by powder metallurgy alone. It is particularly advantageous that particularly small grain sizes can be used, which are only about half the size of previously used grain sizes. This ensures an extremely tight fit of the previously treated diamonds in a galvanic bond, so that the degree of utilization for the high-quality diamond material improves.
  • the wear protection layer 10 is arranged on the front and the back of the diamond layer and additionally on the other two sides, the diamond layer 5, 6 is protected against movements in all directions.
  • FIGS. 9 and 10 show a dressing tile which has diamond grains 5 which are arranged in one layer. These diamond grains are artificially roughened and galvanically bonded in a metal 6. To protect the diamond grains 5, two protective layers 10 and 12 are provided, the thickness of which approximately corresponds to the thickness of the diamond layer 4, 5. The grain size of the diamond 5 is about 750 microns. The protective layers 10 and 12 are accordingly correspondingly strong. However, the protective layers consist of diamond grains of substantially smaller size, for example grains in the order of magnitude of 70 ⁇ m.
  • the additional protective layers 10 and 12 prevent the binding of the effective diamonds 5 from being washed out laterally. This has the advantage that the individual diamonds 5 of the dressing tool can be used to a greater extent because they are held longer by the protective layers on both sides.
  • the protective layers 10 and 12 thus result in an improvement in the mounting of the diamonds arranged in the middle, the mounting of which is in any case improved compared to comparable known arrangements by the artificial roughening of their surfaces and their galvanic bonding in an arrangement in which they touch one another directly .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Control Of Eletrric Generators (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP87110065A 1986-07-30 1987-07-11 Abrichtwerkzeug für Schleifscheiben Expired - Lifetime EP0254941B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3625754 1986-07-30
DE3625754 1986-07-30
DE3706868 1987-03-04
DE19873706868 DE3706868A1 (de) 1986-07-30 1987-03-04 Abrichtwerkzeug fuer schleifscheiben

Publications (3)

Publication Number Publication Date
EP0254941A2 EP0254941A2 (de) 1988-02-03
EP0254941A3 EP0254941A3 (en) 1989-07-05
EP0254941B1 true EP0254941B1 (de) 1992-01-29

Family

ID=25846058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110065A Expired - Lifetime EP0254941B1 (de) 1986-07-30 1987-07-11 Abrichtwerkzeug für Schleifscheiben

Country Status (19)

Country Link
US (1) US4805586A (da)
EP (1) EP0254941B1 (da)
KR (1) KR940011293B1 (da)
CN (1) CN1008156B (da)
AT (1) ATE72159T1 (da)
AU (1) AU604732B2 (da)
BR (1) BR8703906A (da)
CA (1) CA1273801A (da)
DE (2) DE3706868A1 (da)
DK (1) DK168197B1 (da)
ES (1) ES2029676T3 (da)
GR (1) GR3004334T3 (da)
IL (1) IL83266A (da)
IN (1) IN169849B (da)
MX (1) MX172003B (da)
PL (1) PL155240B1 (da)
PT (1) PT85459B (da)
RO (1) RO101606B (da)
YU (1) YU46063B (da)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3625743A1 (de) * 1986-07-30 1988-02-11 Winter & Sohn Ernst Verfahren zum bearbeiten von diamantkoernern
US4915089A (en) * 1988-01-28 1990-04-10 General Electric Company Tool for trueing and dressing a grinding wheel and method of use
DE3811584A1 (de) * 1988-04-07 1989-10-19 Winter & Sohn Ernst Schleifscheibe zum tiefschleifen
US5146909A (en) * 1990-12-28 1992-09-15 The General Electric Company Stationary fine point diamond trueing and dressing block and method of use
US5447208A (en) * 1993-11-22 1995-09-05 Baker Hughes Incorporated Superhard cutting element having reduced surface roughness and method of modifying
EP1790436A3 (en) * 1998-07-31 2009-01-07 Saint-Gobain Industrial Ceramics, Inc. Rotary dressing tool containing abrasive inserts
US6308700B1 (en) * 1999-10-25 2001-10-30 Dr Kaiser Co. Process and manufacturing of a rotary diamond dresser for trueing and dressing of industrial grinding wheels
DE10156661A1 (de) * 2001-11-17 2003-06-05 Saint Gobain Winter Diamantwer Diamant-Formabrichtrolle und Verfahren zur Herstellung
AU2002349498A1 (en) * 2001-12-13 2003-06-23 Nikon Corporation Grind stone and production method for optical element
US20050260939A1 (en) * 2004-05-18 2005-11-24 Saint-Gobain Abrasives, Inc. Brazed diamond dressing tool
US9095841B2 (en) * 2006-08-02 2015-08-04 Us Synthetic Corporation Separation device and chemical reaction apparatus made from polycrystalline diamond, apparatuses including same such as separation apparatuses, and methods of use
US7934978B2 (en) * 2007-05-10 2011-05-03 1339513 Ontario Ltd. Ice skate blade sharpening machine
US8277284B2 (en) 2007-05-10 2012-10-02 1339513 Ontario Ltd. Ice skate blade sharpening machines and associated method of dressing a grinding wheel
US8056907B2 (en) * 2008-05-02 2011-11-15 1339513 Ontario Ltd. Ice skate blades
US20090218287A1 (en) * 2008-03-03 2009-09-03 Us Synthetic Corporation Solid phase extraction apparatuses and methods
CN104531064A (zh) * 2008-09-16 2015-04-22 戴蒙得创新股份有限公司 具有独特形貌的磨粒
US8927101B2 (en) 2008-09-16 2015-01-06 Diamond Innovations, Inc Abrasive particles having a unique morphology
CA2736753C (en) * 2008-09-16 2015-09-01 Diamond Innovations, Inc. Abrasive grains having unique features
DE102009007992A1 (de) * 2009-02-07 2010-08-19 Ab Skf Beschichtungsanordnung
USD688343S1 (en) 2009-03-12 2013-08-20 1339513 Ontario Ltd. Flat bottom vee ice skate blade
CN102470463B (zh) 2009-07-31 2015-01-14 戴蒙得创新股份有限公司 包括表面改性的磨料颗粒的精密线材
JP5693144B2 (ja) * 2010-10-27 2015-04-01 豊田バンモップス株式会社 ロータリドレッサ
USD665830S1 (en) 2011-03-28 2012-08-21 1339513 Ontario Ltd. Multiple spinner carousel for dressing a grinding wheel
CA2833342C (en) * 2011-04-18 2020-05-12 3M Innovative Properties Company Resin bonded grinding wheel
RU2490112C1 (ru) * 2011-12-09 2013-08-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Ульяновский государственный технический университет" Способ очистки эльборового шлифовального круга
US10307891B2 (en) 2015-08-12 2019-06-04 Us Synthetic Corporation Attack inserts with differing surface finishes, assemblies, systems including same, and related methods
US10900291B2 (en) 2017-09-18 2021-01-26 Us Synthetic Corporation Polycrystalline diamond elements and systems and methods for fabricating the same

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2716404A (en) * 1951-06-02 1955-08-30 Prec Diamond Tool Company Diamond tool
GB742957A (en) * 1953-07-20 1956-01-04 Super Cut Diamond dressing tool
GB856047A (en) * 1957-01-10 1960-12-14 Dagobert William Alfred Fritz Improvements in diamond tools
DE1502642A1 (de) * 1963-05-13 1969-06-04 Naradi Narodni Podnik Diamantformwerkzeug
SE305791B (da) * 1964-02-06 1968-11-04 Diadur Ab
US3553905A (en) * 1967-10-10 1971-01-12 Jerome H Lemelson Tool structures
US3596649A (en) * 1968-04-04 1971-08-03 J K Smit & Sons Inc Abrasive tool and process of manufacture
DE2053125A1 (en) * 1970-10-29 1972-05-04 Winter & Sohn Ernst Sintered diamond tool - with orientated metal embedded needle shaped diamonds
US3894673A (en) * 1971-11-04 1975-07-15 Abrasive Tech Inc Method of manufacturing diamond abrasive tools
JPS5816988B2 (ja) * 1978-03-31 1983-04-04 本田技研工業株式会社 円筒研削用砥石の製造方法
DE2848603A1 (de) * 1978-11-09 1980-05-22 Naxos Union Schleifmittel Diamantplatten-abdrehwerkzeug fuer schleifscheiben
GB2038214A (en) * 1978-12-21 1980-07-23 Dianite Coatings Ltd Abrasive tool
DE3016740A1 (de) * 1980-04-30 1981-11-05 Lach-Spezial-Werkzeuge Gmbh, 6450 Hanau Abrichtwerkzeug
US4407263A (en) * 1981-03-27 1983-10-04 Diamond Giken Co., Ltd. Cutting blade
US4505721A (en) * 1982-03-31 1985-03-19 Almond Eric A Abrasive bodies
US4629373A (en) * 1983-06-22 1986-12-16 Megadiamond Industries, Inc. Polycrystalline diamond body with enhanced surface irregularities
JPS61100352A (ja) * 1984-10-22 1986-05-19 Toyota Banmotsupusu Kk 研削工具

Also Published As

Publication number Publication date
CN87105212A (zh) 1988-03-30
KR880001372A (ko) 1988-04-23
AU604732B2 (en) 1991-01-03
MX172003B (es) 1993-11-29
IL83266A0 (en) 1987-12-31
RO101606B (ro) 1992-01-13
DE3776448D1 (de) 1992-03-12
IN169849B (da) 1991-12-28
CN1008156B (zh) 1990-05-30
CA1273801A (en) 1990-09-11
DK393987D0 (da) 1987-07-28
US4805586A (en) 1989-02-21
PT85459A (pt) 1988-07-29
ES2029676T3 (es) 1992-09-01
KR940011293B1 (ko) 1994-12-05
GR3004334T3 (da) 1993-03-31
DE3706868A1 (de) 1988-02-11
YU143587A (en) 1990-04-30
DK393987A (da) 1988-01-31
AU7622887A (en) 1988-02-04
PL155240B1 (en) 1991-10-31
DK168197B1 (da) 1994-02-28
EP0254941A3 (en) 1989-07-05
BR8703906A (pt) 1988-04-05
PT85459B (pt) 1993-07-30
EP0254941A2 (de) 1988-02-03
YU46063B (sh) 1992-12-21
ATE72159T1 (de) 1992-02-15
PL267065A1 (en) 1988-07-07
IL83266A (en) 1992-09-06

Similar Documents

Publication Publication Date Title
EP0254941B1 (de) Abrichtwerkzeug für Schleifscheiben
DE69034066T2 (de) Schleifmittel und Verfahren zu dessen Herstellung
DE3872200T2 (de) Abrasives produkt.
DE69935084T2 (de) Drehende Abrichtrolle enthaltende abschleifende Einsätze
EP0982094A2 (de) Sägedraht
DE3918606C2 (de) Schleifwerkzeug und Verfahren zu dessen Herstellung
EP0336066B1 (de) Schleifscheibe zum Tiefschleifen
DD158625A5 (de) Abrichtwerkzeug
DE4338077C2 (de) Honelement
DE19625509A1 (de) Werkzeugkomponente
DE1758823B2 (de) Kernbohrer
EP0898504B1 (de) Schleifkörper
DE19716330A1 (de) Verfahren zur Herstellung einer Beschichtung auf einem Schleifwerkzeug
DE102010025677A1 (de) Abrichtwerkzeug
DE102019117799B4 (de) Zerspanungswerkzeug mit asymmetrischen Zähnen mit Schneidpartikeln
DE2922776C2 (da)
DE10216408C5 (de) Verfahren zum Herstellen eines Schneidwerkzeuges
DE8620429U1 (de) Abrichtwerkzeug für Schleifscheiben
DD270264A5 (de) Abrichtwerkzeug fuer schleifscheiben
DE4443074C1 (de) Verfahren zur Herstellung von abrasiv belegten Einkegelscheiben, insbesondere Abrichtscheiben
DE4402287A1 (de) Zahnradförmige Diamantabrichtrolle
DE743204C (de) Verfahren zum Herstellen von Schleif- und Schneidwerkzeugen mit auf einem metallischen Traeger galvanisch befestigten Schleifkoernern
EP0281004A1 (de) Schneidsegment für eine Säge zur Steinbearbeitung
DE3927356A1 (de) Werkzeug fuer die zerspanende bearbeitung mit verschleissschutzschicht und nachtraeglich verrundeten schneidkanten
DE10156661A1 (de) Diamant-Formabrichtrolle und Verfahren zur Herstellung

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

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19890714

17Q First examination report despatched

Effective date: 19910705

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

REF Corresponds to:

Ref document number: 72159

Country of ref document: AT

Date of ref document: 19920215

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3776448

Country of ref document: DE

Date of ref document: 19920312

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2029676

Country of ref document: ES

Kind code of ref document: T3

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

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3004334

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

Ref country code: LU

Payment date: 19940901

Year of fee payment: 8

EAL Se: european patent in force in sweden

Ref document number: 87110065.7

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: 19950711

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

Ref country code: SE

Payment date: 19970613

Year of fee payment: 11

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

Ref country code: ES

Payment date: 19970701

Year of fee payment: 11

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

Ref country code: GR

Payment date: 19970725

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: 19970731

Year of fee payment: 11

Ref country code: AT

Payment date: 19970731

Year of fee payment: 11

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

Ref country code: BE

Payment date: 19970902

Year of fee payment: 11

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

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980711

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

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980712

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 19980713

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

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980731

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980731

BERE Be: lapsed

Owner name: ERNST WINTER & SOHN G.M.B.H. & CO.

Effective date: 19980731

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

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990201

EUG Se: european patent has lapsed

Ref document number: 87110065.7

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19990201

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20010201

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: ERNST WINTER & SOHN (GMBH & CO.) TRANSFER- SAINT-G

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050711

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

Ref country code: DE

Payment date: 20060408

Year of fee payment: 20

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

Ref country code: CH

Payment date: 20060616

Year of fee payment: 20

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

Ref country code: GB

Payment date: 20060705

Year of fee payment: 20

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

Ref country code: FR

Payment date: 20060719

Year of fee payment: 20

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20070710