CA1079069A - Method and apparatus for manufacture of mineral wool - Google Patents
Method and apparatus for manufacture of mineral woolInfo
- Publication number
- CA1079069A CA1079069A CA260,070A CA260070A CA1079069A CA 1079069 A CA1079069 A CA 1079069A CA 260070 A CA260070 A CA 260070A CA 1079069 A CA1079069 A CA 1079069A
- Authority
- CA
- Canada
- Prior art keywords
- rotor
- air
- blades
- flow
- slot
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/04—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor
- C03B37/05—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor by projecting molten glass on a rotating body having no radial orifices
- C03B37/055—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor by projecting molten glass on a rotating body having no radial orifices by projecting onto and spinning off the outer surface of the rotating body
Abstract
Abstract of Disclosures:
A method for manufacture of mineral wool by which a flow of liquid melt is thrown off fast rotating rotors and cooled and transported to collecting means by means of a flow of air. According to the invention this flow of air besides an axial velocity component also has a tangential velocity component corresponding to tangential speed of the rotors at each point where air is introduced around the roto The invention further relates to a corresponding apparatus for performing the method.
A method for manufacture of mineral wool by which a flow of liquid melt is thrown off fast rotating rotors and cooled and transported to collecting means by means of a flow of air. According to the invention this flow of air besides an axial velocity component also has a tangential velocity component corresponding to tangential speed of the rotors at each point where air is introduced around the roto The invention further relates to a corresponding apparatus for performing the method.
Description
1 0~79 Q 6 9 The pres~nt inYentio~ relates to a method for the manufacture of miaeral wool, by which method of flow of liquid melt is diracted to the periph0ral surface of one or more fast rotating rotors in such a way that the melt adhere~ to tho Qurface or surfaces and i~ thrown therefro~ in for~ of fibres which are cooled and transport~d to a collecting station by a Plow of a~r b~ing introduced into the area of th0 periphery of the rotors. The in~ention further relate~ to an apparatus for performing the method.
In the manu~acture of mineral ~ool a flow of liquid melt at a temperature, which normally is in the area of 1000-1400C, produced by melting rock~ ~lag, glass-forming ra~-material~ and other inorganic materials ~n an oven, nor~ally a Cupola o~en, i~ led to the peripheral surface of a number of normally 4 fa~t rotat~g rotor~. Th0 rotors in pairs rotate in opposito direction~ thereby throwing the ~ain flow of melt from upper rotor to the next and ~o ~orth, until all of the melt lung away ~rom the rotors in form of fibres of melt. This proce~ nor~ally i8 designated as a cascade spinning proces~.
In ord~r to cool the fibres as well a~ transport the fibre~ to a co~veyor oa which the~ are collecte~ aDd transported to further processing into mats, ~lab~ ~tc., for thermal a~d acoustic insulation, a flow Or air i~ introduced along the p~riphery of the rotors ~rom air distributing means. In order to avoid acessi~e cooling of the flow of ~elt between the rotors~ ~o air i~ introduced ~nto the i~terspace bet~een the rotor~. The air i8 introduced approYimatelr parallel with th~
axi~ o~ the ~otors.
Product~ man~factured ~rom the mineral ~ool derived
In the manu~acture of mineral ~ool a flow of liquid melt at a temperature, which normally is in the area of 1000-1400C, produced by melting rock~ ~lag, glass-forming ra~-material~ and other inorganic materials ~n an oven, nor~ally a Cupola o~en, i~ led to the peripheral surface of a number of normally 4 fa~t rotat~g rotor~. Th0 rotors in pairs rotate in opposito direction~ thereby throwing the ~ain flow of melt from upper rotor to the next and ~o ~orth, until all of the melt lung away ~rom the rotors in form of fibres of melt. This proce~ nor~ally i8 designated as a cascade spinning proces~.
In ord~r to cool the fibres as well a~ transport the fibre~ to a co~veyor oa which the~ are collecte~ aDd transported to further processing into mats, ~lab~ ~tc., for thermal a~d acoustic insulation, a flow Or air i~ introduced along the p~riphery of the rotors ~rom air distributing means. In order to avoid acessi~e cooling of the flow of ~elt between the rotors~ ~o air i~ introduced ~nto the i~terspace bet~een the rotor~. The air i8 introduced approYimatelr parallel with th~
axi~ o~ the ~otors.
Product~ man~factured ~rom the mineral ~ool derived
-2-10790~9 from the above process sometimes have an unsatisfactory tensile strength, which may be a drawback for the finished products, being damaged during transport and mounting, but this lack of tensile strength may also be inconvenient in some of the finishing processes by which the wool is collected as a compar-atively thin layer on a first conveyor from which it is made up into a thicker web by means of an overlapping process. The low tensile strength is mostly found in products having a low specific weight, and has the consequence that a mineral wool product with a density of 20 kg/m3, being otherwise economically favourable, cannot be produced with a tensile strength which is sufficient for its handling during transport and installation.
The object of the present invention is to provide a method for the manufacture of a mineral wood from which products having an improved tensile strength may be produced.
It is believed that the comparatively low tensile strength of mineral wool from cascade spinning is due to the fact that the finished wool is built up from tufts of mineral fibre and not from uniformly distributed fibres. The tufts may have a size of a few centimetres, and often the tufts have a greater density than the average density of the mineral wool.
The number of fibres in the portions between the tufts, therefore, are too small to establish a sufficient and satis-factory coherence between the fibres in these portions which would prevent the mineral wool from being pulled apart during the normal handling.
According to studies of what happens in the area around a rotor in the cascade spinning process, the formation of tufts is due to the fact that during the spinning fibres form a coherent veil which to some extent is dragged with 1079(~69 the rotation of the rotor owing to its mechanical coherence with the melt adhering to the rotors. At the same time the veil to some degree is drawn out in the a~ial direction of the rotor until the veil is torn apart by the air flow into tufts comprising coherent, tangled tufts.
The method according to the invention is charac-terized in that the flow ofair is formed by partial flows being introduced side by side close to the outer contour `o~ each rotor, each partial flow having such a direction that the flow besides an axial velocity also has a tangen-tial velocity in the direction of movement of the rotor at the point of introduction of the partial flow.
Owing to the tangential velocity component in the air flow around each rotor, the veil of fibres will open before it is torn apart into tufts. This reduces the density of the tufts to such a level that substantially uniform mineral wool may be produced.
It has been proved that products from mineral wool obtain a tensile strength which is nearly the double of the tensile strength of products made according to the known proc:ess. The improved tensile strength is believed to be due to a more uniform fibre distribution in the mine-ral wool caused by the reduced density of the mineral fibre tufts.
The invention also relates to an apparatus for per-forming the method according to the invention: The apparatus comprises at least one fast rotating rotor having a flow of melt directed to its peripheral surface in such a way that the melt adheres to the surface or surfaces and is thrown therefrom in form of fibres being cooled and transported to collecting means by a flow of air being in-troduced into the area of the periphery of the rotors.
1079()69 The apparatus is characterized in that close ~ o~
to each rotor ~ at least part of its periphery is a ~ slot which is concentric with the rotor and in which are blades for forming partial air flows which besides an axial velocity component also have a tangential velo-city component corresponding with the direction of move-ment of the rotor at the point of introduction of the partial flow, the distance between the blades being such that the partial flows integrate with the cooling and transporting air flow.
The blades mày according to one embodiment be arranged on a flange at the periphery of each rotor, the flange forming one limitation of the slot, the other limitation being the walls of an air distribution chamber. This arrangement provides a good agreement in the tangential velocity and the rotational speed of the rotor. It is, however, also possible to mount the blades on the edge of the distribut-ing chamber, forming an angle with respect to the axis of the rotor. With this arrangement it is possible to vary the flo~ of air and its direction along the periphery of the rotor and e.g. reduce the flow of air in the interspace between the rotors in order to reduce the cooling effect on the flow of melt.
It is preferred to place a screen in the area into which the flow of melt is introduced in order to prevent excessive cooling of the melt before it is spun into fibres.
The invention is described in detail in the follow-; ing description with reference to the drawings in which fig. 1 is a perspective view of a spinning rotor showing the principle of the method according to the inven-tion, ,, ~ , . . .
1079~)69 fig. 2 is an axial section through a rotor and a distribution chamber in an arrangement in which the blades are mounted on the rotor, fig. 3 is a detail of a rotor and a distribution chamber in section with fixed blades in the air introduc-tion slot, and figs. 4 and 5 show sections along AA and BB in fig.
2 and 3 respectively.
Fig. 1 shows a rotor 1 rotating in the direction of the arrow O. A flow of liquid melt falls on the peri-pheral surface 10 of the rotor, whereby the melt adheres to the surface, and the melt is drawn with the rotor for some distance before it is thrown away from the rotor in form of fibres of melt. Along the peripheral surface of the rotor a sIot 11 is arranged concentric with the rotor and through which a flow of air is introduced for transport and cooling of the fibres. In the slot 11 blades are arranged providing the flow of air having an axial velocity component Va with a tangential component of velo-city Vt in the rotational direction of the rotor.
By introducing the cooling air in this way,the veil of fibres surrounding the rotor will open up before the fibres in form of tufts are transported to collecting means b~
in form of a perforated band from the lower face of which~
the~air is sucked away in order to deposit the fibres or tufts of fibres as a mat of mineral wool.
Fig. 2 shows an axial section through a rotor 1 which is mounted on a shaft 5, rotating in a bearing 6.The rotor comprises a rim with the peripheral surface 10 and flanges 2 and 3. The flanges and the rim are mounted by . . ' . , , .
' :
, ~079069 means of a nut 4 against an abutment 5a on the shaft. Along the periphery of the rim a slot 11 is provided ~etween a collar on the inner flange and a wall 7 of an air distri-buting chamber, surrounding the bearing 6. In the slot blades 8 are arranged on the edge of the collar. The blades 8 are substantially parallel with the axis of the rotor and provide~ the flow of air with an tangential velocity Vt owing to the rotation of the blades with the rotor.
Fig. 3 shows another embodiment of the means for introducing the cooling and the tra~portair. The slot 11 is arranged between flanges on the wall 7 of the air distri-bution chamber,and in the slot 11 are the blades 9 mounted forming an angle with the axis of the rotor.
Fig. 4 shows a section along AA in fig. 2. It is seen that the blades 8 are substantially parallel with the axis of the rotor, while fig. 5 showing a section along BB in fig. 3 shows that the blades 9 form an angle with respect to the axis of the rotor.
With the embodiment according to fig. 2 it is obtained that the tangential velocity of the air will correspond exactly to the velocity of the outer surface of the rotor. Furthermore, the housing for the bearing can be used as air distribution chamber, making this part of the apparatus easier to clean and maintain. The draw-back of this embodiment is that the unavoidable clearance between the tips of the blades may result in formation of an unintended turbulence in the air flow. The embodiment according to fig. 3 has not this drawback, and further makes a variation in the flowOf air along the slot possible, e . g . it is possible to reduce the flow of air at the point .
,, " , . . . . .
of introduction of the flow of melt in order to reduce the cooling effect at this point.
A heat insulating material containing a bonding agent and which is manufactured according to the new method has a density or specific weight of 29 kg/m3. Insulating material normally contains a bonding agent connecting the fibres at intersection points. The bonding agent in the insulating material is a phenolic resin making up 1,45% of the total weight of the material. The tensile strength of this insulating lQ material is 11,0 kN/m2. For comparison, an insulating material made according to a known cascade spinning process and having identical density and contents of bonding agent had a tensile strength of 6,3 kN/m2.
;
' ~ .
The object of the present invention is to provide a method for the manufacture of a mineral wood from which products having an improved tensile strength may be produced.
It is believed that the comparatively low tensile strength of mineral wool from cascade spinning is due to the fact that the finished wool is built up from tufts of mineral fibre and not from uniformly distributed fibres. The tufts may have a size of a few centimetres, and often the tufts have a greater density than the average density of the mineral wool.
The number of fibres in the portions between the tufts, therefore, are too small to establish a sufficient and satis-factory coherence between the fibres in these portions which would prevent the mineral wool from being pulled apart during the normal handling.
According to studies of what happens in the area around a rotor in the cascade spinning process, the formation of tufts is due to the fact that during the spinning fibres form a coherent veil which to some extent is dragged with 1079(~69 the rotation of the rotor owing to its mechanical coherence with the melt adhering to the rotors. At the same time the veil to some degree is drawn out in the a~ial direction of the rotor until the veil is torn apart by the air flow into tufts comprising coherent, tangled tufts.
The method according to the invention is charac-terized in that the flow ofair is formed by partial flows being introduced side by side close to the outer contour `o~ each rotor, each partial flow having such a direction that the flow besides an axial velocity also has a tangen-tial velocity in the direction of movement of the rotor at the point of introduction of the partial flow.
Owing to the tangential velocity component in the air flow around each rotor, the veil of fibres will open before it is torn apart into tufts. This reduces the density of the tufts to such a level that substantially uniform mineral wool may be produced.
It has been proved that products from mineral wool obtain a tensile strength which is nearly the double of the tensile strength of products made according to the known proc:ess. The improved tensile strength is believed to be due to a more uniform fibre distribution in the mine-ral wool caused by the reduced density of the mineral fibre tufts.
The invention also relates to an apparatus for per-forming the method according to the invention: The apparatus comprises at least one fast rotating rotor having a flow of melt directed to its peripheral surface in such a way that the melt adheres to the surface or surfaces and is thrown therefrom in form of fibres being cooled and transported to collecting means by a flow of air being in-troduced into the area of the periphery of the rotors.
1079()69 The apparatus is characterized in that close ~ o~
to each rotor ~ at least part of its periphery is a ~ slot which is concentric with the rotor and in which are blades for forming partial air flows which besides an axial velocity component also have a tangential velo-city component corresponding with the direction of move-ment of the rotor at the point of introduction of the partial flow, the distance between the blades being such that the partial flows integrate with the cooling and transporting air flow.
The blades mày according to one embodiment be arranged on a flange at the periphery of each rotor, the flange forming one limitation of the slot, the other limitation being the walls of an air distribution chamber. This arrangement provides a good agreement in the tangential velocity and the rotational speed of the rotor. It is, however, also possible to mount the blades on the edge of the distribut-ing chamber, forming an angle with respect to the axis of the rotor. With this arrangement it is possible to vary the flo~ of air and its direction along the periphery of the rotor and e.g. reduce the flow of air in the interspace between the rotors in order to reduce the cooling effect on the flow of melt.
It is preferred to place a screen in the area into which the flow of melt is introduced in order to prevent excessive cooling of the melt before it is spun into fibres.
The invention is described in detail in the follow-; ing description with reference to the drawings in which fig. 1 is a perspective view of a spinning rotor showing the principle of the method according to the inven-tion, ,, ~ , . . .
1079~)69 fig. 2 is an axial section through a rotor and a distribution chamber in an arrangement in which the blades are mounted on the rotor, fig. 3 is a detail of a rotor and a distribution chamber in section with fixed blades in the air introduc-tion slot, and figs. 4 and 5 show sections along AA and BB in fig.
2 and 3 respectively.
Fig. 1 shows a rotor 1 rotating in the direction of the arrow O. A flow of liquid melt falls on the peri-pheral surface 10 of the rotor, whereby the melt adheres to the surface, and the melt is drawn with the rotor for some distance before it is thrown away from the rotor in form of fibres of melt. Along the peripheral surface of the rotor a sIot 11 is arranged concentric with the rotor and through which a flow of air is introduced for transport and cooling of the fibres. In the slot 11 blades are arranged providing the flow of air having an axial velocity component Va with a tangential component of velo-city Vt in the rotational direction of the rotor.
By introducing the cooling air in this way,the veil of fibres surrounding the rotor will open up before the fibres in form of tufts are transported to collecting means b~
in form of a perforated band from the lower face of which~
the~air is sucked away in order to deposit the fibres or tufts of fibres as a mat of mineral wool.
Fig. 2 shows an axial section through a rotor 1 which is mounted on a shaft 5, rotating in a bearing 6.The rotor comprises a rim with the peripheral surface 10 and flanges 2 and 3. The flanges and the rim are mounted by . . ' . , , .
' :
, ~079069 means of a nut 4 against an abutment 5a on the shaft. Along the periphery of the rim a slot 11 is provided ~etween a collar on the inner flange and a wall 7 of an air distri-buting chamber, surrounding the bearing 6. In the slot blades 8 are arranged on the edge of the collar. The blades 8 are substantially parallel with the axis of the rotor and provide~ the flow of air with an tangential velocity Vt owing to the rotation of the blades with the rotor.
Fig. 3 shows another embodiment of the means for introducing the cooling and the tra~portair. The slot 11 is arranged between flanges on the wall 7 of the air distri-bution chamber,and in the slot 11 are the blades 9 mounted forming an angle with the axis of the rotor.
Fig. 4 shows a section along AA in fig. 2. It is seen that the blades 8 are substantially parallel with the axis of the rotor, while fig. 5 showing a section along BB in fig. 3 shows that the blades 9 form an angle with respect to the axis of the rotor.
With the embodiment according to fig. 2 it is obtained that the tangential velocity of the air will correspond exactly to the velocity of the outer surface of the rotor. Furthermore, the housing for the bearing can be used as air distribution chamber, making this part of the apparatus easier to clean and maintain. The draw-back of this embodiment is that the unavoidable clearance between the tips of the blades may result in formation of an unintended turbulence in the air flow. The embodiment according to fig. 3 has not this drawback, and further makes a variation in the flowOf air along the slot possible, e . g . it is possible to reduce the flow of air at the point .
,, " , . . . . .
of introduction of the flow of melt in order to reduce the cooling effect at this point.
A heat insulating material containing a bonding agent and which is manufactured according to the new method has a density or specific weight of 29 kg/m3. Insulating material normally contains a bonding agent connecting the fibres at intersection points. The bonding agent in the insulating material is a phenolic resin making up 1,45% of the total weight of the material. The tensile strength of this insulating lQ material is 11,0 kN/m2. For comparison, an insulating material made according to a known cascade spinning process and having identical density and contents of bonding agent had a tensile strength of 6,3 kN/m2.
;
' ~ .
Claims (3)
EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS
FOLLOWS:
1. In an apparatus for the manufacture of mineral wool which includes at least one high speed horizontally dis-posed cylindrical rotor, means for directing a flow of liquid melt onto the peripheral surfaces of said rotor during rotation thereof, and an air distribution chamber including means for directing an air flow axially of and along the contour of the rotor for cooling formed fibers and for trans-porting said fibers to collecting means; the improvement which comprises providing an annular slot adjacent to, concentric with and radially outwardly of the peripheral surface of each rotor, positioning a plurality of blades in said slot in sub-stantially parallel disposition with each other and with the axis of the rotor and mounted to be rotatable therewith, the blades being thus positioned to provide a series of air flows having axial velocity as well as tangential velocity in the rotational direction of the rotor at the points of introduction thereto equal to the peripheral velocity of the rotor, the distance between the blades being such that the series of air flows integrate to thereby form the cooling and transporting air flow.
2. Apparatus according to claim 1, including inner and outer flange members releasably connected to said rotor at the opposed axial ends thereof and adapted to secure said rotor to a horizontal rotatable drive shaft for rotation there-with, said blades being formed integrally with said inner flange member about the outer periphery thereof.
3. Apparatus according to claim 2, including bear-ing means for rotatably supporting the drive shaft, said air distribution chamber surrounding said bearing means and having a wall concentric with and radially outwardly of said inner flange member to define said slot therewith.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK391675A DK146297C (en) | 1975-09-01 | 1975-09-01 | METHOD AND APPARATUS FOR MINING WOOL MANUFACTURING |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1079069A true CA1079069A (en) | 1980-06-10 |
Family
ID=8128206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA260,070A Expired CA1079069A (en) | 1975-09-01 | 1976-08-27 | Method and apparatus for manufacture of mineral wool |
Country Status (18)
| Country | Link |
|---|---|
| JP (1) | JPS5231174A (en) |
| AT (1) | AT371082B (en) |
| BE (1) | BE845718A (en) |
| CA (1) | CA1079069A (en) |
| CH (1) | CH610871A5 (en) |
| CS (1) | CS209487B2 (en) |
| DE (1) | DE2638412C2 (en) |
| DK (1) | DK146297C (en) |
| FI (1) | FI60189C (en) |
| FR (1) | FR2322114A1 (en) |
| GB (1) | GB1559117A (en) |
| HU (1) | HU176316B (en) |
| IT (1) | IT1069695B (en) |
| NL (1) | NL179809C (en) |
| NO (1) | NO140419C (en) |
| PL (1) | PL104424B1 (en) |
| SE (1) | SE416295C (en) |
| YU (1) | YU39178B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59102830A (en) * | 1982-11-30 | 1984-06-14 | Nitto Boseki Co Ltd | Method for applying processing liquid to inorganic short fiber and apparatus therefor |
| DE3338081A1 (en) * | 1983-10-20 | 1985-05-02 | Glaswerk Schuller Gmbh, 6980 Wertheim | METHOD AND DEVICE FOR PRODUCING THIN GLASS FIBERS, CERAMIC FIBERS OR THE LIKE |
| DK608788A (en) * | 1988-11-01 | 1990-05-02 | Rockwool Int | PROCEDURE FOR MANUFACTURING A BINDING CONTAINER MINERAL WOOL PRODUCT |
| JPH0661191B2 (en) * | 1989-05-17 | 1994-08-17 | ニチアス株式会社 | Method for producing mat for paddy rice raising |
| FR2657077B1 (en) * | 1990-01-16 | 1993-07-02 | Saint Gobain Isover | METHOD AND DEVICE FOR FIBRATION OF MINERAL WOOL BY FREE CENTRIFUGATION. |
| YU159091A (en) * | 1990-09-28 | 1995-12-04 | Rockwool International A/S | PROCEDURE AND APPLIANCE FOR MINERAL WOOL FIBER MANUFACTURING |
| DE102008062810B3 (en) * | 2008-12-23 | 2010-07-01 | Saint-Gobain Isover G+H Ag | Manufacture of high-alumina mineral fibers, employs clay or clay minerals of given composition, to reduce melting point under oxidizing conditions |
| FI125457B (en) * | 2011-04-01 | 2015-10-15 | Paroc Group Oy | DEVICE AND PROCEDURE FOR GAS FLOW CONTROL IN MANUFACTURING MINERAL FIBER AND FIBER ARRANGEMENTS |
| US9012342B2 (en) | 2011-12-16 | 2015-04-21 | Rockwool International A/S | Melt composition for the production of man-made vitreous fibres |
| PL3309133T3 (en) | 2013-10-16 | 2019-10-31 | Rockwool Int | Man-made vitreous fibres |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL37551C (en) * | 1933-12-18 | |||
| DE1027374B (en) * | 1953-03-31 | 1958-04-03 | Hoeganaes Ab | Apparatus for the production of fibers from a thermosensitive material |
| US3233992A (en) * | 1959-05-01 | 1966-02-08 | Gustin Bacon Mfg Co | Apparatus for production of fine glass fibers |
| GB1016805A (en) * | 1962-11-25 | 1966-01-12 | Haim Schachter | Improvements in the production of mineral wool |
| US3785791A (en) * | 1972-03-02 | 1974-01-15 | W Perry | Forming unit for fine mineral fibers |
-
1975
- 1975-09-01 DK DK391675A patent/DK146297C/en active
-
1976
- 1976-04-13 SE SE7604304A patent/SE416295C/en unknown
- 1976-08-17 NO NO762839A patent/NO140419C/en unknown
- 1976-08-24 FI FI762414A patent/FI60189C/en not_active IP Right Cessation
- 1976-08-25 FR FR7625675A patent/FR2322114A1/en active Granted
- 1976-08-26 DE DE2638412A patent/DE2638412C2/en not_active Expired
- 1976-08-26 GB GB35463/76A patent/GB1559117A/en not_active Expired
- 1976-08-27 CA CA260,070A patent/CA1079069A/en not_active Expired
- 1976-08-31 CH CH1103176A patent/CH610871A5/en not_active IP Right Cessation
- 1976-08-31 BE BE170248A patent/BE845718A/en not_active IP Right Cessation
- 1976-08-31 CS CS765658A patent/CS209487B2/en unknown
- 1976-08-31 YU YU02122/76A patent/YU39178B/en unknown
- 1976-08-31 AT AT0645776A patent/AT371082B/en active
- 1976-08-31 IT IT69116/76A patent/IT1069695B/en active
- 1976-09-01 NL NLAANVRAGE7609744,A patent/NL179809C/en not_active IP Right Cessation
- 1976-09-01 HU HU76RO896A patent/HU176316B/en unknown
- 1976-09-01 JP JP51103763A patent/JPS5231174A/en active Pending
- 1976-09-01 PL PL1976192142A patent/PL104424B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| HU176316B (en) | 1981-01-28 |
| ATA645776A (en) | 1981-09-15 |
| BE845718A (en) | 1976-12-16 |
| GB1559117A (en) | 1980-01-16 |
| DK146297C (en) | 1984-02-13 |
| YU39178B (en) | 1984-08-31 |
| SE7604304L (en) | 1977-03-02 |
| FR2322114A1 (en) | 1977-03-25 |
| CS209487B2 (en) | 1981-12-31 |
| NO140419B (en) | 1979-05-21 |
| NL7609744A (en) | 1977-03-03 |
| YU212276A (en) | 1982-06-30 |
| NL179809B (en) | 1986-06-16 |
| DE2638412A1 (en) | 1977-03-10 |
| SE416295B (en) | 1980-12-15 |
| DK146297B (en) | 1983-08-29 |
| DE2638412C2 (en) | 1983-05-11 |
| PL104424B1 (en) | 1979-08-31 |
| AU1737776A (en) | 1978-03-09 |
| CH610871A5 (en) | 1979-05-15 |
| FR2322114B1 (en) | 1979-05-18 |
| NO762839L (en) | 1977-03-02 |
| JPS5231174A (en) | 1977-03-09 |
| FI60189B (en) | 1981-08-31 |
| SE416295C (en) | 1985-05-03 |
| DK391675A (en) | 1977-03-02 |
| FI762414A (en) | 1977-03-02 |
| IT1069695B (en) | 1985-03-25 |
| NO140419C (en) | 1979-08-29 |
| FI60189C (en) | 1983-02-14 |
| NL179809C (en) | 1986-11-17 |
| AT371082B (en) | 1983-05-25 |
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