EP0288358A1 - Method and apparatus for improving the flax separation into fibres - Google Patents

Method and apparatus for improving the flax separation into fibres Download PDF

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Publication number
EP0288358A1
EP0288358A1 EP88400886A EP88400886A EP0288358A1 EP 0288358 A1 EP0288358 A1 EP 0288358A1 EP 88400886 A EP88400886 A EP 88400886A EP 88400886 A EP88400886 A EP 88400886A EP 0288358 A1 EP0288358 A1 EP 0288358A1
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EP
European Patent Office
Prior art keywords
cylinders
pair
flax
fibers
linen
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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.)
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EP88400886A
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German (de)
French (fr)
Inventor
Pierre Staelen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TEILLAGE de la VALLEE de la TRIE CAHON-GOUY
Institut Textile de France
Original Assignee
TEILLAGE de la VALLEE de la TRIE CAHON-GOUY
Institut Textile de France
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Application filed by TEILLAGE de la VALLEE de la TRIE CAHON-GOUY, Institut Textile de France filed Critical TEILLAGE de la VALLEE de la TRIE CAHON-GOUY
Publication of EP0288358A1 publication Critical patent/EP0288358A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01B—MECHANICAL TREATMENT OF NATURAL FIBROUS OR FILAMENTARY MATERIAL TO OBTAIN FIBRES OF FILAMENTS, e.g. FOR SPINNING
    • D01B1/00—Mechanical separation of fibres from plant material, e.g. seeds, leaves, stalks
    • D01B1/10—Separating vegetable fibres from stalks or leaves
    • D01B1/14—Breaking or scutching, e.g. of flax; Decorticating
    • D01B1/22—Breaking or scutching, e.g. of flax; Decorticating with crushing or breaking rollers or plates

Definitions

  • the present invention relates to the preparation of textile flax and more particularly to a process intended to improve the divisibility of flax into fibers compared to what is obtained by conventional spinning circuits.
  • the fibers are arranged in bundles of elementary fibers at the periphery of the rod between the bark and the wood.
  • the thirty to forty elementary fibers per bundle are associated with each other by organic cements (pectin, hemicellulose, lignin ).
  • the flax yarns, after preparation and spinning, are in fact made up not of elementary fibers but of what are commonly called technical fibers.
  • These technical fibers are assemblies of elementary fibers, owing to the fact that the cements were not completely eliminated during the various phases of the transformation making it possible to pass from the technical rod of flax to the finished yarn: retting, scutching, and all mechanical operations (combing, doubling, etc.) prior to spinning and aimed at obtaining a wick of fibers capable of being spun on a ring continuous, either dry or wet.
  • the use of linen can be envisaged in the long fiber spinning circuit of the wool type.
  • the scutched linen is transformed in a long strand comber which perfects the action of scutching by eliminating the impurities, by parallelizing the fibers and by refining them.
  • the shortest fibers are eliminated, these are the combs.
  • the combing yield is around 65%.
  • Dyed linen has a fineness and a length such that it can be worked after cracking on material like combed wool, however the additional combing which it undergoes again eliminates at least 15% of fibers. If this is technically possible, the use of dyed then combed and cracked linen on materials of the combed wool type has not so far proven to be economical, and in particular when seeking to obtain a suitable wick of fibers to be spun in the wet.
  • This process is of the known type in that it consists in crushing the flax in continuous movement by a succession of pressure means, as is usual in the mechanical operation of scutching flax stalks according to the patent. FR-A-1,009,391 or in the dehulling of the stems of green plants according to patent FR-A-1,053,851.
  • the process of the invention consists in crushing the fibers of a linen which has already been dyed beforehand, while said fibers being almost free from impurities are in the form of an approximately regular sheet of fibers. parallelized, so as to crack the organic cements without damaging the unit fibers.
  • part of the organic cements which bind, in the dyed flax, the bundles of unit fibers is weakened and is then easily eliminated in the subsequent operations of the transformation of flax into yarn, which leads to a more divided linen, having greater fineness, compared to a dyed linen which has not undergone the treatment of the invention.
  • the action of the pressure means on the dyed linen sheet must be sufficient for the organic cements to be effectively crushed, cracked, separated from the unit fibers. However, it should not be too large to the point of damaging the unit fibers themselves; which would make the linen thus treated infilable.
  • the flax fibers dyed appear in the form of a regular sheet and free of impurities, otherwise the action on organic cements would not be homogeneous, and the yarn obtained would have poor characteristics. If the ply is irregular in number of fibers, the action of the pressure means is greater on the parts comprising a large number of fibers, resulting in possible breakage of the unit fibers; on the other hand, on the parts comprising a smaller number of fibers, the action may be insufficient to crack the organic cements and improve the divisibility of the flax.
  • the dyed flax fibers are in the form of a ribbon weighing between 30 and 60 grams per meter and having a width of 40 to 100 millimeters; and the crushing is obtained by the action of a succession of four to ten pressure means each exerting a force, transverse to the ribbon, of between 140 and 1100 N per centimeter of ribbon.
  • the device according to the invention also comprises means for presenting the sheet of fibers in front of the pair of input cylinders.
  • the presentation means may in particular be capable of putting the sheet under tension so as to promote the parallelization of the fibers constituting the sheet.
  • the means of displacement of the cylinders of a given pair, perpendicular to the plane of tangency comprise, mounted on the two bearings supporting the axis of rotation of one of the two cylinders of said pair, two pneumatic cylinders whose stroke varies between a first position where the two cylinders of the pair are spaced and a second position where the first cylinder exerts on the second press.
  • the displacement means comprise means for adjusting the second position of the cylinder stroke.
  • the means for moving a pair of cylinders can be completely mechanical. They include for example: . a compression spring, one end of which is fixed to the bearing in which the axis of rotation of one of the cylinders of the pair rotates and the other end of which is fixed to a movable plate, . a threaded rod, one end of which has a flywheel and the other is secured to the movable plate, . a fixed plate, mounted on a frame, pierced with a recess whose inner surface has a threaded profile, and through which recess passes the threaded rod. These different elements are arranged so that the operator can vary the pressure exerted between the two cylinders of the pair by turning the hand wheel in one direction or the other.
  • the rotation of the handwheel causes the threaded rod to move relative to the fixed plate and consequently the movable plate secured to the threaded rod.
  • the movement of the movable plate causes that of the spring and the compression thereof when this movement tends to bring the two cylinders closer.
  • the movable plate is accompanied by a finger placed opposite a graduated scale mounted on the frame: the operator can thus identify, depending on the rotation of the steering wheel, the pressure exerted between the two cylinders.
  • the device according to the invention comprises from four to ten pairs of cylinders, of smooth surface, and the displacement means exert a force between the cylinders of each pair of between 140 and 1100 N per centimeter of ribbon.
  • Ribbon 1 of dyed linen measures approximately 30 g / m. It comes from a linen type comber but whose number of combs has been reduced and whose score has been reduced compared to the usual comber.
  • the ribbon 1 obtained in this way has good regularity, satisfactory cleanliness, the fibers are parallelized, but however the action of the combs has not been as great, the fibers are less divided than in a usual combed ribbon.
  • the performance of the combing machine in this new configuration is significantly higher than the traditional performance of the combing machine, since it is of the order of 80% compared to 65%. The quantity of combing tows which are by-products is reduced accordingly.
  • the ribbon 1 is presented flat in a fitting comprising three rolls 2,3,4 mounted free in rotation, with parallel axes.
  • the ribbon 1 passes over the roller 2, below the roller 3, above the roller 4, the roller 3 being below the plane passing through the axes of rotation of the rollers 2 and 4.
  • the strip 1 passes successively between seven pairs of cylinders with axes parallel to the rollers 2, 3 and 4, the tangent lines of which are in the same plane (A, A ⁇ ), said plane being itself same tangent to the rollers 2 and 4 at the upper part of their periphery. All cylinders rotate at the same speed.
  • the axes of rotation 15 of the cylinders are equipped with pinions 6 of gear comprising the same number of teeth. All the cylinders 5 situated above the tangency plane have their pinions 6 connected by a chain drive 7 between them and a pinion 8 driven by a motor 9.
  • all the cylinders 10 situated below the plane of tangency have their pinions 11 connected by a drive chain 12 between them and to a pinion 13 driven by a motor 14. Motors 9 and 14 drive their respective pinions 8 and 13 at the same speed.
  • the axis 15 of rotation of a cylinder is mounted at each end on a bearing 16.
  • This bearing slides between two slides 17 and 18 constituting the support frame of a pair of cylinders 5 and 6, the bearing 19 being fixed on the built.
  • the jack 20 is fixed on the upper upright 21; the end of the rod 22 of the jack 20 is fixed on the bearing 16 corresponding to the cylinder 5.
  • the jack is in two positions: the first, rod extended as shown in FIG. 2, for which the two cylinders 5 and 10 are applied one against the other with a force of 500 N per cm; the second, retracted rod, for which the two cylinders 5 and 10 are spaced from each other, allowing the introduction of the tape or the cleaning of the cylinders.
  • Each cylinder is made of metal, with a smooth surface, length 75 centimeters, diameter 25 centimeters, and weighs 140 kg.
  • the ribbon I passes through the tying system which places it flat and gives it a certain tension when it then passes between the first cylinders 5 and 10.
  • the ribbon 1 has a width of the order of 5 centimeters.
  • a plurality of ribbons can be passed over the device; in this case, one can add guide means on the path of the ribbons between each pair of cylinders to prevent the fibers of a ribbon from becoming entangled with the fibers of the ribbon which is adjacent to it.
  • the dyed linen ribbon after being crushed between the 7 pairs of cylinders, is then transformed, after passing through a doubler and cracking, on the preparation material of the combed wool type: first pass on intersecting, combing (on comber wool type and not linen combing) followed by three or four passes on intersecting, then passage on a bench with pins.
  • the lock obtained can be spun directly in the case of dry spinning or after degumming in the case of spinning in the dry. wet.
  • the same ribbon having undergone the same preparation but after having been previously treated in accordance with the invention on the crushing device with seven pairs of cylinders, had an index of 36.38%, and therefore an all-round finesse. perfectly acceptable for wet spinning and dry spinning.
  • the jack 20 is replaced on a set of purely mechanical means, allowing manual adjustment of the pressure between the cylinders 5 and 10.
  • This set includes a compression spring 23 placed between the two slides 17 and 18, above the bearing 16.
  • One end 23a of the spring 23 is fixed to the upper part of the bearing 16.
  • the other end 23b is fixed to a plate movable vertically in the slides 17 and 18 , comprising a bearing 25 in which the rod 26 can freely rotate.
  • the upper part 21 of the frame has a recess 27 whose inner surface has a threaded profile.
  • the rod 26 is a threaded rod, it passes through the recess 27 and ends with a flywheel 28.
  • the movable plate 24 is equipped with a finger 29 and on the upright of the slide 17, opposite the finger 29, a graduated scale 30 is placed.
  • the operator turns the flywheel 28 in the clockwise.
  • the threaded rod 26 descends through the recess 27, causing the plate 24 and the compression of the spring 23 against the bearing 16.
  • the position of the finger 29 on the graduated scale 30 gives the indication of the compression of the spring and therefore the pressure exerted by the cylinder 5 on the cylinder 10.
  • the device is equipped with fourteen adjustment points as above, placed above the bearings 16 of the two ends of each cylinder 5 .
  • the invention is not limited to the embodiment and to the example described above.
  • This choice must be driven by the criteria of the invention, namely that the organic cements are cracked without the unitary fibers themselves being damaged.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

A uniform sheet (1) of prescutched flax is crushed after making the fibres parallel while removing impurities, by being passed through a succession of pressing means, for example seven pairs (5, 10) of smooth rolls exerting, transversely to the sheet, a pressure of between 140 and 1100 N per centimetre of sheet. The crushing is such that it disintegrates certain cements without damaging the unit fibres. <IMAGE>

Description

La présente invention concerne la préparation du lin textile et plus particulièrement un procédé destiné à améliorer la divisibilité du lin en fibres par rapport à ce qui est obtenu par les circuits classiques de la filature.The present invention relates to the preparation of textile flax and more particularly to a process intended to improve the divisibility of flax into fibers compared to what is obtained by conventional spinning circuits.

Dans la tige technique du lin, les fibres sont disposées en faisceaux de fibres élémentaires à la périphérie de la tige entre l'écorce et le bois. Les trente à quarante fibres élémentaires par faisceau sont associées entre elles par des ciments organiques (pectine, hémicellulose, lignine...). Les fils de lin, après préparation et filature , sont en fait constitués non de fibres élémentaires mais de ce que l'on appelle communément les fibres techniques. Ces fibres techniques sont des assemblages de fibres élémentaires, du fait que les ciments n'ont pas été complétement éliminés au cours des différentes phases de la transformation permettant de passer de la tige technique de lin jusqu'au fil terminé : rouissage, teillage , et toutes les opérations mécaniques (peignage, doublage...) préalables à la filature et ayant pour but d'obtenir une mèche de fibres apte à être filée sur un continu à anneau, soit au sec, soit au mouillé.In the technical rod of flax, the fibers are arranged in bundles of elementary fibers at the periphery of the rod between the bark and the wood. The thirty to forty elementary fibers per bundle are associated with each other by organic cements (pectin, hemicellulose, lignin ...). The flax yarns, after preparation and spinning, are in fact made up not of elementary fibers but of what are commonly called technical fibers. These technical fibers are assemblies of elementary fibers, owing to the fact that the cements were not completely eliminated during the various phases of the transformation making it possible to pass from the technical rod of flax to the finished yarn: retting, scutching, and all mechanical operations (combing, doubling, etc.) prior to spinning and aimed at obtaining a wick of fibers capable of being spun on a ring continuous, either dry or wet.

Cette structure propre au lin a conduit à la mise en place de circuits de transformation spécifiques, différents de ceux existant dans la filature de fibres courtes telles que le coton, ou dans la filature de fibres longues telles que la laine. Les matériels de transformation du lin sont de manière générale beaucoup moins productifs et plus rustiques que ceux des autres circuits de filature. Un filateur de coton ou de laine ne dispose pas de ces matériels et ne peut pas réaliser sur ses lignes de production un fil de lin.This structure specific to linen has led to the establishment of specific processing circuits, different from those existing in the spinning of short fibers such as cotton, or in the spinning of long fibers such as wool. Linen processing equipment is generally much less productive and more rustic than that of other spinning circuits. A cotton or wool spinner does not have these materials and cannot make a linen thread on its production lines.

Les producteurs de lin ainsi que les filateurs des circuits coton et laine ont cherché à diversifier l'utilisation de la fibre de lin. Une solution décrite dans le journal l'Industrie Textile N°1097 de 1980 consiste à affiner mécaniquement les fibres de lin après teillage, de manière à ce qu'elles soient transformables dans le circuit des fibres courtes. Cet affinage est obtenu par coupage du lin teillé et passage dans des machines d'ouvraison dans lesquelles les aiguilles montées sur des cylindres à rotation très rapides pénètrent dans le lin et s'attaquent aux fibres techniques. Le lin affiné obtenu n'est filable dans le circuit coton qu'en mélange avec d'autres fibres.
Il n'est pas techniquement possible d'obtenir de la sorte un fil de lin pur.The flax producers as well as the spinners of the cotton and wool circuits have sought to diversify the use of flax fiber. A solution described in the journal Textile Industry No. 1097 of 1980 consists in refining mechanically flax fibers after scutching, so that they can be transformed in the short fiber circuit. This refinement is obtained by cutting the dyed flax and passing through working machines in which the needles mounted on very fast rotating cylinders penetrate the flax and attack the technical fibers. The refined linen obtained can only be spun in the cotton circuit in a mixture with other fibers.
It is not technically possible to obtain a pure linen thread in this way.

De même l'utilisation de lin peut être envisagée dans le circuit de la filature fibres longues type laine. Le lin teillé est transformé dans une peigneuse long brin qui parfait l'action du teillage en éliminant les impuretés, en parallélisant les fibres et en les affinant. Dans cette opération de peignage, les fibres les plus courtes sont éliminées , ce sont les étoupes de peignage. Le rendement du peignage est de l'ordre de 65 %. Le lin teillé a une finesse et une longueur telles qu'il peut être travaillé après craquage sur matériel type laine peignée, cependant le peignage complémentaire qu'il y subit élimine de nouveau au moins 15 % de fibres. Si cela est techniquement possible, l'utilisation du lin teillé puis peigné et craqué sur des matériels du type laine peignée ne s'est pas avérée jusqu'à présent économique, et en particulier lorsque l'on cherche à obtenir une mèche de fibres apte à être filée au mouillé.Similarly, the use of linen can be envisaged in the long fiber spinning circuit of the wool type. The scutched linen is transformed in a long strand comber which perfects the action of scutching by eliminating the impurities, by parallelizing the fibers and by refining them. In this combing operation, the shortest fibers are eliminated, these are the combs. The combing yield is around 65%. Dyed linen has a fineness and a length such that it can be worked after cracking on material like combed wool, however the additional combing which it undergoes again eliminates at least 15% of fibers. If this is technically possible, the use of dyed then combed and cracked linen on materials of the combed wool type has not so far proven to be economical, and in particular when seeking to obtain a suitable wick of fibers to be spun in the wet.

Or on a trouvé et c'est ce qui fait l'objet de l'invention, un procédé de traitement du lin qui améliore la divisibilité du lin, qui le rend apte à être transformé par un circuit mettant en oeuvre des machines du type laine peignée tout en conduisant à la réalisation d'une mèche de fibres filable au mouillè , et ceci dans des conditions économiquement acceptables.Now we have found and this is what is the subject of the invention, a process for treating linen which improves the divisibility of linen, which makes it suitable for being transformed by a circuit using machines of the wool type. combed while leading to the production of a wick of fibers spinnable in the wet, and this under economically acceptable conditions.

Ce procédé est du type connu en ce qu'il consiste à écraser le lin en déplacement continu par une succession de moyens de pression, comme cela est habituel dans l'opération mécanique de teillage des tiges de lin selon le brevet FR-A-1.009.391 ou dans le décorticage des tiges de plantes vertes selon le brevet FR-A-1.053.851. De manière caractéristique, le procédé de l'invention consiste à écraser les fibres d'un lin ayant déjà été préalablement teillé ,alors que lesdites fibres étant à peu près exemptes d'impuretés se présentent sous la forme d'une nappe approximativement régulière de fibres parallélisées, en sorte de fissurer les ciments organiques sans endommager les fibres unitaires.This process is of the known type in that it consists in crushing the flax in continuous movement by a succession of pressure means, as is usual in the mechanical operation of scutching flax stalks according to the patent. FR-A-1,009,391 or in the dehulling of the stems of green plants according to patent FR-A-1,053,851. Typically, the process of the invention consists in crushing the fibers of a linen which has already been dyed beforehand, while said fibers being almost free from impurities are in the form of an approximately regular sheet of fibers. parallelized, so as to crack the organic cements without damaging the unit fibers.

Ainsi grâce au procédé de l'invention, une partie des ciments organiques qui lient, dans le lin teillé, les faisceaux de fibres unitaires est fragilisée et est ensuite facilement éliminée dans les opérations ultérieures de la transformation du lin en fil, ce qui conduit à un lin plus divisé, présentant une plus grande finesse, par rapport à un lin teillé n'ayant pas subi le traitement de l'invention.Thus, thanks to the process of the invention, part of the organic cements which bind, in the dyed flax, the bundles of unit fibers is weakened and is then easily eliminated in the subsequent operations of the transformation of flax into yarn, which leads to a more divided linen, having greater fineness, compared to a dyed linen which has not undergone the treatment of the invention.

L'action des moyens de pression sur la nappe de lin teillé doit être suffisante pour que les ciments organiques soient effectivement écrasés, fissurés, désolidarisés par rapport aux fibres unitaires. Toutefois, elle ne doit pas être trop importante au point d'endommager les fibres unitaires elles-mêmes ; ce qui rendrait infilable le lin ainsi traité.The action of the pressure means on the dyed linen sheet must be sufficient for the organic cements to be effectively crushed, cracked, separated from the unit fibers. However, it should not be too large to the point of damaging the unit fibers themselves; which would make the linen thus treated infilable.

De plus, il est indispensable que lors de l'action des moyens de pression les fibres de lin teillé se présentent sous la forme d'une nappe régulière et exempte d'impuretés, faute de quoi l'action sur les ciments organiques ne serait pas homogène , et le fil obtenu présenterait de médiocres caractéristiques. Si la nappe est irrégulière en nombre de fibres, l'action des moyens de pression est plus importante sur les parties comportant un grand nombre de fibres, entraînant une éventuelle rupture des fibres unitaires ; par contre sur les parties comportant un plus petit nombre de fibres, l'action peut être insuffisante pour fissurer les ciments organiques et améliorer la divisibilité du lin.On a constaté que la fissuration, conduisant à la désolidarisation des ciments organiques compris entre les fibres unitaires, n'est valablement obtenue que par une action progressive sur la nappe de fibres et donc par une succession de moyens de pression. L'action d'un seul moyen exerçant une pression plus forte ne conduit pas au résultat recherché, mais risque d'endommager les fibres unitaires. On pense expliquer le phénomène constaté par le fait qu'entre les moyens de pression successifs, la nappe de fibres se déplace en continu et que les fibres de lin et les ciments n'ont pas la même disposition d'un moyen de pression à l'autre.In addition, it is essential that during the action of the means of pressure the flax fibers dyed appear in the form of a regular sheet and free of impurities, otherwise the action on organic cements would not be homogeneous, and the yarn obtained would have poor characteristics. If the ply is irregular in number of fibers, the action of the pressure means is greater on the parts comprising a large number of fibers, resulting in possible breakage of the unit fibers; on the other hand, on the parts comprising a smaller number of fibers, the action may be insufficient to crack the organic cements and improve the divisibility of the flax. It has been observed that cracking, leading to the separation of the organic cements comprised between the unit fibers , is only validly obtained by a progressive action on the water table fibers and therefore by a succession of pressure means. The action of a single means exerting a stronger pressure does not lead to the desired result, but risks damaging the unitary fibers. It is thought to explain the phenomenon observed by the fact that between the successive pressurized means, the sheet of fibers moves continuously and that the flax fibers and the cements do not have the same arrangement of a pressurized medium. 'other.

Préférentiellement, les fibres de lin teillé se présentent sous la forme d'un ruban pesant entre 30 et 60 grammes au mètre et ayant une largeur de 40 à 100 millimètres ; et l'écrasement est obtenu par l'action d'une succession de quatre à dix moyens de pression exergant chacun une force, transversalement au ruban, comprise entre 140 et 1100 N au centimètre de ruban.Preferably, the dyed flax fibers are in the form of a ribbon weighing between 30 and 60 grams per meter and having a width of 40 to 100 millimeters; and the crushing is obtained by the action of a succession of four to ten pressure means each exerting a force, transverse to the ribbon, of between 140 and 1100 N per centimeter of ribbon.

C'est un autre objet de l'invention que de proposer un dispositif spécialement conçu pour mettre en oeuvre le procédé précité. Ce dispositif comprend :

  • a) une succession de paires de cylindres, tangents deux à deux suivant un même plan ,
  • b) des moyens d'entraînement en rotation des paires de cylindres, un cylindre d'une paire donnée étant entraîné en rotation dans le sens opposé à celui de l'autre cylindre, tous les cylindres situés d'un même côté du plan de tangence étant entraînés dans le même sens , et tous les cylindres ayant la même vitesse tangentielle,
  • c) des moyens de déplacement des cylindres perpendiculairement au plan de tangence, permettant d'une part l'introduction de la nappe de lin teillé entre chaque paire de cylindres et d'autre part de régler la pression exercée entre les cylindres d'une paire donnée.
It is another object of the invention to provide a device specially designed to implement the above method. This device includes:
  • a) a succession of pairs of cylinders, tangent two by two along the same plane,
  • b) means for driving the pairs of cylinders in rotation, a cylinder of a given pair being rotated in the opposite direction to that of the other cylinder, all the cylinders situated on the same side of the plane of tangency being driven in the same direction, and all the cylinders having the same tangential speed,
  • c) means for displacing the cylinders perpendicular to the plane of tangency, allowing on the one hand the introduction of the scabbed linen sheet between each pair of cylinders and on the other hand regulating the pressure exerted between the cylinders of a pair given.

Avantageusement, le dispositif selon l'invention comporte également des moyens de présentation de la nappe de fibres devant la paire de cylindres d'entrée. Les moyens de présentation peuvent être en particulier aptes à mettre la nappe sous tension en sorte de favoriser la parallélisation des fibres constitutives de la nappe.Advantageously, the device according to the invention also comprises means for presenting the sheet of fibers in front of the pair of input cylinders. The presentation means may in particular be capable of putting the sheet under tension so as to promote the parallelization of the fibers constituting the sheet.

Les moyens de déplacement des cylindres d'une paire donnée, perpendiculairement au plan de tangence, comprennent, montés sur les deux paliers soutenant l'axe de rotation d'un des deux cylindres de ladite paire, deux vérins pneumatiques dont la course varie entre une première position où les deux cylindres de la paire sont écartés et une seconde position où le premier cylindre exerce sur le second une pression. De préférence, les moyens de déplacement comportent des moyens de réglage de la seconde position de la course du vérin.The means of displacement of the cylinders of a given pair, perpendicular to the plane of tangency, comprise, mounted on the two bearings supporting the axis of rotation of one of the two cylinders of said pair, two pneumatic cylinders whose stroke varies between a first position where the two cylinders of the pair are spaced and a second position where the first cylinder exerts on the second press. Preferably, the displacement means comprise means for adjusting the second position of the cylinder stroke.

Les moyens de déplacement d'une paire de cylindres peuvent être totalement mécaniques. Ils comprennent par exemple :
. un ressort de compression, dont une extrémité est fixée sur le palier dans lequel tourne l'axe de rotation d'un des cylindres de la paire et dont l'autre extrémité est fixée sur une plaque mobile,
. une tige filetée dont une extrémité comporte un volant et l'autre est solidaire de la plaque mobile,
. une plaque fixe, montée sur un bâti , percée d'un évidement dont la surface intérieure a un profil fileté, et à travers duquel évidement passe la tige filetée.
Ces différents éléments sont agencés de telle sorte que l'opérateur peut faire varier la pression exercée entre les deux cylindres de la paire en tournant le volant dans un sens ou dans l'autre. La rotation du volant fait se déplacer la tige filetée par rapport à la plaque fixe et par conséquent la plaque mobile solidaire de la tige filetée. Le déplacement de la plaque mobile entraîne celui du ressort et la compression de celui-ci lorsque ce déplacement tend à rapprocher les deux cylindres. La plaque mobile est assortie d'un doigt placé en regard d'une échelle graduée montée sur le bâti : l'opérateur peut ainsi repérer, en fonction de la rotation du volant, la pression exercée entre les deux cylindres.The means for moving a pair of cylinders can be completely mechanical. They include for example:
. a compression spring, one end of which is fixed to the bearing in which the axis of rotation of one of the cylinders of the pair rotates and the other end of which is fixed to a movable plate,
. a threaded rod, one end of which has a flywheel and the other is secured to the movable plate,
. a fixed plate, mounted on a frame, pierced with a recess whose inner surface has a threaded profile, and through which recess passes the threaded rod.
These different elements are arranged so that the operator can vary the pressure exerted between the two cylinders of the pair by turning the hand wheel in one direction or the other. The rotation of the handwheel causes the threaded rod to move relative to the fixed plate and consequently the movable plate secured to the threaded rod. The movement of the movable plate causes that of the spring and the compression thereof when this movement tends to bring the two cylinders closer. The movable plate is accompanied by a finger placed opposite a graduated scale mounted on the frame: the operator can thus identify, depending on the rotation of the steering wheel, the pressure exerted between the two cylinders.

De préférence, le dispositif selon l'invention comporte de quatre à dix paires de cylindres, de surface lisse, et les moyens de déplacement exercent une force entre les cylindres de chaque paire comprise entre 140 et 1100 N au centimètre de ruban.Preferably, the device according to the invention comprises from four to ten pairs of cylinders, of smooth surface, and the displacement means exert a force between the cylinders of each pair of between 140 and 1100 N per centimeter of ribbon.

L'invention sera mieux comprise à la lecture de la description qui va être faite d'un exemple de réalisation , illustré par le dessin annexé dans lequel :

  • . la figure 1 est une vue schématique en coupe d'un dispositif équipé de sept paires de cylindres.
  • . la figure 2 est une vue de côté d'une paire de cylindres et des moyens de déplacement pneumatique associés.
  • . la figure 3 est une vue de côté , d'une paire de cylindres et des moyens de déplacement mécanique associés.
The invention will be better understood on reading the description which will be made of an exemplary embodiment, illustrated by the appended drawing in which:
  • . Figure 1 is a schematic sectional view of a device equipped with seven pairs of cylinders.
  • . Figure 2 is a side view of a pair of cylinders and associated pneumatic displacement means.
  • . Figure 3 is a side view of a pair of cylinders and associated mechanical displacement means.

Le ruban 1 de lin teillé titre environ 30 g/m. Il provient d'une peigneuse type lin mais dont le nombre de peignes a été réduit et dont le pointage a été diminué par rapport à la peigneuse habituelle. Le ruban 1 obtenu de la sorte présente une bonne régularité , une propreté satisfaisante, les fibres sont parallélisées , mais cependant l'action des peignes n'ayant pas été aussi importante, les fibres sont moins divisées que dans un ruban peigné habituel. De plus, le rendement de la peigneuse dans cette nouvelle configuration est nettement supérieur au rendement traditionnel de la peigneuse, puisqu'il est de l'ordre de 80% par rapport à 65%. La quantité d'étoupes de peignage qui sont des sous-produits est diminuée d'autant.Ribbon 1 of dyed linen measures approximately 30 g / m. It comes from a linen type comber but whose number of combs has been reduced and whose score has been reduced compared to the usual comber. The ribbon 1 obtained in this way has good regularity, satisfactory cleanliness, the fibers are parallelized, but however the action of the combs has not been as great, the fibers are less divided than in a usual combed ribbon. In addition, the performance of the combing machine in this new configuration is significantly higher than the traditional performance of the combing machine, since it is of the order of 80% compared to 65%. The quantity of combing tows which are by-products is reduced accordingly.

Le ruban 1 est présenté à plat dans un embarrage comprenant trois rouleaux 2,3,4 montés libres en rotation, d'axes parallèles. Le ruban 1 passe au-dessus du rouleau 2 , en dessous du rouleau 3, au-dessus du rouleau 4, le rouleau 3 étant en-dessous du plan passant par les axes de rotation des rouleaux 2 et 4.The ribbon 1 is presented flat in a fitting comprising three rolls 2,3,4 mounted free in rotation, with parallel axes. The ribbon 1 passes over the roller 2, below the roller 3, above the roller 4, the roller 3 being below the plane passing through the axes of rotation of the rollers 2 and 4.

A la sortie de cet embarrage, le ruban 1 passe successivement entre sept paires de cylindres d' axes parallèles aux rouleaux 2,3 et 4, dont les lignes de tangence sont dans le même plan (A,Aʹ), ledit plan étant lui-même tangent aux rouleaux 2 et 4 à la partie supérieure de leur périphérie. Tous les cylindres tournent à la même vitesse . Les axes de rotation 15 des cylindres sont équipés de pignons 6 d'engrenage comportant le même nombre de dents. Tous les cylindres 5 situés au-dessus du plan de tangence ont leurs pignons 6 reliés par une chaîne d'entraînement 7 entre eux et à un pignon 8 mû par un moteur 9. De Même tous les cylindres 10 situés en-dessous du plan de tangence ont leurs pignons 11 relies par une chaîne d'entraînement 12 entre eux et à un pignon 13 mû par un moteur 14. Les moteurs 9 et 14 entraînent leurs pignons respectifs8 et 13 à la même vitesse.At the exit from this embarrassment, the strip 1 passes successively between seven pairs of cylinders with axes parallel to the rollers 2, 3 and 4, the tangent lines of which are in the same plane (A, Aʹ), said plane being itself same tangent to the rollers 2 and 4 at the upper part of their periphery. All cylinders rotate at the same speed. The axes of rotation 15 of the cylinders are equipped with pinions 6 of gear comprising the same number of teeth. All the cylinders 5 situated above the tangency plane have their pinions 6 connected by a chain drive 7 between them and a pinion 8 driven by a motor 9. Likewise all the cylinders 10 situated below the plane of tangency have their pinions 11 connected by a drive chain 12 between them and to a pinion 13 driven by a motor 14. Motors 9 and 14 drive their respective pinions 8 and 13 at the same speed.

L'axe 15 de rotation d'un cylindre est monté à chaque extrémité sur un palier 16. Ce palier coulisse entre deux glissières 17 et 18 constituant le bâti support d'une paire de cylindres 5 et 6, le palier 19 étant fixé sur le bâti. Le vérin 20 est fixé sur le montant supérieur 21 ; l'extrémité de la tige 22 du vérin 20 est fixée sur le palier 16 correspondant au cylindre 5. Le vérin est à deux positions : la première, tige sortie comme montré sur la figure 2, pour laquelle les deux cylindres 5 et 10 sont appliqués l'un contre l'autre avec une force de 500 N au cm ; la seconde, tige rentrée, pour laquelle les deux cylindres 5 et 10 sont écartés l'un de l'autre, permettant l'introduction du ruban ou le nettoyage des cylindres.The axis 15 of rotation of a cylinder is mounted at each end on a bearing 16. This bearing slides between two slides 17 and 18 constituting the support frame of a pair of cylinders 5 and 6, the bearing 19 being fixed on the built. The jack 20 is fixed on the upper upright 21; the end of the rod 22 of the jack 20 is fixed on the bearing 16 corresponding to the cylinder 5. The jack is in two positions: the first, rod extended as shown in FIG. 2, for which the two cylinders 5 and 10 are applied one against the other with a force of 500 N per cm; the second, retracted rod, for which the two cylinders 5 and 10 are spaced from each other, allowing the introduction of the tape or the cleaning of the cylinders.

Chaque cylindre est en métal, de surface lisse, de longueur 75 centimètres, de diamètre 25 centimètres, et pèse 140 kg .Each cylinder is made of metal, with a smooth surface, length 75 centimeters, diameter 25 centimeters, and weighs 140 kg.

Le ruban I passe dans le système d'embarrage qui le met bien à plat et lui confère une certaine tension lorsqu'il passe ensuite entre les premiers cylindres 5 et 10. Le ruban 1 a une largeur de l'ordre de 5 centimètres . On peut faire passer sur le dispositif une pluralité de rubans ; dans ce cas, on peut ajouter des moyens de guidage sur le parcours des rubans entre chaque paire de cylindres pour éviter que les fibres d'un ruban ne s'emmêlent avec les fibres du ruban qui lui est adjacent.The ribbon I passes through the tying system which places it flat and gives it a certain tension when it then passes between the first cylinders 5 and 10. The ribbon 1 has a width of the order of 5 centimeters. A plurality of ribbons can be passed over the device; in this case, one can add guide means on the path of the ribbons between each pair of cylinders to prevent the fibers of a ribbon from becoming entangled with the fibers of the ribbon which is adjacent to it.

Le ruban de lin teillé, après avoir subi l'écrasement entre les 7 paires de cylindres, est ensuite transformé, après passage sur une doubleuse et craquage, sur le matériel de préparation du type laine peignée : premier passage sur intersecting, peignage (sur peigneuse type laine et non peigneuse lin) suivi de trois ou quatre passages sur intersecting, puis passage sur banc à broches. La mèche obtenue peut être filée directement dans le cas de la filature au sec ou après dégommage dans le cas de la filature au mouillé.The dyed linen ribbon, after being crushed between the 7 pairs of cylinders, is then transformed, after passing through a doubler and cracking, on the preparation material of the combed wool type: first pass on intersecting, combing (on comber wool type and not linen combing) followed by three or four passes on intersecting, then passage on a bench with pins. The lock obtained can be spun directly in the case of dry spinning or after degumming in the case of spinning in the dry. wet.

Les différents prélèvements effectués au cours du circuit de préparation précité ont montré un affinage progressif du lin, supérieur à ce qui peut être obtenu par le circuit lin classique en partant d'un ruban de lin 1 non traité selon l'invention. Cet affinage est dû à l'élimination de certains ciments organiques qui ont été écrasés, fissurés, et désolidarisés des fibres unitaires. Ainsi un ruban de lin teillé après passage sur une peigneuse type lin, de laquelle ont été retirés les peignes les plus denses et les plus fins puis passage sur une doubleuse avait un indice de finesse de 63,14 % . Ce même ruban , après avoir subi la préparation type laine comme indiqué ci-dessus, avait avant le passage sur banc à broches un indice de 42,20 %. Par contre, le même ruban , ayant subi la même préparation mais après avoir été préalablement traité conformément à l'invention sur le dispositif d'écrasement à sept paires de cylindres, présentait un indice de 36,38%, et donc une finesse tout-à-fait acceptable pour la filature au mouillé et la filature au sec.The various samples taken during the aforementioned preparation circuit have shown a gradual refining of the flax, greater than what can be obtained by the conventional flax circuit starting from a flax ribbon 1 not treated according to the invention. This refining is due to the elimination of certain organic cements which have been crushed, cracked, and separated from the unit fibers. Thus a strip of flax dyed after passing over a linen combing machine, from which the densest and finest combs were removed and then passing over a doubler had a fineness index of 63.14%. This same ribbon, after having undergone the wool-type preparation as indicated above, had before the passage on a bench with pins an index of 42.20%. On the other hand, the same ribbon, having undergone the same preparation but after having been previously treated in accordance with the invention on the crushing device with seven pairs of cylinders, had an index of 36.38%, and therefore an all-round finesse. perfectly acceptable for wet spinning and dry spinning.

Dans un autre mode de réalisation des moyens de déplacement des cylindres supérieurs 5, le vérin 20 est remplacé sur un ensemble de moyens purement mécaniques, permettant le réglage manuel de la pression entre les cylindres 5 et 10. Cet ensemble comprend un ressort de compression 23 placé entre les deux glissières 17 et 18, au-dessus du palier 16. Une extrémité 23a du ressort 23 est fixée à la partie supérieure du palier 16. L'autre extrémité 23b est fixée à une plaque mobile verticalement dans les glissières 17 et 18 , comportant un palier 25 dans lequel peut tourner librement la tige 26. La partie supérieure 21 du bâti présente un évidement 27 dont la surface intérieure a un profil fileté. La tige 26 est une tige filetée, elle passe à travers l'évidement 27 et se termine par un volant 28. La plaque mobile 24 est équipée d'un doigt 29 et sur le montant de la glissière 17, en regard du doigt 29, est placée une échelle graduée 30.In another embodiment of the means for moving the upper cylinders 5, the jack 20 is replaced on a set of purely mechanical means, allowing manual adjustment of the pressure between the cylinders 5 and 10. This set includes a compression spring 23 placed between the two slides 17 and 18, above the bearing 16. One end 23a of the spring 23 is fixed to the upper part of the bearing 16. The other end 23b is fixed to a plate movable vertically in the slides 17 and 18 , comprising a bearing 25 in which the rod 26 can freely rotate. The upper part 21 of the frame has a recess 27 whose inner surface has a threaded profile. The rod 26 is a threaded rod, it passes through the recess 27 and ends with a flywheel 28. The movable plate 24 is equipped with a finger 29 and on the upright of the slide 17, opposite the finger 29, a graduated scale 30 is placed.

Pour augmenter la pression entre les cylindres 5 et 10, ce dernier étant fixe, l'opérateur fait tourner le volant 28 dans le sens des aiguilles d'une montre. La tige filetée 26 descend à travers l'évidement 27, entraînant la plaque 24 et la compression du ressort 23 contre le palier 16. La position du doigt 29 sur l'échelle graduée 30 donne l'indication de la compression du ressort et donc la pression exercée par le cylindre 5 sur le cylindre 10. Dans l'exemple décrit de sept paires de cylindres, le dispositif est équipé de quatorze points de réglage comme ci-dessus, placés au-dessus des paliers 16 des deux extrémités de chaque cylindre 5.To increase the pressure between the cylinders 5 and 10, the latter being fixed, the operator turns the flywheel 28 in the clockwise. The threaded rod 26 descends through the recess 27, causing the plate 24 and the compression of the spring 23 against the bearing 16. The position of the finger 29 on the graduated scale 30 gives the indication of the compression of the spring and therefore the pressure exerted by the cylinder 5 on the cylinder 10. In the example described of seven pairs of cylinders, the device is equipped with fourteen adjustment points as above, placed above the bearings 16 of the two ends of each cylinder 5 .

L'invention n'est pas limitée au mode de réalisation et à l'exemple décrits ci-dessus. En particulier , il revient à l'homme du métier de choisir le nombre de paires de cylindres et la pression à exercer, en fonction du prétraitement subi par la nappe de lin teillé, en particulier du peignage, et également en fonction des caractéristiques morphologiques propres à la récolte. Ce choix doit être conduit par les critères de l'invention, à savoir que les ciments organiques soient fissurés sans que les fibres unitaires soient elles-mêmes endommagées.The invention is not limited to the embodiment and to the example described above. In particular, it is up to the person skilled in the art to choose the number of pairs of cylinders and the pressure to be exerted, as a function of the pretreatment undergone by the dyed linen sheet, in particular the combing, and also as a function of the morphological characteristics proper. at harvest. This choice must be driven by the criteria of the invention, namely that the organic cements are cracked without the unitary fibers themselves being damaged.

Claims (7)

1. Procédé de traitement de lin du type consistant à écraser le lin en déplacement continu par une succession de moyens de pression caractérisé en ce que, il consiste à écraser les fibres d'un lin préalablement teillé et à peu près exemptes d'impuretés, alors que celles-ci se présentent sous la forme d'une nappe approximativement régulière de fibres parallélisées , en sorte de fissurer les ciments organiques sans endommager les fibres unitaires.1. A method of treating flax of the type consisting in crushing flax in continuous movement by a succession of pressure means, characterized in that it consists in crushing the fibers of a flax previously dyed and almost free from impurities, while these are in the form of an approximately regular sheet of parallelized fibers, so as to crack the organic cements without damaging the unit fibers. 2. Procédé selon la revendication 1 caractérisé en ce que la nappe (1) de lin teillé est écrasée par une succession de quatre à dix moyens de pression (5, 10), exerçant chacun une force, transversalement à la nappe, comprise entre 140 et 1100 N au centimètre de nappe.2. Method according to claim 1 characterized in that the tablecloth (1) of dyed flax is crushed by a succession of four to ten pressure means (5, 10), each exerting a force, transverse to the tablecloth, between 140 and 1100 N per centimeter of water table. 3. Procédé selon l'une des revendications 1 et 2 caractérisé en ce que la nappe de lin teillé est un ruban (1) provenant d'une peigneuse type lin dont on a enlevé une partie des peignes.3. Method according to one of claims 1 and 2 characterized in that the dyed linen sheet is a ribbon (1) from a linen type comber from which part of the combs has been removed. 4. Dispositif de traitement du lin teillé destiné à la mise en oeuvre du procédé selon la revendication 1 caractérisé en ce qu'il comprend : a) une succession de paires de cylindres (5, 10) , tangents deux à deux suivant un même plan (A,Aʹ), b) des moyens d'entraînement (9, 14) en rotation des paires de cylindres, un cylindre (5) d'une paire donnée étant entraîné en rotation dans le sens opposé à celui (10) de l'autre cylindre, tous les cylindres (5) situés d'un même côté du plan de tangence (A,Aʹ) étant entraînés dans le même sens, et tous les cylindres ayant la même vitesse tangentielle. c) des moyens de déplacement des cylindres perpendiculairement au plan de tangence, permettant d'une part l'introduction de la nappe de lin teillé entre chaque paire de cylindres et d'autre part de régler la pression exercée entre les cylindres d'une paire donnée. 4. Device for treating dyed flax intended for implementing the method according to claim 1, characterized in that it comprises: a) a succession of pairs of cylinders (5, 10), tangent two by two along the same plane (A, Aʹ), b) drive means (9, 14) for rotating the pairs of cylinders, a cylinder (5) of a given pair being driven in rotation in the opposite direction to that (10) of the other cylinder, every cylinders (5) located on the same side of the tangency plane (A, Aʹ) being driven in the same direction, and all the cylinders having the same tangential speed. c) means for displacing the cylinders perpendicularly to the plane of tangency, allowing on the one hand the introduction of the scabbed linen sheet between each pair of cylinders and on the other hand regulating the pressure exerted between the cylinders of a pair given. 5. Dispositif selon la revendication 4 caractérisé en ce que les moyens de déplacement des cylindres (5, 10) d'une paire donnée, perpendiculairement au plan de tangence, comprennent, montés sur les deux paliers (16) soutenant l'axe de rotation ( 15) d'un (5) des deux cylindres de ladite paire, deux vérins (20) pneumatiques dont la course varie entre une première position où les deux cylindres de la paire sont écartés et une seconde position où le premier cylindre (5) exerce sur le second une pression.5. Device according to claim 4 characterized in that the means for moving the cylinders (5, 10) of a given pair, perpendicular to the plane of tangency, comprise, mounted on the two bearings (16) supporting the axis of rotation (15) of one (5) of the two cylinders of said pair, two pneumatic cylinders (20) whose stroke varies between a first position where the two cylinders of the pair are apart and a second position where the first cylinder (5) exerts pressure on the second. 6. Dispositif selon la revendication 4 caractérisé en ce que les moyens de déplacement d'une paire (5, 10) de cylindres comprennent:
. un ressort (23) de compression, dont une extrémité (23a) est fixée sur le palier (16) dans lequel tourne l'axe de rotation ( 15) d'un (5) des cylindres de la paire et dont l'autre extrémité (23b) est fixée sur une plaque mobile (24),
. une tige filetée (26) dont une extrémité comporte un volant (28) et l'autre est solidaire de la plaque mobile (24),
. une plaque fixe (21), montée sur un bâti, percée d'un évidement (27) dont la surface intérieure a un profil fileté, et à travers duquel évidement passe la tige filetée (24).6. Device according to claim 4 characterized in that the means for moving a pair (5, 10) of cylinders comprise:
. a compression spring (23), one end of which (23a) is fixed to the bearing (16) in which the axis of rotation (15) of one (5) of the cylinders of the pair rotates and the other end of which (23b) is fixed on a movable plate (24),
. a threaded rod (26), one end of which has a flywheel (28) and the other is secured to the movable plate (24),
. a fixed plate (21), mounted on a frame, pierced with a recess (27) whose inner surface has a threaded profile, and through which recess passes the threaded rod (24). 7. Dispositif selon la revendication 4 caractérisé en ce qu'il comporte de quatre à dix paires de cylindres (5, 10), de surface lisse, et les moyens de déplacement exercent une force entre les cylindres de chaque paire comprise entre 140 et 1100 N au centimètre de nappe.7. Device according to claim 4 characterized in that it comprises from four to ten pairs of cylinders (5, 10), of smooth surface, and the displacement means exert a force between the cylinders of each pair between 140 and 1100 N per centimeter of tablecloth.
EP88400886A 1987-04-23 1988-04-13 Method and apparatus for improving the flax separation into fibres Withdrawn EP0288358A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8705768A FR2614323B1 (en) 1987-04-23 1987-04-23 METHOD AND DEVICE FOR IMPROVING THE DIVISIBILITY OF FIBER LINEN.
FR8705768 1987-04-23

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EP0288358A1 true EP0288358A1 (en) 1988-10-26

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE651259C (en) * 1935-02-09 1937-10-09 Bast fiber processing machine with beating drums working in pairs
US2576406A (en) * 1944-12-30 1951-11-27 Manero Device for crushing and cleaning fibrous vegetable units
FR1009391A (en) * 1948-04-17 1952-05-28 Method for treating flax, installation for implementing this method and mechanism for transporting stems
FR1046692A (en) * 1951-07-13 1953-12-08 Coll Adriano Gardella & F Llo Bast fiber and bark shelling machine
FR1053851A (en) * 1951-04-24 1954-02-05 Sativa Corp Improvements made to shelling machines for fibrous materials
FR2451406A1 (en) * 1979-03-15 1980-10-10 Pacquet Denis Spreading machine, e.g. for flax or straw - provides passage of decreasing width, for the formation of regular layer of stalks

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE651259C (en) * 1935-02-09 1937-10-09 Bast fiber processing machine with beating drums working in pairs
US2576406A (en) * 1944-12-30 1951-11-27 Manero Device for crushing and cleaning fibrous vegetable units
FR1009391A (en) * 1948-04-17 1952-05-28 Method for treating flax, installation for implementing this method and mechanism for transporting stems
FR1053851A (en) * 1951-04-24 1954-02-05 Sativa Corp Improvements made to shelling machines for fibrous materials
FR1046692A (en) * 1951-07-13 1953-12-08 Coll Adriano Gardella & F Llo Bast fiber and bark shelling machine
FR2451406A1 (en) * 1979-03-15 1980-10-10 Pacquet Denis Spreading machine, e.g. for flax or straw - provides passage of decreasing width, for the formation of regular layer of stalks

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Publication number Publication date
FR2614323A1 (en) 1988-10-28
FR2614323B1 (en) 1990-03-09

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