US3925964A - Arrangement for pulling a tube of heat-shrinkable plastic downwardly over a stack of goods - Google Patents

Arrangement for pulling a tube of heat-shrinkable plastic downwardly over a stack of goods Download PDF

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Publication number
US3925964A
US3925964A US536297A US53629774A US3925964A US 3925964 A US3925964 A US 3925964A US 536297 A US536297 A US 536297A US 53629774 A US53629774 A US 53629774A US 3925964 A US3925964 A US 3925964A
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US
United States
Prior art keywords
tube
conveyors
pair
goods
stack
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 - Lifetime
Application number
US536297A
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English (en)
Inventor
Richard Birkenfeld
Friedrich Wieligmann
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.)
Maschinenfabrik E Moellers GmbH and Co
Original Assignee
Maschinenfabrik E Moellers GmbH and Co
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
Priority claimed from DE19742422935 external-priority patent/DE2422935C3/de
Application filed by Maschinenfabrik E Moellers GmbH and Co filed Critical Maschinenfabrik E Moellers GmbH and Co
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Publication of US3925964A publication Critical patent/US3925964A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/13—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the preformed tubular webs being supplied in a flattened state
    • B65B9/135—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the preformed tubular webs being supplied in a flattened state for palletised loads

Definitions

  • the tube is gradually Friedrich wieligmann, Sennlich, opened by spreading its contacting flattened surfaces both of Germany and pleated edges and then individual spaced pleated portions along each edge are gripped by pairs of conl l Asslgneci Flrma MOlleI'S, Maschmenfabflk, veyors for pulling each of the pleated edges in an op- Bcckum, Germany posite direction so that the tube is opened into a gen- [22] FiledZ Dec. 26, 1974 erally rectangular shape.
  • the present invention is directed to an arrangement for pulling a tubular section of heat-shrinkable plastic downwardly over a stack of goods where the tubular section is taken from a supply of a flattened plastic tube with pleated longitudinally extending edges, with the flattened tube being gradually opened first by a guide member and then by oppositely directed pairs of conveyors until the desired shape is attained for passing over the stack of goods, then gripping members are inserted into the lower end of the tubular section and are displaced outwardly for holding the section in the shape required for passage over the stack of goods so that no contact between the goods and the tubular section takes place and then moving the gripping members downwardly and pulling the tubular section over the stack of goods.
  • the tube has a pleated portion held between each of the clamping jaws as it is pulled over the stack of goods and, as a result, after the jaws are opened the tubular ,section is in a much more expanded state than is actually required for pulling the tube in contact-free relation over the stack of goods.
  • the tube materials must be capable of shrinking within wide limits and considerable amounts of heat must be applied to achieve the shrinkage, so that the tubular section tightly encloses the stack of goods.
  • This particular wrapping operation is disadvantageous for goods which are packed in heatsensitive materials.
  • the primary object of the present invention is to provide an arrangement for pulling a tube over a stack of goods with the tube having an optimum cross section for enclosing the goods and where the overall height of the apparatus employed is maintained at a minimum with a resultant reduction in the cost of the apparatus.
  • gripping means arranged to be positioned below the outlet ends from the conveyor belts for holding and spreading the tube and for moving it in the downward direction;
  • displacing members each associated with one of the pair of conveyor belts and arranged to withdraw the pleated edges from the conveyor belts after a section of the tubing has been severed and welded at its upper end at a position located above the conveyor belts.
  • the device for displacing the tubular section from the conveyors is a pivotally mounted lever associated with each pair of conveyors.
  • the lever is located above and extends substantially parallel to the pair of conveyor belts with its pivoted end located adjacent the downstream end of the conveyor belts. Accordingly, when the lever is pivoted its free end moves downwardly toward the inlet end to the conveyors and commences the removal of the tubular section from between the cooperating conveyor belts.
  • the structure used for gripping the lower end of the tubular section is provided by upright posts of a relatively low height which can be displaced upwardly into the open end of the tubular section and then moved apart to stretch the section to its desired shape for passage over the stack of goods.
  • upright posts With the upright posts gripping the lower end of the tubular section, it can be pulled downwardly over the goods and the low height of the posts affords easy insertion into and withdrawal from the lower end of the tubular section and assures a considerable reduction in the overall height of the apparatus used for enclosing the stack of goods.
  • the upright posts are formed by short rod members with a rounded-off head which extends laterally outwardly from the rod.
  • This construction of the posts assures that the lower end of the tubular section is firmly held as it is pulled downwardly over the stack and assures ease in withdrawing the upright post after the completion of the downward movement of the tubular section.
  • the pairs of conveyor belts which grip the pleated portions of the tube and pull them apart are pivotally mounted at their inner or adjacent ends so that the outer ends can be pivotally displaced for adaptation to different stack sizes.
  • the pair of or double conveyor belts are arranged for pivotal movement about the inner reversing wheel axle of the lower one of the conveyor belts. With this arrangement there is no displacement of the point at which the tube is introduced into the inlet ends of the pair of conveyors.
  • the conveyor belts are arranged so that they can define a variable rectangularly shaped space in accordance with the different stack sizes to be enclosed by the heat-shrinkable plastic tube.
  • the upright posts which are positionable within the lower end of the tube after it leaves the conveyors, can be adjusted for adaptation to various stack sizes.
  • FIG. 1 is a side view of an apparatus embodying the present invention and positioned to commence the downward movement of an opened flattened tube over a stack of goods;
  • FIG. 2 is a side view similar to FIG. 1 but with the open tube moved downwardly partially enclosing the stack of goods;
  • FIG. 3 is a view similar to FIGS. 1 and 2 but with the tube pulled downwardly for completely enclosing the stack of goods and with a next section of the tube in position for enclosing another stack of goods;
  • FIG. 4 is a top view of a portion of the apparatus shown in FIG. 1.
  • an upright frame 1 is shown spanning the track 2 on which is supported a stack of goods 3.
  • the frame 1 has a rectangularly shaped transverse c'ross section and it extends laterally outwardly from and upwardly above the track 2 so that the upper surface of the stack of goods 3 is located below the upper end of the frame.
  • a roll 4 mounted on one side of the frame 1 is a roll 4 on which a flattened tube 5 of heat-shrinkable plastic material is wound with both of the longitudinally extending sides or edges of the tube provided with a plurality of pleats.
  • the guide element 8 has an inverted V-shaped and is mounted for movement in the vertical direction from the position shown in FIG. 1 to the position shown in FIG. 2, the purpose of the two different positions will be explained later.
  • a cutting unit 9 and a welding unit 10. Spaced laterally outwardly from the guide element 8 in the position shown in FIG. 1 and below the guide element 8 in the position shown in FIG. 2 are a cutting unit 9 and a welding unit 10. As can be seen in FIG. 2, the cutting unit 9 and the welding unit 10 can be operated when the guide element 8 is moved into its upper position.
  • Each pair of conveyor belts 11 Located below the guide element 8 on each side of the frame, note FIG. 4, are two pairs of conveyor belts 11 having their inlet ends arranged to receive the tube from the guide element. Each pair of conveyors extends outwardly at a slight downward slope.
  • Each pair of conveyor belts consists of an upper belt and a lower belt with the reversing axle of the lower conveyor belt at the inlet end of the pair of conveyor belts being pivotally mounted so that the downwardly sloping orientation of the belts can be varied, note the arrows in FIGS. l-3, for changing the distance measured in the horizontal direction between the inlet and outlet ends of the pair of conveyor belts. As can be noted in FIG.
  • the two pairs of conveyor belts on the opposite sides of the frame define two sides of a rectangular space the dimensions of which can be varied by pivoting the outlet ends of each pair of conveyor belts and also by varying the horizontal distance between the double pairs of conveyor belts on the opposite sides of the frame 1.
  • Each pair of conveyor belts 11 has an associated pivotally mounted lever 12 which extends in substantially parallel relation with its associated conveyor belts.
  • the lever 12 is pivotally mounted on the fixed point 13 by means of a pivoting mechanism 14. As illustrated in FIG. 4, each lever 12 is spaced slightly inwardly of the pair of conveyor belts with which it is associated and is positioned above the upper one of the conveyor belts.
  • endless revolving chains 15 which extend for about the full height of the frame, that is, for the full height of its upright members.
  • a carriage 16 is mounted on each of the chains 15 and extends inwardly toward the outlet end of the pairs of conveyor belts.
  • a short rod or upright post 17 extends upwardly from the carriage and terminates in a rounded-off enlarged head 18, that is, the surfaces of the rounded head project outwardly from the surfaces of the upright post 17.
  • Each of the upright posts is adjustable both in its longitudinal direction and in a direction transverse to the longitudinal direction for adaptation to the different dimensions above the stacks of goods 3 to be wrapped or enclosed by the heat-shrinkable plastic material.
  • the drive of the driving rollers 7 is cut off and the carriages 16 are moved upwardly for introducing the upright posts 17 within the open end of the tube.
  • the carriages 16 are stopped and the posts are moved transversely of the height dimension of the frame 1 toward the periphery of the frame, that is, in the outward direction, so that the lower end of the tube is tightly held by the posts 17 in a rectangular form sufficient to pass downwardly over and outwardly from the four comers of the stack, note FIG. 1.
  • the upright posts 17 pass downwardly laterally outwardly from the sides of the stack 3 so that the tube passes in contact-free relation with the stack.
  • the driving rollers 7, the pairs of conveyor belts 11, and the chains are actuated simultaneously and the tube is pulled downwardly about the upper portion of the stack 3 into the position shown in FIG. 2.
  • the guide element 8 is displaced upwardly to the position in FIG. 2 and the cutting unit 9 and the welding unit 10 are actuated for cutting off a section of the tube and welding it closed so that it can form a cover over the top of the stack of material.
  • gripping tongs could be used in place of the upright posts 17 and the preliminary spreading or opening action of the flattened tube could be formed by suction devices or other opening elements.
  • Apparatus for placing a tube of heat-shrinkable plastic over a stack of goods by moving the tube over the goods the tube is originally supplied flattened in a roll with longitudinally extending pleating sides extending along the flattened side of the tube
  • the apparatus including first means for removing the flattened tube from the roll and partially opening the tube, second means for receiving the partially opened tube from said first means and for opening and spreading the tube, third means for severing a section of the tube and closing the severed end after a partial movement of the tube by said second means, and said second means arranged to move the severed section of the tube over the goods
  • said second means includes conveyor means arranged to receive the partially opened tube at each of its opposite pleated sides from said first means for moving the tube from said first means and for continuing to spread the pleated sides while holding at least a portion of the pleated sides, said conveyor means having an inlet end arranged to receive the partially opened tube from said first means and an outlet end, gripping means located adjacent the outlet end of said conveyor
  • said conveyor means comprises four pairs of conveyors with each pair comprising a first conveyor belt and an oppositely disposed second conveyor belt arranged so that a pleated portion of the tube can be held and moved between them, each of two of the four said pairs of conveyors defining one side of a generally rectangular space, said two pairs of conveyors defining one side being in end-to-end alignment at the inlet end of said conveyor means with the adjacent ends each arranged 7 to receive a spaced pleated portion of the partially opened tube passing from said first means, and each pair of conveyors in the two pair of said conveyors along one side of the rectangular space arranged to move the pleated portion of the tube held between them in opposite directions.
  • each said pair of conveyors is pivotally mounted at its inlet end so that the outlet end of each said pair of conveyors can be displaced relative to the inlet end for accommodating the opening of the tube to the cross-sectional size of the goods to be covered.
  • said displacing means comprises a pivotally displaceable lever associated with each said pair of conveyors and arranged to be pivoted in a path intercepting the path of movement of the tube between the inlet and outlet ends of said pair of conveyors with which it is associated for displacing the pleated portion of the tube from gripped engagement between said pair of conveyors.
  • each said first conveyor is positioned above said second conveyor with which it forms a pair
  • each said pivotally displaceable lever is positioned upwardly from the upper one of the pair of said conveyors with which it is associated and is arranged to extend in generally parallel relation with said pair of conveyors and also to extend for approximately the length of said conveyors
  • each said lever being pivoted at the end adjacent the outlet end of said conveyors with which it is associated, each said lever spaced inwardly from said pair of conveyors with which it is associated toward said pair of conveyors on the opposite sides of the rectangular space defined by the conveyors, and means for pivoting each said conveyor so that it moves downwardly from its position in parallel relation with said pair of conveyors into contact with the tube held by each said pair of conveyors for displacingthe tube from engagement between each said pair of conveyors.
  • each said pair of conveyors is arranged to incline outwardly and downwardly from its inlet end relative to the other said pair with which it defines one side of a generally rectangular shape
  • said gripping means comprises a plurality of upright posts with each said upright post arranged to be aligned below one comer of the rectangular space defined by the outlet ends of said conveyors, and means associated with said upright posts so that they can be moved in the upward-downward direction and transversely thereto in the inward-outward direction for effecting insertion into the lower end of the tube as it passes downwardly from the conveyors for further spreading the lower end of the tube out- 8 wardly and for moving the tube downwardly over the stack of goods.
  • each said upright post has a thickened head portion extending laterally outwardly from the lateral surface of said post.
  • said gripping means includes a carriage for each said upright post, an upright support member, said carriage mounted on said upright support member for movement in the upward-downward direction, and said upright post secured to said carriage and movable therewith in the upward-downward direction.
  • Apparatus as set forth in claim 9, wherein said carriage is arranged to move transversely of the upward-downward direction for moving said post attached thereto for spreading the open end of the and for adjusting the position of said post to accommodate various transverse cross-sectional sizes of the stack of goods.
  • each said first conveyor is positioned above said second conveyor with which it forms a pair
  • each said pair of conveyors is arranged to incline outwardly and downwardly from its inlet end relative to the other said pair with which it defines one side of a generally rectangular space
  • each said pair of conveyors is pivotally mounted about the axis at the inlet end of the lower one of said conveyors of each said pair.
  • each said pair of conveyors is mounted for movement toward and away from the pair of said conveyors on the opposite side of the rectangular space defined by said four pairs of conveyors for adjusting the position of said conveyors to the cross-sectional sides of the stack of goods to be enclosed.
  • Apparatus as set forth in claim 9, including an upright frame, said upright support members for said carriages forming the corner members of said frame, said frame also forming a support for said first means, said third means and said displacing means.
  • Apparatus as set forth in claim 10, including a vertically endless chain mounted on each said upright support member and arranged to be driven in the upwardand downward direction, and each said carriage attached to one of said endless chains for movement in the upward-downward direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Basic Packing Technique (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Packaging Of Special Articles (AREA)
US536297A 1974-05-11 1974-12-26 Arrangement for pulling a tube of heat-shrinkable plastic downwardly over a stack of goods Expired - Lifetime US3925964A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742422935 DE2422935C3 (de) 1974-05-11 Vorrichtung zum Überziehen eines Schlauches aus wärmeschrumpffähigem Kunststoff über einen Gutstapel

Publications (1)

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US3925964A true US3925964A (en) 1975-12-16

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US536297A Expired - Lifetime US3925964A (en) 1974-05-11 1974-12-26 Arrangement for pulling a tube of heat-shrinkable plastic downwardly over a stack of goods

Country Status (10)

Country Link
US (1) US3925964A (fr)
JP (1) JPS553206B2 (fr)
BR (1) BR7405315A (fr)
CA (1) CA1011639A (fr)
ES (1) ES426844A1 (fr)
FR (1) FR2270149B1 (fr)
GB (1) GB1450484A (fr)
IT (1) IT1014796B (fr)
NL (1) NL173616B (fr)
SE (1) SE404160B (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064678A (en) * 1975-11-04 1977-12-27 Nutro Patentverwertungs-Und Maschinen-Handels Gmbh Apparatus for drawing a side-folded tube over piled objects
US4481754A (en) * 1980-07-05 1984-11-13 Msk-Verpackungs-Systeme Gesellschaft M.B.H. Equipment for covering stacked goods with shrinkable hoods
US4546598A (en) * 1982-04-23 1985-10-15 Karpisek Ladislav Stephan Stretch wrapping apparatus
US4724658A (en) * 1986-06-25 1988-02-16 Mollers Maschinenfabrik Gmbh Arrangement for sliding and shrinking a hood of shrinking foil over and onto a stack
US5247783A (en) * 1990-09-13 1993-09-28 Develog, Reiner Hannen & Cie System for wrapping palletized goods
US20030154693A1 (en) * 2000-04-28 2003-08-21 Reiner Hannen Method and device for wrapping unit loads or packaged goods
US20050115206A1 (en) * 2002-04-19 2005-06-02 Reiner Hannen Device and method for wrappping unit loads or packaged goods
EP1580127A1 (fr) * 2004-03-26 2005-09-28 AETNA GROUP S.p.A. Machine pour envelopper des groupes d'objets d'un film tubulaire en matériau étirable
US7040076B2 (en) * 2000-08-09 2006-05-09 Lachenmeier A/S Method for packaging objects
WO2007071063A1 (fr) * 2005-12-23 2007-06-28 Les Plastiques Balcan Limitée Appareil pour ensacher un matériau
US20100005761A1 (en) * 2008-07-14 2010-01-14 Bradley Arthur Bennett Automatic cart bagger
US20130133290A1 (en) * 2010-06-30 2013-05-30 Dominik Tebeck Packaging device and method for the operation thereof
US20150135643A1 (en) * 2013-11-15 2015-05-21 Conecraft, Inc. Bag Lift Assembly for a Lined Bulk Material Container
US20190152632A1 (en) * 2016-07-07 2019-05-23 Signode Industrial Group Llc Packaging method and stretch hood system
CN115258299A (zh) * 2022-08-12 2022-11-01 东莞市沃德精密机械有限公司 自动套膜机
US11492155B2 (en) 2020-05-14 2022-11-08 Signode Industrial Group Llc Stretch-hood machine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5265782A (en) * 1975-11-28 1977-05-31 Agency Of Ind Science & Technol Equipment for producing belt=shaped crystal
FR2573030B1 (fr) * 1984-11-12 1987-09-25 Newtec Int Procede et machine d'emballage d'une charge dans un troncon de gaine en un materiau souple
CN107934080A (zh) * 2017-11-08 2018-04-20 上海拜基自动化设备有限公司 一种套膜包装设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3621638A (en) * 1969-05-09 1971-11-23 Diethelm Grocke Apparatus for covering pallets with tubular shaped foil or sheeting
US3676980A (en) * 1969-06-16 1972-07-18 Drohmann Gmbh C Apparatus for wrapping bulky or stacked objects

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4828160A (fr) * 1971-08-17 1973-04-13

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3621638A (en) * 1969-05-09 1971-11-23 Diethelm Grocke Apparatus for covering pallets with tubular shaped foil or sheeting
US3676980A (en) * 1969-06-16 1972-07-18 Drohmann Gmbh C Apparatus for wrapping bulky or stacked objects

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064678A (en) * 1975-11-04 1977-12-27 Nutro Patentverwertungs-Und Maschinen-Handels Gmbh Apparatus for drawing a side-folded tube over piled objects
US4481754A (en) * 1980-07-05 1984-11-13 Msk-Verpackungs-Systeme Gesellschaft M.B.H. Equipment for covering stacked goods with shrinkable hoods
US4546598A (en) * 1982-04-23 1985-10-15 Karpisek Ladislav Stephan Stretch wrapping apparatus
US4724658A (en) * 1986-06-25 1988-02-16 Mollers Maschinenfabrik Gmbh Arrangement for sliding and shrinking a hood of shrinking foil over and onto a stack
US5247783A (en) * 1990-09-13 1993-09-28 Develog, Reiner Hannen & Cie System for wrapping palletized goods
US20030154693A1 (en) * 2000-04-28 2003-08-21 Reiner Hannen Method and device for wrapping unit loads or packaged goods
US6845600B2 (en) * 2000-04-28 2005-01-25 Msk-Verpackungs-Systeme Gesellschaft Mit Beschrankter Haftung Method of wrapping an object with an elastic foil
US7040076B2 (en) * 2000-08-09 2006-05-09 Lachenmeier A/S Method for packaging objects
US7234289B2 (en) * 2002-04-19 2007-06-26 Msk-Verpackungs-Systeme Gesellschaft Mit Beschrankter Haftung Method of fitting a packaging hood over a load
US20050115206A1 (en) * 2002-04-19 2005-06-02 Reiner Hannen Device and method for wrappping unit loads or packaged goods
US20070151211A1 (en) * 2002-04-19 2007-07-05 Reiner Hannen Device and method for wrapping unit loads or packaged goods
EP1580127A1 (fr) * 2004-03-26 2005-09-28 AETNA GROUP S.p.A. Machine pour envelopper des groupes d'objets d'un film tubulaire en matériau étirable
WO2007071063A1 (fr) * 2005-12-23 2007-06-28 Les Plastiques Balcan Limitée Appareil pour ensacher un matériau
US20070220831A1 (en) * 2005-12-23 2007-09-27 Ludovic Leplatois Apparatus for bagging material
US7861500B2 (en) * 2008-07-14 2011-01-04 Bradley Arthur Bennett Automatic cart bagger
US20100005761A1 (en) * 2008-07-14 2010-01-14 Bradley Arthur Bennett Automatic cart bagger
US20130133290A1 (en) * 2010-06-30 2013-05-30 Dominik Tebeck Packaging device and method for the operation thereof
US20150135643A1 (en) * 2013-11-15 2015-05-21 Conecraft, Inc. Bag Lift Assembly for a Lined Bulk Material Container
US20190152632A1 (en) * 2016-07-07 2019-05-23 Signode Industrial Group Llc Packaging method and stretch hood system
US11097860B2 (en) * 2016-07-07 2021-08-24 Signode Industrial Group Llc Packaging method and stretch hood system
US11492155B2 (en) 2020-05-14 2022-11-08 Signode Industrial Group Llc Stretch-hood machine
US11827392B2 (en) 2020-05-14 2023-11-28 Signode Industrial Group Llc Stretch-hood machine
CN115258299A (zh) * 2022-08-12 2022-11-01 东莞市沃德精密机械有限公司 自动套膜机

Also Published As

Publication number Publication date
FR2270149B1 (fr) 1978-07-07
SE7407142L (sv) 1975-11-12
SE404160B (sv) 1978-09-25
DE2422935B2 (de) 1977-03-10
DE2422935A1 (de) 1975-11-20
FR2270149A1 (fr) 1975-12-05
JPS553206B2 (fr) 1980-01-24
NL7409523A (nl) 1975-11-13
CA1011639A (en) 1977-06-07
JPS50144590A (fr) 1975-11-20
NL173616B (nl) 1983-09-16
BR7405315A (pt) 1976-11-30
ES426844A1 (es) 1976-07-16
IT1014796B (it) 1977-04-30
GB1450484A (en) 1976-09-22
AU7857175A (en) 1976-08-26

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