CA1060372A - Trimming and emptying device for bulk material - Google Patents
Trimming and emptying device for bulk materialInfo
- Publication number
- CA1060372A CA1060372A CA294,753A CA294753A CA1060372A CA 1060372 A CA1060372 A CA 1060372A CA 294753 A CA294753 A CA 294753A CA 1060372 A CA1060372 A CA 1060372A
- Authority
- CA
- Canada
- Prior art keywords
- rake
- storage chamber
- vertical transport
- bulk material
- walls
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/36—Devices for emptying from the top
- B65G65/365—Devices for emptying from the top comprising a vertical passage located inside the container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
- B63B27/22—Arrangement of ship-based loading or unloading equipment for cargo or passengers of conveyers, e.g. of endless-belt or screw-type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/02—Loading or unloading machines comprising essentially a conveyor for moving the loads associated with a device for picking-up the loads
- B65G65/06—Loading or unloading machines comprising essentially a conveyor for moving the loads associated with a device for picking-up the loads with endless scraping or elevating pick-up conveyors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G67/00—Loading or unloading vehicles
- B65G67/60—Loading or unloading ships
- B65G67/606—Loading or unloading ships using devices specially adapted for bulk material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ship Loading And Unloading (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Auxiliary Methods And Devices For Loading And Unloading (AREA)
- Vending Machines For Individual Products (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The specification describes a device used to trim and empty bulk material in a cargo or storage room. The device consists of at least one raking device capable of vertical and transverse movement in the direction of motion of the bulk with at least one similar raking device at an angle to the first. These raking devices are used in conjunction with one another to move the bulk material towards at least one vertical transporting device. This device is distinguishable over the prior state of the art in that it can compensate for variations in width of the bulk material storage container.
The specification describes a device used to trim and empty bulk material in a cargo or storage room. The device consists of at least one raking device capable of vertical and transverse movement in the direction of motion of the bulk with at least one similar raking device at an angle to the first. These raking devices are used in conjunction with one another to move the bulk material towards at least one vertical transporting device. This device is distinguishable over the prior state of the art in that it can compensate for variations in width of the bulk material storage container.
Description
~0~;037'~
The present invention relates to a trimming and emptying device for bulk material in a cargo or storage room, comprising at least one raking device which is arranged to move the bulk material in one of the main directions of the room and which is movable vertically and transversally of the direction of motion ofthe bulk material.
A device of this type is shown for instance in French Patent Nos~l 343 751 and 911 594. By the use of such devices, for instance in a ship, for unloading the ship, it will be necessary to move the bulk material up an inclined plane to one or more band conveyors running transversally of the direction the bulk material is being moved by the raking devices. The band conveyors take up space and tllus reduce the net cargo volume of the room. Besides, since the band conveyors are placed near the bottom of the ship, access for repair and maintenance work is difficult.
In certain shipboard uses, especially in larger ships, frames, reinforcing plates and webs often protrude into the cargo room, thus making it impossible for the raking devices to remove the bulk material adjacent to the outer walls of the room. Furthermore, the raking devices will not be able to cover the entire cross section of the room should the room have varying width in the vertical direction since the guiding beams of the raking devices are dependent upon vertical guides.
The object of the invention is to provide a trimming and emptying device of the above type which remedy some of the deficiencies and drawbacks mentioned above.
This is obtained according to the invention by a device having the features set forth in the main claim. Further
The present invention relates to a trimming and emptying device for bulk material in a cargo or storage room, comprising at least one raking device which is arranged to move the bulk material in one of the main directions of the room and which is movable vertically and transversally of the direction of motion ofthe bulk material.
A device of this type is shown for instance in French Patent Nos~l 343 751 and 911 594. By the use of such devices, for instance in a ship, for unloading the ship, it will be necessary to move the bulk material up an inclined plane to one or more band conveyors running transversally of the direction the bulk material is being moved by the raking devices. The band conveyors take up space and tllus reduce the net cargo volume of the room. Besides, since the band conveyors are placed near the bottom of the ship, access for repair and maintenance work is difficult.
In certain shipboard uses, especially in larger ships, frames, reinforcing plates and webs often protrude into the cargo room, thus making it impossible for the raking devices to remove the bulk material adjacent to the outer walls of the room. Furthermore, the raking devices will not be able to cover the entire cross section of the room should the room have varying width in the vertical direction since the guiding beams of the raking devices are dependent upon vertical guides.
The object of the invention is to provide a trimming and emptying device of the above type which remedy some of the deficiencies and drawbacks mentioned above.
This is obtained according to the invention by a device having the features set forth in the main claim. Further
- 2 -~0~037Z
advantageous features of the invention are set forth in the dependent claims.
For improved understanding of the invention it will be described with references to the examples shown in the drawings.
Fig. 1 shows a cross section trough the cargo room of a ship where a trimming and emptying device according to the invention is installed without a bulky horisontal band conveyor in the lower part of the cargo room.
Fig. 2 shows a cross section of a ship cargo room having warying width in the vertieal direction.
Fi~. 3 shows a longitudinal cross section trough a eargo room of the ship with a deviee aecording to the invention.
Fig. 4 shows a part of the device according to the invention from Fig. 1 at a larger scale, while Fig. 5 shows the device in Fig. 4 viewed in the direetion of the arrows V-V.
In Fig. 1 is shown a eross section of a ship hull 1 with a eargo room 2 in which is installed a raking device 3. The raking device is able to move bulk cargo in the longitudinal direetion of the ship, i.e. perpendieular to the plane of the ship, and is transversally moveable to the longitudinal diree-tion of the ship along guiding beams 4 which in turn is move-able vertieally in guides (not shown) at its ends. Furthermore, at one end of the raking deviee 3 a similar raking deviee 5 is arranged e~tending at an angle with the raking deviee 3, preferably transversally of the latter. The transverse raking device 5 is able to move the bulk cargo towards a vertical transporting deviee 6 placed for instance near one side of the ~argo room. In the embodiment shown, the vertical transporting 3Q device 6 takes the form of bucket conveyor delivering bulk 1()f~0~'72 cargo to a band conveyor 7 on the deck of the ship. Instead of a bucked conveyor, ascrew conveyor or any other suitable vertical transporting device may be used. The transverse raking device S may be devided in two or more raking devices delivering bulk cargo to the same or separate vertical transporting devices.
ThetranSverSe raking device is moveable vertically, for in-stance by means of suspension members ~ of variablelength. The transverse raking device is preferably held at a somewhat lower level than the main raking device 3 so that a certain ~0 slip angle is obtained from the latter. Thus the material falls under the acti~on of gravity, resulting in energy savings.
By using a transverse raking device together with a vertical transporting device, a higher degree of filling of the cargo room is obtained since the dead volume beneath inclined planes leading to the transverse band conveyors, is avoided.
Furthermore, repair and maintenance work becomes easier because the rakes at all times may be situated above the cargo.
Fig. 2 shows how a raking device is installed in a cargo room 2 with substantially varying width in the vertical ~0 direction. The raking device 3 with the guide beam generally designated,4 are shown in solid line in the upper position and in broken line in a lower position. The lower position illustrates how the guide beam 4 i5 constituted by two outer sections 4' telescopicly arranged in middle section 4". The ~5 outer sections 4' of the guide beam are intheirouter extension equipped with rollers 9 or the like gliding in guides 10 which generally follow the sidewalls of the cargo room. The middle section 4" of the guide beam is shorter than the smallest distance between the guides 10.
The middle section 4" of the guide beam may alternatively ~, _ 10~037~
be arranged floating on the two outer sections 4' in order for it to be moveable with the raking device 3 all the way out to the guides 10 even when the guide beam is located in a lower position. Thereby, possible problems are avoided since the raking device 3 does not have to be moved from the middle section 4" to one of the outer sections 4', or vice versa.
Fig. 3 shows a longitudinal cross section through the cargo room 2. It is furnished with a main rake 3 which moves bulk material in the longitudinal direction of the cargo room, a transverse rake 5 and a vertical transporting device 6. The main rake 3 is equipped with an excavating arm means 11 which is moveable and pivotably arranged on the rake. By means of the e~cavating arm, bulk material may be extracted from between frames 12 and stiffening plates 13 so that the main rake 3, resp. the transverse rake 5 may move the material towards the vertical transporting device. Since the excavating unit is movable on the rake, it is able to reach all re-maining material between or on protrusion so that the vessel in most cases may be completely unloaded without further equipment.
Fig. 4 shows in greater detail an especially suitable embodiment of the transporting device 6. It is constituted by a band conveyor with buckets 14 attached to a number of endless chains 15 running over upper and lower driving and turning wheels 16,of which only the lower one is shown.
That part of the bucket conveyor which at any time lies below the level of the surrounding bulk materiaL is protected by plates 17 which are attached to chains which run over lower turning wheels 19. The plates 17 and the chains 18 together forma roll-.ront type devicewhose upper edge 20, as is best shown 5 _ ~0~037'~
in Fig. 5, may be withdrawn to expose the bucket conveyor as the level of the bulk material is reduced. The upper edge 20 of the roll-front device is at all times held somewhat lower than the transverse rake 5 so that the bulk material may slide from the end of the rake down into the buckets 14 of the conveyor.
The expression "vertical transporting device" used in the preceding description and in the following claims is not meant to be restricted to a transportingdevice arranged absolutely vertically in the room, but may comprise any suitable transporting device able to move the bulk material from a lower to a higher level. Furthermore, more than one vertical transporting device may be arranged in a single room where this may be deemed expedient.
advantageous features of the invention are set forth in the dependent claims.
For improved understanding of the invention it will be described with references to the examples shown in the drawings.
Fig. 1 shows a cross section trough the cargo room of a ship where a trimming and emptying device according to the invention is installed without a bulky horisontal band conveyor in the lower part of the cargo room.
Fig. 2 shows a cross section of a ship cargo room having warying width in the vertieal direction.
Fi~. 3 shows a longitudinal cross section trough a eargo room of the ship with a deviee aecording to the invention.
Fig. 4 shows a part of the device according to the invention from Fig. 1 at a larger scale, while Fig. 5 shows the device in Fig. 4 viewed in the direetion of the arrows V-V.
In Fig. 1 is shown a eross section of a ship hull 1 with a eargo room 2 in which is installed a raking device 3. The raking device is able to move bulk cargo in the longitudinal direetion of the ship, i.e. perpendieular to the plane of the ship, and is transversally moveable to the longitudinal diree-tion of the ship along guiding beams 4 which in turn is move-able vertieally in guides (not shown) at its ends. Furthermore, at one end of the raking deviee 3 a similar raking deviee 5 is arranged e~tending at an angle with the raking deviee 3, preferably transversally of the latter. The transverse raking device 5 is able to move the bulk cargo towards a vertical transporting deviee 6 placed for instance near one side of the ~argo room. In the embodiment shown, the vertical transporting 3Q device 6 takes the form of bucket conveyor delivering bulk 1()f~0~'72 cargo to a band conveyor 7 on the deck of the ship. Instead of a bucked conveyor, ascrew conveyor or any other suitable vertical transporting device may be used. The transverse raking device S may be devided in two or more raking devices delivering bulk cargo to the same or separate vertical transporting devices.
ThetranSverSe raking device is moveable vertically, for in-stance by means of suspension members ~ of variablelength. The transverse raking device is preferably held at a somewhat lower level than the main raking device 3 so that a certain ~0 slip angle is obtained from the latter. Thus the material falls under the acti~on of gravity, resulting in energy savings.
By using a transverse raking device together with a vertical transporting device, a higher degree of filling of the cargo room is obtained since the dead volume beneath inclined planes leading to the transverse band conveyors, is avoided.
Furthermore, repair and maintenance work becomes easier because the rakes at all times may be situated above the cargo.
Fig. 2 shows how a raking device is installed in a cargo room 2 with substantially varying width in the vertical ~0 direction. The raking device 3 with the guide beam generally designated,4 are shown in solid line in the upper position and in broken line in a lower position. The lower position illustrates how the guide beam 4 i5 constituted by two outer sections 4' telescopicly arranged in middle section 4". The ~5 outer sections 4' of the guide beam are intheirouter extension equipped with rollers 9 or the like gliding in guides 10 which generally follow the sidewalls of the cargo room. The middle section 4" of the guide beam is shorter than the smallest distance between the guides 10.
The middle section 4" of the guide beam may alternatively ~, _ 10~037~
be arranged floating on the two outer sections 4' in order for it to be moveable with the raking device 3 all the way out to the guides 10 even when the guide beam is located in a lower position. Thereby, possible problems are avoided since the raking device 3 does not have to be moved from the middle section 4" to one of the outer sections 4', or vice versa.
Fig. 3 shows a longitudinal cross section through the cargo room 2. It is furnished with a main rake 3 which moves bulk material in the longitudinal direction of the cargo room, a transverse rake 5 and a vertical transporting device 6. The main rake 3 is equipped with an excavating arm means 11 which is moveable and pivotably arranged on the rake. By means of the e~cavating arm, bulk material may be extracted from between frames 12 and stiffening plates 13 so that the main rake 3, resp. the transverse rake 5 may move the material towards the vertical transporting device. Since the excavating unit is movable on the rake, it is able to reach all re-maining material between or on protrusion so that the vessel in most cases may be completely unloaded without further equipment.
Fig. 4 shows in greater detail an especially suitable embodiment of the transporting device 6. It is constituted by a band conveyor with buckets 14 attached to a number of endless chains 15 running over upper and lower driving and turning wheels 16,of which only the lower one is shown.
That part of the bucket conveyor which at any time lies below the level of the surrounding bulk materiaL is protected by plates 17 which are attached to chains which run over lower turning wheels 19. The plates 17 and the chains 18 together forma roll-.ront type devicewhose upper edge 20, as is best shown 5 _ ~0~037'~
in Fig. 5, may be withdrawn to expose the bucket conveyor as the level of the bulk material is reduced. The upper edge 20 of the roll-front device is at all times held somewhat lower than the transverse rake 5 so that the bulk material may slide from the end of the rake down into the buckets 14 of the conveyor.
The expression "vertical transporting device" used in the preceding description and in the following claims is not meant to be restricted to a transportingdevice arranged absolutely vertically in the room, but may comprise any suitable transporting device able to move the bulk material from a lower to a higher level. Furthermore, more than one vertical transporting device may be arranged in a single room where this may be deemed expedient.
Claims (11)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Apparatus for emptying bulk material from a storage chamber, said apparatus comprising first rake means in said storage chamber for transporting material in the storage chamber in a first direction therein, means for moving said first rake means vertically, means for moving said first rake means transversely of said first direction, vertical transport means for transporting material from the storage chamber upwardly for removal from said storage chamber, second rake means in said storage chamber extending at an angle with respect to said first rake means for transporting material in the storage chamber in a second direction therein to said vertical transport means, and means for moving said second rake means vertically, said second rake means being positioned adjacent one end of said first rake means for receiving material transported by said first rake means in said first direction and for transporting the material in said second direction to said vertical transport means.
2. Apparatus as claimed in Claim 1 wherein said vertical transport means comprises bucket means for transporting the material upwards for removal from the storage chamber.
3. Apparatus as claimed in Claim 1 wherein said first and second rake means extend in horizontal planes at right angles to one another.
4. Apparatus as claimed in Claim 3 comprising excavating arm means on said first rake means for moving bulk material at the perimeter of the storage chamber towards the first raking means.
5. Apparatus as claimed in Claim 1 wherein said vertical transport means comprises cover plates extending vertically adjacent said second rake means and means for progressively moving said cover plates downwardly as the storage chamber is emptied of material.
6. Apparatus as claimed in Claim 5 wherein said vertical transport means further comprises means connecting said cover plates in roll-front manner.
7. Apparatus as claimed in Claim 6 wherein said vertical transport means further comprises vertically arranged band means, said cover plates being attached to said band means, and roller means drivingly engaging said band means.
8. Apparatus as calimed in claim 7 where said roller means is located proximate the bottom of said vertical transport means.
9. Apparatus as claimed in Claim 1 wherein said storage chamber is substantially rectangular and includes opposite pairs of bounding walls, said vertical transport means being located proximate one of said walls.
10. Apparatus as claimed in Claim 9 wherein said first rake means' extends parallel to one of said pair of walls, the second rake means extending parallel to the other of said pair of walls, the wall which the vertical transport means is proximate to being one of said one pair of walls.
11. Apparatus as claimed in Claim 1 wherein said second rake means is positioned at a level below said first rake means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA307,576A CA1059054A (en) | 1977-01-17 | 1978-07-17 | Trimming and emptying device for bulk material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO770132A NO138442C (en) | 1977-01-17 | 1977-01-17 | TRIM AND DEVICE DEVICE FOR SHARED GOODS. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1060372A true CA1060372A (en) | 1979-08-14 |
Family
ID=19883300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA294,753A Expired CA1060372A (en) | 1977-01-17 | 1978-01-11 | Trimming and emptying device for bulk material |
Country Status (10)
| Country | Link |
|---|---|
| JP (2) | JPS5391273A (en) |
| BE (1) | BE862933A (en) |
| CA (1) | CA1060372A (en) |
| DE (2) | DE2800226C2 (en) |
| DK (1) | DK143544C (en) |
| FI (1) | FI66156C (en) |
| GB (2) | GB1567878A (en) |
| NL (2) | NL183991C (en) |
| NO (1) | NO138442C (en) |
| SE (2) | SE437966B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5781203U (en) * | 1980-11-05 | 1982-05-19 | ||
| NO147376C (en) * | 1981-01-05 | 1984-07-03 | Norsk Hydro As | SHIPPING AND HANDLING EQUIPMENT FOR BULKGODS |
| JPS59194939A (en) * | 1983-04-15 | 1984-11-05 | Hitachi Ltd | Powdered material storing and delivery device |
| NO154688C (en) * | 1983-10-26 | 1986-12-03 | Kaare Haahjem | BULKGODS CLEANING DEVICE. |
| NO175742C (en) * | 1990-04-11 | 1994-11-30 | Patos As | Emptying device for bulk goods in cargo or storage room |
| NO300586B1 (en) * | 1991-06-27 | 1997-06-23 | Walter Nilsen | Device by self-releasing system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE240140C (en) * | ||||
| US2720326A (en) * | 1953-04-27 | 1955-10-11 | Wisconsin Farmco Service Coope | Box car unloader |
| FR1343751A (en) * | 1962-10-12 | 1963-11-22 | Automatic device for driving powdery and granular products, in particular for filling and emptying silos | |
| US3588182A (en) * | 1968-06-25 | 1971-06-28 | Gifford Hill Western | Silo unloader apparatus and process |
| GB1248991A (en) | 1969-02-11 | 1971-10-06 | Flexible Conveyor Company Ltd | Improvements in or relating to the loading or unloading of ship's holds |
| FR2175309A5 (en) * | 1972-03-09 | 1973-10-19 | Bretagne Atel Chantiers | |
| US3777429A (en) * | 1972-08-28 | 1973-12-11 | R Koser | Silo door construction |
| JPS5326304Y2 (en) * | 1974-12-26 | 1978-07-04 | ||
| US3980186A (en) * | 1975-08-18 | 1976-09-14 | Supreme Farmstead Equipment, Inc. | Silage handling apparatus |
-
1977
- 1977-01-17 NO NO770132A patent/NO138442C/en unknown
- 1977-12-29 DK DK586577A patent/DK143544C/en not_active IP Right Cessation
-
1978
- 1978-01-04 DE DE2800226A patent/DE2800226C2/en not_active Expired
- 1978-01-04 DE DE2827623A patent/DE2827623C2/en not_active Expired
- 1978-01-10 SE SE7800238A patent/SE437966B/en not_active IP Right Cessation
- 1978-01-11 CA CA294,753A patent/CA1060372A/en not_active Expired
- 1978-01-12 FI FI780093A patent/FI66156C/en not_active IP Right Cessation
- 1978-01-16 NL NLAANVRAGE7800482,A patent/NL183991C/en not_active IP Right Cessation
- 1978-01-16 BE BE184343A patent/BE862933A/en not_active IP Right Cessation
- 1978-01-17 GB GB29809/78A patent/GB1567878A/en not_active Expired
- 1978-01-17 GB GB1837/78A patent/GB1567877A/en not_active Expired
- 1978-01-17 JP JP365978A patent/JPS5391273A/en active Granted
- 1978-05-02 SE SE7805002A patent/SE7805002L/sv unknown
- 1978-07-07 NL NL7807358A patent/NL7807358A/en unknown
- 1978-09-20 JP JP53115738A patent/JPS5825615B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1567878A (en) | 1980-05-21 |
| DK143544C (en) | 1983-07-25 |
| FI66156C (en) | 1984-09-10 |
| NL183991B (en) | 1988-10-17 |
| JPS5391273A (en) | 1978-08-10 |
| NL183991C (en) | 1989-03-16 |
| NO770132L (en) | 1978-05-29 |
| BE862933A (en) | 1978-05-16 |
| SE437966B (en) | 1985-03-25 |
| JPS5825615B2 (en) | 1983-05-28 |
| FI780093A (en) | 1978-07-18 |
| FI66156B (en) | 1984-05-31 |
| JPS5733250B2 (en) | 1982-07-16 |
| JPS5455978A (en) | 1979-05-04 |
| NO138442C (en) | 1978-09-06 |
| DK143544B (en) | 1981-09-07 |
| DK586577A (en) | 1978-07-18 |
| SE7800238L (en) | 1978-07-18 |
| DE2800226C2 (en) | 1985-01-03 |
| NL7800482A (en) | 1978-07-19 |
| GB1567877A (en) | 1980-05-21 |
| NL7807358A (en) | 1978-10-31 |
| DE2800226A1 (en) | 1978-07-20 |
| NO138442B (en) | 1978-05-29 |
| SE7805002L (en) | 1978-07-18 |
| DE2827623C2 (en) | 1984-12-20 |
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