EP0184767B1 - Presse à double ruban pour un gâteau de matière avançant en continu - Google Patents

Presse à double ruban pour un gâteau de matière avançant en continu Download PDF

Info

Publication number
EP0184767B1
EP0184767B1 EP85115387A EP85115387A EP0184767B1 EP 0184767 B1 EP0184767 B1 EP 0184767B1 EP 85115387 A EP85115387 A EP 85115387A EP 85115387 A EP85115387 A EP 85115387A EP 0184767 B1 EP0184767 B1 EP 0184767B1
Authority
EP
European Patent Office
Prior art keywords
press
band
pressure
sliding surface
surface seal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85115387A
Other languages
German (de)
English (en)
Other versions
EP0184767A1 (fr
Inventor
Kurt Held
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
Application filed by Individual filed Critical Individual
Publication of EP0184767A1 publication Critical patent/EP0184767A1/fr
Application granted granted Critical
Publication of EP0184767B1 publication Critical patent/EP0184767B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
    • B30B5/06—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band
    • B30B5/062—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band urged by directly-acting fluid pressure
    • 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
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/906—Seal for article of indefinite length, e.g. strip, sheet

Definitions

  • the invention relates to a double belt press for a continuously advancing material web with a rigid press frame, with deflection drums rotatably mounted on bearing pressures of the press frame, with an upper and a lower, endless press belt guided over the deflection drums, with pressure chambers which move up and down Pressure plates and from the inside of the press belts, on the other hand, are limited by a sliding surface seal, which in turn has a body facing the pressure plate, which is arranged in grooves running around the edge of the pressure plates, displaceable perpendicular to the inside of the press belts and with a force against the inside of the respective press belt, and with a fluid pressure medium in the pressure chambers to generate a pressure on the press belts.
  • Double belt presses of this type are known from DE-A1-2421 296 and are used to produce endless, web-shaped materials, for example layer materials, chipboard, fiberboard, electrical laminates and the like.
  • These sliding surface seals are designed as one-piece, rectangular sealing strips, the body of which is arranged with the part facing the pressure plate in circumferential grooves on the edge of the pressure plate.
  • elastomers or plastics are used as sealing materials, which are resistant up to about 200 ° C.
  • a sealing element For use in generators for gas turbine engines made of ceramic material, a sealing element has become known from DE-A1-1 700 136, which has a base made of steel, on the surface of which an intermediate layer made of nickel-aluminum or nickel-chromium is applied. On this intermediate layer there is a surface layer made of nickel oxide, calcium fluoride and calcium oxide. Due to the materials used, this sealing element has good strength, so that tensile and shear stresses can be absorbed, and good thermal conductivity. On the other hand, however, these materials do not have a low coefficient of friction on contact with the metals that make up the press belts. Furthermore, the materials for the sealing element show a low wear resistance and thus a large abrasion with sliding contact with the press belt. Such a sealing element is therefore not suitable for use as a sliding surface seal in a double belt press.
  • the body of the sliding surface seal is made of metal, with the body a dry sliding layer facing the inside of the press belt is connected, which touches the inside of the pressing belt and a support layer is arranged between the body and the dry sliding layer, the carrier layer made of a steel band with a porous sintered tin bronze, the pores of which are filled with a mixture of polytetrafluoroethylene and lead forming the dry sliding layer, or wherein the carrier layer consists of a steel tape onto which a copper-powder-metallurgically obtained copper alloy forming the dry sliding layer is applied as a metal matrix and into the pores of this matrix Graphite is embedded.
  • FIG. 1 In the double belt press shown schematically in FIG. 1, which is used, for example, for the continuous production of laminates, four deflection drums 1, 2, 3 and 4 are rotatably supported on both sides in bearing bridges 5, 6. To two of these drums an endless press belt 7 and 8 is routed, which usually consists of high tensile steel band. The direction of rotation is indicated in the deflection drums 1 and 4 by arrows. A reaction zone 9 is formed between the mutually adjacent outer sides of the press belts 7, 8, in which a material web 10 advancing from right to left in FIG. 1 is continuously treated.
  • the material web 10 can, for example, consist of laminates impregnated with synthetic resin, fiber-binder mixtures or the like, which are to be compressed using heat and pressure at the same time. Compression without exposure to heat or with hypothermia is also possible.
  • the pressure exerted on the material web 10 is applied hydraulically to the adjacent inner sides of the press belts 7, 8 via pressure plates 11, 12 and transmitted from there to the material web 10.
  • the reaction forces exerted by the material web are transmitted via the pressure plates 11, 12 and via support supports connected to them into the press frame (only indicated schematically).
  • the deflection drums 1, 4 arranged on the inlet side are heated and heat the press belts 7, 8.
  • the amount of heat absorbed is transported from the belts into the reaction zone 9 and released there to the material web 10, where it is used, for example, for curing synthetic resin with which the material web is soaked.
  • a pressurizable, fluid pressure medium is introduced into the space between the pressure plates 11, 12 and the relevant inner sides of the adjacent press belt run 7 or 8. To the sides, this space, which forms the so-called pressure chamber, is limited by sliding surface seals.
  • a synthetic oil can be used as the pressure medium, which withstands the operating conditions of temperature and pressure prevailing in the double belt press.
  • a gas for example compressed air, can also be used.
  • FIG. 2 shows the edge region of the pressure chamber corresponding to region A in FIG. 1 with the sealing arrangement delimiting the chamber in the forward direction of the material web 10.
  • a groove 15 running parallel to the edge is formed, in which a sliding surface seal is arranged displaceably perpendicular to the inside of the pressure belt 7 facing the pressure plate 11, the sealing surface altogether with the Reference numeral 16 is provided.
  • the pressure prevailing in the pressure chamber 17 between the pressure plate 11, the press belt 7 and the sliding surface seal 16 keeps the sliding surface seal 16 slidably in contact with the inner wall of the groove 15 on the left in FIG. 2.
  • a bore 18 opens into the groove base through which a pressure medium exerts an elastic pressure Can act O-ring 19, which rests on the sliding surface seal 16.
  • the resulting pressure presses the 0-ring 19 against the seal 16 and this in turn against the press belt 7, as a result of which the pressure chamber 17 is delimited from the atmospheric side of the arrangement (on the left in FIG. 2).
  • the seal 16 can also be pressed against the press belt 7 by other means, for example with the aid of a spring.
  • the groove 15 extends around the pressure plate 11 parallel to the edges thereof.
  • the sliding surface seal 16 is designed as a self-contained frame structure lying below the O-ring.
  • the sliding surface seal 16 which is fixed in the groove 15 in the longitudinal direction, that is to say the direction of advance B, touches the inside of the press belt 7, which moves under the seal at a feed rate.
  • the relative movement between the press belt 7 and the sliding surface seal 16 results a frictional force that is proportional to the contact pressure and the sliding friction coefficient. This frictional force must be able to be absorbed by the material of the seal 16 without the seal being deformed inadmissibly, because otherwise it could not perform its sealing function.
  • FIG. 2 shows the structure of a first embodiment of a sliding surface seal according to the invention.
  • a body 21 of the seal 16 consists of a metallic material, in particular a high-tensile steel grade.
  • the cross section of the body 21 is essentially rectangular with an integrally formed foot 22.
  • a sliding surface designed as a sliding cap 23 is arranged and firmly connected to the foot.
  • the sliding cap 23 consists of a composite material, which in turn comprises a dry sliding layer 24 and a carrier layer 25.
  • a composite material whose carrier layer 25 consists of a galvanically copper-plated steel strip is particularly advantageous for the production of the sliding cap.
  • Tin bronze is porous sintered onto the tape, the pores of which are filled in a rolling and sintering process with a mixture of polytetrafluoroethylene and lead, so that a coherent cover layer of polytetrafluoroethylene and lead results. Due to the friction-reducing properties of the polytetrafluoroethylene / lead mixture, this applied top layer acts as a dry sliding layer 24, the sintered structure of the tin bronze layer serving as reinforcement for this sliding layer.
  • Another suitable material for the sliding cap 23 is a composite material, which consists of a steel back, on which a copper alloy obtained by powder metallurgy is applied as a metal matrix. Graphite, which serves as a dry lubricant, is embedded in the pores of this metal matrix.
  • an indentation 26 is provided on the transition from the body 21 to the foot 22 on both edges.
  • the sliding cap 23 is placed with the carrier layer 25 on the foot 22 such that the dry sliding layer 24 faces the inner surface of the press belt 7 and the ends of the sliding cap are pulled up to the indentations 26.
  • the sliding cap is firmly anchored to the foot 22, for example by plastic deformation. Additional undercuts can be provided on the indentations 26 to support this anchoring.
  • the sliding surface seal 20 also comprises a body 21 made of metal, for example a high-tensile steel grade.
  • the body 21 has a rectangular cross section, a sliding cap 27 being applied on the side facing the press belt 7 in such a way that its carrier layer 25 bearing the dry sliding layer 24 lies flat against the body 21.
  • the carrier layer 25 is welded to the body 21 at its two edges, for example by YAG laser welding. The welding can also be replaced by brazing.
  • the friction forces occurring on the sliding surface seal 16 or 20 during operation of the double belt press are absorbed by the body 21. Since this consists of metal, which has a modulus of elasticity that is orders of magnitude higher than that of an elastomeric, thermosetting or thermoplastic material, there is practically no deformation due to the frictional forces.
  • the sealing function is maintained as desired. Since both the body 21 and its reinforcement formed by the sliding cap 23 and 27 in the dry sliding layer 24 have a metallic thermal conductivity, the heat generated by the friction of the seal on the belt surface is dissipated into the pressure plate 11, with which the sliding surface seal due to the Has overpressure in the pressure chamber 17 tight, metallic contact (Fig. 2). There is thus no partial overheating in the material web 10, which could lead to over-hardening.
  • two sliding surface seals 16 can be arranged next to one another and at a mutual distance, as shown in FIG. 4.
  • the pressure chamber 30 is delimited at the top by the pressure plate 11, at the bottom by the press belt 7 and to the side by the sliding surface seal 16.
  • a further seal 16a is arranged in a groove 34 in the pressure plate 11, running parallel to the seal 16, so that a space 35 is formed between the two seals, in which leaked pressure medium collects.
  • This leaked pressure medium can be discharged through a bore 36 in the pressure plate 11.
  • the bore 36 can also be connected to a vacuum source.

Claims (8)

1. Presse à double ruban pour un gâteau de matière avançant en continu, comprenant un bâti de presse rigide, des cylindres de renvoi (1, 2, 3, 4) orientables sur des traverses (5, 6) du bâti de presse et une bande supérieure et une bande inférieure (7, 8) de pressage, les deux sans fin et défilant sur les cylindres de renvoi, comprenant ensuite des chambres hydrauliques (17) délimitées vers le haut et vers le bas par des plaques d'appui (11, 12) et les faces intérieures des bandes de pressage, latéralement délimitées cependant par un joint à glissement (16) avec l'élément (21) orienté vers la plaque d'appui, disposé dans des rainures (15) sur le bord des plaques d'appui de façon à pouvoir se déplacer perpendiculairement aux faces intérieures des bandes de pressage et soumis à une force d'appui contre la face intérieure de la bande correspondante de pressage, comprenant enfin un agent fluide dans les chambres hydrauliques (17) pour exercer la force de pressage sur les bandes de pressage (7, 6), caractérisée en ce que ledit élément (21) du joint à glissement (16. 20) est métallique, que ledit élément (21) est relié à une couche de glissement à sec (24) orientée vers la face intérieure de la bande de pressage (7, 8) et glissant, en contact direct, sur ladite face intérieure de la bande de pressage (7, 8), et qu'entre ledit élément (21) et ladite couche de glissement à sec (24) est disposée une couche porteuse (25) sous forme d'une bande en acier recouverte d'un bronze ordinaire poreux et fritté dont les bords sont remplis d'un mélange de polytétraflouréthylène et de plomb et qui forme ladite couche de glissement à sec (24).
2. Presse à double ruban pour un gâteau de matière avançant en continu, comprenant un bâti de presse rigide, des cylindres de renvoi (1, 2, 3, 4) orientables sur des traverses (5, 6) du bâti de presse et une bande supérieure et une bande inférieure (7, 8) de pressage, les deux sans fin et défilant sur les cylindres de renvoi, comprenant ensuite des chambres hydrauliques (17) délimitées vers le haut et vers le bas par des plaques d'appui (11, 12) et les faces intérieures des bandes de pressage, latéralement délimitées cependant par un joint à glissement (16) avec l'élément (21) orienté vers la plaque d'appui, disposé dans des rainures (15) sur le bord des plaques d'appui de façon à pouvoir se déplacer perpendiculairement aux faces intérieures des bandes de pressage et soumis à une force d'appui contre la face intérieure de la bande correspondante de pressage, comprenant enfin un agent fluide dans les chambres hydrauliques (17) pour exercer la force de pressage sur les bandes de pressage (7, 6), caractérisée en ce que ledit élément (21) du joint à glissement (16, 20) est métallique, que ledit élément (21) est relié à une couche de glissement à sec (24) orientée vers la face intérieure de la bande de pressage (7, 8) et glissant, en contact direct, sur ladite face intérieure de la bande de pressage (7, 8), et qu'entre ledit élément (21) et ladite couche de glissement à sec (24) est disposée une couche porteuse (25) sous forme d'une bande en acier recouverte d'une matrice métallique sous forme d'un alliage de cuivre produit par métallurgie des poudres, dont les pores sont remplis de graphique et qui forment ladite couche de glissement à sec (24).
3. Presse à double ruban suivant les revendications 1 ou 2, caractérisée en ce que ledit élément (21) du joint à glissement (16, 20) est en acier.
4. Presse à double ruban suivant l'une des revendications 1 à 3, caractérisée en ce que ledit élément (21) du joint à glissement (16, 20) présente une section rectangulaire.
5. Presse à double ruban suivant la revendication 4, caractérisée en ce que ledit élément (21) du joint à glissement (16, 20) présente un détail formant un pied (22) avec des encoches (26) entre le pied et ledit élément et que le pied (22) est recouvert d'un capuchon de glissement (23) comprenant ladite couche de glissement à sec (24) et dont les bords remontent jusqu'aux encoches (26) et sont solidement fixés sur ledit pied par fermage mécanique.
6. Presse à double ruban suivant la revendication 4, caractérisée en ce que les couches de glissement à sec et porteuse (24, 25) ont une section rectangulaire et que la couche porteuse (25) est rendue solidaire des bords dudit élément (21) par soudage haute température ou à l'étain.
7. Presse à double ruban suivant l'une des revendications 1 à 6, caractérisée en ce que un deuxième joint à glissement (16a) est disposé, du côté atmosphérique, à côté d'un premier joint à glissement (16), et à une certaine distance de celui-ci, et que l'espace (35) entre les deux joints peut recevoir les fuites de l'agent fluide de la chambre hydraulique (30), à évacuer par aspiration par un perçage (36).
8. Presse à double ruban suivant la revendication 7, caractérisée en ce que le perçage (36) est relié à une source de dépression.
EP85115387A 1984-12-14 1985-12-04 Presse à double ruban pour un gâteau de matière avançant en continu Expired EP0184767B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843445636 DE3445636A1 (de) 1984-12-14 1984-12-14 Doppelbandpresse fuer eine kontinuierlich vorlaufende werkstoffbahn
DE3445636 1984-12-14

Publications (2)

Publication Number Publication Date
EP0184767A1 EP0184767A1 (fr) 1986-06-18
EP0184767B1 true EP0184767B1 (fr) 1988-04-27

Family

ID=6252779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115387A Expired EP0184767B1 (fr) 1984-12-14 1985-12-04 Presse à double ruban pour un gâteau de matière avançant en continu

Country Status (6)

Country Link
US (1) US4711168A (fr)
EP (1) EP0184767B1 (fr)
JP (1) JPS61144298A (fr)
CN (1) CN85108832B (fr)
DE (1) DE3445636A1 (fr)
RU (1) RU2071422C1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63136921U (fr) * 1987-03-02 1988-09-08
US4992133A (en) * 1988-09-30 1991-02-12 Pda Engineering Apparatus for processing composite materials
US5386769A (en) * 1989-10-03 1995-02-07 Rinne; Erkki Adjustable press roller using silicone elastomer as pressure medium
US5071139A (en) * 1989-12-27 1991-12-10 A.W. Chesterton Company Pressure activated emergency/temporary seal
DE4111022A1 (de) * 1991-04-05 1992-10-08 Hymmen Theodor Gmbh Vorrichtung zum aufbringen einer flaechenpressung auf fortschreitende werkstuecke
DE4219996C2 (de) * 1992-06-19 1996-04-11 Hymmen Theodor Gmbh Kontinuierlich arbeitende Presse mit einer mit einem fluiden Druckmittel beaufschlagten Druckkammer
US6340160B1 (en) 1997-09-30 2002-01-22 Gilbert W. Younger System for sealing relatively movable elements
US6908295B2 (en) * 2000-06-16 2005-06-21 Avery Dennison Corporation Process and apparatus for embossing precise microstructures and embossing tool for making same
US20030206256A1 (en) * 2002-05-06 2003-11-06 Drain Kieran F. Display device with backlight
DE112007003416B4 (de) * 2007-04-05 2021-03-18 Xylo Technologies Ag Verbindung von Teilplatten von Abrollplatten in einer kontinuierlichen Presse
CN101524897B (zh) * 2008-03-05 2011-04-20 北京化工大学 一种连续胶带平板压机的压板
DE102016102931B4 (de) * 2016-02-19 2018-09-20 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung und Verfahren zur Überwachung und/oder Regelung eines Schmierzustandes in einer kontinuierlich arbeitenden Presse
IT201600091618A1 (it) * 2016-09-12 2018-03-12 Sacmi Dispositivo per la compattazione di materiale in polvere, in particolare materiale ceramico

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US684617A (en) * 1901-07-17 1901-10-15 Edward Rathbun Packing-ring for steam-engines.
DE565642C (de) * 1931-04-12 1932-12-05 Stromeier & Co G Dichtungsring, insbesondere fuer UEberhitzerelemente, der aus Aluminium und einem haerteren Metall besteht
US2135763A (en) * 1935-11-13 1938-11-08 Frederick A Nicholson Endless traveling platen fluid pressure press
US3481715A (en) * 1967-02-03 1969-12-02 Ford Motor Co Sealing member for high temperature applications and a process of producing the same
CH495209A (fr) * 1968-07-12 1970-08-31 Sandco Ltd Presse pour la fabrication ou le traitement, en continu d'un produit en plaque ou en feuille
US3615099A (en) * 1969-02-26 1971-10-26 Ramsey Corp Multiple layer faced piston rings
DE1953816A1 (de) * 1969-10-25 1971-07-01 Hwm Weh Maschf Hermann Verfahren und Einrichtung zur Herstellung von ein- und mehrschichtigen Spanplatten und zu deren Beschichtung
DE2421296A1 (de) * 1974-05-02 1975-11-13 Held Kg Adolf Verfahren und vorrichtung zum herstellen von endloslaminaten
DE2722197C2 (de) * 1977-05-17 1979-06-07 Kurt 7218 Trossingen Held Gleitflächendichtung an kontinuierlichen Laminiermaschinen
DE2953078C2 (de) * 1979-02-23 1983-02-03 Kurt 7218 Trossingen Held Gleitflächendichtung an einer Laminiermaschine
DE2907087C3 (de) * 1979-02-23 1981-10-15 Held, Kurt, 7218 Trossingen Gleitflächendichtung an einer kontinuierlichen Laminiermaschine
DE3013231A1 (de) * 1980-04-03 1981-10-15 De Mets N.V., 8701 Izegem Herstellen und/oder beschichten u.dgl. einer ein- oder mehrlegigen plattenbahn
DE3126969A1 (de) * 1981-07-08 1983-01-27 Santrade Ltd., 6002 Luzern Gleitflaechendichtung fuer doppelbandpressen
DE3325578C2 (de) * 1983-07-15 1985-11-14 Held, Kurt, 7218 Trossingen Doppelbandpresse zur kontinuierlichen Herstellung von Laminaten

Also Published As

Publication number Publication date
DE3445636C2 (fr) 1993-05-19
DE3445636A1 (de) 1986-06-19
CN85108832B (zh) 1988-11-02
JPH0242316B2 (fr) 1990-09-21
JPS61144298A (ja) 1986-07-01
EP0184767A1 (fr) 1986-06-18
RU2071422C1 (ru) 1997-01-10
CN85108832A (zh) 1986-06-10
US4711168A (en) 1987-12-08

Similar Documents

Publication Publication Date Title
EP0184767B1 (fr) Presse à double ruban pour un gâteau de matière avançant en continu
DE3534478C2 (de) Doppelbandpresse zum kontinuierlichen Verpressen von Werkstoffbahnen bei erhöhten Temperaturen
DE2722197C2 (de) Gleitflächendichtung an kontinuierlichen Laminiermaschinen
EP0529214B1 (fr) Presse à doubles bandes
DE2421296A1 (de) Verfahren und vorrichtung zum herstellen von endloslaminaten
DE3616619C2 (de) Dichtungsanordnung an einer Doppelbandpresse und Verfahren zur Herstellung der zugehörigen Dichtungskörper
EP0176883B2 (fr) Jointure de glissière double d'une presse à bandes doubles
EP0140039A1 (fr) Presse à action continue pour presser un matériau en continu
DE4041850A1 (de) Kontinuierlich arbeitende doppelbandpresse
DE3048984C2 (de) Zahnradmaschine
DE3442463A1 (de) Dichtungsring
DE3134015C2 (de) Flachdichtung sowie Verfahren zu ihrer Herstellung
WO1999064164A1 (fr) Soupape de limitation de debit commandee a precontrainte, en particulier soupape de vaporisation, et barre de vaporisation
DE102018118212B3 (de) Gleitflächendichtung für eine kontinuierlich arbeitende Doppelbandpresse und Doppelbandpresse
DE4111022C2 (fr)
DE102005055855B4 (de) Druckzone einer Doppelbandpresse
EP0196500B1 (fr) Garniture de presse-étoupe pour haute pression et température
DE10246872A1 (de) Beschichtungspresse flächiger Werkstücke
EP1079157B1 (fr) Garniture mécanique d'étanchéité
DE2815021C2 (de) Kipplager für schwere Bauwerke
DE202015102400U1 (de) Kontinuierlich arbeitende Presse
DE3200377C2 (de) Gleitringdichtung
EP1735551A1 (fr) Dispositif d'etancheification, en particulier pour dispositif de sechage
DE1239148B (de) Radialdichtung fuer Rotationskolbenmaschinen
DE2419564A1 (de) Oeldichtung fuer eine drehkolbenmaschine

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: A1

Designated state(s): GB IT

17P Request for examination filed

Effective date: 19860709

17Q First examination report despatched

Effective date: 19870604

ITF It: translation for a ep patent filed

Owner name: ING. ZINI MARANESI & C. S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): GB IT

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
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
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960126

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: 19961204

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

Effective date: 19961204