DK156031B - Fremgangsmaade til dannelse af en korrugeret filterbane samt apparat til udoevelse af fremgangsmaaden - Google Patents
Fremgangsmaade til dannelse af en korrugeret filterbane samt apparat til udoevelse af fremgangsmaaden Download PDFInfo
- Publication number
- DK156031B DK156031B DK193780AA DK193780A DK156031B DK 156031 B DK156031 B DK 156031B DK 193780A A DK193780A A DK 193780AA DK 193780 A DK193780 A DK 193780A DK 156031 B DK156031 B DK 156031B
- Authority
- DK
- Denmark
- Prior art keywords
- web
- folding
- corrugated
- corrugations
- folds
- Prior art date
Links
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/012—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
- B01D29/07—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/111—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/15—Supported filter elements arranged for inward flow filtration
- B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
-
- 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
- B01D46/0001—Making filtering elements
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- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
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- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
- B29C63/04—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like
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- B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/133—Fin-type joints, the parts to be joined being flexible
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- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
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- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/8322—Joining or pressing tools reciprocating along one axis
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- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
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- 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
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Description
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Den foreliggende opfindelse angår en fremgangsmåde af den i indledningen til krav 1 angivne art.
Fra US patentskrift nr. 3 038 718 kendes en arkfoldningsmaskine, ved hvilken en bane af arkmateriale føres 5 gennem en foldedanner mellem øvre og nedre vifteformet konvergerende lige blade eller lister, som gradvis indgriber mere i mellemrummene mellem hinanden, og som derved gradvis folder banen til en korrugeret facon. Ved denne maskine forekommer der navnlig nær foldedannerens afgangsende en 10 stor friktion mellem banematerialet og bladene eller listerne. Denne maskine er derfor kun betinget anvendelig til korrugering af en filterbane, idet den dels kræver en sådan overrivnings- eller trækstyrke hos banen, som kun et fåtal af filtermaterialer besidder, dels på grund af den glidende 15 friktion mellem banen og bladene eller listerne vil være tilbøjelig til at glitte banematerialet og dermed mere eller mindre tillukke porerne i filtermaterialet.
Formålet for den foreliggende opfindelse er at undgå ulemperne ved den nævnte maskine og at tilvejebringe en 20 fremgangsmåde, med hvilken der af gængs filtermateriale kan dannes en korrugeret filterbane, uden at banen rives op eler over, og uden at filtermaterialet glittes.
Dette opnås ifølge opfindelsen ved det i den kendetegnende del af krav 1 angivne.
25 Ved først at forsyne banen med foldelinier svarende til de tilsigtede folder opnår man en minimering af de kræfter, der senere skal påføres banen til dannelse af folderne, således at disse kan dannes i foldedanneren med en minimum af friktion mellem denne og banen. Da banen tilføres den 30 buede føring i slæk tilstand, kan føringen let forme banen korrekt således, at foldelinierne ved foldedannerens bueformede tilgangsende kommer til at ligge ud for de mellem hinanden indgribende øvre og nedre foldedannende organer, der er indrettet til kun at udøve ringe friktionsmodstand mod banens 35 passage.
Opfindelsen angår tillige et apparat til udøvelse af 2
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fremgangsmåden ifølge opfindelsen og af den i indledningen til krav 2 angivne art, hvilket apparat er ejendommeligt ved det i den kendetegnende del af kravet angivne.
Foretrukne træk hos apparatet ifølge opfindelsen er 5 angivet i kravene 3 og 4.
Opfindelsen skal i det følgende beskrives nærmere ud fra en foretrukken udførelsesform for apparatet ifølge opfindelsen, idet der henvises til tegningen, på hvilken fig. 1 viser et korrugeringsapparat ifølge opfindelsen 10 set ovenfra, fig. 2 et længdesnit gennem den vifteformede foldedanner langs linien 2-2 i fig. 1 og set i retning af pilene, fig. 3 et tværsnit af den vifteformede foldedanner i fig. 1 langs linien 3-3 i fig. 1 ved tilgangsenden og set i 15 retning af pilene, fig. 4 et tværsnit af den vifteformede foldedanner i fig. 1 langs linien 4-4 i fig. 1 ved midterdelen og set i retning af pilene, og fig. 5 et tværsnit af den vifteformede foldedanner i 20 fig. 1 langs linien 5-5 i fig* 1 ved afgangsenden og set i retning af pilene.
Det i fig. 1 til 5 viste korrugeringsapparat har en vifteformet foldedanner 10 med en bueformet omkreds ved tilgangsenden 11, hvor den er forholdsvis plan, og en buefor-25 met afgangsende 12, hvis tværsnitsudformning (der bedst ses i fig. 5) svarer til den tilstræbte, korrugerede udformning af filterbanen 1. Foldedanneren 10 er betegnet som vifteformet, fordi antallet af endelige korrugeringsfolder 15 ved afgangsenden 12 gradvis forøges i højde og aftager i bredde 30 fra tilgangsenden 11 hvilket medfører en væsentlig snævrere afgangsende 12. Korrugeringsfolderne 15 er sammensat af skiftende spidser 13 og fordybede dele 14 set ovenfra, men spidserne 13 bliver fordybede dele 14, og de fordybede dele 14 bliver spidser 13, når de betragtes fra den modsatte 35 side af foldeformgiveren, fordi begge er forsat i retning udad fra sidemidterlinien af foldeformgiveren til tilnærmel- 3
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sesvis den samme afstand. I virkeligheden er spidserne 13 skudt op fra midterlinien, og de fordybede dele 14 ned fra midteriinien med det resultat, at den vifteformede foldedanner 10 har det samme profiludseende fra begge sider og kan 5 anvendes til formning af banen med begge sider vendende opad som vist i fig. 1.
Det vil fremgå af fig. 1, at samtidig med at korruger ingsfolderne 15 forøges i højde, aftager de også i bredde, således at afstanden mellem dem formindskes, og selve folder-10 ne 15 bliver smallere fra tilgangsenden i retning mod afgangsenden. Resultatet af denne udformning er, at et banemateriale, der tilpasser sig til overfladen af foldedanneren, trækkes ind fra siderne og samtidig skydes op og ned langs spidserne og de fordybede dele af foldedanneren og således 15 gradvis opnår den i fig. 5 viste korrugerede facon.
Mens der i den i fig. 1 viste foldedanner er seks spidser og seks fordybninger til i alt tolv bølger og seks korrugeringsfolder, kan der naturligvis være et hvilket som helst ønsket antal og størrelse af korrugeringer svarende 20 til overfladearealet af den ønskede filterbane. Folderne kan endvidere have enhver ønsket højde og dybde. Jo større højden eller dybden, dvs. amplituden, er af folderne, des bredere en bane kræves til korrugering, og jo større er forskellen mellem bredden af foldedanneren ved tilgangsenden 25 og dens bredde ved afgangsenden.
Foldedanneren kan være fremstillet af et hvilket som helst egnet materiale. Fortrinsvis er det et, som frembyder en så lav friktionsmodstand mod filterbanematerialet som muligt. Lavfriktionsmaterialer, dvs. glatglidende plastmate-30 rialer såsom polytetrafluorethylen, polytrifluorchloroethylen og polyamider foretrækkes, men andre lavfriktionsplastmaterialer kan anvendes incl. polypropylen, polyethylen, polycar-bonat, polyoxymethylen og polyisobutylen. Metaller kan ligeledes anvendes såsom aluminium, rustfrit stål og titaniumle-35 geringer. Metaller er imidlertid mere vanskelige at forme til den tilstræbte vifteformede, bølgeformede udformning,
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4 mens plastmaterialer let udformes således ved støbning eller presning. Plastbeklædte metaller kan ligeledes anvendes.
Med henblik på at opnå bølger af samme længde og amplitude med en gradvis tiltagende amplitude fra tilgangs-5 til afgangsenden, som er en forudsætning for langsgående korrugering, er det nødvendigt at tilgangs- og afgangsendeme af bølgerne beskriver en bue, hvis krumningsradius i det mindste er lig med længden af bølgerne fra deres tilgangstil deres afgangsender. Den bueformede omkreds af bølgerne 10 har følgelig en radius i den cirkel, hvis centrum er det fælles samlingspunkt (opnået ved ekstrapolation) uden for afgangsenden for midteriinierne af bølgerne i foldeformgiveren.
Filterbanematerialet 1, som skal korrugeres i folde-15 danneren, foreligger forud tildannet i strimmelform og kan bæres på en forrådsrulle 2. Hvis banen formes kontinuerligt ved ekstrudering, koagulation eller udskillelse, som det er tilfældet ved filtermembranbaner, er forrådet naturligvis unødvendigt og kan udelades. Et par drevne cylindriske valser 20 3 og 4 trækker filterbanematerialet fra forrådsrullen 2 (eller, hvis dette anvendes, fra det kontinuerlige baneformningsapparat) ind i mellemrummet mellem valserne. Disse valser er udformet med vekselvise kamme eller hævede partier 5 og riller eller fordybede partier 6 med kammene på den ene 25 valse sammenparret med og trængende ind i rillerne i den anden valse med henblik på at indtrykke foldelinier 7 i filterbanematerialet 1. Mellemrummene mellem kammene 5 og rillerne 6 svarer følgelig til mellemrummene mellem bølgerne ved tilgangsenden af foldedanneren. Pålæggeisen af foldeli-30 nier letter i høj grad foldningen af filterbanematerialet i foldedanneren. Mens kammene 5 og rillerne 6 kan have en hvilken som helst facon, er de fortrinsvis afrundede og sammentrykker kun filterbanematerialet, der føres derigennem, i den udstrækning og i det omfang det er nødvendigt for at 35 lette foldningen langs de resulterende linier, der påføres banen, idet unødvendig sammentrykning formindsker det åbne 5
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volumen og derfor porøsiteten.
For så vidt som filterbanematerialet kommer ud fra valserne 3 og 4 med en i det væsentlige plan profil med undtagelse af foldelinierne 7, er det nødvendigt at tvinge 5 banen til at ændre sin profil tilstrækkeligt til at sætte den i stand til at bøje eller bukke, når den trænger ind i den bueformede tilgangsende 11 af den vifteformede foldedanner. Dette opnås med en buet føring 8, som er anbragt et kort stykke før banen når den bueformede omkreds. For at 10 gennemgå den buede føring uden beskadigelse er det vigtigt, at banematerialet er løst eller slækt, mens det bevæger sig fra valserne 3 og 4 til føringen 8. Dette opnås ved at tilvejebringe overskydende banemateriale i dette mellemrum og fremføre materialet gennem de drevne valser 3 og 4 til førin-15 gen 8 med en hastighed, der er den samme som den trukne hastighed for passagen af banematerialet gennem foldedanneren 10, således at materialet tilføres til tilgangsenden så hurtigt som det passerer gennem foldedanneren, og slækket således opretholdes.
20 Med henblik på at tvinge filterbanematerialet til at trænge ind i de fordybede dele 14 af foldedanneren hele vejen til bunden af disse, og samtidig tilpasse filterbanematerialet tæt til spidserne af de hævede partier 13, er det nødvendigt at trykke filterbanematerialet ned i de fordybede 25 partier. Dette opnås ved vægten af længder 16 af bøjelig kæde, som ved deres vægt hjælper til at tilpasse banen til den bølgede kontur af foldedannerens overflade med et lavt friktionstræk. Kæderne er sammensat af et antal kugler, der er svingeligt ledforbundet med stive stænger, og som har 30 glatte overflader for at undgå beskadigelse af filterbanen. Vægten af kæderne er tilstrækkelig til at trykke filterbanen tæt imod overfladen af foldedanneren med det resultat, at filterbanematerialet trænger ind i og berører bunden af rillerne 14 og toppene af spidserne 13 i overfladen af folde-35 danneren fra tilgangsenden til afgangsenden, således at banen på det tidspunkt, den har nået afgangsenden, befinder 6
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sig i korrugeret facon. Som angivet lettes foldningen omkring spidserne og inden i bunden af de fordybede partier af de forud pålagte foldelinier 7 i mellemrummet mellem valserne 3 og 4.
5 Som det bedst ses i fig. 2 er tilgangsendeme af kæderne forankret i riller 18 i skiver 17.
Den korrugerede filterbane 1 er, idet den udgår fra afgangsenden 12 af foldedanneren, korrugeret med korruge-ringsfolderne skubber tæt imod hinanden med kun en lille 10 frigang derimellem. Korrugeringsfolderne er absolut ensartede på grund af den tætte tilpasning af banen til overfladen af foldedanneren med det resultat, at der ikke er nogen betydelige variationer i højde eller bredde af folderne, og det korrugerede banemateriale, som er frembragt, er derfor ens-15 artet med hensyn til filtreringskarakteristika over hele dets overfladeareal i modsætning til tidligere korrugerede materialer, der er frembragt ved anvendelse af tværgående korrugeringsapparater.
Claims (4)
1. Fremgangsmåde til dannelse af en korrugeret filterbane ved foldning af et baneformet filtermateriale til korruger inger, som strækker sig i banens længderetning, og ved 5 hvilken banen (1) ved hjælp af en buet føring (8) tilføres den brede, bueformede tilgangsende (11) af en vifteformet foldedanner (10), hvori banen gradvis foldes til dannelse af korrugeringerne ved at passere mellem i mellemrum mellem hinanden indgribende, konvergerende øvre (16) og nedre (15) 10 foldedannende organer, og fra hvis afgangsende (12) den korrugerede bane (1), der nu har mindre bredde, aftrækkes, kendetegnet ved, at banen først forsynes med til de tilsigtede folder svarende foldelinier (7) og derpå i slæk tilstand og i det væsentlige lodret hængende tilføres 15 den buede føring (8), ombøjes 90° og føres til den i det væsentlige vandrette foldedanner (10), hvor de foldedannende organer (15,16) kun udøver en ringe friktionsmodstand mod banens (1) passage.
2. Apparat til udøvelse af fremgangsmåden ifølge 20 krav 1 og omfattende en vifteformet foldedanner (10) med konvergerende, i mellemrum mellem hinanden indgribende, foldedannende organer (15,16), der er indrettet til at meddele en bane(l) af filtermateriale, som føres gennem folde-danneren (10) fra dennes brede, bueformede tilgangsende 25 (11) til dens afgangsende (12), korrugeringsfolder med grad vis tiltagende højde og aftagende bredde, og med en buet føring (8) foran tilgangsenden (11) til tilførsel af banen (1) til denne samt organer indrettet til at aftrække den korrugerede bane (1) fra foldedannerens (10) afgangsende 30 (12), kendetegnet ved, at foldedanneren (10) omfat ter en i det væsentlige vandret, bølgeformet underlagsflade til understøtning af banen (1) og med et antal korruger inger (15) med spidser (13) og fordybede dele (14), hvilke kor rangeringer (15) gradvis aftager i bredde og tiltager i højde 35 fra tilgangsenden (11) til afgangsenden (12), og et antal trykorganer (16), der er indrettet til at ligge an imod DK 156031 B banens (1) overside og ved deres vægt trykke denne ned mod underlagsfladens fordybede dele (14), idet underlagsfladen og trykorganerne er indrettet til kun at frembyde lille friktionsmodstand mod banens (1) bevægelse gennem foldedan-5 neren (10), og foran føringen (8r18) anbragte tilførselsorganer (3,4) for banen (1) og prægningsorganer (5,6), der er indrettet til at præge foldelinier (7) i banen svarende til de tilstræbte folder, og hvor tilførselsorganerne (3,4) er indrettet til »t tilføre banen (17) i slæk tilstand til 10 føringen (8).
3. Apparat ifølge krav 2, kendetegnet ved, at tilførselsorganerne er et par drevne valser (3,4), som hver er forsynet med et antal vekslende kamme (5) og riller (6), der i de to valser (3,4) passer ind i hinanden og ligger 15 ud for de tilsigtede foldelinier (7) i banen (1).
4. Apparat ifølge krav 2 eller 3, kendetegnet ved, at trykorganerne er længder (16) af en kugleledskæde med en glat overflade.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/035,146 US4252591A (en) | 1979-05-02 | 1979-05-02 | Corrugating apparatus and process |
US3514679 | 1979-05-02 |
Publications (3)
Publication Number | Publication Date |
---|---|
DK193780A DK193780A (da) | 1980-11-03 |
DK156031B true DK156031B (da) | 1989-06-19 |
DK156031C DK156031C (da) | 1989-11-06 |
Family
ID=21880937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK193780A DK156031C (da) | 1979-05-02 | 1980-05-01 | Fremgangsmaade til dannelse af en korrugeret filterbane samt apparat til udoevelse af fremgangsmaaden |
Country Status (17)
Country | Link |
---|---|
US (1) | US4252591A (da) |
EP (1) | EP0018610B1 (da) |
JP (1) | JPS5953084B2 (da) |
AT (1) | ATE4444T1 (da) |
AU (1) | AU520305B2 (da) |
BR (1) | BR8002697A (da) |
CA (1) | CA1135165A (da) |
DE (1) | DE3064567D1 (da) |
DK (1) | DK156031C (da) |
ES (1) | ES8103658A1 (da) |
FI (1) | FI65210C (da) |
IL (1) | IL59908A (da) |
MX (1) | MX149510A (da) |
NO (1) | NO152359C (da) |
NZ (1) | NZ193574A (da) |
PT (1) | PT71163A (da) |
ZA (1) | ZA802652B (da) |
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- 1979-05-02 US US06/035,146 patent/US4252591A/en not_active Expired - Lifetime
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- 1980-04-21 MX MX182031A patent/MX149510A/es unknown
- 1980-04-23 IL IL5990880A patent/IL59908A/xx unknown
- 1980-04-25 AT AT80102255T patent/ATE4444T1/de not_active IP Right Cessation
- 1980-04-25 DE DE8080102255T patent/DE3064567D1/de not_active Expired
- 1980-04-25 EP EP19800102255 patent/EP0018610B1/en not_active Expired
- 1980-04-28 FI FI801362A patent/FI65210C/fi not_active IP Right Cessation
- 1980-04-29 PT PT7116380A patent/PT71163A/pt unknown
- 1980-04-30 NO NO801265A patent/NO152359C/no unknown
- 1980-04-30 BR BR8002697A patent/BR8002697A/pt unknown
- 1980-04-30 ES ES491080A patent/ES8103658A1/es not_active Expired
- 1980-04-30 NZ NZ19357480A patent/NZ193574A/xx unknown
- 1980-04-30 AU AU57940/80A patent/AU520305B2/en not_active Ceased
- 1980-05-01 DK DK193780A patent/DK156031C/da not_active IP Right Cessation
- 1980-05-01 JP JP55058576A patent/JPS5953084B2/ja not_active Expired
- 1980-05-01 CA CA000351089A patent/CA1135165A/en not_active Expired
- 1980-05-02 ZA ZA00802652A patent/ZA802652B/xx unknown
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Also Published As
Publication number | Publication date |
---|---|
EP0018610B1 (en) | 1983-08-17 |
ES491080A0 (es) | 1981-03-16 |
AU520305B2 (en) | 1982-01-21 |
NO801265L (no) | 1980-11-03 |
CA1135165A (en) | 1982-11-09 |
NO152359B (no) | 1985-06-10 |
DE3064567D1 (en) | 1983-09-22 |
JPS55149618A (en) | 1980-11-21 |
NO152359C (no) | 1985-09-18 |
IL59908A (en) | 1982-08-31 |
NZ193574A (en) | 1983-06-17 |
US4252591A (en) | 1981-02-24 |
JPS5953084B2 (ja) | 1984-12-22 |
DK156031C (da) | 1989-11-06 |
MX149510A (es) | 1983-11-16 |
ATE4444T1 (de) | 1983-08-15 |
DK193780A (da) | 1980-11-03 |
ZA802652B (en) | 1981-05-27 |
AU5794080A (en) | 1980-11-06 |
BR8002697A (pt) | 1980-12-16 |
FI65210C (fi) | 1984-04-10 |
FI65210B (fi) | 1983-12-30 |
ES8103658A1 (es) | 1981-03-16 |
FI801362A (fi) | 1980-11-03 |
PT71163A (en) | 1980-05-01 |
EP0018610A1 (en) | 1980-11-12 |
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PUP | Patent expired |