EP0208274B2 - Verfahren und Vorrichtung zum Spinnen eines Garnes nach dem Offenend-Friktions-Spinnprinzip - Google Patents

Verfahren und Vorrichtung zum Spinnen eines Garnes nach dem Offenend-Friktions-Spinnprinzip Download PDF

Info

Publication number
EP0208274B2
EP0208274B2 EP86109126A EP86109126A EP0208274B2 EP 0208274 B2 EP0208274 B2 EP 0208274B2 EP 86109126 A EP86109126 A EP 86109126A EP 86109126 A EP86109126 A EP 86109126A EP 0208274 B2 EP0208274 B2 EP 0208274B2
Authority
EP
European Patent Office
Prior art keywords
speed
conveying
angle
mouth
fibre
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
EP86109126A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0208274B1 (de
EP0208274A1 (de
Inventor
Herbert Stalder
Josef Baumgartner
Arthur Würmli
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4246852&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0208274(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0208274A1 publication Critical patent/EP0208274A1/de
Publication of EP0208274B1 publication Critical patent/EP0208274B1/de
Application granted granted Critical
Publication of EP0208274B2 publication Critical patent/EP0208274B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/06—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface co-operating with suction means
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/16—Friction spinning, i.e. the running surface being provided by a pair of closely spaced friction drums, e.g. at least one suction drum
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/16—Friction spinning, i.e. the running surface being provided by a pair of closely spaced friction drums, e.g. at least one suction drum
    • D01H4/18—Friction drums, e.g. arrangement of suction holes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/38—Channels for feeding fibres to the yarn forming region

Definitions

  • the invention relates to a method and a device for spinning a yarn or the like, according to the open-end friction spinning principle, as in the preamble of the first method or. of the first device claim is defined.
  • the disadvantage of such obstacles is primarily the risk that at least temporarily larger fiber accumulations form at the obstacles, which can be conveyed as a whole and delivered to the end of the yarn, which leads to unusable nits in the yarn.
  • the other danger is the possibility of at least partial blockage of the delivery channel.
  • the fiber feed channel lies essentially in a plane that is laid through the gusset gap and perpendicular to the axes of the rollers.
  • the fiber conveying channel is at an acute angle and is inclined at an angle of approximately 30 ° against the direction in which the yarn is drawn off.
  • the disadvantage of this device is that the fibers, after they have been gripped in the stretched position with their front end by the yarn end, are deflected at a pull-off speed of the yarn that is relatively low in relation to the fiber conveying speed in the channel, so that the subsequent part of a fiber is only partially is deflected like a whip, while the remaining part of this fiber is compressed in the gusset gap.
  • the invention is therefore based on the object of delivering the fibers to the friction spinning agent in a substantially stretched position without the risk of clogging and compression.
  • the object is achieved by the features contained in the first method claim and in the first device claim.
  • Fig. 1 shows a hint of an opening roller 1 known from the rotor open-end spinning process, which is mounted in a manner known per se in a housing 2 (only partially shown) and can be driven.
  • the opening roller 1 is provided in a manner known per se (and therefore not described further) for opening a fiber sliver (not shown) into individual fibers 3, with needles 4 or teeth (not shown).
  • the housing 2 is connected to a fiber conveying channel 5 which opens close to the cylindrical surface of a perforated (see FIG. 5) friction spinning drum 6.
  • This friction spinning drum 6 has a suction channel 7 inside (FIG. 5), which delimits a suction zone R on the circumference of the friction spinning drum 6 through its walls 8 and 9.
  • the walls 8 and 9 extend so close to the cylindrical inner wall 10 of the friction spinning drum 6 that, without touching the inner wall 10, an inflow of false air between the walls 8 and 9 and the inner wall 10 is practically prevented.
  • This air which is sucked in by the suction channel 7 and also flows through the fiber conveying channel 5, causes the fibers 3 detached from the needles 4 and exposed in the conveying channel 5 within the aforementioned suction zone R at a surface area delimited by the outlet mouth 11 - also called the mouth 11 - of the conveying channel 5 Q of the rotating friction spinning drum 6, as described later, is held and ultimately turned into a yarn 12 at a yarn formation point 13.
  • This yarn formation point 13 is located in the region of an imaginary continuation of the wall 9 of the suction channel 7 through the cylindrical wall of the friction spinning drum 6, i.e. in the boundary area given by the wall 9 within the suction zone R.
  • the friction spinning drum 6 rotates in a direction indicated by the arrow U and thereby transports the fibers released in the surface area Q to the friction spinning drum 6 to the yarn formation point 13.
  • the finished yarn 12 is drawn off in a draw-off direction A by a pair of draw-off rollers 14.
  • the length (not shown) of the suction zone R corresponds at least to the length L (FIG. 2) of the mouth 11.
  • the length L and the clear width D.3 (FIGS. 2, 4 and 5) of the mouth 11 result in the mouth cross-section, whereby basically the mouth cross-section is to be understood as the outlet cross-section of the fiber conveying channel.
  • Fig. 1 further shows the fiber feed channel 5 with an inclination marked with an acute angle ⁇ .
  • the angle of inclination ⁇ is formed by an imaginary extension of the mouth 11 and a lower wall 16 (as viewed in the direction seen in FIG. 1) of the channel 5.
  • the mouth 11 is provided substantially parallel and at a predetermined distance a from the yarn formation point 13.
  • the air flow in the channel also has an at least similar inclination to the mouth cross section.
  • FIG. 1 shows that the fiber conveyor channel in the mouth region has a strongly tapered part with the height M, which, as shown in FIGS. 2 and 5, tapers from the channel width D. 2 to the channel width D.3.
  • the preceding part of the fiber conveyor channel 5 is also, but significantly less, tapered, which is shown with the channel width D.1 to width D.2 in FIG. 2.
  • the fibers detached from the needles 4 of the opening roller 1 from the sliver are detected by the air flow Z, which will pass the needles later substantially and tangentially to the opening roller 1, and conveyed further as free-flying fibers 3 in the fiber feed channel 5.
  • the air flow in the fiber feed channel is denoted by S.
  • This air flow S is accelerated in the tapered mouth region with the height M, corresponding to the change in cross-section, given by the change in the inside width of the fiber conveying channel 5 from D.2 to D.3, and is then taken up by the suction channel 7 through the perforated friction spinning drum 6.
  • the air flow S is deflected towards the surface of the perforated friction spinning drum 6, as is indicated by the bow S.1 of the arrow S, so that the front part, viewed in the direction of flow, of a fiber 3 delivered in the direction of flow therein Acceleration zone also deflected according to the air flow S, then captured by the friction spinning drum, which is shown with the fiber layer 3.1, and is pulled off in the circumferential direction of the friction spinning drum 6.
  • the rear part of this fiber is conveyed further in the air flow in the direction of arrow N (FIG. 1), in order to ultimately be released to the surface of the friction spinning drum 6 in a fiber layer marked 3.2.
  • the size of the angle ⁇ (FIG.
  • the angle ⁇ is smaller, as the angle ⁇ becomes smaller, provided that the stated ratio between air speed and peripheral speed of the friction spinning drum 6 is sufficiently large, the height M is adapted to the inclination of the fiber feed channel and the acceleration in the mentioned mouth area is sufficiently large to allow this to deflect said front end of the respective fiber sufficiently quickly against the friction spinning drum surface.
  • the angle ⁇ becomes smaller, the ratio between the air speed and the peripheral speed of the friction spinning drum has to be greater and the acceleration in the mouth region mentioned has to be increased as a result of the smaller selected height M.
  • the speed of the conveying air in the mouth is at least 50% higher than the speed at the beginning of the range mentioned, i.e. must be D.2 in order to achieve a sufficiently effective deflection of a front fiber end.
  • the tapered area in front of the mouth should not be higher than that the front end of a fiber covered by this area is a maximum of a third of the length of a medium fiber to be processed.
  • the height M This taper should therefore be chosen between 5 and 15 millimeters.
  • the speed of the conveying air in the mouth 11 is not more than five times the speed in the channel width D.2, i.e. should be at the beginning of this area.
  • the speed of the conveying air in the mouth 11 is between twice and four times the speed in the channel width D.2.
  • the speed of the air flow above the said tapered area is greater than the speed of movement of the friction spinning means in order to avoid that fibers essentially in the direction of movement of the friction spinning means, i.e. with a friction spinning drum in the circumferential direction and with a friction spinning disc in the direction of rotation.
  • the speed of the conveying air flow above the tapered area with decreasing angle of inclination ⁇ of the fiber conveying channel 5, respectively. 5.1 must be larger in order to bring the fiber into the fiber layer 3.2 with the desired angle ⁇ .
  • the air speed mentioned should be between 15 m / sec. and 100 m / sec. be.
  • the angle of inclination ⁇ of the fibers 3 in the fiber layer 3.2 is also reduced if the speed of the air flow mentioned above the tapered area increases while the speed of movement of the friction spinning means remains the same. At a minimum, the air flow mentioned must be twice as high as the speed of movement of the friction spin material.
  • the angle ⁇ which characterizes the tapering of the area mentioned should be selected between 20 and 50 degrees, preferably between 30 and 40 degrees, in order to obtain the desired fiber deposition effect without excessive flow losses.
  • the arrangement of the holes 52 resulting in the perforation of the surface of the friction spinning means - in this case, the friction spinning drum 6 - should be selected such that those connecting lines 50 or. 51 of the hole centers, which assume a position inclined at angles ⁇ .1 and ⁇ .2 to the yarn formation point 13, form an acute angle.
  • the larger angle ⁇ .2 should not be greater than 80 and the small angle ⁇ .1 should not be less than 5 °.
  • the small angle ⁇ .1 between 10 and 30 ° should preferably be chosen, since most fibers attach to these fiber orientation angles ⁇ .
  • the connecting lines 50, respectively. 51 compared to the delivery channel 5 respectively. 5.1 provided opposite to the yarn formation point 13 inclined.
  • the rows of holes are correspondingly arranged such that the straight lines (50, 51) connecting the hole centers are neither parallel to the yarn formation point 13 nor at a right angle are provided.
  • the friction spinning device of FIGS. 3 and 4 differs from that of FIGS. 1 and 2 essentially by the position of the opening roller 1 relative to the position of the mouth 11, and by the essentially parallel course of the channel widths D.1 and D.2 Channel walls 18 and 19 of the fiber feed channel 5.1. Accordingly, the elements having the same functions as those of the device of Figs. 1 and 2 are given the same reference numerals.
  • the fiber conveying channel 5.1 of the device in FIGS. 3 and 4 has in principle the same function as the fiber conveying channel 5 of the device in FIGS. 1 and 2, but with 5.1 since the walls 18 and 19 run essentially parallel.
  • the channel width D.1 corresponds to the width (not shown) of the opening roller 1
  • the channel width D.1 of the fiber conveying channel 5.1 of the device of FIGS. 3 and 4 is selected independently of the width of the opening roller 1 can be, since in this variant the width mentioned gives the width T of the conveyor channel 5.1.
  • a suction channel 32 the suction opening of which is shown in broken lines in FIG. 8, has the same function as the previously mentioned suction channel 7.
  • the fiber feed channel can be provided either in the manner shown in FIGS. 1 and 2 or in the manner shown in FIGS. 3 and 4.
  • the holes 52 resulting in the perforation are arranged such that at least two of the straight lines connecting the rows of holes form an acute angle with the yarn formation point 13. These lines are marked with the reference numerals 53 and 54 and the associated angles with ⁇ .1 resp. marked ⁇ .2. It goes without saying that since it is a friction spinning disc and not a friction spinning drum, the hole arrangement must be provided in segments, as shown in FIG. 10.
  • the air flow Z mentioned earlier is guided in an air inlet duct 100 that runs tangentially to the opening roller 1. As shown in FIG. 1, this air inlet duct 100 opens straight into the fiber feed duct 5. However, it is also possible to provide this air inlet duct in a shape angled to the fiber feed duct 5; it is essential that this duct is designed such that the air flow Z in able to take over the fibers from the opening roller 1 and transfer them to the fiber feed channel.
  • the provision of the aforementioned air inlet duct 100 is not restricted to use in a device according to FIG. 1, but is possible in an analogous manner in all of the fiber conveying ducts shown.
  • the advantage of such an air inlet duct 100 and thus of an air flow Z is the possibility in a simple manner to obtain the amount of air necessary for the conveying speed of the fibers in the fiber conveying duct, and also that the air passing by the opening roller 1 can thus be provided at a speed. which is at least equal to or greater than the peripheral speed of the outermost diameter of the opening roller, so that the air flow Z exerts a stretching effect on the fibers to be taken over by the opening roller.
  • the fibers supplied to the acceleration zone in the mouth area have already undergone stretching, so that essentially stretched fibers can be added to the fiber layer 3.2.
  • the air flow S can experience a further acceleration between the opening roller and the acceleration area in the mouth, so that the fibers guided in the fiber feed channel at their front end, as seen in the conveying direction, also have a higher acceleration Experience the speed of the ambient air as its rear part, which also contributes to further stretching or at least to prevent curling of the fibers.
  • the air speed in the fiber feed channel can be selected in such a way that a desired dilution of the fiber flow in the fiber feed channel can be achieved, which is useful for the previously mentioned “rollover” of the fiber, since this Rollover effect becomes more effective with a decreasing number of fibers in the cross section of the fiber stream.
  • the amount of air is changed by changing the cross section of the air inlet channel 100 and / or by changing the negative pressure in the fiber feed channel 5. 5.1 changed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP86109126A 1985-07-12 1986-07-04 Verfahren und Vorrichtung zum Spinnen eines Garnes nach dem Offenend-Friktions-Spinnprinzip Expired - Lifetime EP0208274B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH302185 1985-07-12
CH3021/85 1985-07-12

Publications (3)

Publication Number Publication Date
EP0208274A1 EP0208274A1 (de) 1987-01-14
EP0208274B1 EP0208274B1 (de) 1988-12-28
EP0208274B2 true EP0208274B2 (de) 1992-02-05

Family

ID=4246852

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109126A Expired - Lifetime EP0208274B2 (de) 1985-07-12 1986-07-04 Verfahren und Vorrichtung zum Spinnen eines Garnes nach dem Offenend-Friktions-Spinnprinzip

Country Status (5)

Country Link
US (1) US4640089A (enrdf_load_stackoverflow)
EP (1) EP0208274B2 (enrdf_load_stackoverflow)
JP (1) JPS6215332A (enrdf_load_stackoverflow)
DE (1) DE3661549D1 (enrdf_load_stackoverflow)
IN (1) IN167316B (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3629498A1 (de) * 1986-08-29 1988-03-10 Brockmanns Karl Josef Dr Ing Friktionsspinnvorrichtung
FR2635339A1 (fr) * 1988-08-09 1990-02-16 Laval Patrice Procede de filature du type a bouts liberes, et dispositif pour mettre en oeuvre ce procede
DE3832110A1 (de) * 1988-09-21 1990-03-29 Rieter Ag Maschf Friktionsspinnvorrichtung
GB8827367D0 (en) * 1988-11-23 1988-12-29 Lawrence C A Spinning of yarn
CH681729A5 (enrdf_load_stackoverflow) * 1990-07-13 1993-05-14 Rieter Ag Maschf

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1231198A (enrdf_load_stackoverflow) * 1967-09-11 1971-05-12
AT339779B (de) * 1976-04-08 1977-11-10 Fehrer Ernst Gmbh Vorrichtung zum spinnen textiler fasern
ATA170978A (de) * 1977-03-30 1990-09-15 Schlafhorst & Co W Verfahren und vorrichtung zum spinnen eines fadens aus einzelfasern
DE3300636A1 (de) * 1983-01-11 1984-07-12 Fritz 7347 Bad Überkingen Stahlecker Oe-friktionsspinnvorrichtung
DE3318924A1 (de) * 1983-05-25 1984-11-29 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionsspinnen
DE3323189A1 (de) * 1983-06-28 1985-01-10 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionspinnen
DE3323988A1 (de) * 1983-07-02 1985-01-03 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionsspinnen
DE3324001A1 (de) * 1983-07-02 1985-01-03 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionsspinnen
DE3335065A1 (de) * 1983-09-28 1985-04-04 Stahlecker, Fritz, 7347 Bad Überkingen Vorrichtung zum oe-friktionsspinnen
DE3336547A1 (de) * 1983-10-07 1985-04-18 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionsspinnen

Also Published As

Publication number Publication date
EP0208274B1 (de) 1988-12-28
US4640089A (en) 1987-02-03
JPH0235046B2 (enrdf_load_stackoverflow) 1990-08-08
EP0208274A1 (de) 1987-01-14
DE3661549D1 (en) 1989-02-02
IN167316B (enrdf_load_stackoverflow) 1990-10-06
JPS6215332A (ja) 1987-01-23

Similar Documents

Publication Publication Date Title
WO2002024993A2 (de) Spinnvorrichtung
EP0178466B1 (de) Verfahren und Vorrichtung zum Herstellen eines Garnes
EP1335050B1 (de) Textilverarbeitungsmaschine mit einem Faserförderkanal und einer Faserführungsfläche
EP0305971B1 (de) Verfahren und Vorrichtung zum Falschdrall-Spinnen
EP0175862B1 (de) Verfahren und Vorrichtung zur Herstellung eines Garnes
EP0208274B2 (de) Verfahren und Vorrichtung zum Spinnen eines Garnes nach dem Offenend-Friktions-Spinnprinzip
DE19610960A1 (de) Verfahren zum Offenend-Spinnen
CH681087A5 (enrdf_load_stackoverflow)
CH694332A5 (de) Verfahren und Vorrichtung zur Herstellung eines Garnes mit ringgarnähnlichem Charakter.
DE2718146A1 (de) Offen-end-spinnvorrichtung
EP0206198B1 (de) Friktionsspinnmittel für eine Friktionsspinn-Vorrichtung
CH623084A5 (enrdf_load_stackoverflow)
EP0222101B1 (de) Verfahren zum Anspinnen eines Garnes an einer Friktionsspinnvorrichtung
EP0236324B1 (de) Offenend-spinnverfahren und vorrichtung zu seiner durchführung
EP0363649B1 (de) Friktionsspinnvorrichtung
DE19632742A1 (de) Spinnverfahren zum Herstellen eines Garnes
EP0236323B1 (de) Offenend-spinnvorrichtung
EP0208114B1 (de) Verfahren und Vorrichtung zum Offenend-Friktionsspinnen
DE3422207C2 (enrdf_load_stackoverflow)
DE4007607A1 (de) Spinnverfahren und vorrichtung zur herstellung eines garnes
EP0289028B1 (de) Verfahren und Vorrichtung zum Anspinnen eines Garnes an einer Friktionsspinnvorrichtung
CH669403A5 (enrdf_load_stackoverflow)
DE3626723A1 (de) Friktionsspinnvorrichtung
AT393516B (de) Vorrichtung zum herstellen eines garnes
DE4239696A1 (de) Friktionsspinneinrichtung

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): CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19870226

17Q First examination report despatched

Effective date: 19880317

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI

REF Corresponds to:

Ref document number: 3661549

Country of ref document: DE

Date of ref document: 19890202

ITF It: translation for a ep patent filed
ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: W. SCHLAFHORST & CO.

Effective date: 19890928

Opponent name: WILHELM STAHLECKER GMBH

Effective date: 19890928

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

Ref country code: FR

Payment date: 19910614

Year of fee payment: 6

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

Ref country code: GB

Payment date: 19910617

Year of fee payment: 6

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 19920205

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): CH DE FR GB IT LI

REG Reference to a national code

Ref country code: CH

Ref legal event code: AEN

GBTA Gb: translation of amended ep patent filed (gb section 77(6)(b)/1977)
ITF It: translation for a ep patent filed
ET3 Fr: translation filed ** decision concerning opposition
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19920704

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

Effective date: 19920704

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

Ref country code: FR

Effective date: 19930331

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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: CH

Payment date: 19950614

Year of fee payment: 10

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

Ref country code: LI

Effective date: 19960731

Ref country code: CH

Effective date: 19960731

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: DE

Payment date: 20030710

Year of fee payment: 18

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: 20050201

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

Effective date: 20050704