CA1179951A - Filters and their manufacture - Google Patents
Filters and their manufactureInfo
- Publication number
- CA1179951A CA1179951A CA000386263A CA386263A CA1179951A CA 1179951 A CA1179951 A CA 1179951A CA 000386263 A CA000386263 A CA 000386263A CA 386263 A CA386263 A CA 386263A CA 1179951 A CA1179951 A CA 1179951A
- Authority
- CA
- Canada
- Prior art keywords
- casing
- tray
- sealant
- filter medium
- filter cartridge
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0098—Protecting coverages on the filter which is removed before the filter is used, protection of filter, packaging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
-
- 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
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/48—Processes of making filters
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Abstract A replaceable filter cartridge has a pleated paper filter medium mounted within a frame or casing having a closed side and an open side, the open side being covered by a removable protective tray or lid the internal shape of which has been used in manufacture for moulding a sealing surface onto the periphery of the frame or casing, the closed side of the frame or casing being provided with a perforated portion which is also removable for use of the filter cartridge.
Description
FILTERS AND THEIR MANUFACTURE
Description This invention is concerned with fluid filters and their manufacture and it is especially applicable to so-called 'flat' or 'panel' filters, but it is not restricted just to such filters.
Filter cartridges require sealing surfaces in order to form a fluid-tight seal within and against the apparatus, such as a filter housing in which they are to be employed. It has been proposed previously to produce filter cartridges by filling a mould of appropriate configuration with a liquid or pasty sealant material suitable for forming the required ~a~ g surface by cold cure, hot set, and placing the filter medium or media and any support or ancilliary components into the said material. On completion of a suitable curing or setting, the filter cartridge with its integrated sealing surface is removed from the mould and can be packaged for example in a suitable container for despatch to a user. The use of a mould release agent is advantageous and often may be sprayed on to the mould before re-use thereof. The sealant may serve as a combined inter-pleat sealant and end - cap in an annular pleated paper filter cartridge or as ~179~5~
an edge sealant/gasket seal in a panel filter.
The present invention has an object to simplify the production of such filters and to reduce both labour and material costs.
In one aspect thereof, this invention provides a combined filter cartridge and package comprising a two-part packing enclosure consisting of a main casing having an opening and a detachable tray or lid closing the said opening; the casing serving as a frame for a filter medium mounted therewithin, and the tray or lid serving to protect a sealant providing a perimetral sealing surface for the filter cartridge and moulded in situ within said tray or lid, which tray or lid is adapted to be detached for use of said filter cartridge; the casing being united with the filter medium by both said casing and said filter medium extending into and being secured to said sealant, whereby said casing, sealant, and tray or lid fully enclose said filter medium.
Because the important sealing surface is protected by the lid or tray and because the filter medium is fully enclosed by the frame~casing and tray/lid, a conventional packaging as provided by a 1~79951 separate container will in general be unnecessary although a plastics shrink film may be applied about the cartridge for additional protection. The filter medium is protected by the frame or casing and by the tray or lid, the two together effectively acting as a packaging enclosure or container for the filter cartridge, the frame or casing suitably carrying fitting instructions, trade marks and other identification printed thereon.
In a preferred embodiment the frame or casing includes a perforated top portion requiring detachment as well as the tray by the user to place the filter cartridge in use.
As the tray or lid serves as a one-off mould lS and as such is left in position by the manufacturer to be detached by the user and since further solid packaging will in general be unnecessary, substantial manufacturing economies are possible in the production of filter caetridges packaged for transport or sale.
2Q In a second and alternative aspect thereof, the invention provides a method for the production of filter cartridges packaged for transport or sale, comprising the steps of: dispensing into a tray which is adapted both for use as a one-off mould and as a protection for a perimetral sealing surface of the filter cartridge a predetermined quantity of a sealant in liquid or pasty form; and sinking an end portion of a filter medium, and an end portion of a casing adapted also to serve as a frame for the filter medium into the sealant in the mould at least before it has completely cured or set so that when the curing or setting of the sealant is complete a unitary filter cartridge consisting of the frame, the filter medium and the sealant results, the filter medium being fully enclosed in the resulting packing enclosure defined by the casing and the protective tray detachable prior to uae.
The invention is hereinafter more particularly described by way of example only with reference to the accompanying drawings, in which:-Fig. 1 is a perspective view of an embodiment of combined filter cartridge and package in 2Q accordance with this invention, and Figs. 2, 3 and 4 are similar simplified sectional views illustrating successive stages in the production of the combined filter cartridge and package of Fig. 1.
The panel filter cartridge of Fig. 1 has a casing or frame 1 suitably of paperboard having a panel 3 surrounded by perforation at 2 to define a portion 3 readily removable ~ 9951 by a user. Mounted within the casing or frame 1 is the filter medium 4, here in the form of a pleated paper element with parallel pleats 5 the ends of adjacent pleats being sealed together by a suitable sealing compound. The cartridge is seated within a disposable plastics tray or lid 6 which covers what is the underside of the cartridge in the view of Fig. 1 where the filter medium would otherwise be exposed and protects sealing surfaces 7 around the edge of the said underside.
To place the cartridge in use tray 6 is detached and a perforated section 3 on the upper surface (in Fig. 1) of the casing 1 is removed the cartridge can then function as a conventional panel filter.
The tray or lid 6 and the casing 1 together serve as a packaging container without need for an additional paperboard carton. Fitting instructions, trade marks and other identif'i-cation are printed on the casing.
Reference is now made to Figs. 2, 3 and 4 which schematic-ally illustrate how the packaged filter cartridge of Fig. 1 is produced.
As the sectional view Pf Fig. 2 shows, tray 6 is of a plastics material and has a well 8 defined between its circum-extending upstandir,g wall 9 and a centrally disposed raised portion 10. Tray 6 is rectangular in form in the case of the panel f`ilter illustrated in Fig. 1, having four straight well lengths along and adjacent the four edges of the tray , ,~ S
.;i .. i _ ~ _ 11799Sl `` -".
bottom. If the invention is employed in the manufacture Or a cylindrical filter cartridge the well will be annular in form.
.
The filter medium in the present example is a pleated~
paper element ~ormed by a suitable pleating process generally known in the filter making art and durlng this process the ends of the pleats are coated with a settable sealant material 13 so that as they are brought together the ends Or adjacent pleats are se81ed together. The element is dimensioned to fit into casing or frame 1 with the open edge 12 extending outward of the pleats.
A predetermined quantity of the sealant material 11 is dispensed into well 8 in liquid or pasty form so as to fill it to excess as shown in Fig. 3. Various hot melt, ., . _ . , _ . . ._ heat curing and cold cure systems are commercially available for this. Preferably however polyurethane which has a two part mix and a cold cure is used for the sealant. The mould/tray 6 would preferably be made of a material such as cardboard or metal foil, rather than of plastics, if a heat cure or hot melt system were to be employed.
The filter medium which here is in the form of a pleated paper element 4 with parallel pleats 5 is placed into the mould~tray 6 so as to enter into the sealant material (Fig. 4), and the frame or case 1 is placed over the filter medium so that the end portion thereof about its lower open edge 12 sinks into the sealant 11 in well 8.
1179951 -- `
Alternatively, and as presently preferred the filter medium is loaded :-~
Within the frame or case 1, which is then lowered into the mould/tray 6 so that end portions both of the filter material and the frame or case simultaneously sink into the sealant .
11 in well 8 Again, although not shown, the filter medium may be sealed or adhered to the inside of the frame or case in the interests of increased rigidity. In either event the sealant is allowed to set or to complete its cure as appropriate resulting in a unitary filter cartridge as shown -10 in Fig. 1.
The mould which is also described herein as a lid or tray is suitably made of a transparent plastics material so that the sealing surface can readily be inspected. The preferred material for the mould is a laminate of pvc with poiyethylene, the polyethylene being on the interior surface of the mould to facilitate release without use of mould release agents. Alternatively, the mould could be formed of card-board or metal foil or other plastic or rubber material.
Description This invention is concerned with fluid filters and their manufacture and it is especially applicable to so-called 'flat' or 'panel' filters, but it is not restricted just to such filters.
Filter cartridges require sealing surfaces in order to form a fluid-tight seal within and against the apparatus, such as a filter housing in which they are to be employed. It has been proposed previously to produce filter cartridges by filling a mould of appropriate configuration with a liquid or pasty sealant material suitable for forming the required ~a~ g surface by cold cure, hot set, and placing the filter medium or media and any support or ancilliary components into the said material. On completion of a suitable curing or setting, the filter cartridge with its integrated sealing surface is removed from the mould and can be packaged for example in a suitable container for despatch to a user. The use of a mould release agent is advantageous and often may be sprayed on to the mould before re-use thereof. The sealant may serve as a combined inter-pleat sealant and end - cap in an annular pleated paper filter cartridge or as ~179~5~
an edge sealant/gasket seal in a panel filter.
The present invention has an object to simplify the production of such filters and to reduce both labour and material costs.
In one aspect thereof, this invention provides a combined filter cartridge and package comprising a two-part packing enclosure consisting of a main casing having an opening and a detachable tray or lid closing the said opening; the casing serving as a frame for a filter medium mounted therewithin, and the tray or lid serving to protect a sealant providing a perimetral sealing surface for the filter cartridge and moulded in situ within said tray or lid, which tray or lid is adapted to be detached for use of said filter cartridge; the casing being united with the filter medium by both said casing and said filter medium extending into and being secured to said sealant, whereby said casing, sealant, and tray or lid fully enclose said filter medium.
Because the important sealing surface is protected by the lid or tray and because the filter medium is fully enclosed by the frame~casing and tray/lid, a conventional packaging as provided by a 1~79951 separate container will in general be unnecessary although a plastics shrink film may be applied about the cartridge for additional protection. The filter medium is protected by the frame or casing and by the tray or lid, the two together effectively acting as a packaging enclosure or container for the filter cartridge, the frame or casing suitably carrying fitting instructions, trade marks and other identification printed thereon.
In a preferred embodiment the frame or casing includes a perforated top portion requiring detachment as well as the tray by the user to place the filter cartridge in use.
As the tray or lid serves as a one-off mould lS and as such is left in position by the manufacturer to be detached by the user and since further solid packaging will in general be unnecessary, substantial manufacturing economies are possible in the production of filter caetridges packaged for transport or sale.
2Q In a second and alternative aspect thereof, the invention provides a method for the production of filter cartridges packaged for transport or sale, comprising the steps of: dispensing into a tray which is adapted both for use as a one-off mould and as a protection for a perimetral sealing surface of the filter cartridge a predetermined quantity of a sealant in liquid or pasty form; and sinking an end portion of a filter medium, and an end portion of a casing adapted also to serve as a frame for the filter medium into the sealant in the mould at least before it has completely cured or set so that when the curing or setting of the sealant is complete a unitary filter cartridge consisting of the frame, the filter medium and the sealant results, the filter medium being fully enclosed in the resulting packing enclosure defined by the casing and the protective tray detachable prior to uae.
The invention is hereinafter more particularly described by way of example only with reference to the accompanying drawings, in which:-Fig. 1 is a perspective view of an embodiment of combined filter cartridge and package in 2Q accordance with this invention, and Figs. 2, 3 and 4 are similar simplified sectional views illustrating successive stages in the production of the combined filter cartridge and package of Fig. 1.
The panel filter cartridge of Fig. 1 has a casing or frame 1 suitably of paperboard having a panel 3 surrounded by perforation at 2 to define a portion 3 readily removable ~ 9951 by a user. Mounted within the casing or frame 1 is the filter medium 4, here in the form of a pleated paper element with parallel pleats 5 the ends of adjacent pleats being sealed together by a suitable sealing compound. The cartridge is seated within a disposable plastics tray or lid 6 which covers what is the underside of the cartridge in the view of Fig. 1 where the filter medium would otherwise be exposed and protects sealing surfaces 7 around the edge of the said underside.
To place the cartridge in use tray 6 is detached and a perforated section 3 on the upper surface (in Fig. 1) of the casing 1 is removed the cartridge can then function as a conventional panel filter.
The tray or lid 6 and the casing 1 together serve as a packaging container without need for an additional paperboard carton. Fitting instructions, trade marks and other identif'i-cation are printed on the casing.
Reference is now made to Figs. 2, 3 and 4 which schematic-ally illustrate how the packaged filter cartridge of Fig. 1 is produced.
As the sectional view Pf Fig. 2 shows, tray 6 is of a plastics material and has a well 8 defined between its circum-extending upstandir,g wall 9 and a centrally disposed raised portion 10. Tray 6 is rectangular in form in the case of the panel f`ilter illustrated in Fig. 1, having four straight well lengths along and adjacent the four edges of the tray , ,~ S
.;i .. i _ ~ _ 11799Sl `` -".
bottom. If the invention is employed in the manufacture Or a cylindrical filter cartridge the well will be annular in form.
.
The filter medium in the present example is a pleated~
paper element ~ormed by a suitable pleating process generally known in the filter making art and durlng this process the ends of the pleats are coated with a settable sealant material 13 so that as they are brought together the ends Or adjacent pleats are se81ed together. The element is dimensioned to fit into casing or frame 1 with the open edge 12 extending outward of the pleats.
A predetermined quantity of the sealant material 11 is dispensed into well 8 in liquid or pasty form so as to fill it to excess as shown in Fig. 3. Various hot melt, ., . _ . , _ . . ._ heat curing and cold cure systems are commercially available for this. Preferably however polyurethane which has a two part mix and a cold cure is used for the sealant. The mould/tray 6 would preferably be made of a material such as cardboard or metal foil, rather than of plastics, if a heat cure or hot melt system were to be employed.
The filter medium which here is in the form of a pleated paper element 4 with parallel pleats 5 is placed into the mould~tray 6 so as to enter into the sealant material (Fig. 4), and the frame or case 1 is placed over the filter medium so that the end portion thereof about its lower open edge 12 sinks into the sealant 11 in well 8.
1179951 -- `
Alternatively, and as presently preferred the filter medium is loaded :-~
Within the frame or case 1, which is then lowered into the mould/tray 6 so that end portions both of the filter material and the frame or case simultaneously sink into the sealant .
11 in well 8 Again, although not shown, the filter medium may be sealed or adhered to the inside of the frame or case in the interests of increased rigidity. In either event the sealant is allowed to set or to complete its cure as appropriate resulting in a unitary filter cartridge as shown -10 in Fig. 1.
The mould which is also described herein as a lid or tray is suitably made of a transparent plastics material so that the sealing surface can readily be inspected. The preferred material for the mould is a laminate of pvc with poiyethylene, the polyethylene being on the interior surface of the mould to facilitate release without use of mould release agents. Alternatively, the mould could be formed of card-board or metal foil or other plastic or rubber material.
Claims (4)
1. A combined filter cartridge and package comprising a two-part packing enclosure consisting of a main casing having an opening and a detachable tray or lid closing the said opening; the casing serving as a frame for a filter medium mounted therewithin, and the tray or lid serving to protect a sealant providing a perimetral sealing surface for the filter cartridge and moulded in situ within said tray or lid, which tray or lid is adapted to be detached for use of said filter cartridge; the casing being united with the filter medium by both said casing and said filter medium extending into and being secured to said sealant, whereby said casing, sealant, and tray or lid fully enclose said filter medium.
2. A combined filter cartridge and package as claimed in Claim 1, wherein the casing has a detachable portion requiring detachment by the user as well as the tray or lid to place the filter cartridge in use.
3. A combined filter cartridge and package as claimed in Claim 2, wherein the detachable portion comprises a panel surrounded by perforations allowing ready removal of the panel by the user.
4. A method for the production of filter cartridges packaged for transport or sale, comprising the steps of: dispensing into a tray which is adapted both for use as a one-off mould and as a protection for a perimetral sealing surface of the filter cartridge a predetermined quantity of a sealant in liquid or pasty form; and sinking an end portion of a filter medium, and an end portion of a casing adapted also to serve as a frame for the filter medium into the sealant in the mould at least before it has completely cured or set so that when the curing or setting of the sealant is complete a unitary filter cartridge consisting of the frame, the filter medium and the sealant results, the filter medium being fully enclosed in the resulting packing enclosure defined by the casing and the protective tray detachable prior to use.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8030554 | 1980-09-22 | ||
| GB8030554 | 1980-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1179951A true CA1179951A (en) | 1984-12-27 |
Family
ID=10516211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000386263A Expired CA1179951A (en) | 1980-09-22 | 1981-09-21 | Filters and their manufacture |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4373635A (en) |
| EP (1) | EP0048608A1 (en) |
| BR (1) | BR8106064A (en) |
| CA (1) | CA1179951A (en) |
| ES (1) | ES268717Y (en) |
| GB (1) | GB2084040B (en) |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK147275C (en) * | 1982-02-23 | 1984-12-03 | Coloplast As | FILTER FOR OSTOMIPOS |
| US4765810A (en) * | 1987-06-08 | 1988-08-23 | Clean Room Technology | Testable gasket seal arrangement |
| US4898602A (en) * | 1988-03-28 | 1990-02-06 | Gruber Thomas J | Selectively openable filtering assembly |
| US4963171A (en) * | 1989-11-02 | 1990-10-16 | Donaldson Company, Inc. | High efficiency filter and method of fabricating same |
| AU6745290A (en) * | 1990-06-19 | 1992-01-07 | Allied-Signal Inc. | Filter and process for manufacturing a filter |
| KR930005705Y1 (en) * | 1990-12-10 | 1993-08-27 | 삼성전자 주식회사 | Air filter |
| GB9202781D0 (en) * | 1992-02-11 | 1992-03-25 | Btr Plc | Improvements in and relating to filters |
| DE4327834C2 (en) * | 1993-08-19 | 1998-05-28 | Mann & Hummel Filter | Air filters for the interior of motor vehicles |
| US6099293A (en) * | 1998-04-15 | 2000-08-08 | Bacou Usa Safety, Inc. | Apparatus for manufacturing a respirator cartridge seal |
| US6126707A (en) * | 1999-03-05 | 2000-10-03 | 3M Innovative Properties Company | Disposable air filter with improved frame |
| US20040074215A1 (en) * | 2000-11-10 | 2004-04-22 | Carlo Cocconi | Method for making an air filter |
| CA2516007C (en) | 2003-02-11 | 2014-09-02 | Donaldson Company, Inc. | Air cleaner arrangements; serviceable filter elements; and, methods |
| GB2411367B (en) * | 2004-02-17 | 2008-06-04 | Nationwide Filter Company | Filter unit |
| US20110197556A1 (en) | 2004-11-02 | 2011-08-18 | Baldwin Filters, Inc. | Filter element |
| CN102512889B (en) | 2005-01-13 | 2015-11-25 | 唐纳森公司 | Air filter cartridge and air cleaner assembly |
| DE202006011989U1 (en) | 2006-08-03 | 2007-12-20 | Mann + Hummel Gmbh | Air filter element with covered end plates |
| CN102574043B (en) * | 2009-10-14 | 2015-04-29 | 唐纳森公司 | Filter cartridge with seal member and methods |
| US9039801B2 (en) * | 2012-05-01 | 2015-05-26 | Camfil Usa, Inc. | Filter holding frame with filter gasket |
| US9970394B2 (en) | 2012-07-25 | 2018-05-15 | Baldwin Filters, Inc. | Filter housing, fluted filter and safety filter |
| WO2015060996A1 (en) * | 2013-10-21 | 2015-04-30 | Cummins Filtration Ip, Inc. | Filter with bidirectional pleated media |
| WO2016044293A1 (en) | 2014-09-15 | 2016-03-24 | Donaldson Company, Inc. | Filter cartridges; air cleaner assemblies; housings; features; components; and, methods |
| US9682339B2 (en) | 2015-01-23 | 2017-06-20 | Rps Products, Inc. | Collapsible filter with support structure |
| DE102015111758A1 (en) * | 2015-07-20 | 2017-01-26 | Wolf Pvg Gmbh & Co. Kg | Method for producing a seal and filter with a seal |
| JP7018018B2 (en) | 2016-02-19 | 2022-02-09 | ボールドウィン・フィルターズ・インコーポレーテッド | Surface coated filters and methods |
| US10682597B2 (en) | 2016-04-14 | 2020-06-16 | Baldwin Filters, Inc. | Filter system |
| US10286351B2 (en) | 2017-04-19 | 2019-05-14 | Rps Products, Inc. | Filter with flexible side seal |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2138874A (en) * | 1936-03-05 | 1938-12-06 | Owens Illinois Glass Co | Filter unit |
| GB1022232A (en) * | 1961-06-12 | 1966-03-09 | Clarke Chapman Ltd | Improvements in filters for air and other gases |
| US3183286A (en) * | 1961-07-31 | 1965-05-11 | American Air Filter Co | Method of making unit filter assemblies |
| GB1036323A (en) * | 1963-08-20 | 1966-07-20 | Farr Co | Method of manufacturing a pleated air filter cartridge |
| GB1121896A (en) * | 1966-07-21 | 1968-07-31 | Gen Motors Ltd | Air filters |
-
1981
- 1981-09-21 EP EP81304313A patent/EP0048608A1/en not_active Ceased
- 1981-09-21 CA CA000386263A patent/CA1179951A/en not_active Expired
- 1981-09-22 GB GB8128653A patent/GB2084040B/en not_active Expired
- 1981-09-22 BR BR8106064A patent/BR8106064A/en unknown
- 1981-09-22 ES ES1981268717U patent/ES268717Y/en not_active Expired
- 1981-09-30 US US06/307,043 patent/US4373635A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB2084040B (en) | 1984-08-15 |
| ES268717Y (en) | 1983-12-01 |
| EP0048608A1 (en) | 1982-03-31 |
| US4373635A (en) | 1983-02-15 |
| ES268717U (en) | 1983-06-01 |
| GB2084040A (en) | 1982-04-07 |
| BR8106064A (en) | 1982-06-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |