NO137678B - DESIGN OF DEPOT DRAGONS WITH A CORE CONTAINING ACTIVE SUBSTANCE AND COATED WITH A COAT - Google Patents
DESIGN OF DEPOT DRAGONS WITH A CORE CONTAINING ACTIVE SUBSTANCE AND COATED WITH A COAT Download PDFInfo
- Publication number
- NO137678B NO137678B NO1916/72A NO191672A NO137678B NO 137678 B NO137678 B NO 137678B NO 1916/72 A NO1916/72 A NO 1916/72A NO 191672 A NO191672 A NO 191672A NO 137678 B NO137678 B NO 137678B
- Authority
- NO
- Norway
- Prior art keywords
- valve
- dragons
- depot
- coat
- coated
- Prior art date
Links
- 239000013543 active substance Substances 0.000 title 1
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 239000007787 solid Substances 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J3/00—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms
- A61J3/06—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms into the form of pills, lozenges or dragees
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/20—Pills, tablets, discs, rods
- A61K9/2072—Pills, tablets, discs, rods characterised by shape, structure or size; Tablets with holes, special break lines or identification marks; Partially coated tablets; Disintegrating flat shaped forms
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- Medicinal Preparation (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Description
Fremgangsmåte til dosering av smeltet metall. Procedure for dosing molten metal.
Foreliggende oppfinnelse angår en fremgangsmåte til dosering av smeltet metall og angår mere spesielt ventiler til bruk ved kontrollering av en strøm av smeltet metall. The present invention relates to a method for dosing molten metal and more particularly relates to valves for use in controlling a flow of molten metal.
Dosering av smeltet metall til sprøyte-reservoaret i en sprøytestøpemaskin har funnet betydelig oppmerksomhet i denne teknikk. Et eksempel på hvorledes dette kan 'gjøres er angitt i U.S. patent nr. 2 745 153. Dosing of molten metal to the injection reservoir in an injection molding machine has found considerable attention in this technique. An example of how this can be done is set forth in U.S. Pat. patent No. 2,745,153.
Selv om en ventil for dosering av Although a valve for dosing of
smeltet metall som angitt i det foran-nevnte patent i og for seg er utmerket, vil det, når ventilsetet eller ventilen slites eller inntar en usentral stilling kunne finne sted en uønsket lekkasje av smeltet metall gjennom ventilen. molten metal as indicated in the above-mentioned patent is excellent in and of itself, when the valve seat or the valve wears or takes an off-center position, an unwanted leakage of molten metal through the valve could take place.
Foreliggende oppfinnelse går ut på en The present invention is based on a
fremgangsmåte til' dosering av smeltet metall bestående av en legering på basis av aluminium, magnesium eller sink, gjennom en doseringsventil. method for dosing molten metal consisting of an alloy based on aluminium, magnesium or zinc, through a dosing valve.
Fremgangsmåten ifølge oppfinnelsen The method according to the invention
er karakterisert ved at ventilens seteflate holdes på en temperatur innenfor et ønsket område, ved sirkulasjon av et kjøle-medium gjennom en ringformet kanal som er konsentrisk med ventilsetet og anordnet i setelegemet, hvorunder et halvsmeltet lag av metallet som skal doseres, kontinuerlig opprettholdes på doseringsven-tilens seteflate. is characterized by the valve's seat surface being kept at a temperature within a desired range, by circulation of a cooling medium through an annular channel which is concentric with the valve seat and arranged in the seat body, under which a semi-molten layer of the metal to be dosed is continuously maintained on the dosing vein -the seat surface of the tile.
Ifølge oppfinnelsen tilveiebringes der According to the invention, there is provided
et ventilsete som er Innrettet til å oppta en plunger som ved sin ene ende har en ventil eller ventilflate. FajSlfaeftende. til a valve seat adapted to receive a plunger having at one end a valve or valve face. FajSlfaeftende. to
ventilsetet og i tettende kontakt med ventilen når denne befinner seg i lukket stilling, er der et skikt halvsmeltet metall av generelt sørpeformet konsistens. Det er ifølge oppfinnelsen anordnet midler til å holde ventilsetet på en forutbestemt temperatur for å holde det tettende skikt i halvsmeltet tilstand. the valve seat and in sealing contact with the valve when it is in the closed position, there is a layer of semi-molten metal of a generally syrup-like consistency. According to the invention, means are provided to keep the valve seat at a predetermined temperature in order to keep the sealing layer in a semi-melted state.
Oppfinnelsen vil lettere forståes av den følgende beskrivelse av et utførelses-eksempel for oppfinnelsen som er illu-strert på tegningen hvor The invention will be more easily understood from the following description of an embodiment of the invention which is illustrated in the drawing where
fig. 1 viser et sideriss delvis i snitt av en ventil ifølge en utførelsesform for oppfinnelsen. fig. 1 shows a side view, partially in section, of a valve according to an embodiment of the invention.
Fig. 2 er et avbrutt snitt 1 større måle-stokk gjennom den nedre ende av ventilen på fig. 1 og Fig. 2 is an interrupted section 1 larger measuring stick through the lower end of the valve in fig. 1 and
fig. 3 er et snitt etter linjen 3—3 på fig. 3 is a section along the line 3-3 on
fig. 2. fig. 2.
Fig. 1 Viser et ventilaggregat 10 av den type som brukes for trykkstøpning eller sprøytestøpning. Ventilaggregatet 10 omfatter en sylindrisk féring eller innervegg 12 forsynt med en innløpsåpning 14 for Fig. 1 shows a valve assembly 10 of the type used for pressure molding or injection molding. The valve assembly 10 comprises a cylindrical bearing or inner wall 12 provided with an inlet opening 14 for
smeltet metall anordnet mellom endene av féringen. En pafckboks 16 er anordnet ved den øvre ende av féringen og et ventilsete i form av en ring 18 med en sen-tral åpning 20 er amordnet ved foringens nedre ende. En hal vkulef ormet ventil eller ventilflate 22 befinner seg ved den nedre ende av en sylindrisk ventilsplindel 24 hvis øvre del 25 raker gjennom pakkboksen 16 og manøvreres ved hjelp av en passende drivanordning (ikke Vist på tegningen). molten metal arranged between the ends of the ferring. A packing box 16 is arranged at the upper end of the bushing and a valve seat in the form of a ring 18 with a central opening 20 is arranged at the lower end of the bushing. A hal vkulef worm valve or valve face 22 is located at the lower end of a cylindrical valve spline part 24 whose upper part 25 extends through the stuffing box 16 and is maneuvered by means of a suitable drive device (not shown in the drawing).
Nær den nedre endie og omkring ventil-spindelen 24 er det festet diistansestykker 27 som holder den nedre ende av ventil - spindelen i det vesentligste sentrert i ven-tilfdriingen 12. Near the lower end and around the valve spindle 24, distance pieces 27 are attached which keep the lower end of the valve spindle essentially centered in the valve supply 12.
Ventilaggregatet 10 omfatter en var-mekappe 26 og elektriske heteelementer 28. Tilførselsrøret 30 som kommuniserer med åpningen 14 er likeledes forsynt med en kappe og heteelementer. The valve assembly 10 comprises a heating jacket 26 and electric heating elements 28. The supply pipe 30 which communicates with the opening 14 is likewise provided with a jacket and heating elements.
■ Som vist på fig. 2 og 3, og likeledes på fig. 1, er venitiilsetet 18 fastsveiset eller på annen måte tett festet til foringen 12 langs sin ytre omkrets. Den oppadvendende side 32 av ringen 18 er avfaset og skråner nedover og 'innover mot den sentrale åpning 20, slik at avskråningen gir den oppadvendende flate av ringen form av en konisk fordypning. ■ As shown in fig. 2 and 3, and likewise in fig. 1, the valve seat 18 is welded or otherwise tightly attached to the liner 12 along its outer circumference. The upward-facing side 32 of the ring 18 is chamfered and slopes downwards and inwards towards the central opening 20, so that the bevel gives the upward-facing surface of the ring the shape of a conical depression.
En ringformet kjølekanal 34 er anordnet i det indre av ringen 18. Kjølekanalen 34 har et tilførselsrør 36 for sirkulasjon av et kjølefluidum gjennom og ut av kanalen 34. En fluidumskilde (ikke vist på tegningen), f. eks. for vann, er forbundet med innløpsrøret. Mens kjølemidlet sirkuleres dannes der et skikt 40 av halvfast eller svampaktig metall som hefter fast til ringens avfasete overflate. Skiktet 40 vil i alminenligihet bestå av en legering på magnesiumbasis eller aluminiumbasis. Når apparatet eller ventilen ifølge oppfinnelsen tas i bruk er det det svampliknende skikt 40 som i realiteten danner ventilsetet. An annular cooling channel 34 is arranged in the interior of the ring 18. The cooling channel 34 has a supply pipe 36 for circulation of a cooling fluid through and out of the channel 34. A source of fluid (not shown in the drawing), e.g. for water, is connected to the inlet pipe. While the coolant is circulated, a layer 40 of semi-solid or spongy metal is formed which adheres firmly to the chamfered surface of the ring. The layer 40 will generally consist of a magnesium-based or aluminum-based alloy. When the device or valve according to the invention is put into use, it is the sponge-like layer 40 which in reality forms the valve seat.
Under bruk sirkuleres tilstrekkelig kjølemiddel gjennom kanalen 34 til å be-virke delvis stivning av en del av metallet 42 som passerer gjennom eller skal passere gjennom ventilen til sprøytestøpe-apparatet fra en kilde for smeltet metall som skal støpes, i form av et skikt 40 av sørpeliknende eller halvfast metall som hefter fast til den oppadvendende flate 32 av ringen 18. In use, sufficient coolant is circulated through the channel 34 to cause partial solidification of a portion of the metal 42 passing through or to pass through the valve of the injection molding apparatus from a source of molten metal to be cast, in the form of a layer 40 of slag-like or semi-solid metal that adheres to the upward facing surface 32 of the ring 18.
Når ventilen 22 er stengt ligger den an mot det svampaktige, halvfaste skikt 40 og danner fullstendig tetning selv om ventilen 22 eller den oppadvendende flate eller ventilsete 32 av ringen 18 kan ha uregel-messigheter på overflaten slik at de to deler ikke passer nøyaktig til hverandre. When the valve 22 is closed, it rests against the spongy, semi-solid layer 40 and forms a complete seal even though the valve 22 or the upturned face or valve seat 32 of the ring 18 may have irregularities on the surface so that the two parts do not fit exactly together .
Graden av kjøling av ventilsete som trenges for å frembringe det halvfaste skikt 40 varierer med typen av det smel-tete metall som skal passere gjennom ventilen. Som eksempel skal nievnes at i et praktisk tilfelle hvor det ble arbeidet med en alumlniumlegering bestående av 9y2 deler silisium, 4 deler kopper og resten aluminium (total mengde 100 deler) og med en støpetemperatur på omkring 649° C (denne og de nedenfor angitte grader er omregnet fra Fahrenheit) ble temperaturen av overflaten 32 holdt innenfor temperaturområdet 371° C til 593° C og fortrinnsvis innenfor området 493° C til 510° C. The degree of cooling of the valve seat required to produce the semi-solid layer 40 varies with the type of molten metal to pass through the valve. As an example, it should be mentioned that in a practical case where work was carried out with an aluminum alloy consisting of 9y2 parts silicon, 4 parts copper and the rest aluminum (total quantity 100 parts) and with a casting temperature of around 649° C (this and the degrees indicated below is converted from Fahrenheit) the temperature of the surface 32 was maintained within the temperature range of 371° C to 593° C and preferably within the range of 493° C to 510° C.
Ved støpning med en legering bestående av 9 deler aluminium, 1 del sink og resten magnesium (i alt 100 deler) med en støpetemperatur på omkring 649° C, ble temperaturen av overflaten 32 holdt innenfor et område fra 316° C til 593° C og fortrinnsvis mellom 439° C og 454° C. Andre legeringer vil selvfølgelig kreve at den oppaidvendende flate 32 holdes på temperaturer innenfor an'dre temperaturområdet for å frembringe et halvfast eller sørpeliknende skikt av metall hvil-ket lett ikan bestemmes ved enkle forsøk. When casting with an alloy consisting of 9 parts aluminum, 1 part zinc and the rest magnesium (total 100 parts) with a casting temperature of about 649° C., the temperature of the surface 32 was maintained within a range from 316° C. to 593° C. and preferably between 439° C and 454° C. Other alloys will of course require that the facing surface 32 be kept at temperatures within the other temperature range in order to produce a semi-solid or slurry-like layer of metal which is easily determined by simple experiments.
Ventilen og ventilsetet fremstilles fortrinnsvis av materialer som er motstands-dyktige mot erosjon og korrosjon, f. eks. silisiumkarbid eller metallborider eller me-tallkarbider. The valve and the valve seat are preferably made of materials that are resistant to erosion and corrosion, e.g. silicon carbide or metal borides or metal carbides.
Mens ventilen i det foranstående er beskrevet anvendt for aluminium--og mag-nesiumOegeringer kan ventilen også brukes ved støpning med sink. While the valve is described above as being used for aluminum and magnesium alloys, the valve can also be used when casting with zinc.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO1916/72A NO137678C (en) | 1970-12-23 | 1972-05-30 | DESIGN OF DEPOT DRAGONS WITH A CORE CONTAINING ACTIVE SUBSTANCE AND COATED WITH A COAT |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702063409 DE2063409C3 (en) | 1970-12-23 | Depot dragees with exponential release of active ingredients | |
| NO1916/72A NO137678C (en) | 1970-12-23 | 1972-05-30 | DESIGN OF DEPOT DRAGONS WITH A CORE CONTAINING ACTIVE SUBSTANCE AND COATED WITH A COAT |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO137678B true NO137678B (en) | 1977-12-27 |
| NO137678C NO137678C (en) | 1978-04-05 |
Family
ID=5791958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO1916/72A NO137678C (en) | 1970-12-23 | 1972-05-30 | DESIGN OF DEPOT DRAGONS WITH A CORE CONTAINING ACTIVE SUBSTANCE AND COATED WITH A COAT |
Country Status (14)
| Country | Link |
|---|---|
| AT (1) | AT310357B (en) |
| AU (1) | AU468168B2 (en) |
| BE (1) | BE777165A (en) |
| BR (1) | BR7204070D0 (en) |
| CH (1) | CH569482A5 (en) |
| DK (1) | DK130388B (en) |
| ES (1) | ES208802Y (en) |
| FI (1) | FI53659C (en) |
| FR (1) | FR2119702A5 (en) |
| GB (1) | GB1372040A (en) |
| IT (1) | IT954176B (en) |
| NL (1) | NL175029C (en) |
| NO (1) | NO137678C (en) |
| ZA (1) | ZA723984B (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4218433A (en) * | 1977-03-03 | 1980-08-19 | Nippon Kayaku Kabushiki Kaisha | Constant-rate eluting tablet and method of producing same |
| JPS603286B2 (en) * | 1977-03-03 | 1985-01-26 | 日本化薬株式会社 | Constant-dissolution formulation |
| GB2049469B (en) * | 1979-05-10 | 1983-02-16 | Alza Corp | Process for making an osmotically driven active agent dispenser |
| IE54171B1 (en) * | 1982-06-22 | 1989-07-05 | Univ Glasgow | Device for introducing nutrients and/or therapeutic materials into ruminant animals |
| US4503031A (en) * | 1982-12-17 | 1985-03-05 | Glassman Jacob A | Super-fast-starting-sustained release tablet |
| US4503030A (en) * | 1983-06-06 | 1985-03-05 | Alza Corporation | Device for delivering drug to certain pH environments |
| US4663147A (en) * | 1985-09-03 | 1987-05-05 | International Minerals & Chemical Corp. | Disc-like sustained release formulation |
| US4717567A (en) * | 1985-11-25 | 1988-01-05 | Eastman Kodak Company | Rumen-stable pellets |
| US4816262A (en) * | 1986-08-28 | 1989-03-28 | Universite De Montreal | Controlled release tablet |
| US4792448A (en) * | 1987-06-11 | 1988-12-20 | Pfizer Inc. | Generic zero order controlled drug delivery system |
| US4814181A (en) * | 1987-09-03 | 1989-03-21 | Alza Corporation | Dosage form comprising fast agent delivery followed by slow agent delivery |
| GB8820353D0 (en) * | 1988-08-26 | 1988-09-28 | Staniforth J N | Controlled release tablet |
| US5045082A (en) * | 1990-01-10 | 1991-09-03 | Alza Corporation | Long-term delivery device including loading dose |
| US5256440A (en) * | 1992-06-22 | 1993-10-26 | Merck & Co., Inc. | Process for producing a tablet core aperture |
| US7122143B2 (en) | 2001-09-28 | 2006-10-17 | Mcneil-Ppc, Inc. | Methods for manufacturing dosage forms |
| US7838026B2 (en) | 2001-09-28 | 2010-11-23 | Mcneil-Ppc, Inc. | Burst-release polymer composition and dosage forms comprising the same |
| US6837696B2 (en) | 2001-09-28 | 2005-01-04 | Mcneil-Ppc, Inc. | Apparatus for manufacturing dosage forms |
| ATE376826T1 (en) * | 2001-09-28 | 2007-11-15 | Mcneil Ppc Inc | MODIFIED RELEASE PHARMACEUTICAL FORMS |
| US7807197B2 (en) | 2002-09-28 | 2010-10-05 | Mcneil-Ppc, Inc. | Composite dosage forms having an inlaid portion |
| WO2009023006A2 (en) * | 2006-05-08 | 2009-02-19 | Mcneil-Ppc, Inc. | Modified release dosage form |
| US8673352B2 (en) | 2005-04-15 | 2014-03-18 | Mcneil-Ppc, Inc. | Modified release dosage form |
-
1971
- 1971-12-20 NL NLAANVRAGE7117446,A patent/NL175029C/en not_active IP Right Cessation
- 1971-12-20 CH CH1859371A patent/CH569482A5/xx not_active IP Right Cessation
- 1971-12-22 GB GB5972771A patent/GB1372040A/en not_active Expired
- 1971-12-22 BE BE777165A patent/BE777165A/en not_active IP Right Cessation
- 1971-12-22 ES ES1971208802U patent/ES208802Y/en not_active Expired
- 1971-12-22 AU AU37198/71A patent/AU468168B2/en not_active Expired
- 1971-12-22 DK DK629371AA patent/DK130388B/en unknown
- 1971-12-22 IT IT54943/71A patent/IT954176B/en active
- 1971-12-23 AT AT1108371A patent/AT310357B/en not_active IP Right Cessation
- 1971-12-23 FR FR7146437A patent/FR2119702A5/fr not_active Expired
-
1972
- 1972-05-30 NO NO1916/72A patent/NO137678C/en unknown
- 1972-06-12 ZA ZA723984A patent/ZA723984B/en unknown
- 1972-06-22 FI FI1790/72A patent/FI53659C/en active
- 1972-06-22 BR BR4070/72A patent/BR7204070D0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ES208802Y (en) | 1976-07-16 |
| GB1372040A (en) | 1974-10-30 |
| DE2063409B2 (en) | 1975-07-10 |
| DK130388B (en) | 1975-02-17 |
| FI53659C (en) | 1978-07-10 |
| FI53659B (en) | 1978-03-31 |
| NL7117446A (en) | 1972-06-27 |
| DK130388C (en) | 1975-07-14 |
| DE2063409A1 (en) | 1972-07-20 |
| ZA723984B (en) | 1974-02-27 |
| IT954176B (en) | 1973-08-30 |
| CH569482A5 (en) | 1975-11-28 |
| NL175029B (en) | 1984-04-16 |
| NO137678C (en) | 1978-04-05 |
| ES208802U (en) | 1976-04-01 |
| AT310357B (en) | 1973-09-25 |
| AU468168B2 (en) | 1976-01-08 |
| AU3719871A (en) | 1973-06-28 |
| NL175029C (en) | 1984-09-17 |
| BE777165A (en) | 1972-06-22 |
| FR2119702A5 (en) | 1972-08-04 |
| BR7204070D0 (en) | 1974-06-27 |
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