JPS5834291B2 - カトウカンノウケグチブケイセイホウホウ - Google Patents

カトウカンノウケグチブケイセイホウホウ

Info

Publication number
JPS5834291B2
JPS5834291B2 JP50057747A JP5774775A JPS5834291B2 JP S5834291 B2 JPS5834291 B2 JP S5834291B2 JP 50057747 A JP50057747 A JP 50057747A JP 5774775 A JP5774775 A JP 5774775A JP S5834291 B2 JPS5834291 B2 JP S5834291B2
Authority
JP
Japan
Prior art keywords
socket
tube
outer periphery
synthetic resin
packing
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
Application number
JP50057747A
Other languages
English (en)
Other versions
JPS51132283A (en
Inventor
弘 草野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Original Assignee
Kubota Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kubota Corp filed Critical Kubota Corp
Priority to JP50057747A priority Critical patent/JPS5834291B2/ja
Priority to GB16854/76A priority patent/GB1523073A/en
Priority to NLAANVRAGE7604713,A priority patent/NL170604C/xx
Priority to SE7605294A priority patent/SE421185B/xx
Priority to DE2620639A priority patent/DE2620639C3/de
Priority to US05/685,152 priority patent/US4124422A/en
Priority to FR7614336A priority patent/FR2310853A1/fr
Publication of JPS51132283A publication Critical patent/JPS51132283A/ja
Publication of JPS5834291B2 publication Critical patent/JPS5834291B2/ja
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/565—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits involving interference fits, e.g. force-fits or press-fits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52296—Joining tubular articles involving the use of a socket said socket comprising sealing elements, e.g. gaskets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52298—Joining tubular articles involving the use of a socket said socket being composed by several elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7394—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/24—Pipe joints or couplings
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/4987—Elastic joining of parts
    • Y10T29/49872—Confining elastic part in socket

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Description

【発明の詳細な説明】 本発明は、合成樹脂管の受口部の形成方法に関するもの
である。
例えば樹脂を含浸したグラスファイバーを巻回して形成
される合成樹脂管は、直管状に形成されるのが普通であ
り、受口部を同時に形成するには種々の困難がある。
そこで予じめ直管状に形成された管体一端部に、ソケッ
トをその一端部を外嵌重合させた状態で形成して受口部
を形成する場合が多いが、この様に管体とソケットを別
々に形成するとその接合面での接着力に問題が生じ、こ
の部分で剥離する惧れがあった。
本発明はかかる欠点を解消すべく合成樹脂管において管
体とソケットとの接合力の強い受口部を形成することの
できる方法を提案するものであって、以下その一実施態
様を図面に基づいて説明する。
まぜ、本発明方法を適用すべき合成樹脂管の受口部の構
成を第１図により説明する。
この受口部１は、管体２の端部２ａにソケット３の一端
部３ａを外嵌重合させると共に、この管体２とソケット
３の重合部にゴムパツキンなどの弾性体４を介在させた
ものである。
かかる構成の受口部１によれば、施設時に管体２が土圧
により変形しても、前記弾性体４が介在させているため
この弾性体が変形して管体２とソケット３との接合部に
作用する剥離応力を吸収することができるのである。
かかる受口部１を形成するには、まず管体２の端部２ａ
にゴムパツキン４を嵌合接着した後、樹脂を含浸させた
グラスファイバーを外周に巻回してソケット３を形成す
るが、その際直管状の管体２とゴムパツキン４との間の
接合力が最も弱くこの部分に剥離が生ずる惧れがある。
本発明方法はゴムパツキン４を嵌着すべき管体端部２ａ
外周を締付けて縮径させた後ゴムパツキン４を嵌着し、
ソケット３を形成し、ソケット形成後締付けを解除する
ことにより管体端部の拡径付勢力によって強い接合力を
得ることを特徴とするものであり、以下第２図により詳
細に説明する。
管体２の端部２ａの近傍外周を、均等加圧するためのゴ
ム輪５を介して締付は治具６により締付けて管径の１／
１０００〜１／３０００程度縮径させると共に、この端
部外周に接着剤を塗布する。
管体２がグラスファイバーとポリエステル樹脂とから成
るＦＷ管の場合には、管外面が接着困難な表面性状とな
っているので、外面をグラインダー等で研磨しておくの
が望ましく、その上にエポキシ系などの熱硬化性樹脂の
接着剤を塗布する。
次に管体端部２ａにゴムパツキン４を外嵌してこのゴム
パツキン４を接着するが、このゴムパツキン４はその内
径が管体２の外径よりも１０％程度小さいものを用いて
引張りざみに接着すれば、接着剤とゴムパツキン４の引
張力により水密性が向上する。
また、ゴムパツキン４の接着性を良くするために、その
内外周面に塩酸処理を施すか、接着性の良いゴムを張り
付けても良い。
この様にして端部２ａの外周にゴムパツキン４を嵌着し
た後、該管体端面２ｂにソケット形成用芯金７を当接せ
しめ、これらゴムパツキン４及び芯金７外周面に樹脂を
含浸させたグラスファイバーを巻付けることにより所定
の厚みのソケット３を形成する。
勿論熱硬化性樹脂及び接着剤を用いる場合には芯金７は
適宜手段で加熱される。
ソケット３が硬化すれば芯金７を引抜き、治具６による
締め付けを緩めて取外すことにより受口部１の形成が完
了する。
この様に管体端部２ａ外周を締付けて弾性的に縮径させ
た状態でソケット３を形成して、管体端部２ａの弾性復
元力による拡径付勢力で、ソケット３に圧嵌させる方法
によると、熱収縮性材料から成るソケット３を用いる場
合に比べても互いに圧嵌し合う力を非常に大きくするこ
とができ、苛酷な負荷条件下でも管体２とゴムパツキン
４又はソケット３との間に強い接合力が得られ、剥離を
生ずる惧れかない。
以上の実施例の説明から明らかな様に、本発明方法によ
れば受口部を形成すべき管体端部近傍外周を締付けて縮
径させると共に前記管体の端部外周にパツキンを嵌着し
、該管体の端面にソケット形成用芯金を当接せしめ、そ
の後に前記パツキン及び芯金の外周面上に樹脂含浸グラ
スファイバーを巻付けて所定厚さの合成樹脂ソケットを
形成するので、ソケットの硬化後前記芯金を引抜き、管
体の端部近傍外周の締付けを解除すると、管体端部がそ
の拡径付勢によってソケットに圧嵌された状態で、かつ
管体が土圧により変形してもパツキンの変形により管体
とソケットとの接合部に作用する別離応力を吸収できる
状態で管体端部とソケットとが強固に接合される。
従って簡単に接合面における接合力の極めて大きな受口
部を得ることができ、従来の様に接合面で剥離を生ずる
惧れがなくなる′。
【図面の簡単な説明】
図面は本発明方法の一実施例を示し第１図は形成すべき
受口部の構造を示す縦断面図、第２図は本発明方法の実
施状態を示す縦断面図である。 １・・・・・・受口部、２・・・・・・管体、２ａ・・
・・・・管体端部、３・・・・・・ソケット、４・・・
・・・ゴムパツキン、５・・・・・・ゴム輪、６・・・
・・・締付は治具、７・・・・・・芯金。

Claims (1)

    【特許請求の範囲】
  1. １ 受口部を形成すべき合成樹脂管体の端部近傍外周を
    締付けて弾性的に縮径させると共に前記管体の端部外周
    にパツキンを嵌着し、該管体の端面にソケット形成用芯
    金を尚接せしめ、その後に前記パツキン及び芯金の外周
    面上に樹脂含浸グラスファイバーを巻付けて所定厚さの
    合成樹脂ソケットを形成し、該ソケットの硬化後前記芯
    金を引抜き、管体の端部近傍外周の締付けを解除するこ
    とを特徴とする合成樹脂管の受口部形成方法。
JP50057747A 1975-05-13 1975-05-13 カトウカンノウケグチブケイセイホウホウ Expired JPS5834291B2 (ja)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP50057747A JPS5834291B2 (ja) 1975-05-13 1975-05-13 カトウカンノウケグチブケイセイホウホウ
GB16854/76A GB1523073A (en) 1975-05-13 1976-04-26 Flexible pipe with a socket section and method of producing the same
NLAANVRAGE7604713,A NL170604C (nl) 1975-05-13 1976-05-04 Werkwijze voor het vormen van een mofeinde aan een pijp van elastisch vervormbaar materiaal.
SE7605294A SE421185B (sv) 1975-05-13 1976-05-10 Sett att framstella plastror med muff och plastror framstellt enligt settet
DE2620639A DE2620639C3 (de) 1975-05-13 1976-05-10 Kunststoffrohr mit Rohrmuffe
US05/685,152 US4124422A (en) 1975-05-13 1976-05-11 Method of producing flexible pipe with socket section
FR7614336A FR2310853A1 (fr) 1975-05-13 1976-05-12 Tuyau souple a emboitement et son procede de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50057747A JPS5834291B2 (ja) 1975-05-13 1975-05-13 カトウカンノウケグチブケイセイホウホウ

Publications (2)

Publication Number Publication Date
JPS51132283A JPS51132283A (en) 1976-11-17
JPS5834291B2 true JPS5834291B2 (ja) 1983-07-26

Family

ID=13064482

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50057747A Expired JPS5834291B2 (ja) 1975-05-13 1975-05-13 カトウカンノウケグチブケイセイホウホウ

Country Status (7)

Country Link
US (1) US4124422A (ja)
JP (1) JPS5834291B2 (ja)
DE (1) DE2620639C3 (ja)
FR (1) FR2310853A1 (ja)
GB (1) GB1523073A (ja)
NL (1) NL170604C (ja)
SE (1) SE421185B (ja)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7809245A (nl) * 1978-09-11 1980-03-13 Wavin Bv Mofbuisdeel met aangegoten vasthoudring.
JPS55115682A (en) * 1979-02-27 1980-09-05 Sekisui Chemical Co Ltd Manufacture of pipe with socket
US4258855A (en) * 1979-07-05 1981-03-31 The Continental Group, Inc. Adhesive application of two-part container
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Also Published As

Publication number Publication date
NL170604C (nl) 1982-12-01
DE2620639A1 (de) 1976-11-18
FR2310853B1 (ja) 1980-09-05
GB1523073A (en) 1978-08-31
SE421185B (sv) 1981-12-07
NL7604713A (nl) 1976-11-16
US4124422A (en) 1978-11-07
DE2620639C3 (de) 1979-11-08
FR2310853A1 (fr) 1976-12-10
JPS51132283A (en) 1976-11-17
SE7605294L (sv) 1976-11-14
DE2620639B2 (de) 1979-03-15

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