CA2033324A1 - Apparatus for treating tows with a liquid - Google Patents
Apparatus for treating tows with a liquidInfo
- Publication number
- CA2033324A1 CA2033324A1 CA002033324A CA2033324A CA2033324A1 CA 2033324 A1 CA2033324 A1 CA 2033324A1 CA 002033324 A CA002033324 A CA 002033324A CA 2033324 A CA2033324 A CA 2033324A CA 2033324 A1 CA2033324 A1 CA 2033324A1
- Authority
- CA
- Canada
- Prior art keywords
- injector
- liquid
- tow
- injector unit
- nozzle
- 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
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/06—Washing or drying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/0005—Components or details
- B05B11/0089—Dispensing tubes
- B05B11/0091—Dispensing tubes movable, e.g. articulated on the sprayer
- B05B11/0094—Dispensing tubes movable, e.g. articulated on the sprayer movement of the dispensing tube controlling a valve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Artificial Filaments (AREA)
Abstract
Abstract A double injector is used for guidance and transport for the purpose of aftertreatment of freshly spun fibres in tow form by means of pipe washing. Said injector has the advantage that in a first step the tow is embedded at low pressure into the moving medium, and it is not until the second injector that the necessary amount of liquid under a higher pressure takes hold of the tow and moves it onwards. Fibre damage can be avoided in this way. (Fig. 1)
Description
1- 2~332~ ~
The invention relates to an apparatus for treat-ing tows with a liquid, the apparatu~ having a wash pipe and an in~ector, and to a proces~ for treating tows using such an apparatus.
5In order to completely remove impurities from fihres after spinning, it is necessary to sub~ect these fibres to an aftertreatment.
For thi~ purpose, the fibres may be cut and floated, and may be led as staple fi.bre web on screen 10bel~s through various bath sprinkling zones. In a gentler and more efficient variant of the aftertreatment, the continuous tow is guided through a closed pipe system through which an aftertreatment liquid is flushed. ~;~
By comparison with conven~ional aftertreatment, 15it is possible to bring the individual filaments after a short time into contact with large quantities of washing liqiuid, so that a good washout is effected. This sub-stantially higher ratio of washing liquid to fibre surface cannot be achieved with conventional screen belt 20and screen atertreatments.
Proce~ses of this type are described, for example in Swiss Patent Specification 273,357 and US Patent Specification 2,713,784. Special embodiments of the so- -called pipe wash, as described inter alia in 25"Chemiefasern nach dem Viskoseverfahren" (~'Synthetic fibres from the viscose process"), K. Goetze 3884/885 (1967), do without mechanical drawing-off aids, and flush the tow through the pipe system. In this case, injectors, which introduce the tow into the wash pipe and penetrate 30Lt and move it on with aftertreatment liquid, acquire an Lmportant ~ignificance.
In order to take up the fibre bundle in an appropriate fashion and to guarantee reliability of production, a ~et pressure of up to 3.0 bar is required 35at the injectors. In the case of ~ensitive fibres, for example fine fib~es or of those which contain modifying additives, such as carbon black, pigments or other inorganic particles, this ~hard ~et" causes fibre cracks.
In this zon~, fibre crack~ influence the further 2~332~
tr~atment, but also the product quality in a very negative fashion. As an example, mention may be made of the content of long fibres in the produc~lon of staple fibres: due to fibre cracks, tha fibres can no longer be S cut reliably, so that there are unde~irably long fibres in staple fibres which are to have besn cut to a specific length.
It is the ob~ect of the invention to overcome these disadvantages and to improve the apparatu~ of the type mentioned in the beginning so that a continuous tow can be introduced into a wash tube and floated there~
through, without causing fibre breaks or fibre cracks.
This ob~ect is achieved according ~o the invention in that the injector is constructed as a double in~ector consi~ting of an upper and a lower injector unit each having a hollow nozzle needle and a nozzle stock.
It is expedient if the internal diameter of the nozzle needle and of the nozzle stock in the upper and in the lower in~ector unit are each approxLmately the same, and if the internal dLameters of the lower in~ector unit are larger than the internal diameters of the upper injector unit. In this way, the lower injector unit has enough room for the tow to be surrounded by a suffici~
ently thick layer of liquid, and thereby protected.
Preferably, the ~et pressure of the upper and the jet pressure of ths lower in~ector unit are independently ad~ustable.
It is expediant if above each nozzle opening there i~ provided an annular chamber into which the feeds o~ movLng medium open.
When operating this apparatus it ~s expedient if the ~et pressure difference between the upper and lower ; in~ector unit is 0.5-2 bar, preferably approximately 1.0 bar, and if th2 ratio of the quantities of liquid that are supplied by the upper and lower injector unit lies between 1:1 and 1:5 and is preferably 1:3. It is possible to treat tows consisting of 6,000-5,000,000 individual filaments.
An illustrative embodiment of the invention will : ' .,.. .... - . .... ,.,.. , .. , , . . , .......... ~ .. , .. , . .~. ., .. ~. .. . .... .
.. : .
:::: :.. . ... . . .
_ 3 - 2~333~
be explained in more detail with reference to the figures, wherein Fig. 1 shows a double injector and how it can be u3ed according to the invention in an apparatus for treating tows; Fig. 2 shows a mod:ification thereof;
and Fig. 3 show~ the pressure relationships in the in~ector according to Fig. 1.
The double injector consis~s of a stationary central part 1, whose upper part forms the nozzle stock of the upper in~ector unit 2 and whose lower part represents the nozzle needle of the lower injector unit 3. A tubular upper part that can be moved by screwing i9 provided as the nozzle needle for the upper injector unit 2. The nozzle opening 4 can be adjusted by moving the upper part up and down. This part is widened in the form of a funnel at the uppermost end in order to take up and guide the tow 6. The lower in~ector unit consists of a liXewise movable, tubular blower part, whose uppermost part forms the nozzle stock.
The nozzle opening 5 of the lower injector unit is formed in common with the statLonary central part, which is constructed a~ the nozzle needle. The feeds 7 and 8 of moving medium open laterally above the nozzle openings 4 and 5 into annular chambers 9 and 10, before the medium comes into contact under pressure with the tow through th~ nozzle opening. The shape of the annular chamber 9 and }0 is designed such that no lateral over-pressure is produced.
By means of the upper in~ector unit, it i~
possible for the fibre bundle to be drawn very gently into the double in~ector with a ~et pressure that is reduced with respect to the lower in~ector unit, and with a part of the total wash liquid. In this process, the fibre bundlo i~ embedded in the wash liquid and is supplied to the lower in~ector~
The lower in~ector can be operated with a jet pressure that is increased by up to 2 bar with respect to the upper in~ector, and in this proc~ss the remaining amount of wash liquid is supplied.
The high ~et pressure now no longer reaches the -individual fibres t since the latter are surroun~aQ~y t~e liquid supplied in the first injector, and are thereby protected. ;~
Consequently, the desired, reliable introduction of the fibre bundle into the individual wash zones can take place in a gentle fashion.
In a ~pecial embodiment of the double injector, the funnel-shaped part, which introduces the tow into the double injector, can ~ additionally itted with drawing-in aids.
An exemplary embodiment of this type i8 represented in Fig. 2. 11 represents the inlet of the flush liquid, which passes via the annular chamber 12 and the overflow channels 13 into the nozzle annular ch mher 14, and immediately after emerging from the annular gap 15 takes hold of the tow and floats it onwards.
Upon changing the type of fibre in the tow, the nozzle cross-sections can be varied by displacing the nozzle needles in the nozzle stock, and consequently the flow conditions can be optimized, so that fibre breaks are excluded.
EXAMPLE 1:
A continuous tow of HWM fibresl consisting of 530,000 filaments of 1.7 dtex each is drawn off at a speed of 25 m/min and introduced into a pipe washing system by means of a double in~ector.
The ~et pressure in the upper in~ector is 0.5 bar. 1,000 l/h acid~lated water are pumped through.
The ~et pressure in the lower injector is 1.5 bar. The amount of Liquid is 3,000 l~h.
Fig. 3 illu~trates the fl~w conditions in the individual sections of the double injector. For this ; purpose, the latter i~ repre~ented once again at ths side.
:
1 Note: these fibres ara also known as modal fibre~. They have a high wet modulus, i.e. they do not -tear even in the wet state.
,',.: ... :... .. - .
: . . , :, . . ,: :
: :. .~ . . : . .
.... . . . . . .
2~3~2~
A squeeze roll which effect~ a bath separation is provided at the end of the first wash zone. The tow is introduced into the next treatment bath by a second double iniector.
EXA~PLE 2:
A continuou~ tow of viscose fibres which have incorporated graphite consi~ts of 31;2,000 filaments of 5.5 dtex each. It is drawn off at a speed of 25 m/min and introduced into a pipe washing system by means of a double injector.
The iet pressure in the upper in~ector i~ 0.5 bar. 2,000 1 acidulated waterthour are pumped through.
The jet pressure in the lower in~ector i~ 2.0 bar. The amount of liquid is 5,000 l/h.
EXAMRLE 3:
A continuou~ tow of cotton-type viscose fibres (ZS fibre production) consisting of 53,000 filaments of 1.3 dtex each i~ drawn off at a speed of 60 m/min and introduced into a pipe washing ~ystem by mean~ o~ a double injector.
The ~st pressure in the upper injector is 0.7 bar. 500 1 acidulated water/hour are pumped through.
The jet pressure in the lower in~ector is l.S
bar. The amount of liquid is 1200 l/h.
EXAMPLE 4: ;
A continuous tow of cellulosic fibres consisting of 10,000 filaments of 1.7 dtex each is drawn off at a speed of 60 m/min and introduced into a pipe washing sy3tem by means of a double iniector.
The ~et pres~ure in the uppar injector is 0.5 bar. 500 l wa~hing water/hour are pumped through.
The ~et pre~sure in the lower iniector is 1.O bar. The amount of liquid i~ 5,000 l/h.
, - ,. ... . .. . .. . . . . . ... . . . .
The invention relates to an apparatus for treat-ing tows with a liquid, the apparatu~ having a wash pipe and an in~ector, and to a proces~ for treating tows using such an apparatus.
5In order to completely remove impurities from fihres after spinning, it is necessary to sub~ect these fibres to an aftertreatment.
For thi~ purpose, the fibres may be cut and floated, and may be led as staple fi.bre web on screen 10bel~s through various bath sprinkling zones. In a gentler and more efficient variant of the aftertreatment, the continuous tow is guided through a closed pipe system through which an aftertreatment liquid is flushed. ~;~
By comparison with conven~ional aftertreatment, 15it is possible to bring the individual filaments after a short time into contact with large quantities of washing liqiuid, so that a good washout is effected. This sub-stantially higher ratio of washing liquid to fibre surface cannot be achieved with conventional screen belt 20and screen atertreatments.
Proce~ses of this type are described, for example in Swiss Patent Specification 273,357 and US Patent Specification 2,713,784. Special embodiments of the so- -called pipe wash, as described inter alia in 25"Chemiefasern nach dem Viskoseverfahren" (~'Synthetic fibres from the viscose process"), K. Goetze 3884/885 (1967), do without mechanical drawing-off aids, and flush the tow through the pipe system. In this case, injectors, which introduce the tow into the wash pipe and penetrate 30Lt and move it on with aftertreatment liquid, acquire an Lmportant ~ignificance.
In order to take up the fibre bundle in an appropriate fashion and to guarantee reliability of production, a ~et pressure of up to 3.0 bar is required 35at the injectors. In the case of ~ensitive fibres, for example fine fib~es or of those which contain modifying additives, such as carbon black, pigments or other inorganic particles, this ~hard ~et" causes fibre cracks.
In this zon~, fibre crack~ influence the further 2~332~
tr~atment, but also the product quality in a very negative fashion. As an example, mention may be made of the content of long fibres in the produc~lon of staple fibres: due to fibre cracks, tha fibres can no longer be S cut reliably, so that there are unde~irably long fibres in staple fibres which are to have besn cut to a specific length.
It is the ob~ect of the invention to overcome these disadvantages and to improve the apparatu~ of the type mentioned in the beginning so that a continuous tow can be introduced into a wash tube and floated there~
through, without causing fibre breaks or fibre cracks.
This ob~ect is achieved according ~o the invention in that the injector is constructed as a double in~ector consi~ting of an upper and a lower injector unit each having a hollow nozzle needle and a nozzle stock.
It is expedient if the internal diameter of the nozzle needle and of the nozzle stock in the upper and in the lower in~ector unit are each approxLmately the same, and if the internal dLameters of the lower in~ector unit are larger than the internal diameters of the upper injector unit. In this way, the lower injector unit has enough room for the tow to be surrounded by a suffici~
ently thick layer of liquid, and thereby protected.
Preferably, the ~et pressure of the upper and the jet pressure of ths lower in~ector unit are independently ad~ustable.
It is expediant if above each nozzle opening there i~ provided an annular chamber into which the feeds o~ movLng medium open.
When operating this apparatus it ~s expedient if the ~et pressure difference between the upper and lower ; in~ector unit is 0.5-2 bar, preferably approximately 1.0 bar, and if th2 ratio of the quantities of liquid that are supplied by the upper and lower injector unit lies between 1:1 and 1:5 and is preferably 1:3. It is possible to treat tows consisting of 6,000-5,000,000 individual filaments.
An illustrative embodiment of the invention will : ' .,.. .... - . .... ,.,.. , .. , , . . , .......... ~ .. , .. , . .~. ., .. ~. .. . .... .
.. : .
:::: :.. . ... . . .
_ 3 - 2~333~
be explained in more detail with reference to the figures, wherein Fig. 1 shows a double injector and how it can be u3ed according to the invention in an apparatus for treating tows; Fig. 2 shows a mod:ification thereof;
and Fig. 3 show~ the pressure relationships in the in~ector according to Fig. 1.
The double injector consis~s of a stationary central part 1, whose upper part forms the nozzle stock of the upper in~ector unit 2 and whose lower part represents the nozzle needle of the lower injector unit 3. A tubular upper part that can be moved by screwing i9 provided as the nozzle needle for the upper injector unit 2. The nozzle opening 4 can be adjusted by moving the upper part up and down. This part is widened in the form of a funnel at the uppermost end in order to take up and guide the tow 6. The lower in~ector unit consists of a liXewise movable, tubular blower part, whose uppermost part forms the nozzle stock.
The nozzle opening 5 of the lower injector unit is formed in common with the statLonary central part, which is constructed a~ the nozzle needle. The feeds 7 and 8 of moving medium open laterally above the nozzle openings 4 and 5 into annular chambers 9 and 10, before the medium comes into contact under pressure with the tow through th~ nozzle opening. The shape of the annular chamber 9 and }0 is designed such that no lateral over-pressure is produced.
By means of the upper in~ector unit, it i~
possible for the fibre bundle to be drawn very gently into the double in~ector with a ~et pressure that is reduced with respect to the lower in~ector unit, and with a part of the total wash liquid. In this process, the fibre bundlo i~ embedded in the wash liquid and is supplied to the lower in~ector~
The lower in~ector can be operated with a jet pressure that is increased by up to 2 bar with respect to the upper in~ector, and in this proc~ss the remaining amount of wash liquid is supplied.
The high ~et pressure now no longer reaches the -individual fibres t since the latter are surroun~aQ~y t~e liquid supplied in the first injector, and are thereby protected. ;~
Consequently, the desired, reliable introduction of the fibre bundle into the individual wash zones can take place in a gentle fashion.
In a ~pecial embodiment of the double injector, the funnel-shaped part, which introduces the tow into the double injector, can ~ additionally itted with drawing-in aids.
An exemplary embodiment of this type i8 represented in Fig. 2. 11 represents the inlet of the flush liquid, which passes via the annular chamber 12 and the overflow channels 13 into the nozzle annular ch mher 14, and immediately after emerging from the annular gap 15 takes hold of the tow and floats it onwards.
Upon changing the type of fibre in the tow, the nozzle cross-sections can be varied by displacing the nozzle needles in the nozzle stock, and consequently the flow conditions can be optimized, so that fibre breaks are excluded.
EXAMPLE 1:
A continuous tow of HWM fibresl consisting of 530,000 filaments of 1.7 dtex each is drawn off at a speed of 25 m/min and introduced into a pipe washing system by means of a double in~ector.
The ~et pressure in the upper in~ector is 0.5 bar. 1,000 l/h acid~lated water are pumped through.
The ~et pressure in the lower injector is 1.5 bar. The amount of Liquid is 3,000 l~h.
Fig. 3 illu~trates the fl~w conditions in the individual sections of the double injector. For this ; purpose, the latter i~ repre~ented once again at ths side.
:
1 Note: these fibres ara also known as modal fibre~. They have a high wet modulus, i.e. they do not -tear even in the wet state.
,',.: ... :... .. - .
: . . , :, . . ,: :
: :. .~ . . : . .
.... . . . . . .
2~3~2~
A squeeze roll which effect~ a bath separation is provided at the end of the first wash zone. The tow is introduced into the next treatment bath by a second double iniector.
EXA~PLE 2:
A continuou~ tow of viscose fibres which have incorporated graphite consi~ts of 31;2,000 filaments of 5.5 dtex each. It is drawn off at a speed of 25 m/min and introduced into a pipe washing system by means of a double injector.
The iet pressure in the upper in~ector i~ 0.5 bar. 2,000 1 acidulated waterthour are pumped through.
The jet pressure in the lower in~ector i~ 2.0 bar. The amount of liquid is 5,000 l/h.
EXAMRLE 3:
A continuou~ tow of cotton-type viscose fibres (ZS fibre production) consisting of 53,000 filaments of 1.3 dtex each i~ drawn off at a speed of 60 m/min and introduced into a pipe washing ~ystem by mean~ o~ a double injector.
The ~st pressure in the upper injector is 0.7 bar. 500 1 acidulated water/hour are pumped through.
The jet pressure in the lower in~ector is l.S
bar. The amount of liquid is 1200 l/h.
EXAMPLE 4: ;
A continuous tow of cellulosic fibres consisting of 10,000 filaments of 1.7 dtex each is drawn off at a speed of 60 m/min and introduced into a pipe washing sy3tem by means of a double iniector.
The ~et pres~ure in the uppar injector is 0.5 bar. 500 l wa~hing water/hour are pumped through.
The ~et pre~sure in the lower iniector is 1.O bar. The amount of liquid i~ 5,000 l/h.
, - ,. ... . .. . .. . . . . . ... . . . .
Claims (8)
1. Apparatus for treating tows with a liquid, the apparatus having a wash pipe and an injector, charac-terized in that the injector is constructed as a double injector consisting of an upper and a lower injector unit (2, 3) each having a hollow nozzle needle and a nozzle stock.
2. Apparatus according to Claim 1, characterized in that the internal diameter of the nozzle needle and of the nozzle stock in the upper and in the lower injector unit (2, 3) are each approximately the same, and in that the internal diameters of the lower injector unit (2) are larger than the internal diameters of the upper injector unit (3).
3. Apparatus according to Claim 1 or 2, charac-terized in that the jet pressure of the upper and the jet pressure of the lower injector unit (2, 3) are independently adjustable.
4. Apparatus according to one of Claims 1 to 3, characterized in that an annular chamber (9, 10) into which the needs of moving medium open is provided above each nozzle opening (4, 5).
5. Process for treating tows using a wash apparatus according to one of Claims 1 to 4.
6. Process according to Claim 5, characterized in that the jet pressure difference between the upper and lower injector unit is 0.5-2 bar, preferably approximately 1.0 bar.
7. Process according to Claim 5 or 6, characterized in that the ratio of the quantities of liquid that are supplied by the upper and lower injector unit lies between 1:1 and 1:5 and is preferably 1:3.
8. Process according to one of Claims 5 to 7, characterized in that a tow consisting of 6,000-5,000,000 individual filament is treated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT131689 | 1989-05-31 | ||
| AT1316/89 | 1989-05-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2033324A1 true CA2033324A1 (en) | 1990-12-01 |
Family
ID=3511255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002033324A Abandoned CA2033324A1 (en) | 1989-05-31 | 1990-05-31 | Apparatus for treating tows with a liquid |
Country Status (19)
| Country | Link |
|---|---|
| EP (1) | EP0401204A1 (en) |
| JP (1) | JPH04500249A (en) |
| KR (1) | KR920700323A (en) |
| CN (1) | CN1049693A (en) |
| AU (1) | AU5744790A (en) |
| BR (1) | BR9006783A (en) |
| CA (1) | CA2033324A1 (en) |
| CS (1) | CS269690A3 (en) |
| DD (1) | DD294740A5 (en) |
| ES (1) | ES2019270A4 (en) |
| FI (1) | FI910449A0 (en) |
| GR (1) | GR910300007T1 (en) |
| IL (1) | IL94523A0 (en) |
| NO (1) | NO910335D0 (en) |
| PL (1) | PL285328A1 (en) |
| PT (1) | PT94182A (en) |
| WO (1) | WO1990015174A1 (en) |
| ZA (1) | ZA904101B (en) |
| ZW (1) | ZW8790A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3219950B2 (en) * | 1994-12-01 | 2001-10-15 | キヤノン株式会社 | INK JET RECORDING APPARATUS AND DISCHARGE RECOVERY METHOD OF INK JET RECORDING APPARATUS |
| AT402947B (en) * | 1995-12-27 | 1997-09-25 | Chemiefaser Lenzing Ag | METHOD FOR PRODUCING CELLULOSIC FIBERS AND DEVICE FOR IMPLEMENTING THE METHOD |
| DE102008052036A1 (en) | 2008-10-16 | 2010-04-22 | Oerlikon Textile Gmbh & Co. Kg | Preparation device for preparing a thread |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE478156A (en) * | 1942-07-11 | |||
| GB636926A (en) * | 1946-10-23 | 1950-05-10 | British Celanese | Improvements in or relating to apparatus and processes for the treatment of yarns and like materials with fluids |
| NL76667C (en) * | 1949-05-05 | |||
| US2661618A (en) * | 1950-01-17 | 1953-12-08 | American Viscose Corp | Tube for treating fibers and the like with fluid under pressure |
-
1990
- 1990-05-24 PL PL28532890A patent/PL285328A1/en unknown
- 1990-05-28 IL IL94523A patent/IL94523A0/en unknown
- 1990-05-29 ZA ZA904101A patent/ZA904101B/en unknown
- 1990-05-29 PT PT94182A patent/PT94182A/en not_active Application Discontinuation
- 1990-05-29 DD DD90341094A patent/DD294740A5/en not_active IP Right Cessation
- 1990-05-29 ZW ZW87/90A patent/ZW8790A1/en unknown
- 1990-05-31 AU AU57447/90A patent/AU5744790A/en not_active Abandoned
- 1990-05-31 EP EP90890171A patent/EP0401204A1/en not_active Withdrawn
- 1990-05-31 CS CS902696A patent/CS269690A3/en unknown
- 1990-05-31 BR BR909006783A patent/BR9006783A/en not_active Application Discontinuation
- 1990-05-31 ES ES90890171T patent/ES2019270A4/en active Pending
- 1990-05-31 WO PCT/AT1990/000053 patent/WO1990015174A1/en active Application Filing
- 1990-05-31 CN CN90103387A patent/CN1049693A/en active Pending
- 1990-05-31 KR KR1019900702588A patent/KR920700323A/en not_active Application Discontinuation
- 1990-05-31 JP JP2508309A patent/JPH04500249A/en active Pending
- 1990-05-31 CA CA002033324A patent/CA2033324A1/en not_active Abandoned
-
1991
- 1991-01-29 NO NO910335A patent/NO910335D0/en unknown
- 1991-01-30 FI FI910449A patent/FI910449A0/en unknown
- 1991-11-15 GR GR91300007T patent/GR910300007T1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ZW8790A1 (en) | 1990-10-10 |
| NO910335L (en) | 1991-01-29 |
| DD294740A5 (en) | 1991-10-10 |
| ZA904101B (en) | 1991-03-27 |
| ES2019270A4 (en) | 1991-06-16 |
| PL285328A1 (en) | 1991-01-28 |
| FI910449A0 (en) | 1991-01-30 |
| WO1990015174A1 (en) | 1990-12-13 |
| EP0401204A1 (en) | 1990-12-05 |
| IL94523A0 (en) | 1991-03-10 |
| PT94182A (en) | 1991-12-31 |
| KR920700323A (en) | 1992-02-19 |
| BR9006783A (en) | 1991-08-13 |
| CN1049693A (en) | 1991-03-06 |
| NO910335D0 (en) | 1991-01-29 |
| AU5744790A (en) | 1991-01-07 |
| GR910300007T1 (en) | 1991-11-15 |
| JPH04500249A (en) | 1992-01-16 |
| CS269690A3 (en) | 1992-01-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |