JPS6049004B2 - Equipment for separating liquid from slurry-containing fluids - Google Patents
Equipment for separating liquid from slurry-containing fluidsInfo
- Publication number
- JPS6049004B2 JPS6049004B2 JP52138993A JP13899377A JPS6049004B2 JP S6049004 B2 JPS6049004 B2 JP S6049004B2 JP 52138993 A JP52138993 A JP 52138993A JP 13899377 A JP13899377 A JP 13899377A JP S6049004 B2 JPS6049004 B2 JP S6049004B2
- Authority
- JP
- Japan
- Prior art keywords
- drum
- flange member
- flange
- helical
- height
- 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
- 239000002002 slurry Substances 0.000 title claims description 12
- 239000012530 fluid Substances 0.000 title claims description 8
- 239000007788 liquid Substances 0.000 title claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/11—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
- B01D33/72—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
- B01D33/722—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding containing fixed liquid displacement elements or cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/80—Accessories
- B01D33/801—Driving means, shaft packing systems or the like
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filtration Of Liquid (AREA)
- Treatment Of Sludge (AREA)
- Centrifugal Separators (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Description
【発明の詳細な説明】
本発明は、スラリーを含有する流体から液体を分離する
装置に関するもので、該装置は多孔円筒マントル壁を有
する回転自在の長方形ドラムを備え、その内部には、ド
ラムの回転運動に従つてスラリーを送る作用をなす螺旋
状フランジ部材を配Ｊ設し、前記螺旋状フランジ部材の
フランジをドラムのマントル壁の内側からその中心に向
つて延伸させてある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for separating liquids from fluids containing slurries, the apparatus comprising a rotatable rectangular drum having a perforated cylindrical mantle wall, the interior of which includes a A helical flange member is provided which serves to direct the slurry in accordance with the rotational movement, the flange of the helical flange member extending from the inside of the mantle wall of the drum toward the center thereof.
本発明の目的は、供給されたスラリーの量が脱水装置の
容量を超えた場合に、ドラムの吐出し端丁部から送り出
される正常に脱水された残留物と共に余水が運び出され
るのを防止することのできるスラリーを含有する流体か
ら液体を分離する装置を提供することにある。It is an object of the present invention to prevent excess water from being carried away with the normally dewatered residue being delivered from the discharge end of the drum if the amount of slurry supplied exceeds the capacity of the dewatering device. An object of the present invention is to provide an apparatus for separating a liquid from a fluid containing a slurry.
この目的は、ドラムの吐出し端部が、ドラムの取入れ端
部よりも高くなるようにドラムを傾斜させて装置し、螺
旋状フランジ部材には送り方向中にフランジの高さの減
少部分を備え、同時に、ドラムの取入れ端部に中央余水
吐き口を備えた本発明の装置によつて達成できる。The purpose is to install the drum at an angle so that the discharge end of the drum is higher than the intake end of the drum, and the helical flange member is provided with a portion of decreasing flange height in the feed direction. , which at the same time can be achieved by the device of the invention with a central spillway at the inlet end of the drum.
以下、本発明の一実施例を添付図面について詳しく説明
する。Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.
図示の脱水装置は、全体を符号１で示した脱水ドラムを
備え、該脱水ドラム１は一端が端壁３で部分的に閉鎖さ
れている多孔円筒マントル壁２から構成されている。The illustrated dewatering device comprises a dewatering drum, generally designated 1, consisting of a perforated cylindrical mantle wall 2 partially closed at one end by an end wall 3.
この脱水ドラム１の反対端部には円錐台形の端壁４がマ
ントル壁２に連結してあり、この端壁４は円錐の狭い部
分で吐出し口を形成している。送りの方向から見て後方
へ向いているバイブソケット５が端壁３に連結していて
、脱水ドラム１のマントル２に対し同軸的に配置されて
いる。供給管６がわずかに偏心配置に、すなわちやや上
方へずれて脱水ドラム１の内部へ突き出ており、図示の
実施例においては前記供給管６はわずかに面取りされた
端部６ａを形成している。その上、この取入れ管にはそ
の端部に放水口６ｂがあるが、これは破線で示されてお
り、かつ図示の実施例では三角形状にしてある。供給さ
れたスラリーはこの放水口から７で示す矢印の方向に、
すなわちドラム１のマントル壁２に向つて側方へ流出す
る。この脱水ドラム１はそれぞれ多数．のローラ８およ
び９によつて支持されているが、好ましくはドラム１の
各端部を対向配置の一組のローラで支持するのがよい。
更に、これらのローラは垂直方向に調整自在にしておい
て、ドラム１のマントル壁２の傾斜角を調整自在に配設
できる．ようにしてある。脱水すべきスラリーを供給す
るための送り装置をドラムの内側に取付けてあり、この
送り装置は螺旋状フランジ部材１０から成り、マントル
壁２の内側からドラムの中心に向つて半径方向に延びて
いる。第１図から明らかなよりうに、螺旋状フランジ部
材１０は、送りの方向から見てフランジの高さを減小さ
せてある。図示の実施例では、フランジの高さはａで最
も大きくなつているが、ｂの部分のフランジの高さはや
や小さくなつており、ｃの部分のフランジの高さが最も
小さくなつている。螺旋状フランジ部材１０はｄの部分
で終つているが、図示の実施例では、この部分ｄはａの
部分のフランジの高さとほぼ同じ高さにしてある。図示
の実施例に示したように、フランジの高さが段々に減小
する代りに、フランジの高さを取入れ端部から螺旋部分
ａの方向へテーパをつけて減少させることも、この発明
の基本理念の範囲内であることは論を俟たない。更に第
フ１図から明らかてあるが、螺旋部分ｂおよびｃはフラ
ンジの高さが高い部分Ａ，ｄより小さなピッチを備えて
いるが、このことは、ドラムの設置角度が傾斜している
にもかかわらずドラムのマントル壁の全表面をよりよく
満たし、好適に利用することができるようにしてある。
液体は通常ドラム１のマントル壁２を通してスラリーか
ら分離させられて、脱水ドラム１の下方に設けられた集
水槽１２中に矢印１１の方向に沿つて流下し、そこから
放出バイブ１３を介して排出される。取入れ側の端壁３
は円周方向に延伸していて且つ駆動歯車１５にかみ合つ
ている駆動歯車輪１４を支持しており、駆動歯車１５は
駆動原動機１６の出力軸歯車に連結している。駆動原動
機１６は矢印１７によつて示してあるように、脱水ドラ
ム１を第２図による反時計廻り方向に駆動する。また、
比較的硬い針毛を備えており且つ矢印１８の方向に回転
するブラシ１９をドラムのマントル壁２に圧接させてあ
る。ブラシ１９は、マントルに圧接することによりマン
トルによつて駆動されるので、ブラシの針毛がドラムの
マントル壁の孔の中に突きささつて、マントル壁を不純
物から効果的に清掃する。しかしながら、それにもかか
わらずドラムの孔がつまるようなことがあつて、ドラム
の内部の流体量を増大させることがあれば、反対側のド
ラムの吐出し口の底縁よりも低い位置にあるバイブソケ
ット５により形成されている余水吐き口を越えて、第１
図の矢印２０の方向に余水が流出する。余水は集水槽２
１の中へ流下し、そこから更に排水バイブ２２を介して
選ばれる。この流体は、たとえぱ供給管６を介して脱水
装置へ戻すことができる。送り装置の螺旋状フランジ部
材１０のフランジの高さが次第に減少しているので、実
際上螺旋状フランジ部材１０の全長に沿つて効果的な余
水の分離が生じる。斯くして、非脱水材がドラムから送
り出され且つ吐出しシュート２３を介して脱水済み材が
集められている地点へ運ばれるおそれは全くない。それ
のみならず、図示の装置は、通常の作動状態下、すなわ
ち装置内に余水が導入されていない状態では、非常に良
好な脱水効果を有していて、この装置から出る材料は非
常に乾いている。この発明は上述しかつ図示した実施例
によつて限定されるものてはない。At the opposite end of the dewatering drum 1, a truncated conical end wall 4 is connected to the mantle wall 2, and this end wall 4 forms a discharge opening in the narrow part of the cone. A vibrator socket 5 facing rearward in the direction of feed is connected to the end wall 3 and is arranged coaxially with respect to the mantle 2 of the dewatering drum 1. The supply pipe 6 projects into the interior of the dewatering drum 1 in a slightly eccentric arrangement, ie with a slight upward shift, in the illustrated embodiment said supply pipe 6 forming a slightly beveled end 6a. . Furthermore, this intake pipe has a water outlet 6b at its end, which is shown in broken lines and is triangular in the illustrated embodiment. The supplied slurry flows from this water outlet in the direction of the arrow shown at 7.
That is, it flows laterally towards the mantle wall 2 of the drum 1. Each of these dehydration drums 1 has a large number. It is preferred that each end of the drum 1 be supported by a pair of opposed rollers.
Further, these rollers can be vertically adjusted so that the inclination angle of the mantle wall 2 of the drum 1 can be adjusted. It's like this. A feeding device for supplying the slurry to be dewatered is mounted inside the drum and consists of a helical flange member 10 extending radially from the inside of the mantle wall 2 towards the center of the drum. . As can be seen in FIG. 1, the helical flange member 10 has a reduced flange height when viewed in the direction of feed. In the illustrated embodiment, the height of the flange is greatest at point a, the height of the flange at point b is slightly smaller, and the height of the flange at point c is the smallest. The helical flange member 10 terminates in section d, which in the illustrated embodiment is approximately the same height as the flange height of section a. Instead of the height of the flange being gradually reduced as shown in the illustrated embodiment, it is also a feature of the invention that the height of the flange is tapered from the receiving end in the direction of the helical portion a. There is no question that it is within the scope of the basic philosophy. Furthermore, it is clear from FIG. 1 that the helical portions b and c have a smaller pitch than the higher flange portions A and d, which is due to the inclined installation angle of the drum. Nevertheless, the entire surface of the mantle wall of the drum is better filled and can be utilized to advantage.
The liquid is normally separated from the slurry through the mantle wall 2 of the drum 1 and flows down along the direction of the arrow 11 into a collection tank 12 provided below the dewatering drum 1, from where it is discharged via a discharge vibrator 13. be done. Inlet side end wall 3
supports a drive gear wheel 14 extending circumferentially and meshing with a drive gear 15 , which is connected to an output shaft gear of a drive motor 16 . The drive motor 16 drives the dewatering drum 1 in the counterclockwise direction according to FIG. 2, as indicated by the arrow 17. Also,
A brush 19 having relatively hard bristles and rotating in the direction of arrow 18 is pressed against the mantle wall 2 of the drum. The brush 19 is driven by the mantle by pressing against it, so that the bristles of the brush penetrate into the holes in the mantle wall of the drum, effectively cleaning the mantle wall from impurities. However, if the holes in the drum become clogged and the amount of fluid inside the drum increases, the vibrator should be placed lower than the bottom edge of the outlet of the opposite drum. Beyond the spillway formed by the socket 5, the first
Surplus water flows out in the direction of arrow 20 in the figure. Surplus water is collected in water collection tank 2
1, and from there it is further selected via a drainage vibrator 22. This fluid can for example be returned to the dewatering device via the supply pipe 6. Since the flange height of the helical flange member 10 of the feeder is gradually reduced, effective extra water separation occurs virtually along the entire length of the helical flange member 10. There is thus no risk of non-dewatered material being discharged from the drum and conveyed via the discharge chute 23 to the point where dewatered material is collected. Not only that, the device shown has a very good dewatering effect under normal operating conditions, i.e. when no surplus water is introduced into the device, and the material coming out of the device is very It's dry. The invention is not limited to the embodiments described and illustrated above.
例えば、余水吐き出しに関し、この装置内に導入される
スラリーの量を規制できる感知装置を設けることもてき
る。For example, with respect to spillovers, a sensing device may be provided which can regulate the amount of slurry introduced into the device.
図は本発明のスラリーを含有する流体から液体を分離す
る装置の実施例を示したもので、第１図はその縦断面図
、第２図は第１図の左側から見た一部を断面て示す側面
図である。
なお、図において、１・・・・・・脱水ドラム、２・・
・マントル壁、４・・・・・端壁、５・・・・・・バイ
ブソケット、１０・・・・・・螺旋状フランジ部材。The figures show an embodiment of the device for separating a liquid from a fluid containing slurry according to the present invention. FIG. In addition, in the figure, 1... dehydration drum, 2...
- Mantle wall, 4... End wall, 5... Vibe socket, 10... Spiral flange member.
Claims (1)
備え、該ドラムの内側にはドラムの回転運動によつてス
ラリーを送出す作用をなす螺旋状フランジ部材を配設し
、該螺旋状フランジ部材のフランジをドラムのマントル
壁の内壁からその中心に向う方向に延伸させ、ドラムの
吐出し端部がドラムの取入れ端部よりも高くなるように
ドラムを傾斜させて装置し、螺旋状フランジ部材には送
り方向に沿つてそのフランジの高さを減少させた部分を
備え、ドラムの取入れ端部に中央余水吐き口を設けたこ
とを特徴とするスラリー含有流体から液体を分離する装
置。 ２ 螺旋状フランジ部材にはドラムの吐出し端部の近く
で再びフランジの高さを増大させた部分を備えたことを
特徴とする前記特許請求の範囲第１項記載の装置。 ３ 螺旋状フランジ部材のフランジの高さを連続的に次
第に減少させたことを特徴とする前記特許請求の範囲第
１項又は第２項に記載の装置。 ４ 螺旋状フランジ部材の中央部分を、該螺旋状フラン
ジ部材の他の両端部分より、その螺旋のピッチを小さく
させ且つそのフランジの高さを減少させたことを特徴と
する前記特許請求の範囲各項に記載の装置。 ５ ドラムのマントル壁にはその吐出し端部で吐出し口
に向つて円錐形のテーパーを付けた端部を備えたことを
特徴とする前記特許請求の範囲各項に記載の装置。 ６ 余水吐き口を後方に向つて開口させ且つドラムと同
軸に配設したパイプソケットによつて形成させたことを
特徴とする前記特許請求の範囲いずれか１項に記載の装
置。 ７ 余水吐き口から液体が流出する際に流体の供給を調
整する作用をなす余水の吐き出しに関する感知装置を余
水吐き口に設けたことを特徴とする前記特許請求の範囲
のいずれか１項に記載の装置。[Scope of Claims] 1. A rotatable rectangular drum having a porous mantle wall, a helical flange member disposed inside the drum for delivering slurry by the rotational movement of the drum, The flange of the helical flange member extends from the inner wall of the mantle wall of the drum in a direction toward its center, and the drum is inclined such that the discharge end of the drum is higher than the intake end of the drum, and the spiral separating the liquid from the slurry-containing fluid, characterized in that the shaped flange member has a reduced height of the flange along the feed direction and is provided with a central spillway at the inlet end of the drum; Device. 2. Apparatus according to claim 1, characterized in that the helical flange member is provided with a portion in which the height of the flange is increased again near the discharge end of the drum. 3. A device according to claim 1 or 2, characterized in that the height of the flange of the helical flange member is continuously and gradually reduced. 4. Each of the above claims, characterized in that the central portion of the helical flange member has a smaller helical pitch and a lower flange height than the other end portions of the helical flange member. Equipment described in Section. 5. An apparatus as claimed in any one of the preceding claims, characterized in that the mantle wall of the drum is provided at its discharge end with a conically tapered end towards the discharge opening. 6. The device according to any one of the preceding claims, characterized in that the spillway opening is formed by a pipe socket that opens rearward and is disposed coaxially with the drum. 7. Any one of the preceding claims, characterized in that the spillway is provided with a sensing device for the discharge of spillwater that functions to adjust the supply of fluid when the liquid flows out from the spillway. Equipment described in Section.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7613012-9 | 1976-11-22 | ||
| SE7613012A SE402716B (en) | 1976-11-22 | 1976-11-22 | LIQUID SEPARATOR INCLUDING PERFORATED DRUM SCREW |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5387063A JPS5387063A (en) | 1978-08-01 |
| JPS6049004B2 true JPS6049004B2 (en) | 1985-10-30 |
Family
ID=20329511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52138993A Expired JPS6049004B2 (en) | 1976-11-22 | 1977-11-21 | Equipment for separating liquid from slurry-containing fluids |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS6049004B2 (en) |
| AT (1) | AT352651B (en) |
| BR (1) | BR7707729A (en) |
| CA (1) | CA1110979A (en) |
| CH (1) | CH620593A5 (en) |
| DE (1) | DE2751091C2 (en) |
| DK (1) | DK147097C (en) |
| FI (1) | FI63525C (en) |
| GB (1) | GB1596414A (en) |
| NL (1) | NL7712485A (en) |
| NO (1) | NO143255C (en) |
| SE (1) | SE402716B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE434125B (en) * | 1982-01-18 | 1984-07-09 | Roto Sieve Ab | DEVICE FOR SUPPLYING A SLIDE OR PARTICULAR LIQUID FLUID TO A ROTABLE LIQUID DRUM |
| US4507202A (en) * | 1982-01-18 | 1985-03-26 | Dan Nord | Device for the separation of a liquid |
| JPS58132514U (en) * | 1982-02-27 | 1983-09-07 | 東急車輌製造株式会社 | “Filtration” device in sludge water treatment vehicle |
| SE434801B (en) * | 1982-07-12 | 1984-08-20 | Roto Sieve Ab | DEVICE FOR SEPARATION OF LIQUID WATER A SLUSH AND INCLUDING A ROTATE DRAWAGE DRUM WITH WIDTH |
| JPS59501252A (en) * | 1982-07-12 | 1984-07-19 | ロ−ト−シ−ブ アクチエボラ−ク | Liquid separation device from slurry with water discharge part |
| JPS59166810U (en) * | 1983-04-19 | 1984-11-08 | 株式会社 西原環境衛生研究所 | filtration device |
| JPS61209296A (en) * | 1985-03-14 | 1986-09-17 | Kawasaki Heavy Ind Ltd | Apparatus for separating foreign material in slurry having high viscosity |
| US4804439A (en) * | 1988-02-11 | 1989-02-14 | Beloit Corporation | Means and method for removal of strings from waste paper |
| DE9209906U1 (en) * | 1992-07-23 | 1993-11-25 | Schmidt, Peter, 22145 Hamburg | Device for separating liquid mixtures |
| GB2277044A (en) * | 1993-04-16 | 1994-10-19 | Qed Int Ltd | Removal of metal particles from drilling mud |
| DE19832105A1 (en) * | 1998-07-17 | 2000-01-27 | Pill Gertrud | Separator for use in the manufacture of printed circuit boards |
| DE10012653A1 (en) * | 2000-03-15 | 2001-10-04 | Georg Schimf | Oil and petrol separator, comprises an additional cleansing unit which continuously cleans oil, petrol and sludge from the main separator unit. |
| GB2501122A (en) * | 2012-04-13 | 2013-10-16 | Siemens Vai Metals Tech Gmbh | Slurry dewatering and filtering device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT247368B (en) * | 1963-02-18 | 1966-06-10 | Siegener Ag Eisenkonstruktion | Drainage device |
| DE6604382U (en) * | 1965-08-20 | 1970-01-15 | Passavant Werke | THICKENER FOR SOLIDS CONTAINING LIQUIDS |
| SE346068B (en) * | 1969-04-24 | 1972-06-26 | Ingenioers Fa Vvs Utrustning A | |
| US3865727A (en) * | 1973-03-14 | 1975-02-11 | Fmc Corp | Pumping apparatus with separating mechanism |
-
1976
- 1976-11-22 SE SE7613012A patent/SE402716B/en not_active IP Right Cessation
-
1977
- 1977-11-14 NL NL7712485A patent/NL7712485A/en not_active Application Discontinuation
- 1977-11-16 FI FI773455A patent/FI63525C/en not_active IP Right Cessation
- 1977-11-16 DE DE2751091A patent/DE2751091C2/en not_active Expired
- 1977-11-18 AT AT826177A patent/AT352651B/en not_active IP Right Cessation
- 1977-11-18 CH CH1422177A patent/CH620593A5/en not_active IP Right Cessation
- 1977-11-18 DK DK511477A patent/DK147097C/en active
- 1977-11-21 BR BR7707729A patent/BR7707729A/en unknown
- 1977-11-21 JP JP52138993A patent/JPS6049004B2/en not_active Expired
- 1977-11-21 CA CA291,376A patent/CA1110979A/en not_active Expired
- 1977-11-21 NO NO773974A patent/NO143255C/en unknown
- 1977-11-22 GB GB48655/77A patent/GB1596414A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NO773974L (en) | 1978-05-23 |
| JPS5387063A (en) | 1978-08-01 |
| DE2751091C2 (en) | 1986-07-03 |
| FI63525C (en) | 1983-07-11 |
| BR7707729A (en) | 1978-08-01 |
| DK511477A (en) | 1978-05-23 |
| GB1596414A (en) | 1981-08-26 |
| NO143255C (en) | 1981-01-07 |
| FI773455A (en) | 1978-05-23 |
| DK147097B (en) | 1984-04-09 |
| NL7712485A (en) | 1978-05-24 |
| DE2751091A1 (en) | 1978-05-24 |
| ATA826177A (en) | 1979-03-15 |
| NO143255B (en) | 1980-09-29 |
| CA1110979A (en) | 1981-10-20 |
| AT352651B (en) | 1979-10-10 |
| SE402716B (en) | 1978-07-17 |
| FI63525B (en) | 1983-03-31 |
| DK147097C (en) | 1984-09-17 |
| CH620593A5 (en) | 1980-12-15 |
| SE7613012L (en) | 1978-05-23 |
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