CA1171001A - Conveyor device for a storage plant - Google Patents

Conveyor device for a storage plant

Info

Publication number
CA1171001A
CA1171001A CA000397858A CA397858A CA1171001A CA 1171001 A CA1171001 A CA 1171001A CA 000397858 A CA000397858 A CA 000397858A CA 397858 A CA397858 A CA 397858A CA 1171001 A CA1171001 A CA 1171001A
Authority
CA
Canada
Prior art keywords
storage
rails
storehouse
truck
rooms
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
CA000397858A
Other languages
French (fr)
Inventor
Giovanni Chiantella
Renato Lissoni
Christoph Gloor
Franco Biesuz
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.)
Cmf Costruzioni Metalliche Finsider SpA
F A T A EUROPEAN GROUP SpA
Original Assignee
Cmf Costruzioni Metalliche Finsider SpA
F A T A EUROPEAN GROUP SpA
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 Cmf Costruzioni Metalliche Finsider SpA, F A T A EUROPEAN GROUP SpA filed Critical Cmf Costruzioni Metalliche Finsider SpA
Application granted granted Critical
Publication of CA1171001A publication Critical patent/CA1171001A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G1/00Storing articles, individually or in orderly arrangement, in warehouses or magazines
    • B65G1/02Storage devices
    • B65G1/04Storage devices mechanical
    • B65G1/0407Storage devices mechanical using stacker cranes
    • B65G1/0414Storage devices mechanical using stacker cranes provided with satellite cars adapted to travel in storage racks

Abstract

ABSTRACT OF THE DISCLOSURE:
Conveyor device for a storage plant, comprising a lower truck, which in order to receive and store load units is equipped with at least two translation platforms that are operable independently of one another. The lower trucks, which are carried through the "hucke-pack" system by a re-spective bearing truck, are movable away from and to the bearing trucks on sliding rails in the storage shelves and positioned directly below the load units. A respective bearing truck and lower truck carried thereby form all to-gether a horizontal conveyor unit which in any case with a load unit from the hoist or elevator is transported between the floors and transfer station and is freely movable indepen-dently of the same in such floors. By the embodiment accord-ing to the invention of the means for holding loads on the lower truck with at least two translation platforms consist-ent with the load, more efficient storage strategies are provided for mixed storage of load units with at least two base surfaces of different size. A conveyor device according to the invention provides storage plants which through direct access to every storage room have improved characteristic values as to transport capability and space exploitation.

Description

This inven-tion relates generally to a -storage plant, comprising at least two floors, each of which having at least one longitudinal lane and storage shelves, which are situated at the two sides of the longitudinal lane, transversely of the latter, to hold load units that by means of a lower truck are displaceable in the storage partitions through a bearing truck designed to carry the lower truck, are movable in the longitudinal lanes, and are vertically movable by means of at least one hoist or elevator prearranged for holding bearing trucks with lower trucks.
For example, such conveyor devices are for inter-mediate storage of water-craft containers, which is carried out for transport by land and transport by sea.
In the French Patent No. 2,197,788 the storehouse partitions, that are arranged in floors of a storing Erame made of steel or reinforced concrete, are implemented in the form of a tunnel having special loading vehicles moving there-in. For the introduction and removal o~ the storehouse pro-duct an~ change of location for the loading vehicles between tunnel and floors at least one horizontally movable vertical hoist or elevator is provided, the translation platform of which is implemented to hold the loading vehicles and can be moved on the tunnel end, vertically and transversely of the tunnel. In this storage device disadvantageous are the rela-rively low transport height and moderate bearing force, pecu-liar for horizontally movable vertical hoists or eleva-tors.
As a result, the maximum constructive height of the storehouse is limited or restrictedr so that the ground foun-dation, which in the limits of harbour plants is mostly very narrow and expensive, cannot be exploited to the desired degree. Furthermore, the load units, such as containers and the like, are often of such a weight that for horizontally movable vertical hoists or elevators is an inadmissable s-tress.
In the storage device disclosed in the published ~, ~7~!7~

patent application of West Germany No. 2,406,378, a con-veyor truc~ and a holding truch are movable independently ofeach other on rails in the lanes be-tween the storehouse partitions, wherein the holding truck has a device by which individual articles can be transported from the storehouse partitions to the conveyor truck. This known type of storage device allows the other composition of articles wl-thin the storehouse, but requiring to this purpose a large heavy expense in equipmen-ts'. This particuIarly occurs for the conveyor means used, which are optimized on the highly specialized function of the order composition. For a simple storing of load units, such as containers and the like,'such order composition devices are a too large heavy expense and in no way cor-respond to the requirements for a rational'storehouseoperation. In addition,'as to manufacture and maintenance, they are also expensive and have a very bad degree of space exploitation.
It is the object of the present invention to propose a simple and effective conveyor device of the kind referred to at the beginning of this specification, which is optimized on mixed storage of load units having at least two base surfaces of difi'erent size and which by high storehouse availability assures a direct access to every storage room.
- It is also the object o~ the invention to provide a conveyor device, which can be integrated in the conventional course of container transfer on the harbour dock side, and particularly also has a good degree of space exploitation and is'economically advantageous.
This problem is solved by -the invention which relates to a storage plant comprising: at least two floors each of which is provided with adjacent storage roomsextending in a first direction and opening at one end into a longitudinal lane extendiny in a second direction normal to said firs-t direction.and having free access to all of said~open ends of said storage rooms;
elevator means, at one end of said lane, having a platform suitable to receive and move loads from one floor to the other; said plant further having rolling carriage travelling rails longitudinally located along both sides of said rooms toward said lane; like rails extending on either side of said lane and at the level of each of said floors, and further like rails extending on either side of said platform in alignment with said rails of said lane when said platform stands at the level of one of said floors; wherein said rails of said rooms are equally spaced apart and have top sur:Eaces at the same level; said storage plant further including a conveyor device comprising: a horizontally displaceable load.transpo.rting unit having: a main carriage provided with roller means sui:table for said main carriage to be displaced on said rails of said lane, on said :
: elevator means and on said rails of said elevator platform; :
~0 a pair of parallel rails extending transversely of said main carriage and spaced apart a distance equal to the ;~
distance.between.said rails of said rooms and having top ~urfaces lying at the same level as the top surfaces of . said storage rooms rails when said main carriage stands adjacen-t thereto; a secondary carriage having roller means suitable to allow displacement of said secondary carriage along said rails of said main carriage and along '~ ~ said rails.of said storage rooms; a pair of independently operably load handling means on said secondary carriage each having a vertically movable load handling platform movable between a fi.rst position wherein said load handling platform stands below the top surfaces of said storage room rails to a second position where it stands ~ thereabove.
: 35 Owing to these expedients, not only is ~ - 2a -,S ~

advangageously solved the task indica-ted as the basis of the invention, but a conveyor device is also, provided, which is optimized on mixed storage of load units wi-th base surfaces which are different from one another, ar.d accordingly offers the following advantages. -, - 2b -.

... .. ..

~7~
.~, EYen if relating to actual load units, loads of similar configuration are dealt with, normally such units cannot be referred to as an assembly of identical storage products. Ship containers, to the intermediate harbour dock side storage of which the present invention is concerned wi-th, are at present provided in the standard lengths of Z0 feet and 40 feet. By dividing the translation plat~orm consist-ently with the load, more efficient strategies result for storage, withdrawal and transfer of load units with base sur-faces of different size, so that for preassigned operativecriteria, an optimum storage operation is provided. Thus, for example, the power or capability of the conveyor means used is increased, and accordingly is improved the inexpensiveness of the storehouse as a whole.
Another advantageous effect of the invention is provided in that, as a result of the division of the transla~
tion platform consistently with the load and minimum expense, an inner transfer can be carried out also for short containers.
These transfers can be at any time easily and rapidly carried out with the aid of two translation platforms, both operable independently of each other, so that in the form of integrant component they can be included in the normal unloading opera-tion from the storehouse. This enables to align with one an-other determined storehouse rooms, for the best exploitation of the space as possible, without single access and provide the required direct access by inner passage to any room of the storehouse. It results therefrom a high exploitation of the storehouse base surface, which is mostly expensive in dock zones, where for requirements of practical storage operation the principle of direct access to every storage room is com-pletely assured.
~ further advantage may consist of that, owing to the modarate constructive height of the lower truck and trans-lation platform, the passage is allowed to the storage rooms ~ ,, below those occupied. This also allows to individually displace the short containers in the depth of the storehouse rooms, and accordingly improve the storage performances. In addition, as a result of the moderate size of the lower truck, storaye structures can be implemented with high degree of space exploitation.
The invention will be hereinafter described as applied to intermediate storage of ship containers between transport by land and -transport by sea. However, the princi-ple here considered as a basis, can be similarly adopted also for other load units, such as for example piece products on pallets.
Examplary embodiments are illustrated to further detail with reference to the accompanying drawings, in which:
Fig. 1 is a perspective view showing a part of stor-age plant comprising storehouse frame and conveyor device;
Fig. 2 schematically shows a fragmentary perspective view of a bearing truck with lower truck inserted in a store-house room;
Fig. 3 is a constructive drawing of the horizontal transport unit, comprising a bearing truck and lower truck carried thereby;
Fig. 4 is a perspective view schematically showing a storehouse room with a long container, as well as a horizon-ta] transporting unit;
Fig. 5 is a perspective view schematically showing a storehouse room with two short containers, as well as a hori-zontal transporting unit;
Fig. 6 is a perspective view schematically showing a storehouse room with containers of different lengtht as well as a horizontal transporting unit;
Fig. 7 is a plan view of a floor to show the storage and wlthdrawal rom storehouse of two short containers respec-tively in or from two storehouse rooms; and -3L~7~

Fig.~ is a plan view of a floor to show -the inner passage of the units~
The embodiment according to Figs~ 1, 2 and 3 shows a storage plant as comp~ising a bearing steel structure 1 having a plurality of storage frames 2, which are divided into floors 3 and individual storehouse rooms 4. Each floor 3 has a longitudinal lane 5 extending -throughout the length of the storage plant and from which storehouse rooms 4 branch off at right angles, that along said lane form each a row on both sides, and wherein the storehouse material is placed or stored.
sy the lane ends 6 thereo:Et said longitudinal lanes 5 open on one side to a hoist or elevator wellhole 7, so that in well known manner a vertical hoist or elevator 8 moves between said floors 3 and the transfer station 9. By a harbour portal or gantry crane 15 the incoming containers are prepared on the transfer station 9 to be received b~ a horizontal transporting uni-t and at the same time are registered for storehouse admin-istration.
The transport technique as a basis for the storage plant is grounded on the principle o:E dividing every movemen-t in the storehouse in accordance with three spatial axes and allottin~ to the same the following speciali~ed conveyor means, that is: a bearing truck 24 for the spatial axis OX along the longitudinal lanes 5, a lower truck -hucke-pack-- 23 carried by the bearing truck 24 for the spatiaI axis OY in the individual ; ; storehouse rooms 4, as well as a vertical hoist or elevator 3 fixed on site for the spatial axis O~ between a transfer sta-tion 9 and individual floors 3.
In Fig. 1, the arrows show the movements of the above mentioned conveyor means in said floors 3 and cage o~ elevator 7 and accordingly the path of the storehouse product in and out of the storehouse. In each floor 3 said longitudinal lane 5 is provided whith two sliding rails 10, 11, on which the bearing trucc 24 is longit~ ally or h~ri~ontally movable.

, ~731~

Also the platform 12 of the vertlcal hoist or elevator 8 is fitted with sliding rails 13~ 14, which at the stop locations of the vertical hoist or elevator 8 with said rails 10, 11 are ori.ented in the corresponding longitudinal lanes 5, so that said bearing truck 24 can~be di.splaced from any longitudinal lane 5 on the hoist or elevator platform 12 for transportation between the f].oors 3 and transfer station 9.
The lower truck -hucke-pack- carried by the bearing truck 24 is intended for automatic movement along the spartial axis OY in. the storehouse rooms 4, where two C-shaped rails 25, 26 are placed, on the lower flange 25.1, 26.1 of which a lower truck 23 is movable in a direction away from the bearing truck 24 and to the latter in the storehouse room 4, and on the upper flanges 25.2, 26.2 of which the unitary loads 40, 41, 42, 43, 44 are placed.
In addition to acting as a bearing or support for the conveyor trucks, that is for the storehouse material, said sliding rails 10, 11, 25, 26 form a part of the supporting elements for the storage frame.
A guide mechanism having laterally applied rollers prevents any jamming during advancement of forward movement.
. By providing a suitable positioning of the bearing truck 24 in the longitudinal lanes 5, the sliding rails 32, 33 thereof carrying the lower truck 23 can be aligned with the sliding rails 25, 26 in any storehouse room 4, whereupon the: :
lower truck 23 in on its sliding rollers 35 movable from the bearing truck 24 in the storehouse rooms 4, to receive or lay down therein load units 40, 41, 42, 43, 44 to be transported respectively~between the storehouse rooms.
To this end, the lower truck 23 is provided with a load holding means, which subtantially comprises at least -two translation platforms 27, 28, which as to the size thereof match with the corresponding base surEaces on the load units 40, 41, 42, 43, 44. In order to hold or deposit -the storehouse - 6 ~
', , material, such transl~tion platforms 27 and 28 consis-tent with the loads provide for positioning directly below the load units 40, ~1, 42, 43 and 44 to be lifted or lowered indepen-dently- of each other.
A respective bearing truck 24 and lowex truck 23 'hucke-pack-- carried thereby are rigidly associated with each other and form a horizontal transporting unit, which along with a load, that in any case is on the translation platforms 27 'and 28, can be transported by the vertical hoist or elevator 8 be-tween the floors 3 and transfer station 9, and as a self-con-tained transporting means freely moves in the floors indepen-dently of the vertical hoists or elevators.
The conveyor means, comprising a horizontal trans-porting units, and particularly the bearing truck 24 as well as the lower truck 23, have proper driving motors, acting upon the associated sliding rollers or wheels 31, 35, that is on the translation platforms 27, 28, so that they are automati-cally movable in the longitudinal lanes 5, respectively in the ~ storehouse rooms 4.
20 ~ The supply by electric energy is conventionally carried out, or by self-governing through batteries simulta-neously transported on the conveyor truck, or by contact shoes, by sliding contact lines, or bus kars extending along the path o the conveyor means, or by drawing cables.
Hereinafter, the operative modality of the novel conveyo~ deviçe is shown to further detail with reference to Figs. 1, 2, 3, 4, 5, 6, 7 and 8. 'What is particularly desired to show is how the equipment or outfit according to the inven-tion of said lower truck 23 with at least two translation plat-forms 27 and 28, which are independent of each other, makes possible novel types of storage strategies, improving the transport power or capability and accordingly the unexpensive~
ness of the storehouse as a whole. This is provided in that by the'novel storage strategies such idle strokes and transfer , strokes of the vertical hoists or elevators as -those hitherto requixed Eor mixed sto~ing of short and long containers are avoided. This optimum exploitation of vertical transports increases the transport power or capability, since in storage plants of this design the total transport power or capability is usually limited hy the vertical transports.
The typical operation course during storing will be shown for the case in which, as shown in Figs. 5 and 7, two short containers 41, 42 have to be placed on the storehouse rooms 46, 47, each container being 20 feet long. The long containers 40, which are 40 feet long, have the same size as the storehouse rooms 4, so that only one storehouse place 49 is available or the same and for each storehouse room. The containers 41, 42 from transport by land by means of -truck ~lorry) or railway are located by a harbour portal or gantry carne 15 on the transfer station 9 and simultaneoulsy regis tered for the storehouse administration. A horizontal trans-porting unit comprising a bearing truck 24 and lower truck 23 provides for direct mositioning below the containers 41, 42 and lifts the latter by the two translation platforms 27, 28 from the bearing in the transfer station 9.
Thus, the horizontal transporting unit rolls with the containers 41 and 42 to the hoist or elevator platform 12, where the rollers 31 are accomodated by the sliding rails 13, 25 ~ ~;14. After stop fo the hoist or elevator 8 at the preselected floor 3, the sliding rails 13, 1~ of the hoist or elevator platform 12 are aligned with the sliding rails 10, 11 in the respective longitudinal lanes 5, whereupon the horizontal transporting unit with the containers 41j 42 leave the hoist or elevator 8 and release the latter for vertical displacement of further horizontal transport units.
Now, the independently operated bearing truck 24 automatically rolls with the lower truck 23 carried thereby and with the two containers 41 and 42 respectively on the translatio~.platforms 27 and 2~, moving to in front of the storehouse room 4 intended for -the storehouse rnanaye~ent, where the contai~er 42 will have to be laid on the storehouse place 46. After alignment oE the sliding rails 33, 32 of the bearing truck with the sliding rails 25, 26 of the reached storehouse room, the lower truck 23 enters the storehouse room 4, so that through lowering of the translation platform 28 the container 42 lies on the storehouse place 42. Particu-larly, the platform 27 with the container 41 remains at lifted position, so tha-t the lower truck 23 with the container 41 lifted and platform 28 lowered, can move from the storehouse room 4 back onto the bearing truck 24, from which the store-house room with the storehouse places 47 and 48 is reached, as ; above mentioned. Now, the container 41 will be disposed on the storehouse place 47, as it i.s assumed that the storehouse place 48 is already occupied.
To this end, the already occupied storehouse place 48 is -travelled at the bottom with the free lowered translation platform 28 and due to the subsequent loweriny of the transla-tion platEorm 27, the container 41 is located on the storehouseplace 47. The lower truck 23 then moves with lowered transla-tion platforms 27, 28 moving back onto the bearing truck 24, where the horizontal transporting unit, at this point completed again, is awaiting the succesive transport order or command from the control system. It is thus evident that the direct storaye of the short containers 41 and 42, which have been together transported on the lower truck 23, on the storehouse places 46 and 47 is now possible as a result of the division .according to the invention of the means for receiving the loads : 30 in the two translation platforms 27 and 28.
As an example of a transfer operation, assume accord-ing to Figs. 5 and 7 that two short containers 41 and 42 on the storehouse places 51 and 52 have to be together transfered to the two sides of the longitudinal lane 5. After positioning in known manner of the horizon-tal transporting unit in front of the storehollse room 4 contai~ing the storehouse place 52, according to the invention the lower truck 23 moves from the bearing truck ~4 to the storehouse room 4 to pass below the short con.tain.er on the storehouse place 52 with ~he lowered translation platEorm 28. Then, the -translation platform 28 on the lower -truck 23 lifts the container from the support, then the whole mo~es back onto the bearing truck 24 awaiting in the longitudinal lane 5. ~hen, the storehouse room oE -the s-torehouse place 51 is reached, where likewise the correspond-ing container is received by the translation platform 27.
After the lower truck 23 and the short container carried there-by with the bearing truck 24 are joined again to form a hori-zontal transporting unit, it moves by an assig~ed vertical hoist or elevator 8 to the transfer station 9, whereby the withdrawal operation from the storehouse is terminated.
From this functional course, the fact is found that as a result according to the invention of equipping the lower truck 23 with two independent trans:Lation platforms 27 and 28, the storehouse can unload short containers 41 and 42 from - storehouse rooms 4 at the two si~es of the longitudinal lane 5 by a single pass and the least number as possible of storage movements. On the other hand, this would require an inner transfer with the additional expense resulting therefrom and relating to the storage movement and time as well.
By way of example, such inner transfers are required when.desiring to unload short containers from the storehouse, which containers are on storehouse places, to which a direct access from the longitudinal lanes 5 is impossible. This is 30 concerned, for example as shown in Fig. 8, with the storehouse places 54 and 56, that do not have any access due to short cGntainers located on -the storehouse places 55 and 57.
To arrive at short con-tai.ners on -the storchouse L)laces 54 and 56, the storehouse places 55 and 57 have to be cleared ~7~

before hand. To this end, the containers on the storehouse places 54 and 55 are received by the translation pl~tforms 27 and 28 of a horizontal transporting unit which successively is positioned in front o the storehouse room containing the free or cleared storehouse places 58 and 59. Then, the lower truck 23 moves on the sliding rails 25 and 26 to into this storehouse room to lay the container from the storehouse place 55 on the storehouse place 59 and during the return on the bearing truck 24 to change the container of the storehouse place 54 from the translation platform 27 onto the translation platform 28. Likewise but subsequently, the container on the storehouse place 57 is cleared and then the container on the storehouse place 56 is received by the translation platform 27. The containers of the storehouse places 54 and 56 are now on the translation platforms 27 and 28 of the lower truck 23 and can be transferred in well known manner.
~ his example shows that short containers, which in connection with a best space exploitation as possible are part ly stored without direct access, can be made directly acces-sible by inner transfer. Such transfers can be easily andreadily carried out through the aid of the two independent translation platforms 27 and 28, so that the latter in the form of integrating component can be included in the transfer opera-tion. For requirements of normal storehouse operation, this would correspond to the required direc-t access to the lnvolved storehouse places.
Of course, in order to assure the di~ect access, the required transfers can be also carried out accurately from the storehouse manager in periods of reduced traffic.

Claims (2)

The embodiments of the invention in which an exclusive property or privilge is claimed are defined as follows:
1. A storage plant comprising: at least two floors each of which is provided with adjacent storage roomsextending in a first direction and opening at one end into a longitudinal lane extending in a second direction normal to said first direction and having free access to all of said open ends of said storage rooms;
elevator means, at one end of said lane, having a platform suitable to receive and move loads from one floor to the other; said-plant further having rolling carriage travelling rails longitudinally located along both sides of said rooms toward said lane; like rails extending on either side of said lane and at the level of each of said floors, and further like rails extending on either side of said platform in alignment with said rails of said lane when said platform stands at the level of one of said floors; wherein said rails of said rooms are equally spaced apart and have top surfaces at the same level; said storage plant further including a conveyor device comprising: a horizontally displaceable load transporting unit having: a main carriage provided with roller means suitable for said main carriage to be displaced on said rails of said lane, on said elevator means and on said rails of said elevator platform;
a pair of parallel rails extending transversely of said main carriage and spaced apart a distance equal to the distance between said rails of said rooms and having top surfaces lying at the same level as the top surfaces of said storage rooms rails when said main carriage stands adjacent thereto; a secondary carriage having roller means suitable to allow displacement of said secondary carriage along said rails of said main carriage and along said rails of said storage rooms; a pair of independently operable load handling means on said secondary carriage each having a vertically movable load handling platform movable between a first position wherein said load handling platform stands below the top surfaces of said storage room rails to a second position where it stands thereabove.
2. A storage plant as claimed in claim 1, wherein said load handling platforms of said second storage have surfaces that differ in size from one another.
CA000397858A 1981-03-13 1982-03-08 Conveyor device for a storage plant Expired CA1171001A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT20348A/81 1981-03-13
IT20348/81A IT1136819B (en) 1981-03-13 1981-03-13 CONVEYOR DEVICE FOR A STORAGE SYSTEM

Publications (1)

Publication Number Publication Date
CA1171001A true CA1171001A (en) 1984-07-17

Family

ID=11165929

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000397858A Expired CA1171001A (en) 1981-03-13 1982-03-08 Conveyor device for a storage plant

Country Status (16)

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US (1) US4459078A (en)
JP (1) JPS57160804A (en)
AT (1) AT386177B (en)
BE (1) BE892445A (en)
CA (1) CA1171001A (en)
CH (1) CH651272A5 (en)
DE (1) DE3207860A1 (en)
DK (1) DK151706C (en)
ES (1) ES8301820A1 (en)
FR (1) FR2501649A1 (en)
GB (1) GB2094770B (en)
IT (1) IT1136819B (en)
NL (1) NL8200975A (en)
NO (1) NO155926C (en)
SE (1) SE440063B (en)
ZA (1) ZA821408B (en)

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DK101182A (en) 1982-09-14
FR2501649B1 (en) 1984-12-14

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