FR2647764A1 - Method for facilitating the removal of a pile (wad) of fabric pieces which have been cut out on automatic cutting machines having a conveyor - Google Patents

Method for facilitating the removal of a pile (wad) of fabric pieces which have been cut out on automatic cutting machines having a conveyor Download PDF

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Publication number
FR2647764A1
FR2647764A1 FR8907340A FR8907340A FR2647764A1 FR 2647764 A1 FR2647764 A1 FR 2647764A1 FR 8907340 A FR8907340 A FR 8907340A FR 8907340 A FR8907340 A FR 8907340A FR 2647764 A1 FR2647764 A1 FR 2647764A1
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FR
France
Prior art keywords
conveyor
compartment
mattress
pieces
cut
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.)
Granted
Application number
FR8907340A
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French (fr)
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FR2647764B1 (en
Inventor
Jean Etcheparre
Bernard Etcheparre
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.)
Lectra SA
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Lectra Systemes SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority to FR8907340A priority Critical patent/FR2647764B1/en
Publication of FR2647764A1 publication Critical patent/FR2647764A1/en
Application granted granted Critical
Publication of FR2647764B1 publication Critical patent/FR2647764B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/018—Holding the work by suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • B26D7/0675—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form specially adapted for piles of sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1845—Means for removing cut-out material or waste by non mechanical means
    • B26D7/1863—Means for removing cut-out material or waste by non mechanical means by suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/24—Delivering or advancing articles from machines; Advancing articles to or into piles by air blast or suction apparatus
    • B65H29/241—Suction devices
    • B65H29/242—Suction bands or belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/28—Bands, chains, or like moving receivers

Abstract

Method for removing a pile of fabric pieces which have been cut out beforehand on an automatic cutting machine, comprising a conveyor 1 formed by an endless belt, which can move translationally between a driving shaft 3 and a tensioning shaft 2 and is supported by a sliding table 7 mounted on a vacuum compartment 10 divided into a front box (casing) 15 and a rear box 16 by means of sealing plates 13, characterised in that the pile of cut-out pieces is removed from the conveyor 1 in the region of the front box 15 by bringing the latter up to atmospheric pressure.

Description

Procédé pour faciliter l'évacuation d'un matelas de pièces de tissu
découpées sur des machines de coupe automatiques à convoyeur.Method for facilitating the evacuation of a mattress from pieces of fabric
cut on automatic conveyor cutting machines.

I1 est connu d'utiliser des machines de coupe
automatiques pour la découpe d'empilages de matières en feuilles en
matelas suivant un arrangement optimisé des pièces (dénommé
placement-), lequel a été préalablement programmé à l'aide d'un
système informatisé. C'est le cas, par exemple, en confection textile, où il est possible de découper plusieurs dizaines de plis de tissu en une seule opération et ainsi obtenir autant de vetement que de plis.It is known to use cutting machines
machines for cutting stacks of sheet material into
mattress according to an optimized arrangement of parts (called
placement-), which was previously programmed using a
computerized system. This is the case, for example, in textile confection, where it is possible to cut several tens of plies of fabric in a single operation and thus obtain as much clothing as pleats.

Ces machines utilisent comme outil de coupe, une lame vibrant à une fréquence élevée, laquelle est portée par une tete de coupe et se déplace au travers de l'emp -age de matières, suivant une trajectoire générée par une commande numérique. These machines use as cutting tool, a blade vibrating at a high frequency, which is carried by a cutting head and moves through the packaging of materials, following a trajectory generated by a numerical control.

Le support de coupe est généralement constitué par une structure de type -tapis brosse- de façon à ce que la lame, lorsqu'elle est engagée dans l'empilage et du fait de sa vibration, puisse découper tous les plis sans etre endommagée et sans endommager le support. The cutting support is generally constituted by a structure of the type - brush mat - so that the blade, when it is engaged in the stack and due to its vibration, can cut all the folds without being damaged and without damage the support.

Etant donné les efforts importants générés par la lame de coupe lors de ses déplacements, il est nécessaire de maintenir fermement la matière sur le support de coupe. Pcur cela, il est courant de mettre en dépression le dessous du matelas, après avoir étanché le dessus à l'aide d'un film en matière plastique par exemple, de façon à ce que la pression atmosphérique exerce une compression suffisante pour rendre ce matelas compact. Given the significant forces generated by the cutting blade during its movements, it is necessary to firmly hold the material on the cutting support. For this, it is common to vacuum the underside of the mattress, after sealing the top with a plastic film for example, so that the atmospheric pressure exerts sufficient compression to make this mattress compact.

Afin d'atteindre une productivité élevée, il est préférable que le support de coupe se présente sous forme d'un convoyeur. Ainsi, il est possible de découper pas par pas et de faire avancer le convoyeur entre chaque découpe pour évacuer la partie de l'empilage découpée aurdessus d'une table dite d'évacuation. Les opérations de coupe et de récupération des pièces découpées peuvent ainsi se faire en temps masqué. In order to achieve high productivity, it is preferable that the cutting support is in the form of a conveyor. Thus, it is possible to cut step by step and advance the conveyor between each cut to evacuate the portion of the stack cut above a so-called evacuation table. The cutting and recovery operations of the cut pieces can thus be done in masked time.

C'est au moment de cette phase d'évacuation que l'on rencontre généralement des problèmes. En effet, afin C'éviter que le matelas ne glisse lors de la rotation du convoyeur, il est nécessaire de maintenir la dépression en dessous. Ceci est gênant en extrémité avant du convoyeur, car c'est à cet endroit que le matelas découpé quitte le support de coupe pour passer sur la table d'évacuation. Le matelas, sous l'action de la dépression, a donc des difficultés à passer, ce qui se traduit généralement par un bourrage et sa détérioration. It is during this evacuation phase that problems are generally encountered. In fact, in order to prevent the mattress from sliding during the rotation of the conveyor, it is necessary to maintain the vacuum below. This is annoying at the front end of the conveyor, because it is there that the cut mattress leaves the cutting support to pass on the evacuation table. The mattress, under the action of depression, therefore has difficulty passing, which generally results in a stuffing and its deterioration.

L'invention a pour but de résoudre ce problème technique de manière satisfaisante. The invention aims to solve this technical problem satisfactorily.

Ce but est atteint conformément à l'invention en prévoyant un procédé d'évacuation d'un matelas de pièces de tissu découpés préalablement sur une machine de coupe automatique comprenant un convoyeur formé d'une bande sans fin, mobile en translation entre un arbre moteur et un arbre tendeur et supporté par une table de glissement montée sur un compartiment à dépression divisé en un caisson avant et un caisson arrière au moyen de plaques d'étanchéité, caractérisé en ce que l'on effectue le décollement du matelas de pièces découpées à partir du convoyeur au niveau du caisson avant par mise à la pression atmosphérique de ce dernier. This object is achieved in accordance with the invention by providing a method of evacuating a mattress of pieces of fabric cut out beforehand on an automatic cutting machine comprising a conveyor formed by an endless band, movable in translation between a motor shaft. and a tensioning shaft and supported by a sliding table mounted on a vacuum compartment divided into a front box and a rear box by means of sealing plates, characterized in that the mattress is detached from the cut pieces to from the conveyor at the front casing by atmospheric pressure of the latter.

Selon une autre caractéristique du procédé de l'invention, la mise à la pression atmosphérique du caisson avant du compartiment à dépression est réalisée par ouverture d'une trappe située sur la paroi frontale avant du compartiment à dépression. According to another characteristic of the process of the invention, the front chamber of the vacuum compartment is brought to atmospheric pressure by opening a hatch located on the front front wall of the vacuum compartment.

Un autre objet de l'invention est un dispositif d'évacuation d'un matelas de pièces de tissu découpées sur des machines de coupe automatiques comprenant un compartiment à- dépression entre les faces latérales duquel se trouve un convoyeur sous forme d'une bande sans fin supportée par une table de glissement formant paroi supérieure dudit compartiment et animée d'un mouvement de translation entre un arbre moteur et un arbre tendeur, ledit compartiment étant relié à une turbine d'aspiration, caractérisé en ce que ledit compartiment est divisé en deux
caissons respectivement avant et arrière, séparés par des plaques
d'étanchéité de telle sorte que le caisson avant peut etre mis en
communication avec l'extérieur à la pression atmosphérique
indépendamment du caisson arrière, afin de permettre le
décollement du matelas de pièces découpées.Another object of the invention is a device for evacuating a mattress from pieces of fabric cut out on automatic cutting machines comprising a vacuum compartment between the lateral faces of which there is a conveyor in the form of a band without end supported by a sliding table forming the upper wall of said compartment and driven in a translational movement between a motor shaft and a tensioning shaft, said compartment being connected to a suction turbine, characterized in that said compartment is divided into two
front and rear boxes respectively, separated by plates
sealing so that the front housing can be put in
communication with the outside at atmospheric pressure
independently of the rear casing, in order to allow
separation of the mattress from cut pieces.

Le procédé de l'invention sera mieux compris à la lecture
de la description qui va suivre accompagnée du, dessin annexé sur
lequel la figure 1 représente une vue en coupe latérale du
dispositif de l'invention.The process of the invention will be better understood on reading
of the description which will follow accompanied by the drawing attached to
which Figure 1 shows a side sectional view of the
device of the invention.

La machine est constituée d'un bati supérieur 10 posé sur un bâti inférieur 11. Le bâti supérieur 10 constitue un
compartiment étanche dont seule la face supérieure est ouverte. A l'intérieur de ce bêti 10, on trouve un mécanisme de convoyeur 1 construit autour d'un réseau d'entretoises 8 reliant les deux flancs latéraux du bâti 10. Sur ces entretoises 8 est fixée une table de glissement 7 laquelle supporte le brin supérieur du convoyeur 1.The machine consists of an upper frame 10 placed on a lower frame 11. The upper frame 10 constitutes a
watertight compartment of which only the upper face is open. Inside this frame 10, there is a conveyor mechanism 1 built around a network of spacers 8 connecting the two lateral flanks of the frame 10. On these spacers 8 is fixed a sliding table 7 which supports the strand upper conveyor 1.

A l'intérieur du bêti 11 se trouve une turbine 9 dont l'ouie d'aspiration est en communication avec le bti supérieur 10 formant compartiment à dépression et donc avec le convoyeur 1. Inside the frame 11 is a turbine 9 whose suction outlet is in communication with the upper frame 10 forming a vacuum compartment and therefore with the conveyor 1.

Le convoyeur 1 est formé d'une bande sans fin comprenant une succession de lattes métalliques supportant chacune une série d'éléments de type tapis brosse, à la façon d'une chenille. Un arbre moteur 3 et un arbre tendeur 2 assurent le mouvement en translation et la tension du convoyeur 1. The conveyor 1 is formed of an endless belt comprising a succession of metal slats each supporting a series of elements of the brush mat type, like a caterpillar. A drive shaft 3 and a tensioner shaft 2 ensure the translational movement and the tension of the conveyor 1.

Le dimensionnement du convoyeur 1 est tel que son brin supérieur affleure l'ouverture superieure du bâti 10 et que son brin inférieur repose sur le fond du bêti 10 tout en pouvant glisser librement. Le bord avant de l'ouverture supérieure du bêti 10 est munie d'une pièce en forme de peigne 12 dont les dents sont légèrement courbées vers le bas et pénètrent dans la structure tapis brosse du convoyeur. The dimensioning of the conveyor 1 is such that its upper strand is flush with the upper opening of the frame 10 and that its lower strand rests on the bottom of the frame 10 while being able to slide freely. The front edge of the upper opening of the frame 10 is provided with a comb-shaped part 12, the teeth of which are slightly curved downwards and penetrate into the brush mat structure of the conveyor.

Sur l'entretoise du bêti 10 la plus en avant, sont fixées deux plaques souples d'étanchéité 13, sur toute la largeur de la machine et venant frotter sur l'envers du brin inférieur du convoyeur. Ces plaques d'étanchéité ont pour effet d'isoler l'avant du convoyeur par rapport au reste de la machine, à la porosité près des lattés constituées d'éléments tapis brosse, créant ainsi un caisson avant 15 où est disposé l'arbre moteur 3 et un caisson arrière 16 où sont disposés l'ouie de la turbine 9 et l'arbre tendeur 2. On the spacer of the bet 10 furthest forward, two flexible sealing plates 13 are fixed, over the entire width of the machine and rubbing against the back of the lower strand of the conveyor. These sealing plates have the effect of isolating the front of the conveyor relative to the rest of the machine, with the porosity near the battens made up of brush mat elements, thus creating a front box 15 where the motor shaft is arranged. 3 and a rear box 16 which are arranged the outlet of the turbine 9 and the tensioning shaft 2.

Sur la paroi frontale avant du bâti 10 est disposée une trappe 14 permettant de mettre le caisson avant 15 en communication avec l'extérieur. Cette trappe peut être commandée à distance, par l'intermédiaire de la commande numérique. On the front front wall of the frame 10 is disposed a hatch 14 making it possible to put the front box 15 in communication with the outside. This hatch can be controlled remotely, via digital control.

Le fonctionnement est le suivant
En phase de découpe, la trappe 14 est fermée. Le matelas est recouvert d'un film étanche à l'air et la turbine crée la dépression dans le compartiment 10. La matière déposée sur le brin supérieur du convoyeur 1 est donc fermement maintenue. Le débit de la turbine est alors très faible car il y a très peu de fuites (lignes de coupe et petites fuites mécaniques). La dépression se répartir alors parfaitement en tout point du caisson arrière 16 mais aussi dans le caisson avant 15, malgré le passage au travers des poils du tapis brosse.The operation is as follows
In the cutting phase, the hatch 14 is closed. The mattress is covered with an airtight film and the turbine creates a vacuum in the compartment 10. The material deposited on the upper strand of the conveyor 1 is therefore firmly maintained. The turbine flow rate is then very low because there are very few leaks (cutting lines and small mechanical leaks). The depression is then distributed perfectly at all points of the rear box 16 but also in the front box 15, despite the passage through the bristles of the brush mat.

En phase d'avance du convoyeur, on ouvre la trappe 14. In the conveyor advance phase, the hatch 14 is opened.

Le caisson avant est donc mis à l'air libre et constitue une feuite importante par rapport au caisson arrière 16. Cette fuite est malgré tout freinée par le passage au travers des poils du tapis brosse mais étant donné que ce freinage de l'air s'exerce en arrière de la zone de décollement du matelas par rapport au convoyeur, le caisson avant 15 est quasiment à la pression atmosphérique alors que le caisson arrière 16 subit la dépression quasi complète due à la turbine. On obtient ainsi une zone sous forte dépression maintenant fermement le matelas pour l'empêcher de glisser, et une zone sous dépression quasi nulle permettant au matelas de quitter sans encombre le convoyeur en passant par dessus la pièce en forme de peigne 12. The front box is therefore exposed to the open air and constitutes a significant reduction in relation to the rear box 16. This leak is nevertheless slowed down by the passage through the bristles of the brush mat but since this braking of the air s 'exerts behind the separation zone of the mattress relative to the conveyor, the front box 15 is almost at atmospheric pressure while the rear box 16 undergoes almost complete depression due to the turbine. There is thus obtained a zone under strong depression which keeps the mattress firmly to prevent it from sliding, and a zone with almost zero vacuum allowing the mattress to leave the conveyor without incident, passing over the comb-shaped part 12.

Claims (3)

REVENDICATIONS 1. Procédé d'évacuation d'un matelas de pièces de tissu découpées préalablement sur une machine de coupe automatique comprenant un convoyeur(1) formé d'une bande sans fin, mobile en translation entre un arbre moteur (3) et un arbre tendeur (2) et supporté par une table de glissement (7) montée sur un compartiment à dépression (10) divisé en un caisson avant (15) et un caisson arrière (16) au moyen de plaques d'étanchéité (13) caractérisé en ce que l'on effectue le décollement du matelas de pièces découpées à partir du convoyeur (1) au niveau du caisson avant (15) par mise à la pression atmosphérique de ce dernier. 1. Method of evacuating a mattress of pieces of fabric previously cut on an automatic cutting machine comprising a conveyor (1) formed of an endless band, movable in translation between a motor shaft (3) and a tensioning shaft (2) and supported by a sliding table (7) mounted on a vacuum compartment (10) divided into a front box (15) and a rear box (16) by means of sealing plates (13) characterized in that that the separation of the mattress from the cut pieces is carried out from the conveyor (1) at the front casing (15) by putting the latter at atmospheric pressure. 2. Procédé selon la revendication 1, caractérisé en ce que la mise à la pression atmosphérique du caisson avant (15) du compartiment à dépression (10) est réalisée par ouverture d'une trappe (14) située sur la paroi frontale avant du compartiment à dépression.2. Method according to claim 1, characterized in that the atmospheric pressure of the front box (15) of the vacuum compartment (10) is produced by opening a hatch (14) located on the front front wall of the compartment depression. 3. Oispositif d'évacuation d'un matelas de pièces de tissu découpées sur des machines de coupe automatiques comprenant un compartiment à dépression (10) entre les faces latérales duquel se trouve un convoyeur (1) sous forme d'une bande sans fin supportée par une table de glissement (7) formant paroi supérieure dudit compartiment et animée d'un mouvement de translation entre un arbre moteur (3) et un arbre tendeur (2) ledit compartiment étant relié à une turbine d'aspiration (9) caractérisé en ce que ledit compartiment est divisé en deux caissons respectivement avant (15) et arrière (16) , séparés par des plaques d'étanchéité (13) de telle sorte que le caisson avant (15) peut etre mis en communication avec l'extérieur à la pression atmosphérique indépendamment du caisson arrière (16) afin de permettre le décollement du matelas de pièces découpées. 3. Device for evacuating a mattress from pieces of fabric cut out on automatic cutting machines comprising a vacuum compartment (10) between the lateral faces of which there is a conveyor (1) in the form of a supported endless belt by a sliding table (7) forming the upper wall of said compartment and driven in a translational movement between a motor shaft (3) and a tensioning shaft (2) said compartment being connected to a suction turbine (9) characterized in that said compartment is divided into two boxes respectively front (15) and rear (16), separated by sealing plates (13) so that the front box (15) can be placed in communication with the outside at atmospheric pressure independently of the rear casing (16) in order to allow the separation of the mattress from cut pieces.
FR8907340A 1989-06-02 1989-06-02 PROCESS FOR FACILITATING THE EVACUATION OF A MATTRESS OF CUT FABRIC PIECES ON AUTOMATIC CUTTING MACHINES WITH CONVEYOR Expired - Lifetime FR2647764B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8907340A FR2647764B1 (en) 1989-06-02 1989-06-02 PROCESS FOR FACILITATING THE EVACUATION OF A MATTRESS OF CUT FABRIC PIECES ON AUTOMATIC CUTTING MACHINES WITH CONVEYOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8907340A FR2647764B1 (en) 1989-06-02 1989-06-02 PROCESS FOR FACILITATING THE EVACUATION OF A MATTRESS OF CUT FABRIC PIECES ON AUTOMATIC CUTTING MACHINES WITH CONVEYOR

Publications (2)

Publication Number Publication Date
FR2647764A1 true FR2647764A1 (en) 1990-12-07
FR2647764B1 FR2647764B1 (en) 1992-04-10

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994005174A1 (en) * 1992-09-01 1994-03-17 Lectra Systemes Installation for cutting sheet material
FR2695863A1 (en) * 1992-09-04 1994-03-25 Hotoku Kogyo Kk Corrugated cardboard sheet folding apparatus.
US5819620A (en) * 1992-09-01 1998-10-13 Lectra Systemes Installation for cutting sheet material
FR2825313A1 (en) * 2001-05-31 2002-12-06 Lectra Systemes Sa Continuous cleaner for conveyor belt has air aspirated through upper and lower runs of belt

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104141218A (en) * 2014-07-22 2014-11-12 拓卡奔马机电科技有限公司 Automatic cleaning system for bristle bed of cutting bed and automatic cleaning method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2712677A1 (en) * 1977-03-23 1978-09-28 Bielomatik Leuze & Co TRANSPORT DEVICE FOR OBJECTS, IN PARTICULAR LAYERS OF LEAVES OR DGL.
GB2009714A (en) * 1977-12-10 1979-06-20 Jagenberg Werke Ag Sheet delivery apparatus
FR2527570A1 (en) * 1982-05-27 1983-12-02 Cuir Sa Conveyor belt with suction pick=up - moves and deposits sheet using high intake in high vacuum drop zone

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2712677A1 (en) * 1977-03-23 1978-09-28 Bielomatik Leuze & Co TRANSPORT DEVICE FOR OBJECTS, IN PARTICULAR LAYERS OF LEAVES OR DGL.
GB2009714A (en) * 1977-12-10 1979-06-20 Jagenberg Werke Ag Sheet delivery apparatus
FR2527570A1 (en) * 1982-05-27 1983-12-02 Cuir Sa Conveyor belt with suction pick=up - moves and deposits sheet using high intake in high vacuum drop zone

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994005174A1 (en) * 1992-09-01 1994-03-17 Lectra Systemes Installation for cutting sheet material
US5819620A (en) * 1992-09-01 1998-10-13 Lectra Systemes Installation for cutting sheet material
FR2695863A1 (en) * 1992-09-04 1994-03-25 Hotoku Kogyo Kk Corrugated cardboard sheet folding apparatus.
FR2825313A1 (en) * 2001-05-31 2002-12-06 Lectra Systemes Sa Continuous cleaner for conveyor belt has air aspirated through upper and lower runs of belt

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Publication number Publication date
FR2647764B1 (en) 1992-04-10

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