CA1172084A - Link belts - Google Patents
Link beltsInfo
- Publication number
- CA1172084A CA1172084A CA000385311A CA385311A CA1172084A CA 1172084 A CA1172084 A CA 1172084A CA 000385311 A CA000385311 A CA 000385311A CA 385311 A CA385311 A CA 385311A CA 1172084 A CA1172084 A CA 1172084A
- Authority
- CA
- Canada
- Prior art keywords
- link belt
- strip
- coil
- belt structure
- coils
- 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
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/0027—Screen-cloths
- D21F1/0072—Link belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/30—Belts or like endless load-carriers
- B65G15/54—Endless load-carriers made of interwoven ropes or wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/02—Articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Belt Conveyors (AREA)
- Developing Agents For Electrophotography (AREA)
- Sanitary Thin Papers (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Wire Processing (AREA)
- Woven Fabrics (AREA)
Abstract
ABSTRACT
A link belt structure formed from interdigitated coils joined by hinge wires is provided with tape-like elements within the individual coils to reduce the permeability of the total structure and/or to introduce some requisite character therein appropriate to the nature of the elements and their relationship to the coils within which the same are located.
A link belt structure formed from interdigitated coils joined by hinge wires is provided with tape-like elements within the individual coils to reduce the permeability of the total structure and/or to introduce some requisite character therein appropriate to the nature of the elements and their relationship to the coils within which the same are located.
Description
~7~84 LINK BELTS
The invention concerns link belts, and has more particular reference to link belts of the kind comprising a multiplicity of helical coils of a ~hermoplastic 5. material arranged in adjacent interdigitated disposition.
A link belt of this general kind is disclosed in German Auslegeschrift No. 24 19 751, whilst an improved form thereof is the subject matter of British Patent Application No. 8015965 (2051154A).
10. The link belts as aforesaid, the adjacent coils of such belts usually being connected together by means of hinge wires engaged with the interdigitated turns thereof, are thought to have application as support str~ctures in the context of papermaking and like 15. machines. However, the extent of their application in this context is believed to be limited having regard to the high degree of permeability of the belt, the inherent permeability of the belt per se substantially exceeding that required for some papermachine dryer fabric appli-20. cations and rendering the belt per se unsuitable forthese applications.
It has been proposed to reduce the permeability of a link belt by introducing yarns into the space within a given coil and between the opposing bights of 25. the coils existing at either side of the given coil and interdigitated therewith, but this proposal has proved ~ 172:~134 unsatisfactory in that difficulty is experienced in locating a sufficient mass of yarn within the space and throughout the full axial extent thereof materially to affect permeability~
5. The object of the invention is to provide a link fabric structure having a substantially lesser per-meability than the inherent permeability of the link belt ~er se and of a weight per unit area not substantially different from that of such link belt per se.
10. According to the present invention there is pro-posed a link belt structure comprising a multiplicity of helical coils of a thermoplastic material arranged in interdigitated side-by-side disposition to define a link belt, characterised by a strip or strips of 15. a tape-like material arranged in some at least of the respective spaces within each coil and existing between the opposed bights of those coils at either side thereof and arranged in interdigitated disposition therewith and the inside of the said coil.
20. According to a preferred feature, the coils are of flattened form, the minor internal dimension thereof being less than the space between opposing bights of respective coils engaged with a given coil at each side thereof.
25. According to a further preferred feature, the or each strip is of a width at least equal to the internal ~7;~
dimension of the coil measured in a direction per-pendicular to the plane of the said structure.
Preferably the or each strip is of a width approximating to but less than the spacing between 5. the opposed bights.
According to a still further preferred feature, the tape has a reflective surface at one face at least thereof.
Typical tape-like strips comprise the reflective 10. strip aforesaid, a monofilament polyester or other yarn of flat form wherein the width/thickness ratio is of the order of 2 or more to 1, or a split film tape wherein the width/thickness ratio is approximately 75:1 The tape may be wholly impermeable or may be 15. of braided form and hence of limited permeability.
The invention will now be described further, by way of example only, with reference to the accompanying drawings illustrating two embodiments thereof and in which:-20. Fig. 1 is a plan view of a link belt structure embodying the invention;
Fig. 2 is a sectional view of the structure of Fig.
1, drawn to a larger scale; and Fig. 3 is an end elevation of a part of the link 25. belt structure of Fig. 1, drawn to a larger scale.
1~7;~84 Referring now to the drawings, a link belt com-prises a multiplicity of individual, helical coils 11 arranged in interdigitated side-by-side disposition and connected together by respective hinge wires 12 5. threaded through the interdiaitated turns of adjacent coils. The coils 11 are of a synthetic thermoplastic monofilament material, as too are the hinge wires 12, and the link belt as thus far described is produced in accordance with the teaching of the specification 10. of British Patent Application No. 8015965 (2051154A) to which reference is directed for further detail.
As provided for by the present invention each coil of the link belt as aforesaid includes a respective moisture impermeable tape-like element 13, the tape-15. like element 13 being located in that space 14 withina given coil existing between the opposed bights 15, 16 of the turns of the coils existing at either side of the given coil and engaged therewith. The longi-tudinal edges of the link belt are sealed to hold the 20. strips in the respective coils.
In a typical example, the coils are produced from a monofilament yarn having a dimaeter of 0.7mm and the major and minor dimensions of the flattened interior form of the coil are respectively 6mm and lmm. The tape-25. like element 13 comprises a metallised plastics filmstrip approximately 3mm wide.
In the particular example under consideration, at ~7~8~
least one side of the tape is metallised, but the surface characteristics of the strip will be determined having regard to the specific requirements of the context in which the link belt structure, that is to say 5. the link belt per se and the tape-like elements applied thereto, is to be used, be it in the field of paper-machine clothing or otherwise. The thickness of the strip is not thought to be in any way critical, sub~ect to the proviso that the strength thereof is adequate to lO. enable satisfactory introduction of the strip into the space as bv drawing a length, say lO metres, of the same longitudinally of the coil.
Indications are that, bv means of the tape-like elements as herein proposed, we are able to reduce the 15. permeability of the link belt as measured on a Frazier Standard Air Permeability Testing Machine from, say 16000 cubic metres per square metre per hour at lOO pascals pressure difference to, say, 3200 cubic metres per square metre per hour at the same difference, and thereby provide 20. a structure of a permeability appropriate to that of a dryer fabric for a present-day high speed newsprint machine.
Conveniently, the tape-like element is of a width in excess of the minor dimension of the coil and approx-imating to the separation of the bights 15, 16, the tape 25. being entered flat as shown in Fig. 3 of the drawings and extending in continuous form throughout the full ~7~4 axial extent of the coil. Whilst generally, the width of the strip will be at least 1.25 times the minor internal dimension of the coil, it may be found convenient, in some instances, for the strip to be of a width 5. approximating to the minor internal dimension of the coil and for the strip to be twisted slightly about the longitudinal axis thereof. If desired, side-by-side strips may be provided in each space. As an alternative to having the strip (or strips) extend continuously 10. throughout the full axial extent of each coil, short strips of a length substantially less than the full axial extent of the coil may be provided in spaced end-to-end disposition within the coil, or strips (or pluralities thereof) may be provided in respect of some only of the 15. coils.
The invention is not limited in its application to coils of the flattened form shown in Fia . 3, and may be applied to the context of coils of circular or oval transverse cross-section, the strips conveniently bein~
20. of a width to extend in contact with the inner surface of the coil with the longitudinal edges thPreof in con-tact with the surface of the respective bights where the same cross the coil inner surface.
It is to be observed that, by providing the strip 25. in the form of a coloured elementl thereby to render a hue to the fabric, a permeability colour-code charac-teristic can be introduced. In an alternative arrangement 1~ 7Z~8~
the strips are of such cross-sectional dimension as to be capable of movement, whether as translational or pivotal motion, in the direction of the minor internal dimension of the coils, such movement being used to 5. control the flow of air through the fabric.
The invention concerns link belts, and has more particular reference to link belts of the kind comprising a multiplicity of helical coils of a ~hermoplastic 5. material arranged in adjacent interdigitated disposition.
A link belt of this general kind is disclosed in German Auslegeschrift No. 24 19 751, whilst an improved form thereof is the subject matter of British Patent Application No. 8015965 (2051154A).
10. The link belts as aforesaid, the adjacent coils of such belts usually being connected together by means of hinge wires engaged with the interdigitated turns thereof, are thought to have application as support str~ctures in the context of papermaking and like 15. machines. However, the extent of their application in this context is believed to be limited having regard to the high degree of permeability of the belt, the inherent permeability of the belt per se substantially exceeding that required for some papermachine dryer fabric appli-20. cations and rendering the belt per se unsuitable forthese applications.
It has been proposed to reduce the permeability of a link belt by introducing yarns into the space within a given coil and between the opposing bights of 25. the coils existing at either side of the given coil and interdigitated therewith, but this proposal has proved ~ 172:~134 unsatisfactory in that difficulty is experienced in locating a sufficient mass of yarn within the space and throughout the full axial extent thereof materially to affect permeability~
5. The object of the invention is to provide a link fabric structure having a substantially lesser per-meability than the inherent permeability of the link belt ~er se and of a weight per unit area not substantially different from that of such link belt per se.
10. According to the present invention there is pro-posed a link belt structure comprising a multiplicity of helical coils of a thermoplastic material arranged in interdigitated side-by-side disposition to define a link belt, characterised by a strip or strips of 15. a tape-like material arranged in some at least of the respective spaces within each coil and existing between the opposed bights of those coils at either side thereof and arranged in interdigitated disposition therewith and the inside of the said coil.
20. According to a preferred feature, the coils are of flattened form, the minor internal dimension thereof being less than the space between opposing bights of respective coils engaged with a given coil at each side thereof.
25. According to a further preferred feature, the or each strip is of a width at least equal to the internal ~7;~
dimension of the coil measured in a direction per-pendicular to the plane of the said structure.
Preferably the or each strip is of a width approximating to but less than the spacing between 5. the opposed bights.
According to a still further preferred feature, the tape has a reflective surface at one face at least thereof.
Typical tape-like strips comprise the reflective 10. strip aforesaid, a monofilament polyester or other yarn of flat form wherein the width/thickness ratio is of the order of 2 or more to 1, or a split film tape wherein the width/thickness ratio is approximately 75:1 The tape may be wholly impermeable or may be 15. of braided form and hence of limited permeability.
The invention will now be described further, by way of example only, with reference to the accompanying drawings illustrating two embodiments thereof and in which:-20. Fig. 1 is a plan view of a link belt structure embodying the invention;
Fig. 2 is a sectional view of the structure of Fig.
1, drawn to a larger scale; and Fig. 3 is an end elevation of a part of the link 25. belt structure of Fig. 1, drawn to a larger scale.
1~7;~84 Referring now to the drawings, a link belt com-prises a multiplicity of individual, helical coils 11 arranged in interdigitated side-by-side disposition and connected together by respective hinge wires 12 5. threaded through the interdiaitated turns of adjacent coils. The coils 11 are of a synthetic thermoplastic monofilament material, as too are the hinge wires 12, and the link belt as thus far described is produced in accordance with the teaching of the specification 10. of British Patent Application No. 8015965 (2051154A) to which reference is directed for further detail.
As provided for by the present invention each coil of the link belt as aforesaid includes a respective moisture impermeable tape-like element 13, the tape-15. like element 13 being located in that space 14 withina given coil existing between the opposed bights 15, 16 of the turns of the coils existing at either side of the given coil and engaged therewith. The longi-tudinal edges of the link belt are sealed to hold the 20. strips in the respective coils.
In a typical example, the coils are produced from a monofilament yarn having a dimaeter of 0.7mm and the major and minor dimensions of the flattened interior form of the coil are respectively 6mm and lmm. The tape-25. like element 13 comprises a metallised plastics filmstrip approximately 3mm wide.
In the particular example under consideration, at ~7~8~
least one side of the tape is metallised, but the surface characteristics of the strip will be determined having regard to the specific requirements of the context in which the link belt structure, that is to say 5. the link belt per se and the tape-like elements applied thereto, is to be used, be it in the field of paper-machine clothing or otherwise. The thickness of the strip is not thought to be in any way critical, sub~ect to the proviso that the strength thereof is adequate to lO. enable satisfactory introduction of the strip into the space as bv drawing a length, say lO metres, of the same longitudinally of the coil.
Indications are that, bv means of the tape-like elements as herein proposed, we are able to reduce the 15. permeability of the link belt as measured on a Frazier Standard Air Permeability Testing Machine from, say 16000 cubic metres per square metre per hour at lOO pascals pressure difference to, say, 3200 cubic metres per square metre per hour at the same difference, and thereby provide 20. a structure of a permeability appropriate to that of a dryer fabric for a present-day high speed newsprint machine.
Conveniently, the tape-like element is of a width in excess of the minor dimension of the coil and approx-imating to the separation of the bights 15, 16, the tape 25. being entered flat as shown in Fig. 3 of the drawings and extending in continuous form throughout the full ~7~4 axial extent of the coil. Whilst generally, the width of the strip will be at least 1.25 times the minor internal dimension of the coil, it may be found convenient, in some instances, for the strip to be of a width 5. approximating to the minor internal dimension of the coil and for the strip to be twisted slightly about the longitudinal axis thereof. If desired, side-by-side strips may be provided in each space. As an alternative to having the strip (or strips) extend continuously 10. throughout the full axial extent of each coil, short strips of a length substantially less than the full axial extent of the coil may be provided in spaced end-to-end disposition within the coil, or strips (or pluralities thereof) may be provided in respect of some only of the 15. coils.
The invention is not limited in its application to coils of the flattened form shown in Fia . 3, and may be applied to the context of coils of circular or oval transverse cross-section, the strips conveniently bein~
20. of a width to extend in contact with the inner surface of the coil with the longitudinal edges thPreof in con-tact with the surface of the respective bights where the same cross the coil inner surface.
It is to be observed that, by providing the strip 25. in the form of a coloured elementl thereby to render a hue to the fabric, a permeability colour-code charac-teristic can be introduced. In an alternative arrangement 1~ 7Z~8~
the strips are of such cross-sectional dimension as to be capable of movement, whether as translational or pivotal motion, in the direction of the minor internal dimension of the coils, such movement being used to 5. control the flow of air through the fabric.
Claims (11)
1. A link belt structure comprising a multiplicity of helical coils of a thermoplastic material arranged in interdigitated side-by-side disposition to define a link belt, characterised by at least one strip of a tape-like material arranged in some at least of the spaces within the respective coils and existing between the opposed bights of those coils at either side of a given coil and arranged in interdigitated disposition therewith and the inside of the said given coil.
2. A link belt structure as claimed in claim 1, wherein the coils are of flattened form, the minor internal dimension thereof being less than the space between opposing bights of respective coils engaged with a given coil at each side thereof.
3. A link belt structure as claimed in claim 1, wherein the or each strip is of a width at least equal to the internal dimension of the coil measured in a direction perpendicular to the plane of the said structure.
4. A link belt structure as claimed in claim 3, wherein the or each strip is of a width equal to at least 1.25 times the said internal dimension of the coil.
5. A link belt structure as claimed in claim 1, wherein the or each strip is of a width approximating to the spacing between the opposed bights.
6. A link belt structure as claimed in claim 1, wherein a single strip only is provided in a respective coil.
7. A link belt structure as claimed in claim 1, wherein at least one strip is provided in each respective coil.
8. A link belt structure as claimed in claim 1, wherein the strip or strips provided in a respective coil extend or collectively extend throughout the full longitudinal extent of such coil.
9. A link belt structure as claimed in claim 1, wherein each strip is impermeable to moisture.
10. A link belt structure as claimed in claim 1, wherein each strip is metallised to provide a reflective characteristic thereto.
11. A link belt structure as claimed in claim 1, wherein the width/thickness ratio of each strip lies within the range of 2:1 to 75:1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8028861 | 1980-09-06 | ||
| GB8028861 | 1980-09-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1172084A true CA1172084A (en) | 1984-08-07 |
Family
ID=10515904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000385311A Expired CA1172084A (en) | 1980-09-06 | 1981-09-04 | Link belts |
Country Status (19)
| Country | Link |
|---|---|
| JP (1) | JPS57116950A (en) |
| AR (1) | AR225830A1 (en) |
| AT (1) | AT377800B (en) |
| AU (1) | AU543016B2 (en) |
| BE (1) | BE890206A (en) |
| BR (1) | BR8105691A (en) |
| CA (1) | CA1172084A (en) |
| CH (1) | CH654361A5 (en) |
| DE (1) | DE3135140A1 (en) |
| ES (1) | ES273282Y (en) |
| FI (1) | FI812731L (en) |
| FR (1) | FR2489794B1 (en) |
| IN (1) | IN156814B (en) |
| IT (1) | IT1138167B (en) |
| NL (1) | NL8104109A (en) |
| NO (1) | NO154555C (en) |
| NZ (1) | NZ198161A (en) |
| SE (1) | SE8105269L (en) |
| ZA (1) | ZA815836B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3039873C2 (en) * | 1980-10-22 | 1986-02-06 | Siteg Siebtechnik GmbH, 4422 Ahaus | Method for producing a screen belt provided with filling material |
| FR2494318B1 (en) * | 1980-11-14 | 1986-10-10 | Feutres Papeteries Tissus Indl | BAND CONSISTING OF SPIRALS |
| US4839213A (en) * | 1980-11-14 | 1989-06-13 | Cofpa | Conveyor belt constituted by plastic spirals |
| GB8302118D0 (en) * | 1983-01-26 | 1983-03-02 | Scapa Porritt Ltd | Link belts |
| JPS59173396A (en) * | 1983-03-17 | 1984-10-01 | 大和紡績株式会社 | Dryer canvas for papermaking and production thereof |
| JPS616390A (en) * | 1984-05-01 | 1986-01-13 | ジエイダブリユ−アイ・リミテツド | Cloth for dryer having yarn strand prepared from melt extrudable polyphenylene sulfide |
| DE3511166A1 (en) * | 1985-03-27 | 1986-10-09 | Siteg Siebtechnik GmbH, 4422 Ahaus | SPIRAL LINK WITH REDUCED AIR PLANTITY AND METHOD FOR THE PRODUCTION THEREOF |
| DE3534264A1 (en) * | 1985-09-26 | 1987-04-02 | Siteg Siebtech Gmbh | SPIRAL LINKED BAND WITH FILLING SPIRALS Wrapped Around the Plug Wire |
| US7575659B2 (en) * | 2004-12-15 | 2009-08-18 | Albany International Corp. | Spiral fabrics |
| GB2498922A (en) * | 2011-12-14 | 2013-08-07 | Madison Filter 981 Ltd | Antistatic link belt |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE265673C (en) * | ||||
| DE296427C (en) * | ||||
| AT79037B (en) * | 1916-06-16 | 1919-11-10 | Ostrau Witkowitzer Eisen U Dra | Wire belt made of helically wound wires. |
| DE2419751C3 (en) * | 1974-04-24 | 1982-01-21 | Kerber, geb. Poth, Hella, 6731 Weidenthal | Wire link belt e.g. for paper machines |
| CH610273A5 (en) * | 1975-10-02 | 1979-04-12 | Munzinger Conrad & Cie Ag | Flat formation acting as a wire link conveyor |
-
1981
- 1981-08-24 ZA ZA815836A patent/ZA815836B/en unknown
- 1981-08-25 NZ NZ198161A patent/NZ198161A/en unknown
- 1981-08-26 IN IN548/DEL/81A patent/IN156814B/en unknown
- 1981-08-27 IT IT23668/81A patent/IT1138167B/en active
- 1981-08-28 CH CH5540/81A patent/CH654361A5/en not_active IP Right Cessation
- 1981-09-03 BE BE0/205859A patent/BE890206A/en not_active IP Right Cessation
- 1981-09-03 FI FI812731A patent/FI812731L/en not_active Application Discontinuation
- 1981-09-03 NO NO812987A patent/NO154555C/en unknown
- 1981-09-04 CA CA000385311A patent/CA1172084A/en not_active Expired
- 1981-09-04 ES ES1981273282U patent/ES273282Y/en not_active Expired
- 1981-09-04 NL NL8104109A patent/NL8104109A/en not_active Application Discontinuation
- 1981-09-04 AR AR286652A patent/AR225830A1/en active
- 1981-09-04 JP JP56138664A patent/JPS57116950A/en active Granted
- 1981-09-04 BR BR8105691A patent/BR8105691A/en unknown
- 1981-09-04 AU AU74961/81A patent/AU543016B2/en not_active Ceased
- 1981-09-04 DE DE19813135140 patent/DE3135140A1/en not_active Withdrawn
- 1981-09-04 SE SE8105269A patent/SE8105269L/en unknown
- 1981-09-04 FR FR8116857A patent/FR2489794B1/en not_active Expired
- 1981-09-07 AT AT0385481A patent/AT377800B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| BR8105691A (en) | 1982-05-25 |
| AR225830A1 (en) | 1982-04-30 |
| FR2489794A1 (en) | 1982-03-12 |
| ZA815836B (en) | 1982-08-25 |
| CH654361A5 (en) | 1986-02-14 |
| FI812731L (en) | 1982-03-07 |
| FR2489794B1 (en) | 1986-01-17 |
| NO812987L (en) | 1982-03-08 |
| ES273282Y (en) | 1984-10-01 |
| NO154555C (en) | 1986-10-15 |
| BE890206A (en) | 1982-01-04 |
| ES273282U (en) | 1984-03-01 |
| JPS6254918B2 (en) | 1987-11-17 |
| IT1138167B (en) | 1986-09-17 |
| NO154555B (en) | 1986-07-07 |
| IT8123668A0 (en) | 1981-08-27 |
| AU7496181A (en) | 1982-03-18 |
| JPS57116950A (en) | 1982-07-21 |
| NZ198161A (en) | 1985-03-20 |
| AT377800B (en) | 1985-04-25 |
| DE3135140A1 (en) | 1982-04-15 |
| SE8105269L (en) | 1982-03-07 |
| AU543016B2 (en) | 1985-03-28 |
| IN156814B (en) | 1985-11-09 |
| NL8104109A (en) | 1982-04-01 |
| ATA385481A (en) | 1984-09-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |