CA1042861A - Disintegrator - Google Patents
DisintegratorInfo
- Publication number
- CA1042861A CA1042861A CA203,994A CA203994A CA1042861A CA 1042861 A CA1042861 A CA 1042861A CA 203994 A CA203994 A CA 203994A CA 1042861 A CA1042861 A CA 1042861A
- Authority
- CA
- Canada
- Prior art keywords
- working tools
- disintegrator
- tools
- fan blades
- circular series
- 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
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/20—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors
- B02C13/205—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors arranged concentrically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/288—Ventilating, or influencing air circulation
Abstract
DISINTEGRATOR
Abstract of the Disclosure A disintegrator comprising two motor-driven rotors which rotate in opposite senses in a housing, each of the two rotors carrying at least one circular series of working tools for treating material, said circular series of working tools of said rotors being concentric, at least one of said circular series of working tools being provided with fan blades, said fan blades extending within the circular series of said working tools, each of said fan blades being disposed between two of said working tools.
Abstract of the Disclosure A disintegrator comprising two motor-driven rotors which rotate in opposite senses in a housing, each of the two rotors carrying at least one circular series of working tools for treating material, said circular series of working tools of said rotors being concentric, at least one of said circular series of working tools being provided with fan blades, said fan blades extending within the circular series of said working tools, each of said fan blades being disposed between two of said working tools.
Description
This invention relates to a disintegrator comprising a housing including at least one pair of oppositely disposed rotors arranged therein to rotate in opposite directions about a common axis of rotation, each of the opposing rotor faces carrying tools for treating material, for example comminuting, activating or mixing.
The invention aims at providing an advantageous con struction of the rotors such than an outwardly directed radial air stream is obtained which stream provides the material with a path from the inside to the outside. In addition, the invention also aims at using the material to be treated for forming, in operation, a protective coating on the tools.
Backgroun_ of the Invention In known disintegrators the rotors are provided only with beating tools, such as rods, pins, metal plates, blades, or the like, and the formation of an air stream for discharging the material, the degree of disintegrating and the formation of the protective layer depend on the form, helix angle, and peripheral velocity of said tools. With known rotors of this kind, the afore-mentioned aims cannot be accomplished or can be accomplished onlyin part. The most frequent disadvantages are an inadequate working of the material and an incomplete formation of the protective layer.
The Published German Specification (Auslegeschrift) 1,296,943 of June 4, 1969 discloses a disintegrator which has a working means consisting of two oppositely rotatable rotors, which carry concentric circular series of blades, which serve ~, as beating tools and have working surfaces which become covered during operation with a protective layer of the material to be treated.
The rotors describea in the afore-mentioned publication have a serious disadvantage, which resides in that such rotors cannot be used in disintegrators if the blades serving as beating - A
.. ~ . . ... . . . . .. . . .
1~)42~61 tools have a helix angle,~ of 1~ss thah 15 . If the blades have a helix angle~ of less than 15~, the material to be fed into the disintegrator will be thrown back from the feed opening because the stream of the gaseous fluid, such as air, which is produced by the rotors opposes the stream of the particles of --the material to be fed into the disintegrator. According to the afore-mentioned publication, a helix angle between 20 and is recommended for the formation of a protective layer of the material to be treated. Finally, said publication also proposes to provide the blades with a concave working surface.
None of these measures has proved, in operation, to be satis-factory as far as the above-mentioned aims of the invention are concerned.
Accordingly, the present invention provides a dis-integrator having two motor-driven rotors which rotate in opposite senses in a housing, each of the two rotors carrying at least one circular series of working tools for treating material, said circular series of working tools of said rotors being concentric, at least one of said circular series of working tools being provided with fan blades, said fan blades extending within the circular series of said working tools, each of said fan blades being disposed between two of said working tools.
Further details of the invention will be explained more fully with reference to the accompanying drawings which show diagrammatically a disintegrator and various designs and arrangements of working tools and fan blades. In diagrammatic views:
Fig. 1 is a longitudina} sectional view on a plane extending along the axis of rotation of a disintegrator according to a special embodiment of the invention;
Fig. 2 is a sectional view taken on line II-II in Fig. 1, the houslng and parts thereof being omitted for the sake of simplicity; and Figs. 3 to 5 each show part of rotor face ring or
The invention aims at providing an advantageous con struction of the rotors such than an outwardly directed radial air stream is obtained which stream provides the material with a path from the inside to the outside. In addition, the invention also aims at using the material to be treated for forming, in operation, a protective coating on the tools.
Backgroun_ of the Invention In known disintegrators the rotors are provided only with beating tools, such as rods, pins, metal plates, blades, or the like, and the formation of an air stream for discharging the material, the degree of disintegrating and the formation of the protective layer depend on the form, helix angle, and peripheral velocity of said tools. With known rotors of this kind, the afore-mentioned aims cannot be accomplished or can be accomplished onlyin part. The most frequent disadvantages are an inadequate working of the material and an incomplete formation of the protective layer.
The Published German Specification (Auslegeschrift) 1,296,943 of June 4, 1969 discloses a disintegrator which has a working means consisting of two oppositely rotatable rotors, which carry concentric circular series of blades, which serve ~, as beating tools and have working surfaces which become covered during operation with a protective layer of the material to be treated.
The rotors describea in the afore-mentioned publication have a serious disadvantage, which resides in that such rotors cannot be used in disintegrators if the blades serving as beating - A
.. ~ . . ... . . . . .. . . .
1~)42~61 tools have a helix angle,~ of 1~ss thah 15 . If the blades have a helix angle~ of less than 15~, the material to be fed into the disintegrator will be thrown back from the feed opening because the stream of the gaseous fluid, such as air, which is produced by the rotors opposes the stream of the particles of --the material to be fed into the disintegrator. According to the afore-mentioned publication, a helix angle between 20 and is recommended for the formation of a protective layer of the material to be treated. Finally, said publication also proposes to provide the blades with a concave working surface.
None of these measures has proved, in operation, to be satis-factory as far as the above-mentioned aims of the invention are concerned.
Accordingly, the present invention provides a dis-integrator having two motor-driven rotors which rotate in opposite senses in a housing, each of the two rotors carrying at least one circular series of working tools for treating material, said circular series of working tools of said rotors being concentric, at least one of said circular series of working tools being provided with fan blades, said fan blades extending within the circular series of said working tools, each of said fan blades being disposed between two of said working tools.
Further details of the invention will be explained more fully with reference to the accompanying drawings which show diagrammatically a disintegrator and various designs and arrangements of working tools and fan blades. In diagrammatic views:
Fig. 1 is a longitudina} sectional view on a plane extending along the axis of rotation of a disintegrator according to a special embodiment of the invention;
Fig. 2 is a sectional view taken on line II-II in Fig. 1, the houslng and parts thereof being omitted for the sake of simplicity; and Figs. 3 to 5 each show part of rotor face ring or
- 2 -' .. .... .. . - - . ~.... . . -16)4~861 rings with different designs and arrangements of tools and fab blades.
The disintegrator shown in Fig. 1 is similar in structure to the disintegrator disclosed in applicant's Canadian Patent No. 983,455, issued February 10, 1976. It consists also of a housing 10, in which two oppositely rotating rotors 1, 2 are mounted. One rotor 1 is driven by the shaft lA in the direction of the arrow A and the other rotor 2 is driven by the shaft 2A in the opposite direction B.
The material to be treated is worked upon by working tools 6, which form three concentric circular series 3, 4, 5 and may consist of blades serving as beating and/or mixing tools. In the present case the working tools of the outermost circular series 5 and of the innermost circular series 3 are carried by -the rotor 1 and the working tools ~f the intervening circular series 4 are carried by the rotor 2. For this purpose the blades of each circular series are gripped between two parallel rings - 3A, 3B or 4A, 4B or 5A, 5B. The rings 3A and 5A are carried by a disc lB of rotor 1 and the ring 4B is carried by a disc 2B of rotor 2.
The form, arrangement and number of the working tools arranged in concentric circular series and their provision on oppositely rotating rotors may be different from the above, e.g., ;~
in accordance with the above-mentioned Canadian Patent No. 983,455.
In the simplest embodiment, shown in Fig. 2, the -~ -blades consist of flat plates. Alternatively they may be concave or, as shown in Fig~. 3 to 5, angled. The base plat~ 7 of this beating blade has a helix angle d, which is measured outwardly from a place 71 extending peripherally at the leading edge of the blade (tangential plcme). -In angled beating tools, the angled portion 6' or 6" ~--i~ shorter than the remaining portion 6~' and amounts preferably -to one-half or less of the overall length of the beating tools consisting of a blade or plate. The shorter portion 6' or 6" -....
ls inclined from portion 6'n toward the center of the rotor.
~\' ,.. .
~ 3 ~ ~ -~
- ~()4Z861 As is apparent from Fig. 3, the angled end portions 6', 6" may be provided at both ends of portion 6"' or, in accordance with the embodiment of Fig. 5, only at one end thereof, in the present case preferably at the trailing end. They are preferably made of or coated with cermet and are replaceably mounted. Finally, as is shown in Fig. 3, the outer edges of portions 6', 6", which outer edges face the axis of the motor, may be covered with protective strips 10. Instead of blades it is possible to use pins, bolts or different working tools. Depending on the working program, different combinations of the described beating or working tools can be used.
Fan blades 8 are pn~nded between the working tools or at that end of each working tool of the outermost circular series 5 which is the leading end when the rotor 1 is rotating. Like the working tools 6, the fan blades 8 are gripped between the rings which carry them and may have any desired shape, e.g., of a plate, finger, or the like. They serve to ensure that the material to be treated flows in an outward direction and also to form a protective layer of the material to be treated on that surface of the beating tools which faces the rotor axis. This protective layer should be formed regardless of the helix angle . The same may be less than 15 for certain operations whereas a larger angle, e.g., of 20-30 , may be more desirable for other operations.
The fan blades 8 may be disposed within the outer circular series 5 of tools, as i8 shown in Fig. 2, or may protrude outwardly, as is shown in Fig. 4. They extend suitably radially and preferably include an angle of 90 with the plane of the beating tool. Further advantages may be afforded by the use of fan blades extending beyond the inner edge of the beating tool, particularly if the latter consists of a blade or plate. An example of such design is shown in Fig. 5. It will be understood that, within the scope of the invention, different positions and arrangements of the fan blades and different angles thereof A _ 4 _ ., . -. - . . - , . . ~ . : . . . ~
1042~61 relative to the beating tools may be selected. For instance, the above~mentioned preferred angular position relative to the angled portion 6' or 6" of the beating tool may be employed.
The length 1 of the fan blades 8 is selected so that the stream of gaseous fluid, which stream is generated by said blades, has an intensity which is sufficient to overcome the oppositely directed stream produced by the beating tools 6.
This ensures a normal action of the rotors so that the particles of material fed into the central portion of the rotors impinge on the beating tools 6 which are covered with a protective layer of the material to be treated and the stream of the gaseous fluid promotes the discharge of the particles.
The change of the length 1 of the fan blades 8 results in a change of the granulometric composition of the activated material. This enables the selection of an optimally suitable granulometric composition for definite technological requirements.
Because the use of fan blades 8 permits also the use of beating tools having a helix angle~ below 15 , stronger and more durable protective layers will be formed on the beating tools, partic- ~ -ularly in the treatment of wet mixtures, than with the known rotors.
For the sake of clearness the housing 10 is shown in the present case as a simple box having end walls 11, 12, a ~ -peripheral wall 13 and a feed pipe 14 for feeding the material to be treated into the central portion of the working chamber ~;
enclosed by the housing. The housing 10 may have any desired, suitable shape. For instance, the housing may be designed as ;-described in the above-mentioned Canadian Patent No. 983,455. ~
A 8tationary housing may also be used, of course. -It will be understood that various other structural .. ... .
changes may be adopted within the course of the invention.
For instance, the working tools may comprise means for ~ . .... ~
cutting various materials, such as plastics materials, fibers, '.:-' .
' .
.- i, : - , . ~ .. . . . .
- 1~42861 composite materials, rubber or other tough materials and for this purpose may be provided with cutting edges.
This is particularly possible with pinlike beating tools.
The fan means may not only be used in conjunction with baffle plates but also in conjunction with pinlike beating tools. Pinlike working tools are particularly important and of advantage for grinding cereals or cement clinker, and all soft materials which cannot by themselves form a sufficiently hard protective layer on the plates are desirably treated with pinlike working tools. The number of circular series on the oppositely rotating rotors and the sequence of said circular series may be selected as desired. Besides, fan blades may be provided on the inner circular series.
. .
: .
- 6 - ~
The disintegrator shown in Fig. 1 is similar in structure to the disintegrator disclosed in applicant's Canadian Patent No. 983,455, issued February 10, 1976. It consists also of a housing 10, in which two oppositely rotating rotors 1, 2 are mounted. One rotor 1 is driven by the shaft lA in the direction of the arrow A and the other rotor 2 is driven by the shaft 2A in the opposite direction B.
The material to be treated is worked upon by working tools 6, which form three concentric circular series 3, 4, 5 and may consist of blades serving as beating and/or mixing tools. In the present case the working tools of the outermost circular series 5 and of the innermost circular series 3 are carried by -the rotor 1 and the working tools ~f the intervening circular series 4 are carried by the rotor 2. For this purpose the blades of each circular series are gripped between two parallel rings - 3A, 3B or 4A, 4B or 5A, 5B. The rings 3A and 5A are carried by a disc lB of rotor 1 and the ring 4B is carried by a disc 2B of rotor 2.
The form, arrangement and number of the working tools arranged in concentric circular series and their provision on oppositely rotating rotors may be different from the above, e.g., ;~
in accordance with the above-mentioned Canadian Patent No. 983,455.
In the simplest embodiment, shown in Fig. 2, the -~ -blades consist of flat plates. Alternatively they may be concave or, as shown in Fig~. 3 to 5, angled. The base plat~ 7 of this beating blade has a helix angle d, which is measured outwardly from a place 71 extending peripherally at the leading edge of the blade (tangential plcme). -In angled beating tools, the angled portion 6' or 6" ~--i~ shorter than the remaining portion 6~' and amounts preferably -to one-half or less of the overall length of the beating tools consisting of a blade or plate. The shorter portion 6' or 6" -....
ls inclined from portion 6'n toward the center of the rotor.
~\' ,.. .
~ 3 ~ ~ -~
- ~()4Z861 As is apparent from Fig. 3, the angled end portions 6', 6" may be provided at both ends of portion 6"' or, in accordance with the embodiment of Fig. 5, only at one end thereof, in the present case preferably at the trailing end. They are preferably made of or coated with cermet and are replaceably mounted. Finally, as is shown in Fig. 3, the outer edges of portions 6', 6", which outer edges face the axis of the motor, may be covered with protective strips 10. Instead of blades it is possible to use pins, bolts or different working tools. Depending on the working program, different combinations of the described beating or working tools can be used.
Fan blades 8 are pn~nded between the working tools or at that end of each working tool of the outermost circular series 5 which is the leading end when the rotor 1 is rotating. Like the working tools 6, the fan blades 8 are gripped between the rings which carry them and may have any desired shape, e.g., of a plate, finger, or the like. They serve to ensure that the material to be treated flows in an outward direction and also to form a protective layer of the material to be treated on that surface of the beating tools which faces the rotor axis. This protective layer should be formed regardless of the helix angle . The same may be less than 15 for certain operations whereas a larger angle, e.g., of 20-30 , may be more desirable for other operations.
The fan blades 8 may be disposed within the outer circular series 5 of tools, as i8 shown in Fig. 2, or may protrude outwardly, as is shown in Fig. 4. They extend suitably radially and preferably include an angle of 90 with the plane of the beating tool. Further advantages may be afforded by the use of fan blades extending beyond the inner edge of the beating tool, particularly if the latter consists of a blade or plate. An example of such design is shown in Fig. 5. It will be understood that, within the scope of the invention, different positions and arrangements of the fan blades and different angles thereof A _ 4 _ ., . -. - . . - , . . ~ . : . . . ~
1042~61 relative to the beating tools may be selected. For instance, the above~mentioned preferred angular position relative to the angled portion 6' or 6" of the beating tool may be employed.
The length 1 of the fan blades 8 is selected so that the stream of gaseous fluid, which stream is generated by said blades, has an intensity which is sufficient to overcome the oppositely directed stream produced by the beating tools 6.
This ensures a normal action of the rotors so that the particles of material fed into the central portion of the rotors impinge on the beating tools 6 which are covered with a protective layer of the material to be treated and the stream of the gaseous fluid promotes the discharge of the particles.
The change of the length 1 of the fan blades 8 results in a change of the granulometric composition of the activated material. This enables the selection of an optimally suitable granulometric composition for definite technological requirements.
Because the use of fan blades 8 permits also the use of beating tools having a helix angle~ below 15 , stronger and more durable protective layers will be formed on the beating tools, partic- ~ -ularly in the treatment of wet mixtures, than with the known rotors.
For the sake of clearness the housing 10 is shown in the present case as a simple box having end walls 11, 12, a ~ -peripheral wall 13 and a feed pipe 14 for feeding the material to be treated into the central portion of the working chamber ~;
enclosed by the housing. The housing 10 may have any desired, suitable shape. For instance, the housing may be designed as ;-described in the above-mentioned Canadian Patent No. 983,455. ~
A 8tationary housing may also be used, of course. -It will be understood that various other structural .. ... .
changes may be adopted within the course of the invention.
For instance, the working tools may comprise means for ~ . .... ~
cutting various materials, such as plastics materials, fibers, '.:-' .
' .
.- i, : - , . ~ .. . . . .
- 1~42861 composite materials, rubber or other tough materials and for this purpose may be provided with cutting edges.
This is particularly possible with pinlike beating tools.
The fan means may not only be used in conjunction with baffle plates but also in conjunction with pinlike beating tools. Pinlike working tools are particularly important and of advantage for grinding cereals or cement clinker, and all soft materials which cannot by themselves form a sufficiently hard protective layer on the plates are desirably treated with pinlike working tools. The number of circular series on the oppositely rotating rotors and the sequence of said circular series may be selected as desired. Besides, fan blades may be provided on the inner circular series.
. .
: .
- 6 - ~
Claims (9)
1. A disintegrator comprising two motor-driven rotors which rotate in opposite senses in a housing, each of the two rotors carrying at least one circular series of work-ing tools for treating material, said circular series of working tools of said rotors being concentric, at least one of said circular series of working tools being provided with fan blades, said fan blades extending within the circular series of said working tools, each of said fan blades being disposed between two of said working tools.
2. A disintegrator as set forth in claim 1, characterized in that the fan blades (8) protrude outwardly from the outermost circular series (5) of working tools on the rotors.
3. A disintegrator as set forth in claim 1, characterized in that the fan blades (8) include an angle of about 90° with the base plane of the working tools.
4. A disintegrator as set forth in claim 1, characterized in that the fan blades (8) adjoin the leading end of the working tool (6), which is inclined to the radial direction, and the fan blades are inclined opposite to the direction of movement of the working tools.
5. A disintegrator as set forth in claim 4, characterized in that the working tools are inclined to the radial direction and the fan blades protrude beyond the work-ing tools toward the rotor shaft and are inclined opposite to the direction of movement of the working tools.
6. A disintegrator as set forth in claim 1, characterized in that said working tools have at least one end portion which is angled toward the rotor shaft.
7. A disintegrator as set forth in claim 6, characterized in that the angled portions of the working tools consist of cermet or are provided with a coating of metal or plastics material.
8. A disintegrator as set forth in claim 6, characterized in that the angled portions are replaceable.
9. A disintegrator as set forth in claim 1, characterized in that at least some of the working tools are provided with a cutting edge to serve as cutting tools.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT592273A AT325396B (en) | 1973-07-05 | 1973-07-05 | DISINTEGRATOR |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1042861A true CA1042861A (en) | 1978-11-21 |
Family
ID=3581037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA203,994A Expired CA1042861A (en) | 1973-07-05 | 1974-07-04 | Disintegrator |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US3894695A (en) |
| JP (1) | JPS5049765A (en) |
| AT (1) | AT325396B (en) |
| BE (1) | BE817280A (en) |
| CA (1) | CA1042861A (en) |
| CH (1) | CH590691A5 (en) |
| DE (1) | DE2431387C2 (en) |
| FR (1) | FR2235736B1 (en) |
| GB (1) | GB1474550A (en) |
| IL (1) | IL45143A (en) |
| IT (1) | IT1031018B (en) |
| NL (1) | NL185002C (en) |
| SE (1) | SE408376B (en) |
| YU (1) | YU36875B (en) |
| ZA (1) | ZA744321B (en) |
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| SU1310022A1 (en) * | 1983-11-25 | 1987-05-15 | Таллинский Политехнический Институт | Laboratory disintegrator set-up |
| SU1306595A1 (en) * | 1983-12-05 | 1987-04-30 | Таллинский Политехнический Институт | Disintegrator |
| SU1287362A1 (en) * | 1984-04-23 | 1987-11-15 | Специальное Конструкторско-Технологическое Бюро "Дезинтегратор" Республиканского Объединения "Эстколхозстрой" | Disintegrator |
| JPS6223449A (en) * | 1985-07-22 | 1987-01-31 | 株式会社 躍進機械製作所 | Pulverizer |
| JPS6223448A (en) * | 1985-07-22 | 1987-01-31 | 株式会社 躍進機械製作所 | Pulverizer |
| DE3802260A1 (en) * | 1988-01-27 | 1989-08-10 | Kasa Technoplan | ROTATING DISINTEGRATION DEVICE |
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| WO2020181385A1 (en) | 2019-03-14 | 2020-09-17 | Dean Mayerle | Weed seed destruction |
| AU2021235800A1 (en) * | 2020-03-12 | 2022-09-08 | Tritana Intellectual Property Ltd. | Weed seed destruction |
| CN112791823B (en) * | 2020-12-17 | 2022-03-04 | 山东山铝环境新材料有限公司 | Novel grinding device for dry-process cement production |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29512C (en) * | Firma nagel & kaemp in Hamburg | Arrangement of fan blades on striking pin disks | ||
| GB191274A (en) * | 1921-12-24 | 1923-01-11 | Henry Nelson Oswald | Improvements to grinding or disintegrating machines |
| US2338373A (en) * | 1938-06-04 | 1944-01-04 | Aurig Max | Disintegratorlike device |
| US3331905A (en) * | 1964-01-24 | 1967-07-18 | Hint Iohannes Alexandrovich | Method of treating particulate material |
| NL6606502A (en) * | 1965-05-29 | 1966-11-30 | ||
| US3549093A (en) * | 1967-04-27 | 1970-12-22 | Pallmann W | Comminuting machine for comminuting chippable material,especially wood,into chips of predetermined size |
-
1973
- 1973-07-05 AT AT592273A patent/AT325396B/en not_active IP Right Cessation
-
1974
- 1974-06-28 IL IL45143A patent/IL45143A/en unknown
- 1974-06-28 NL NLAANVRAGE7408812,A patent/NL185002C/en not_active IP Right Cessation
- 1974-06-28 CH CH896474A patent/CH590691A5/xx not_active IP Right Cessation
- 1974-06-29 DE DE2431387A patent/DE2431387C2/en not_active Expired
- 1974-07-02 YU YU1853/74A patent/YU36875B/en unknown
- 1974-07-03 JP JP49075495A patent/JPS5049765A/ja active Pending
- 1974-07-03 SE SE7408748A patent/SE408376B/en not_active IP Right Cessation
- 1974-07-03 FR FR7423185A patent/FR2235736B1/fr not_active Expired
- 1974-07-03 US US485494A patent/US3894695A/en not_active Expired - Lifetime
- 1974-07-04 IT IT24797/74A patent/IT1031018B/en active
- 1974-07-04 ZA ZA00744321A patent/ZA744321B/en unknown
- 1974-07-04 CA CA203,994A patent/CA1042861A/en not_active Expired
- 1974-07-05 GB GB2993174A patent/GB1474550A/en not_active Expired
- 1974-07-05 BE BE2053731A patent/BE817280A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2235736B1 (en) | 1978-06-02 |
| GB1474550A (en) | 1977-05-25 |
| YU36875B (en) | 1984-08-31 |
| IT1031018B (en) | 1979-04-30 |
| DE2431387C2 (en) | 1986-02-20 |
| NL7408812A (en) | 1975-01-07 |
| JPS5049765A (en) | 1975-05-02 |
| NL185002C (en) | 1990-01-02 |
| IL45143A0 (en) | 1974-09-10 |
| IL45143A (en) | 1976-05-31 |
| FR2235736A1 (en) | 1975-01-31 |
| DE2431387A1 (en) | 1975-01-23 |
| SE7408748L (en) | 1975-01-06 |
| US3894695A (en) | 1975-07-15 |
| CH590691A5 (en) | 1977-08-15 |
| NL185002B (en) | 1989-08-01 |
| ZA744321B (en) | 1975-08-27 |
| AT325396B (en) | 1975-10-27 |
| BE817280A (en) | 1974-11-04 |
| SE408376B (en) | 1979-06-11 |
| YU185374A (en) | 1982-06-18 |
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