DE1468318A1 - Verfahren zur Filtration von Kunstseide- und Kunstfolien-Spinnmassen mittels Filterflaechen,auf die ein Anschwemmittel aufgegeben wird - Google Patents
Verfahren zur Filtration von Kunstseide- und Kunstfolien-Spinnmassen mittels Filterflaechen,auf die ein Anschwemmittel aufgegeben wirdInfo
- Publication number
- DE1468318A1 DE1468318A1 DE1964M0060991 DEM0060991A DE1468318A1 DE 1468318 A1 DE1468318 A1 DE 1468318A1 DE 1964M0060991 DE1964M0060991 DE 1964M0060991 DE M0060991 A DEM0060991 A DE M0060991A DE 1468318 A1 DE1468318 A1 DE 1468318A1
- Authority
- DE
- Germany
- Prior art keywords
- filter
- filtration
- filter aid
- separation
- takes place
- 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.)
- Granted
Links
- 238000001914 filtration Methods 0.000 title claims description 50
- 238000000034 method Methods 0.000 title claims description 35
- 229920000297 Rayon Polymers 0.000 title claims description 20
- 239000002964 rayon Substances 0.000 title claims description 7
- 238000009987 spinning Methods 0.000 title claims description 7
- 239000000835 fiber Substances 0.000 claims description 15
- 239000008187 granular material Substances 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 11
- 230000008961 swelling Effects 0.000 claims description 11
- 238000005188 flotation Methods 0.000 claims description 9
- 238000010908 decantation Methods 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- 229920002678 cellulose Polymers 0.000 claims description 6
- 239000001913 cellulose Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000004800 polyvinyl chloride Substances 0.000 claims description 6
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 6
- 238000004090 dissolution Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 150000007513 acids Chemical class 0.000 claims description 2
- 239000010425 asbestos Substances 0.000 claims description 2
- 239000002657 fibrous material Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 239000000356 contaminant Substances 0.000 claims 2
- YBYIRNPNPLQARY-UHFFFAOYSA-N 1H-indene Chemical compound C1=CC=C2CC=CC2=C1 YBYIRNPNPLQARY-UHFFFAOYSA-N 0.000 claims 1
- WUBBRNOQWQTFEX-UHFFFAOYSA-N 4-aminosalicylic acid Chemical compound NC1=CC=C(C(O)=O)C(O)=C1 WUBBRNOQWQTFEX-UHFFFAOYSA-N 0.000 claims 1
- 101100321000 Mus musculus Ypel3 gene Proteins 0.000 claims 1
- 239000012752 auxiliary agent Substances 0.000 claims 1
- 239000003518 caustics Substances 0.000 claims 1
- 238000005119 centrifugation Methods 0.000 claims 1
- 239000003610 charcoal Substances 0.000 claims 1
- 210000001331 nose Anatomy 0.000 claims 1
- 239000000843 powder Substances 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 238000004537 pulping Methods 0.000 claims 1
- 238000010334 sieve classification Methods 0.000 claims 1
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical class S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000008929 regeneration Effects 0.000 description 10
- 238000011069 regeneration method Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 235000011121 sodium hydroxide Nutrition 0.000 description 4
- 239000012991 xanthate Substances 0.000 description 4
- 229920003043 Cellulose fiber Polymers 0.000 description 3
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
- KRQUFUKTQHISJB-YYADALCUSA-N 2-[(E)-N-[2-(4-chlorophenoxy)propoxy]-C-propylcarbonimidoyl]-3-hydroxy-5-(thian-3-yl)cyclohex-2-en-1-one Chemical compound CCC\C(=N/OCC(C)OC1=CC=C(Cl)C=C1)C1=C(O)CC(CC1=O)C1CCCSC1 KRQUFUKTQHISJB-YYADALCUSA-N 0.000 description 1
- IJJWOSAXNHWBPR-HUBLWGQQSA-N 5-[(3as,4s,6ar)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]-n-(6-hydrazinyl-6-oxohexyl)pentanamide Chemical compound N1C(=O)N[C@@H]2[C@H](CCCCC(=O)NCCCCCC(=O)NN)SC[C@@H]21 IJJWOSAXNHWBPR-HUBLWGQQSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 229920002955 Art silk Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 229920000426 Microplastic Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 235000013601 eggs Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F13/00—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like
- D01F13/02—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like of cellulose, cellulose derivatives or proteins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/04—Controlling the filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/02—Loose filtering material, e.g. loose fibres
- B01D39/04—Organic material, e.g. cellulose, cotton
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D41/00—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids
- B01D41/02—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids of loose filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D41/00—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids
- B01D41/04—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids of rigid self-supporting filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/261—Synthetic macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3425—Regenerating or reactivating of sorbents or filter aids comprising organic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3458—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase
- B01J20/3466—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase with steam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3475—Regenerating or reactivating using a particular desorbing compound or mixture in the liquid phase
-
- 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
- D01D1/00—Treatment of filament-forming or like material
- D01D1/10—Filtering or de-aerating the spinning solution or melt
- D01D1/106—Filtering
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Filtering Materials (AREA)
- Artificial Filaments (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Filtration Of Liquid (AREA)
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH662163A CH407950A (de) | 1963-05-28 | 1963-05-28 | Verfahren zur Filtration von schwerfiltrierbaren Flüssigkeiten |
| CH696263A CH415555A (de) | 1963-06-05 | 1963-06-05 | Verfahren zur Filtration von Flüssigkeiten mit Hilfe leicht regenerierbarer Filterhilfsmittel |
| CH900463A CH436241A (de) | 1963-07-17 | 1963-07-17 | Verfahren zur Regeneration von Anschwemm-Mitteln aus der Viskose-Filtration |
| CH950463A CH467808A (de) | 1963-05-28 | 1963-07-30 | Verfahren zur Regeneration von Anschwemmitteln aus der Viskose-Filtration |
| CH1429163A CH466852A (de) | 1963-05-28 | 1963-11-20 | Verfahren zur Regeneration von Anschwemm-Filtermittel aus der Viskose-Filtration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1468318A1 true DE1468318A1 (de) | 1969-02-20 |
Family
ID=27509279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1964M0060991 Granted DE1468318A1 (de) | 1963-05-28 | 1964-05-13 | Verfahren zur Filtration von Kunstseide- und Kunstfolien-Spinnmassen mittels Filterflaechen,auf die ein Anschwemmittel aufgegeben wird |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3362533A (enExample) |
| AT (1) | AT271712B (enExample) |
| BE (1) | BE647908A (enExample) |
| CH (2) | CH467808A (enExample) |
| DE (1) | DE1468318A1 (enExample) |
| GB (1) | GB1056321A (enExample) |
| NL (1) | NL142999B (enExample) |
| NO (1) | NO121330B (enExample) |
| SE (1) | SE321046B (enExample) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3578163A (en) * | 1969-03-24 | 1971-05-11 | United States Filter Corp | Method and apparatus for precoating filter leaves |
| CH511629A (fr) * | 1969-03-27 | 1971-08-31 | Brasco Sa | Appareil de filtration d'un fluide sous pression |
| BE751298R (fr) * | 1969-07-09 | 1970-11-16 | Muller Hans Dr | Procede de filtration de masses de filage de feuilles synthetiques et de soie artificielle par des surfaces filtrantes chargees d'un agent |
| US3677406A (en) * | 1970-09-25 | 1972-07-18 | Stauffer Chemical Co | Filter aid slurry metering process |
| GB1383818A (en) * | 1971-03-12 | 1974-02-12 | Bayer Ag | Filtration method |
| US4259095A (en) * | 1979-09-26 | 1981-03-31 | Johnson Jr Allen S | Bag-type filter apparatus with combination bag support and air diffuser |
| US4501670A (en) * | 1981-12-23 | 1985-02-26 | Tyson William H | Recovery of oil and sulfonate from filter cake |
| US4772399A (en) * | 1983-06-20 | 1988-09-20 | Claypro Usa | Recovery of succinimides from filter cakes |
| WO1994008693A1 (de) * | 1992-10-08 | 1994-04-28 | Sofima Ag | Verfahren und vorrichtung zum trennen von ablagerungen von filterhilfsstoffen |
| US5801051A (en) * | 1994-02-10 | 1998-09-01 | Filtrox-Werk Ag | Method and apparatus for cleaning a filter aid |
| DE19534102C2 (de) * | 1995-09-14 | 2001-11-08 | Peter Anthony Miller | Verfahren und Vorrichtung zur Tiefenfiltration von Flüssigkeiten |
| CN104233494B (zh) * | 2014-09-11 | 2016-04-27 | 江苏三房巷实业股份有限公司 | 粘胶金属纤维的制造方法及装置 |
| CN107488883B (zh) * | 2017-08-07 | 2018-05-29 | 安徽嘉明新材料科技有限公司 | 一种基于熔体纺丝法生产涤纶高强丝的工艺 |
| CN107812401A (zh) * | 2017-11-20 | 2018-03-20 | 宜宾丝丽雅股份有限公司 | 一种用于粘胶纤维废碱液的预处理工艺 |
| FR3075227B1 (fr) * | 2017-12-18 | 2020-11-13 | Association Pour Le Developpement De Lenseignement Et Des Recherches Aupres Des Univ Des Centres De | Procede de fabrication d’une fibre de carbone a partir de coton recycle et utilisation de la fibre ainsi obtenue pour la formation d’un article en materiau composite |
| CN114307395A (zh) * | 2021-11-11 | 2022-04-12 | 荣成碳纤维科技有限公司 | 聚丙烯腈基碳纤维干喷湿纺专用精密滤片高效清洗方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA622599A (en) * | 1961-06-27 | Muller Hans | Filtration with aftertreatment of residues | |
| US3023893A (en) * | 1962-03-06 | Process for separating particles of solid x | ||
| US2020693A (en) * | 1931-04-03 | 1935-11-12 | Texas Co | Method of filter-aid dewaxing hydrocarbon oils |
| US2055869A (en) * | 1932-03-11 | 1936-09-29 | F W Manning Company | Process of filtration |
| US2607954A (en) * | 1950-06-17 | 1952-08-26 | Celanese Corp | Method and apparatus for forming gel-free thermoplastic films |
| FR1190296A (fr) * | 1957-02-05 | 1959-10-12 | Dispositif pour la séparation continue de matières solides et de liquides par filtration | |
| US2971648A (en) * | 1957-06-19 | 1961-02-14 | Union Tank Car Co | Method and apparatus for controlling the feed of filter aid to a filter arrangement |
-
1963
- 1963-07-30 CH CH950463A patent/CH467808A/de unknown
- 1963-11-20 CH CH1429163A patent/CH466852A/de unknown
-
1964
- 1964-05-13 DE DE1964M0060991 patent/DE1468318A1/de active Granted
- 1964-05-14 BE BE647908D patent/BE647908A/xx unknown
- 1964-05-21 SE SE6145/64A patent/SE321046B/xx unknown
- 1964-05-22 AT AT447664A patent/AT271712B/de active
- 1964-05-22 NO NO153340A patent/NO121330B/no unknown
- 1964-05-27 GB GB21963/64A patent/GB1056321A/en not_active Expired
- 1964-05-28 NL NL646406005A patent/NL142999B/xx not_active IP Right Cessation
- 1964-05-28 US US370942A patent/US3362533A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NL142999B (nl) | 1974-08-15 |
| NO121330B (enExample) | 1971-02-15 |
| NL6406005A (enExample) | 1964-11-30 |
| CH467808A (de) | 1969-01-31 |
| GB1056321A (en) | 1967-01-25 |
| BE647908A (enExample) | 1964-08-31 |
| AT271712B (de) | 1969-06-10 |
| SE321046B (enExample) | 1970-02-23 |
| CH466852A (de) | 1968-12-31 |
| US3362533A (en) | 1968-01-09 |
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