EP0142006A2 - Water supply device for a washing machine - Google Patents
Water supply device for a washing machine Download PDFInfo
- Publication number
- EP0142006A2 EP0142006A2 EP84111919A EP84111919A EP0142006A2 EP 0142006 A2 EP0142006 A2 EP 0142006A2 EP 84111919 A EP84111919 A EP 84111919A EP 84111919 A EP84111919 A EP 84111919A EP 0142006 A2 EP0142006 A2 EP 0142006A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- supply device
- water supply
- dispenser
- water
- tongue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/02—Devices for adding soap or other washing agents
- D06F39/028—Arrangements for selectively supplying water to detergent compartments
Definitions
- a water supply device for a washing machine comprising a programmer, a water dispenser, means for detecting the different phases of a wash cycle and means for the connection between the means for detecting the different phases of a wash cycle and the water dispenser.
- the present washing machines use the wash water for the draw of detergents or bleaching products or "softeners” (that will be called hereafter generically additives), that before entering the wash tank is made flow in the vessels containing the additives, so that it may carry them in the wash tank.
- the supply of water is carried out by using various ways solenoid valves and various connecting pipes among the various ways of the valves and the vessels. The inconveniences of said kind of water supply are evident, since it is expensive, encumbering and rigid.
- aim of the present invention is to overcome the abovesaid inconveniences and to show a wash water supply device for a washing machine using a very simple, not too expensive dispenser permitting in the meantime a precise adjustment of the initial position of the dispenser, and permitting the draw of the additives with hot or cold water in all the wash phases.
- the present invention relates to a water supply device for a washing machine comprising a programmer, a water dispenser, means for detecting the different phases of a wash cycle and means for the connection between the means for detecting the different phases of a wash cycle and the water dispenser characterized in that it comprises means embodying both the adjustment for a correct position of the dispenser and the clamping of the connection means between the means for detecting the different phases of a wash cycle and the water dispenser.
- a container 1 formed by a cover 2 and by a body 3 for the draw and the distribution of water to the various vessels.
- On the cover 2 are got a first pipe 4 and a second pipe 5 for the draw of hot or cold water converging in a single inlet pipe 6 inside the container 1; four tabs 7 along its sides, one of which is sectioned, two exterior guides 8 and a hooking tooth 9 on its bottom, for its hooking to the body 3 of the container 1; a circular clearance hole 10, through which it is inserted a dispenser 11; a cavity 12; a projecting ring 13 surrounding the hole 10, around which it is positioned a resetting spring 14 and four reference notches A,B,C and D one of which is used for the initial positioning of a small lever 15 and the other ones for a check, during the test, of the position of said small lever 15.
- the body 3 of the container 1 presents along its sides, in correspondence of the tabs 7 of the cover 2, four brackets 16, one of which is sectioned, and in its bottom three openings not visible in the figures in correspondence of the guides 8 and of the tooth 9 of the cover 2 permitting the hooking and the fastening of the cover 2 of the body 3 of the container 1.
- the dispenser 11 is made of a spout 18, for the dispensing of water in the various pipes of the cover 2, which is partially in the air for getting an air gap in the way of the water according to the safety rules and by an inlet hole, not visible in the figure, which is countersunk for making easier the inlet of water coming from the inlet pipe 6 of the container 1.
- the inlet of the dispenser 11 is surrounded by a semicylinder 19 acting as a guard for eventual spots of water that might escape from the inlet and is topped by a cylinder 20, that in its upper part presents a rectangular projection 21 and in its middle a hole 22.
- the small lever 15 presents a first central hole 23 around which, in the lower part of the small lever 15, is got a rectangular recess 24; a second lateral hole 25, for the initial positioning of the small lever 15; a third hole 26 for the fastening of an end of the resetting spring 14; a sharp projection 27 in correspondence of the reference notches of the cover 2, with a function of index and a lodging 28, presenting an elastic reed 29 at whose lower end is present a check tooth 30 of triangular shape.
- a tongue 31 is inserted presenting various triangular teeth 32 and a hole 33.
- a screw 49 used for fastening the small lever 15 on the dispenser 11.
- an end of a tie rod 34 is inserted, whose other end is fastened to a hook 35 of a detector lever 36.
- the detector lever 36 presents also a first projection 37; a second projection 38, at whose end there is a spacer 39 and a flexible hinge (thin film plastic) 40 that connects it to a foot 41.
- the foot 41 presents a number of lateral grooves 42 and a tooth 43, by which the detector lever 36 is hinged on a sheet 44 presenting a carving, not visible in the figures, and a hole 45.
- the sheet 44 is then fastened to the frame-work of the washing machine by means of screws, bolts or rivets 46.
- the first projection 37 of the detector lever 36 is pressed against a cam wheel 47, steadily connected to the timer of the washing machine, whereas the second projection 38 of the detector lever 36, by means of its spacer 39 that touches a bracket not visible in the figures, assures that the first projection 37 always remains in the plane of the cam wheel 47. In the figure 4 it is also visible a wheel 48 of the washing machine timer.
- the mounting of the water supply device being subject of the present invention is carried out by making respectively the following operations: the foot 41 of the detector lever 36 is connected to the sheet 44 by inserting the lateral grooves 42 in the proper carving and by pressing till the tooth 43 of the detector lever 36 goes to hinge in the hole 45 of the sheet 44; an end of the tie rod 34 is connected to the hook 35 of the detector lever 36; the cylinder 20 of the dispenser 11 is inserted in the hole 10 of the cover 2 of the container 1; the resetting spring 14 is positioned around the projecting ring 13 of the cover 2, clamping an end of the resetting spring to the cover; the small lever 15 is inserted on the dispenser 11, so that the rectangular projection 21 of the cylinder 20 can be inserted in the corresponding rectangular recess 24 of the small lever 15 and at the same time the other end of the spring 14 is inserted in the hole 26 of the small lever 15; the screw 49 has to be inserted and screwed so that the dispenser 11 and the small lever 15 remain steadily connected; the other end of the tie rod 34 has to be
- the washing machine timer is to be positioned in a precise working condition; a pin is to be inserted in the hole 25 of the small lever 15 and in the corresponding cavity 12 of the cover 2, so that the small lever 15 is clamped in that point; in these conditions the projection 27 of the small lever 15 is in correspondence of one of the four notches A,B,C or D; at last. the tongue 31 has to be pulled till the block consisting of the tie rod 34 and the tongue 31 is stretched.
- the adjustment of the distance between the tie rod 34 and the tongue 31, and consequently the initial position of the dispenser 11, can be adjusted with very high precision since even very little displacements are possible, as the distance between the teeth 32 is very little (about a millimetre).
- the pin After the adjustment of the initial position of the dispenser 11 the pin is taken off from the hole 25 and from the cavity 12 and the small lever 15 together with the dispenser 11 connected with it may turn around their rotation axis.
- the resetting spring 14 assures that the tie rod 34 is stretched and consequently that the projection 37 of the detector lever 36 is always in touch with the cam wheel 47.
- the position of the dispenser 11 and of the small lever 15 depends on the position of the cam wheel 47, which is determined by the washing machine timer.
- the detector lever 36 changes its slope according to the position of the cam wheel 47 bending more or less around its flexible hinge 40, and how with said solution the use of a pin and of a bolt is avoided.
- the procedure of hooking of the cover 2 on the body 3 is the following: the cover 2 is inserted and made slide on the upper part of the body 3 till the exterior guides 8 of the cover 2 insert themselves inside the lateral openings of the body 3 and the tooth 9 of the cover 2 inserts itself inside the central opening of the body 3 and hooks to it. In this position also the tabs 7 of the cover 2 are inserted inside the brackets 16 of the body 3 and the cover 2 results fastened to the body 3 without any possibility of displacements in any direction.
- the body 3 of the container 1 is fastened to the frame-work of the washing machine by means of screws.
- said device permits a very precise initial adjustment of the dispenser, the draw of the additives for the wash with hot or cold water in all the wash phases, and the working of the detector lever by using a flexible hinge, the mounting of the cover on the body by means of a clamping fastening and at last it is very simple , reliable and not too expensive.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
Description
- \ It is described a water supply device for a washing machine comprising a programmer, a water dispenser, means for detecting the different phases of a wash cycle and means for the connection between the means for detecting the different phases of a wash cycle and the water dispenser.
- It is known that the present washing machines use the wash water for the draw of detergents or bleaching products or "softeners" (that will be called hereafter generically additives), that before entering the wash tank is made flow in the vessels containing the additives, so that it may carry them in the wash tank. It is also known that in order to draw the additives from the various vessels during the various wash phases, the supply of water is carried out by using various ways solenoid valves and various connecting pipes among the various ways of the valves and the vessels. The inconveniences of said kind of water supply are evident, since it is expensive, encumbering and rigid. In fact a number of pipes and ways of solenoid valves equal to the number of vessels for the additives have to be used, consequently if more than two or three vesselss have to be supplied, four for example, we will be compelled to use two two-ways valves and four pipes, and if we would arrange also the supplying of hot water the costs and especially the encumbrances of solenoid valves and pipes would become excessive.
- It is also known that said inconveniences have been overcome by neans of supply systems that use a water dispenser for sending the water to the various pipes and permitting the use of a single one-way solenoid valve and of a single pipe. Said dispenser being operated by the timer of the washing machine by means of a cam wheel and a rod or a system of levers and springs. But also these devices present various inconveniences. In fact in the devices using a connection. rod, for adjusting the right initial position of the dispenser, a small hole is carried out in the rod and suitably adjusting the opening of said small hole the length of the rod is adjusted and consequently also the initial position of the dispenser. Said adjustment method is however very rough and it may occur that part of the water used for a certain vessel goes also in the neighbouring vessels. The systems using groups of levers and springs permits a better adjustment of the initial position of the dispenser, but they are very complex and expensive.
- Thus aim of the present invention is to overcome the abovesaid inconveniences and to show a wash water supply device for a washing machine using a very simple, not too expensive dispenser permitting in the meantime a precise adjustment of the initial position of the dispenser, and permitting the draw of the additives with hot or cold water in all the wash phases.
- With these aims in view the present invention relates to a water supply device for a washing machine comprising a programmer, a water dispenser, means for detecting the different phases of a wash cycle and means for the connection between the means for detecting the different phases of a wash cycle and the water dispenser characterized in that it comprises means embodying both the adjustment for a correct position of the dispenser and the clamping of the connection means between the means for detecting the different phases of a wash cycle and the water dispenser.
- Further aims and advantages of the present invention will result clear from the following detailed description and from the attached drawings given only as an explanatory and non-restrictive example, in which:
- figure 1 shows an exploded view of the main components forming the supply device being subject of the present invention, with a partial particular,
- figure 2 shows a partial top view of the essential components of the supply device being subject of the present invention after their mounting,
- figure 3 shows a cross section of a particular shown in figure 2, and
- figure 4 shows a partial view of the washing machine timer and of a detector lever according to the present invention.
- With reference to figures 1,2,3,4, we can note a container 1 formed by a
cover 2 and by abody 3 for the draw and the distribution of water to the various vessels. On thecover 2 are got a first pipe 4 and a second pipe 5 for the draw of hot or cold water converging in a single inlet pipe 6 inside the container 1; fourtabs 7 along its sides, one of which is sectioned, two exterior guides 8 and a hooking tooth 9 on its bottom, for its hooking to thebody 3 of the container 1; acircular clearance hole 10, through which it is inserted adispenser 11; acavity 12; a projectingring 13 surrounding thehole 10, around which it is positioned a resettingspring 14 and four reference notches A,B,C and D one of which is used for the initial positioning of asmall lever 15 and the other ones for a check, during the test, of the position of saidsmall lever 15. In the inner part of thecover 2 four pipes are got, not visible in the figures, that radially diverge in the zone in which thedispenser 11 is placed and that converge in four upper tanks, not visible in the figures, drilled along their perimeter for permitting the water drain. Said water will touch the sides of four lower tanks not visible in the figures presented by a drawer that is inserted between thecover 2 and thebody 3 of the container 1, in which are placed the additives for the wash of clothes. - The
body 3 of the container 1 presents along its sides, in correspondence of thetabs 7 of thecover 2, fourbrackets 16, one of which is sectioned, and in its bottom three openings not visible in the figures in correspondence of the guides 8 and of the tooth 9 of thecover 2 permitting the hooking and the fastening of thecover 2 of thebody 3 of the container 1. - The
dispenser 11 is made of aspout 18, for the dispensing of water in the various pipes of thecover 2, which is partially in the air for getting an air gap in the way of the water according to the safety rules and by an inlet hole, not visible in the figure, which is countersunk for making easier the inlet of water coming from the inlet pipe 6 of the container 1. The inlet of thedispenser 11 is surrounded by asemicylinder 19 acting as a guard for eventual spots of water that might escape from the inlet and is topped by acylinder 20, that in its upper part presents a rectangular projection 21 and in its middle a hole 22. - The
small lever 15 presents a firstcentral hole 23 around which, in the lower part of thesmall lever 15, is got arectangular recess 24; a secondlateral hole 25, for the initial positioning of thesmall lever 15; athird hole 26 for the fastening of an end of the resettingspring 14; asharp projection 27 in correspondence of the reference notches of thecover 2, with a function of index and alodging 28, presenting anelastic reed 29 at whose lower end is present acheck tooth 30 of triangular shape. In the slot 28 atongue 31 is inserted presenting varioustriangular teeth 32 and ahole 33. In the figure 1 is also visible ascrew 49 used for fastening thesmall lever 15 on thedispenser 11. In thehole 33 of thetongue 30 an end of atie rod 34 is inserted, whose other end is fastened to ahook 35 of adetector lever 36. - The
detector lever 36 presents also afirst projection 37; asecond projection 38, at whose end there is a spacer 39 and a flexible hinge (thin film plastic) 40 that connects it to a foot 41. The foot 41 presents a number oflateral grooves 42 and a tooth 43, by which thedetector lever 36 is hinged on asheet 44 presenting a carving, not visible in the figures, and ahole 45. Thesheet 44 is then fastened to the frame-work of the washing machine by means of screws, bolts orrivets 46. Thefirst projection 37 of thedetector lever 36 is pressed against acam wheel 47, steadily connected to the timer of the washing machine, whereas thesecond projection 38 of the detector lever 36, by means of its spacer 39 that touches a bracket not visible in the figures, assures that thefirst projection 37 always remains in the plane of thecam wheel 47. In the figure 4 it is also visible awheel 48 of the washing machine timer. - The mounting of the water supply device being subject of the present invention is carried out by making respectively the following operations: the foot 41 of the
detector lever 36 is connected to thesheet 44 by inserting thelateral grooves 42 in the proper carving and by pressing till the tooth 43 of thedetector lever 36 goes to hinge in thehole 45 of thesheet 44; an end of thetie rod 34 is connected to thehook 35 of thedetector lever 36; thecylinder 20 of thedispenser 11 is inserted in thehole 10 of thecover 2 of the container 1; the resettingspring 14 is positioned around the projectingring 13 of thecover 2, clamping an end of the resetting spring to the cover; thesmall lever 15 is inserted on thedispenser 11, so that the rectangular projection 21 of thecylinder 20 can be inserted in the correspondingrectangular recess 24 of thesmall lever 15 and at the same time the other end of thespring 14 is inserted in thehole 26 of thesmall lever 15; thescrew 49 has to be inserted and screwed so that thedispenser 11 and thesmall lever 15 remain steadily connected; the other end of thetie rod 34 has to be connected to thehole 33 of thetongue 31 and the latter has to be inserted in theslot 28 of thesmall lever 15. - In order to understand the adjustment of the initial position of the
dispenser 11 please note, with particular reference to figure 3, how the shape of thecheck tooth 30, of theslot 28 and of theteeth 32 of thetongue 31 is such that when thetongue 31 is pulled in a first direction, theteeth 32 push upwards theelastic reed 29 and the reciprocal sliding between theslot 28 and thetongue 31 results possible, whereas when thetongue 31 is pulled in the opposite direction thecheck tooth 30 touches one of theteeth 32 of thetongue 31, the sliding results impossible and the clamping of thetongue 31 in theslot 28 occurs. For carrying out said initial adjustment it is necessary to act on the total length of thetie rod 34 and of thetongue 31 in the following way: the washing machine timer is to be positioned in a precise working condition; a pin is to be inserted in thehole 25 of thesmall lever 15 and in thecorresponding cavity 12 of thecover 2, so that thesmall lever 15 is clamped in that point; in these conditions theprojection 27 of thesmall lever 15 is in correspondence of one of the four notches A,B,C or D; at last. thetongue 31 has to be pulled till the block consisting of thetie rod 34 and thetongue 31 is stretched. The adjustment of the distance between thetie rod 34 and thetongue 31, and consequently the initial position of thedispenser 11, can be adjusted with very high precision since even very little displacements are possible, as the distance between theteeth 32 is very little (about a millimetre). - After the adjustment of the initial position of the
dispenser 11 the pin is taken off from thehole 25 and from thecavity 12 and thesmall lever 15 together with thedispenser 11 connected with it may turn around their rotation axis. The resettingspring 14 assures that thetie rod 34 is stretched and consequently that theprojection 37 of thedetector lever 36 is always in touch with thecam wheel 47. The position of thedispenser 11 and of thesmall lever 15 depends on the position of thecam wheel 47, which is determined by the washing machine timer. - Please note how the detector lever 36 changes its slope according to the position of the
cam wheel 47 bending more or less around itsflexible hinge 40, and how with said solution the use of a pin and of a bolt is avoided. - Please also note how the two pipes 4 and 5 for the draw of hot or cold water, by converging in a single inlet pipe 6 that sends the water to the inlet of the
dispenser 11 permit the draw of the additives with hot or cold water in all the wash phases. - Please note at last how the
tabs 7, the exterior guides 8 and the hooking tooth 9 of thecover 2 and thecorresponding brackets 16 and openings of thebody 3 of the container 1 permit a clamping fastening of thecover 2 on thebody 3, thus avoiding the use of screws. In fact the procedure of hooking of thecover 2 on thebody 3 is the following: thecover 2 is inserted and made slide on the upper part of thebody 3 till the exterior guides 8 of thecover 2 insert themselves inside the lateral openings of thebody 3 and the tooth 9 of thecover 2 inserts itself inside the central opening of thebody 3 and hooks to it. In this position also thetabs 7 of thecover 2 are inserted inside thebrackets 16 of thebody 3 and thecover 2 results fastened to thebody 3 without any possibility of displacements in any direction. At last thebody 3 of the container 1 is fastened to the frame-work of the washing machine by means of screws. - From the description effected the advantages of the water supply device for a washing machine being subject of the present invention result clear.
- In particular they are represented by the fact that said device permits a very precise initial adjustment of the dispenser, the draw of the additives for the wash with hot or cold water in all the wash phases, and the working of the detector lever by using a flexible hinge, the mounting of the cover on the body by means of a clamping fastening and at last it is very simple , reliable and not too expensive.
- It is clear that numerous variations are possible to the water supply device described as an example, for the man skilled in the art, without departing from the scope of the present invention. One of them is to use an electronic programmer and proper means for detecting the wash cycle phases and the translation of the electric information into mechanical positions.
Claims (27)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT68188/83A IT1171046B (en) | 1983-11-15 | 1983-11-15 | WATER SUPPLY DEVICE FOR A WASHING MACHINE |
IT6818883 | 1983-11-15 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0142006A2 true EP0142006A2 (en) | 1985-05-22 |
EP0142006A3 EP0142006A3 (en) | 1985-06-19 |
EP0142006B1 EP0142006B1 (en) | 1989-01-11 |
Family
ID=11308404
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84111919A Expired EP0142006B1 (en) | 1983-11-15 | 1984-10-04 | Water supply device for a washing machine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0142006B1 (en) |
DE (1) | DE3476087D1 (en) |
IT (1) | IT1171046B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0839944A2 (en) * | 1996-11-04 | 1998-05-06 | Balay S.A. | Self-adjustable starting system for the water distributor in washing machine dispenser |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR640316A (en) * | 1927-08-31 | 1928-07-10 | Automatic wear compensator | |
FR1466760A (en) * | 1966-02-01 | 1967-01-20 | Falk Corp | Reaction arm |
DE2409450A1 (en) * | 1973-03-30 | 1974-10-10 | Zanussi A Spa Industrie | PRESELECTIVE DETERGENT DISPENSER FOR LIQUID CONTAINERS IN WASHING MACHINES |
FR2446883A3 (en) * | 1979-01-18 | 1980-08-14 | Zanussi A Spa Industrie | DETERGENT DISPENSER FOR WASHING MACHINE |
FR2454654A1 (en) * | 1979-04-20 | 1980-11-14 | Ferodo Sa | Adjustable length mechanical linkage - uses rotating elliptical part to adjust length, particularly for air vent operation in cars |
GB2104109A (en) * | 1981-07-21 | 1983-03-02 | San Giorgio Elettrodomesti | Unit for feeding wash liquid into a washing machine tub |
DE3204252A1 (en) * | 1982-02-08 | 1983-08-18 | Miele & Cie GmbH & Co, 4830 Gütersloh | DETERGENT DISCHARGE DEVICE FOR WASHING MACHINES |
-
1983
- 1983-11-15 IT IT68188/83A patent/IT1171046B/en active
-
1984
- 1984-10-04 EP EP84111919A patent/EP0142006B1/en not_active Expired
- 1984-10-04 DE DE8484111919T patent/DE3476087D1/en not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR640316A (en) * | 1927-08-31 | 1928-07-10 | Automatic wear compensator | |
FR1466760A (en) * | 1966-02-01 | 1967-01-20 | Falk Corp | Reaction arm |
DE2409450A1 (en) * | 1973-03-30 | 1974-10-10 | Zanussi A Spa Industrie | PRESELECTIVE DETERGENT DISPENSER FOR LIQUID CONTAINERS IN WASHING MACHINES |
FR2446883A3 (en) * | 1979-01-18 | 1980-08-14 | Zanussi A Spa Industrie | DETERGENT DISPENSER FOR WASHING MACHINE |
FR2454654A1 (en) * | 1979-04-20 | 1980-11-14 | Ferodo Sa | Adjustable length mechanical linkage - uses rotating elliptical part to adjust length, particularly for air vent operation in cars |
GB2104109A (en) * | 1981-07-21 | 1983-03-02 | San Giorgio Elettrodomesti | Unit for feeding wash liquid into a washing machine tub |
DE3204252A1 (en) * | 1982-02-08 | 1983-08-18 | Miele & Cie GmbH & Co, 4830 Gütersloh | DETERGENT DISCHARGE DEVICE FOR WASHING MACHINES |
Non-Patent Citations (1)
Title |
---|
RESEARCH DISCLOSURE, No. 214, February 1982, No. 21443, Pages 42-44. HAVANT HAMPSHIRE (GB) "Automatic dispensing system for laundry additives". * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0839944A2 (en) * | 1996-11-04 | 1998-05-06 | Balay S.A. | Self-adjustable starting system for the water distributor in washing machine dispenser |
EP0839944A3 (en) * | 1996-11-04 | 1999-01-07 | Balay S.A. | Self-adjustable starting system for the water distributor in washing machine dispenser |
Also Published As
Publication number | Publication date |
---|---|
IT8368188A0 (en) | 1983-11-15 |
EP0142006B1 (en) | 1989-01-11 |
DE3476087D1 (en) | 1989-02-16 |
EP0142006A3 (en) | 1985-06-19 |
IT1171046B (en) | 1987-06-10 |
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