SU1050580A3 - Machine for making non-woven net material from warp and weft threads - Google Patents
Machine for making non-woven net material from warp and weft threads Download PDFInfo
- Publication number
- SU1050580A3 SU1050580A3 SU731881276A SU1881276A SU1050580A3 SU 1050580 A3 SU1050580 A3 SU 1050580A3 SU 731881276 A SU731881276 A SU 731881276A SU 1881276 A SU1881276 A SU 1881276A SU 1050580 A3 SU1050580 A3 SU 1050580A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- threads
- cutting
- warp
- netting
- warp threads
- Prior art date
Links
Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/04—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
- D04H3/045—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles for net manufacturing
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/07—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments otherwise than in a plane, e.g. in a tubular way
- D04H3/073—Hollow cylinder shaped
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/12—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with filaments or yarns secured together by chemical or thermo-activatable bonding agents, e.g. adhesives, applied or incorporated in liquid or solid form
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
- D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
- D06H7/04—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials longitudinally
- D06H7/08—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials longitudinally for cutting tubular fabric longitudinally
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Fiber Materials (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
елate
оabout
СЛSL
XX
Изобретение относитс к установке дл изготовлени сетчатого нетканого материала из нитей основы и утка, соединенных в точках пересечени .The invention relates to an apparatus for making a mesh nonwoven material from warp and weft threads connected at intersection points.
Известна установка, содержсица станину с опорой, имеющей круглое поперечное сечение дл образовани сетчатого полотна в виде цилиндричекой трубы, средство дл направлени нитей, приспособление дл продольно резки материала на два полотна, т нульные валики дл перемещени материала , средство дл направлени материала , содержгицее валики.A known installation, comprising a frame with a support having a circular cross section for forming a mesh cloth in the form of a cylindrical tube, means for directing the threads, a device for cutting material longitudinally into two webs, pull rollers for moving the material, means for directing the material, rollers containing the material.
Получаемый матери;ал сформирован в виде сетки, имеющей пр моугольные чейки. Дл предотвращени искажени формы чеек при разрезании материал на два полотна требуютс средства перемещени полотна в том же направлении , что и при образовании, сетки в виде цилиндрической трубы с одновременным раст гиванием в стороны и перемещением центральной . части сетки в осевом направлении.Obtained by the mother; al formed in the form of a grid having rectangular cells. To prevent the shape of the cells from distorting when cutting the material into two webs, means for moving the web in the same direction as when forming the grid in the form of a cylindrical tube with simultaneous stretching to the sides and moving the central one are required. parts of the grid in the axial direction.
Однако такие приемы обработки заставл ют увеличивать габариты установки . ..However, such processing techniques cause the installation to increase in size. ..
Цель изобретени -, получение сетчатого материала с пр моугольной формой чеек.The purpose of the invention is to obtain a mesh material with a rectangular cell shape.
Поставленна цель достигаетс тем, что средство дл направлени материала выполнено в-виде пары дугообразных элементов, расположенных симметрично по обе стороны от приспособлени дл резки материала и закрепленных Нс. его уровне, каждый элемент с обеих сторон имеет угловые стойки, соедин ющие его со станинрй, и ст жки, закрепленные одним концом в месте соединени угловых стоек и дугообразного элемента , а другим - на станине, при этом угловые стойки и ст жки снабжены регул торами длины, а каждый дугообразный элемент наклонен вперед по ходу перемещени полотна, и его центральна точка максимально удалена от плоскости расположени приспособлени дл резки материала, при этом оси соответствующей пары т нульных валиков расположены ниже дугообразного элемента,This goal is achieved by the fact that the means for guiding the material is made in the form of a pair of arcuate elements arranged symmetrically on both sides of the device for cutting the material and fixed Hc. on its level, each element on both sides has corner posts connecting it with staninry and straps fixed at one end at the junction of the corner posts and arcuate element, and the other on the bed, while the corner stands and straps are fitted with adjusters length, and each arcuate element is tilted forward along the movement of the web, and its central point is as far as possible from the plane of the arrangement of the device for cutting material, while the axes of the corresponding pair of zero rollers are located below the arc-shaped el ement
Кроме того, кажда углова стойка (Знабжена поддерживающей ст жкой, закрепленной одним концом на станине и имеющей регул тор длины.In addition, each corner stand (Signed by a supporting tie, fixed at one end to the frame and having a length adjuster.
Каждое сетчатое полотно, образуемое после резки, подводитс к месту намотки по дугообразному элементу с одновременным выравниванием и развертыванием сетки в- плоскости. Во врем вырав.нивани сетка следует в направлении от оси цилиндрической опоры, что дает возможность уменьшить размеры установки.Each mesh fabric formed after cutting is guided to the winding point along the arcuate element with simultaneous alignment and deployment of the grid in the plane. During the alignment, the mesh should be in the direction from the axis of the cylindrical support, which makes it possible to reduce the size of the installation.
На фиг. 1 дана установка, вид спереди; на фиг. 2 - то же, вид сбоку .FIG. 1 given installation, front view; in fig. 2 - the same, side view.
Установка имеет станину, включающую основание 1 и св занные с ним опоры 2 и 3, соединенные в верхней части поперечными и .продольными балками 4 и 5.The installation has a frame comprising a base 1 and the supports 2 and 3 connected with it, connected in the upper part by transverse and longitudinal beams 4 and 5.
В центральной части к балкам 4 подвешены четыре колонны 6, несущие круглую опору 7, состо щую из плиты 8 и кольцевого злемента с нагревательньми и изол ционным средствами 9 и 10. Над кольцом установлено охлаждающее средство 11 с вентил торами 12. Над средством 11 может бы1ь устанолен дополнительный охлаждающий элемент 13.In the central part, four columns 6 are suspended from the beams 4, carrying a circular support 7 consisting of a plate 8 and an annular element with heating and insulating means 9 and 10. A cooling means 11 with fans 12 is installed above the ring. installed additional cooling element 13.
К нижней стороне плиты- 8 прикреплены два концентрических направл ющих кольца 14 и15 с радиальными прорез ми дл направлени нитей 16 основы, которые подаютс с неподвиж ных бqбин (не изображены). Нити основы направл ютс через гибкие трубки 17, собранные в секции зажиМами 18и 19, равномерно распределенные по окружности направл ющих колец 14 и 15.Two concentric guide rings 14 and 15 with radial slots are attached to the bottom side of the plate 8 for guiding the warp threads 16, which are supplied from stationary bqbin (not shown). The warp threads are guided through flexible tubes 17 assembled in section by clamps 18 and 19 uniformly distributed around the circumference of the guide rings 14 and 15.
Нити 20 и 21 утка подаютс через направл ющие 22 и 23, которые через шарнирные муфты 24 св заны с концами . вращающегос полого стержн 25, установленного в опорах соосно с опорой 7. Стержень 25 приводитс во вращение от вала электродвигател 26 через шкив 27. На стержне укреплен спаренный нитеводитель 28, выполненный в виде двух полых плачей, отход щих от стержн в противоположных направлени х, внутрь которых направл ютс нити утка, обвивающие нити основы с образованием сетчатого материала трубчатой формы с пр моугольными- чейками, размеры которых завис т от соотношени между скоростьюпродвижени нитей основы и окружно- . стью вращени нитеводителей нитей утка. Нити основы и утка могут быть соединены между собой в точках nepe-i сечени любым известным способом.The weft yarns 20 and 21 are fed through the guides 22 and 23, which are connected to the ends through the hinged couplings 24. rotating hollow rod 25 installed in bearings coaxially with support 7. Rod 25 is rotated from the shaft of the electric motor 26 through the pulley 27. On the rod, a paired yarn feeder 28 is made, made in the form of two hollow weeping, extending from the rod in opposite directions, inside which weft yarns are wound, wrapping around the warp yarns to form a tubular mesh material with rectangular cells, the dimensions of which depend on the ratio between the speed of the warp threads and the circumferential. rotation of yarn thread yarns. The warp and weft threads can be interconnected at cross section nepe-i points by any known method.
Дл резки материала, например, на два плоских полотна, служат приспособлени .29, которые в этом случае установлены с двух сторон материала и выполн.ены в виде нагреваемых режущих элементов, вставленных между нит ми основы и разрезающих нити утка при движении материала. Приспособлени дл резки материала укреплены на кронштейнах 30, смонтироранных при помощи стоек 31 на горизонтальных балках 32.For cutting material, for example, into two flat webs, are the devices .29, which in this case are installed on both sides of the material and are made in the form of heated cutting elements inserted between the warp threads and the weft cutting threads as the material moves. Devices for cutting material mounted on brackets 30, mounted using racks 31 on horizontal beams 32.
Средство дл направлени разрезанного материала выполнено в виде пары дугообразных элементов 33, располо5 женных симметрично по обе стороны от приспособлени 29 дл резки материала и закрепленных на его уровне. Каждый дугообразный элемент 33 с двух сторон имеет угловые стойки 34, соедин ющие его с опорами 2 и 3 станины , и ст жки 35, закрепленные одни концом в месте соединени угловых стоек 34 и дугообразного элемента, а другим - на опорах станины. Угловы стойки 34 и ст жки 35 снабжены регул торами 36 длины, а кажда углова стойка снабжена поддерживающей ст жкой 37, закрепленной одним концом на опоре станины и имеющей регул тор длины. . Кроме того, угловые стойки 34 соединены с дугообразньюад элементами 33 с помощью раст жек 38, Ниже дугообразных элементов установлены два изогнутых валика 39, ;вободно вращающихс на ос х 40, при помощи карданных шарниров 41 смонтированы концами на опорах станиг ны. Валики 39 служат дл выравнивани сетчатого материала, перемещаемого по дугообразным элементам. Под каждым валиком 39 установлены т нущие валики 42 и 43, приводимые во вращение в противоположные стороны и служащие дл перемещени проходимого между ними материала. Далее расположены направл ющие и приемные валики 44 и 45. Формируемый сетчатый материал в виде трубчатого рукава разрезаетс приспособлением 29 на два плоских полотна, каждое из которых подаетс вверх и наружу на соответствующий дугообразный элемент 33, по которым полотна перемещаютс к валикгик 39. При этом крайние зоны материала, составл ющие, примерно, одну треть общей ширины полотна, проход т по угловым стойкам 34. Путем подбора соответствующей крив, визны упом нутых средств достигают равенства путей, проходимых нит ми сновы от зоны резки до вали- . ов 42,43, что обеспечивает сохраение формы чеек сетки.The means for guiding the cut material is made in the form of a pair of arcuate elements 33 arranged symmetrically on both sides of the tool 29 for cutting the material and fixed at its level. Each arcuate element 33 on both sides has corner posts 34 connecting it with supports 2 and 3 of the frame, and straps 35 fixed at one end at the junction of corner posts 34 and the arc-shaped element, and the other on the supports of the frame. The corners of the uprights 34 and of the stitches 35 are provided with length adjusters 36, and each corner uprights are provided with a support 37, fixed at one end on the bed support and having a length adjuster. . In addition, corner posts 34 are connected to arcuate elements 33 by means of extensions 38, Two curved rollers 39 are installed below the arcuate elements; freely rotating on the axes 40, using cardan joints 41 are mounted with ends on the supports. The rollers 39 serve to align the mesh material moving along the arcuate elements. Under each roller 39, pull rollers 42 and 43 are installed, rotated in opposite directions and serving to move material passed between them. Next, the guide and take-up rollers 44 and 45 are arranged. The formed mesh material in the form of a tubular sleeve is cut by the device 29 into two flat webs, each of which is fed upwards and outwards to the corresponding arcuate element 33, along which the webs move to the roller 39. zones of the material, constituting approximately one third of the total width of the web, pass along corner posts 34. By selecting the appropriate curve, the vises of the above means achieve equality of the paths traveled by the threads again from the cut zone and to vali-. 42,43, which ensures the preservation of the shape of the grid cells.
«м"M
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK57872AA DK129170B (en) | 1972-02-09 | 1972-02-09 | Machine for making a non-woven fabric consisting of cross-linked warp threads and cross-threads. |
Publications (1)
Publication Number | Publication Date |
---|---|
SU1050580A3 true SU1050580A3 (en) | 1983-10-23 |
Family
ID=8095150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU731881276A SU1050580A3 (en) | 1972-02-09 | 1973-02-08 | Machine for making non-woven net material from warp and weft threads |
Country Status (20)
Country | Link |
---|---|
US (1) | US3855036A (en) |
JP (1) | JPS565858B2 (en) |
AT (1) | AT338738B (en) |
AU (1) | AU468542B2 (en) |
BE (1) | BE795178A (en) |
BR (1) | BR7300960D0 (en) |
CA (1) | CA983367A (en) |
CH (1) | CH551521A (en) |
CS (1) | CS159719B2 (en) |
DD (1) | DD102419A5 (en) |
DE (1) | DE2304365C2 (en) |
DK (1) | DK129170B (en) |
FR (1) | FR2171309B1 (en) |
GB (1) | GB1416937A (en) |
HK (1) | HK67276A (en) |
IT (1) | IT978937B (en) |
NL (1) | NL171180C (en) |
NO (1) | NO130402B (en) |
SE (1) | SE379380B (en) |
SU (1) | SU1050580A3 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS519067B2 (en) * | 1973-11-29 | 1976-03-23 | ||
US4211807A (en) * | 1975-08-08 | 1980-07-08 | Polymer Processing Research Institute Ltd. | Reinforced non-woven fabrics and method of making same |
WO1980002850A1 (en) * | 1979-06-13 | 1980-12-24 | T Honda | Device and procedure for manufacturing tubular cloths |
US4481065A (en) * | 1981-11-19 | 1984-11-06 | H. B. Fuller Company | Network reinforcing forming apparatus |
US4481055A (en) * | 1981-11-19 | 1984-11-06 | H. B. Fuller Company | Method of forming reinforcing network |
US4481054A (en) * | 1981-11-19 | 1984-11-06 | H. B. Fuller Company | Method of forming reinforcing network |
JPS58180658A (en) * | 1982-04-12 | 1983-10-22 | 倉敷紡績株式会社 | Apparatus for producing nonwoven base fabric for composite molding |
JPH03102656U (en) * | 1990-02-08 | 1991-10-25 | ||
AU765624B2 (en) * | 1999-01-12 | 2003-09-25 | Hunter Douglas Industries Bv | Nonwoven fabric and method and apparatus for manufacturing same |
CN107541854B (en) * | 2017-10-11 | 2019-05-10 | 肇庆中特能科技投资有限公司 | Multistation grid wrap-up |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL96482C (en) * | 1949-11-23 | 1900-01-01 | ||
BE497519A (en) * | 1950-04-25 | |||
US3391043A (en) * | 1963-05-20 | 1968-07-02 | Orcon Corp | Method and apparatus for making non-woven fabrics |
DK105423C (en) * | 1963-09-23 | 1966-09-26 | Gustav William Bilgrav Borup | Method for manufacturing wire mesh. |
US3342664A (en) * | 1964-06-15 | 1967-09-19 | Monsanto Co | Apparatus for producing nonwoven fabric |
GB1141823A (en) * | 1966-05-12 | 1969-02-05 | Inst Khim Fiz | Apparatus for producing nonwoven materials |
FR1543642A (en) * | 1966-10-31 | 1968-10-25 | Orcom Corp | Method and apparatus for making nonwoven fabrics |
DK136082B (en) * | 1969-10-08 | 1977-08-08 | Erik Soelbeck | Method and apparatus for making nets and other non-woven articles of intersecting longitudinal and transverse threads. |
DE2112906A1 (en) * | 1970-03-20 | 1971-10-07 | Fibertex As | Unwoven textile goods as well as the method and system for manufacturing the goods |
US3686050A (en) * | 1970-07-17 | 1972-08-22 | Kimberly Clark Co | Method and apparatus for making seamless cross-bias reinforced tissue-fiber laminates |
-
0
- BE BE795178D patent/BE795178A/en not_active IP Right Cessation
-
1972
- 1972-02-09 DK DK57872AA patent/DK129170B/en not_active IP Right Cessation
-
1973
- 1973-01-29 CA CA162,293A patent/CA983367A/en not_active Expired
- 1973-01-30 DE DE2304365A patent/DE2304365C2/en not_active Expired
- 1973-02-01 DD DD168602A patent/DD102419A5/xx unknown
- 1973-02-01 US US00328589A patent/US3855036A/en not_active Expired - Lifetime
- 1973-02-02 AT AT92673A patent/AT338738B/en not_active IP Right Cessation
- 1973-02-06 SE SE7301619A patent/SE379380B/xx unknown
- 1973-02-07 CS CS883A patent/CS159719B2/cs unknown
- 1973-02-07 NL NLAANVRAGE7301680,A patent/NL171180C/en not_active IP Right Cessation
- 1973-02-08 AU AU51964/73A patent/AU468542B2/en not_active Expired
- 1973-02-08 BR BR73960A patent/BR7300960D0/en unknown
- 1973-02-08 SU SU731881276A patent/SU1050580A3/en active
- 1973-02-08 IT IT20184/73A patent/IT978937B/en active
- 1973-02-08 NO NO00502/73A patent/NO130402B/no unknown
- 1973-02-08 FR FR7304501A patent/FR2171309B1/fr not_active Expired
- 1973-02-08 JP JP1598873A patent/JPS565858B2/ja not_active Expired
- 1973-02-08 CH CH184173A patent/CH551521A/en not_active IP Right Cessation
- 1973-02-09 GB GB660973A patent/GB1416937A/en not_active Expired
-
1976
- 1976-10-28 HK HK672/76*UA patent/HK67276A/en unknown
Also Published As
Publication number | Publication date |
---|---|
IT978937B (en) | 1974-09-20 |
BE795178A (en) | 1973-05-29 |
DK129170B (en) | 1974-09-02 |
HK67276A (en) | 1976-11-05 |
DD102419A5 (en) | 1973-12-12 |
DK129170C (en) | 1975-02-10 |
NL7301680A (en) | 1973-08-13 |
NL171180B (en) | 1982-09-16 |
AU468542B2 (en) | 1976-01-15 |
CH551521A (en) | 1974-07-15 |
BR7300960D0 (en) | 1973-09-20 |
DE2304365C2 (en) | 1982-11-04 |
AU5196473A (en) | 1974-08-08 |
ATA92673A (en) | 1977-01-15 |
GB1416937A (en) | 1975-12-10 |
NO130402B (en) | 1974-08-26 |
DE2304365A1 (en) | 1973-08-16 |
JPS565858B2 (en) | 1981-02-07 |
US3855036A (en) | 1974-12-17 |
JPS4891376A (en) | 1973-11-28 |
SE379380B (en) | 1975-10-06 |
FR2171309A1 (en) | 1973-09-21 |
FR2171309B1 (en) | 1977-04-22 |
NL171180C (en) | 1983-02-16 |
AT338738B (en) | 1977-09-12 |
CS159719B2 (en) | 1975-01-31 |
CA983367A (en) | 1976-02-10 |
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