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EP 0 512 189 B1 |
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EUROPEAN PATENT SPECIFICATION |
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Mention of the grant of the patent: |
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11.12.1996 Bulletin 1996/50 |
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Date of filing: 09.07.1991 |
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International Patent Classification (IPC)6: D06B 3/28 |
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A machine for dyeing fabric in rope form
Vorrichtung zum Färben von strangförmigem Textilgut
Installation pour teindre un tissu en boyau
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Designated Contracting States: |
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DE DK ES FR GB GR IT |
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Priority: |
08.05.1991 IT TO910105 U
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Date of publication of application: |
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11.11.1992 Bulletin 1992/46 |
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Proprietor: FLAINOX S.r.l. |
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I-13010 Quaregna (Biella) (IT) |
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Inventor: |
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- Bozzo, Giovanni
I-13010 Quaregna (Vercelli) (IT)
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Representative: Bosotti, Luciano et al |
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c/o JACOBACCI & PERANI S.p.A.
Corso Regio Parco, 27 10152 Torino 10152 Torino (IT) |
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References cited: :
EP-A- 0 334 749 DE-C- 937 465 FR-A- 2 619 834 GB-A- 2 004 927
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DE-A- 3 613 364 FR-A- 2 193 333 GB-A- 1 547 367 GB-A- 2 078 803
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Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
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[0001] The present invention relates to a machine for dyeing fabric gathered into a rope
and sewn into a loop.
[0002] More precisely, the invention relates to a machine according to the pre-characterising
part of claim 1, which is known from DE-A-3 613 364.
[0003] DE-A-3 613 364 shows a machine having a tank for holding the dye bath, a nozzle for
soaking the fabric and entraining it hydraulically and a tube downstream of the dyeing
nozzle for transporting the rope hydraulically. The rope of fabric collects in an
orderly series of folds at the outlet of the dyeing tube and is raised by a single
motor driven roller at the end of the machine opposite to the outlet of the dyeing
tube. Said machine includes a stationary guiding element located upstream of the lifting
roller and urging the rope of fabric in a direction such that the rope passes around
a larger angular portion of the lifting roller.
[0004] A problem of the machine according to DE-A-3 613 364 is that various types of fabric
have been found to be unsuitable for dyeing in rope form in this kind of machines,
because of their tendency to form permanent creases. In fact, in this known machine
it is possible that some creases form always in the same position in the fabric as
it passes repeatedly on the lifting roller, in the nozzle and in the dyeing tube.
At the end of the dyeing process, some types of fabric - especially delicate or light
fabrics - may be permanently damaged by marks produced by the creases.
[0005] The problem of the tendency of the material to crease during a dyeing process in
rope form has already been confronted by FR-A-2 193 333. This document shows a dyeing
machine provided with an air nozzle which swells the fabric upstream of a lifting
roller. The air nozzle forms the fabric into a sort of balloon in order to prevent
the creases from always forming in the same position in the fabric. The flow of air
is directed from inside to outside of the loop of rope and to maintain the rope in
frictional contact with the lifting roller, the machine is provided with a second
roller which is biassed by a spring toward the lifting roller.
[0006] The machine according to FR-A-2 193 333 does not overcome the problem of damages
to delicate fabrics. In fact, while the air nozzle is effective in preventing the
creases to form always in the same position, the entraining of the rope is effected
by compressing the rope between two rollers. Such compression of the rope could still
produce damages of delicate fabrics.
[0007] The object of the present invention is to provide a dyeing machine which can dye
in rope form also types of fabrics which, because of their tendency to crease, could
not be treated by conventional machines for dyeing ropes.
[0008] According to the present invention, this object is achieved by a dyeing machine according
to claim 1.
[0009] The machine according to the invention includes means for directing a flow of air
onto the rope from the outside to the inside of the loop of rope. The air flow inflates
the rope of fabric so that it opens out and closes up continually, thus changing the
position of the creases and preventing them from forming permanent marks.
[0010] Moreover, the air generates a transverse force on the rope of fabric which causes
it to pass around a larger angular portion of the roller so that positive entrainment
is maintained without slippage, without compressing the rope between a pair of rollers.
[0011] Another characteristic of the invention is that, when the machine is operating, the
fabric in the folding chamber is still above the level of the bath so that the machine
can operate with low bath ratios (about 1:5). In these conditions, moreover, the rope
of fabric is drained as it returns to the entrainment roller and is thus lighter and
opens out more easily under the effect of the air so as to optimise the essential
movement of the creases.
[0012] Further characteristics and advantages of the present invention will become clear
in the course of the detailed description which follows with reference to the appended
drawings, provided purely by way of non-limiting example, in which:
Figure 1 is a schematic, longitudinal section of a dyeing machine according to the
present invention,
Figure 2 is a section taken on the line II-II of Figure 1, and
Figure 3 is a view taken on the arrow III of Figure 1.
[0013] With reference to Figure 1, a dyeing machine, indicated 1, includes a tank 2 containing
the dye bath 4. In the upper portion of the tank 2 is a soaking, dyeing and hydraulic
entrainment nozzle 8 which is supplied with the dye bath 4 by means of a circulation
pump 10 and a pipe 12, and through which the rope 14 passes. Next to the nozzle 8
is a tube 6 for transporting the rope hydraulically to a folding chamber 16.
[0014] The rope of fabric 14 moves in the sense indicated by the arrow A. At the outlet
of the transportation tube 6, the fabric is deposited in the folding chamber 16 in
an orderly manner by a folding device constituted by a curved tube portion 6A which
is rotatable about the axis of the tube 6. The portion 6A is connected to a compressed-air
linear actuator (not shown) which causes the portion 6A to pivot to and fro about
its axis of rotation so that the the entire width of the folding chamber is filled.
[0015] The chamber 16 has a quadrangular cross-section the width of which increases in the
direction in which the fabric 14 moves. The base wall 18 of the folding chamber 16
is covered internally with self-lubricating material (for example teflon) to facilitate
the sliding of the fabric 14. The side walls 20 of the chamber 16 are perforated so
that the dye bath can drain out when the machine is operating with the dye-bath level
below the base wall 18 of the chamber 16.
[0016] A motor-driven roller, indicated 22, lifts the fabric 14 from the folding chamber
16 and sends it to the nozzle 8.
[0017] A fan 24 disposed inside the loop defined by the rope of fabric 14 draws air into
the tank 2 and sends it into an air duct 26. The duct 26 extends outwardly of the
loop of fabric 14, passes over the motor-driven roller 22 and ends in a diffusor 28
which lies between the outlet of the folding chamber 16 and the motor-driven roller
22 in a vertical plane parallel to the axis of rotation of the roller 22.
[0018] The air blown out of the diffusor 28 opens out and inflates the rope of fabric and
generates a force which moves it continually so as to achieve the main object of the
invention.
[0019] As can be seen in Figure 1, the level of the dye bath 4 is below the base wall 18
of the folding chamber 16 and the fabric 14 thus extends completely out of the dye
bath 4. The fabric 14 is thus dyed exclusively as a result of its contact with the
bath in the dyeing tube 16. Except for the blowing circuit, the same machine can operate
with a higher dye-bath level so that the fabric is partially or fully immersed.
[0020] It can be seen from Figure 2 that the machine 1 is constituted by a single tank 2
in which two entrainment and blowing circuits are arranged side by side and have a
single terminal diffusor 28. The end of the pipe 12 for supplying the bath has a manifold
30 for supplying the bath to the two dyeing nozzles 8.
[0021] The two fans 24 are operated by a single shaft 32 driven by a variable-speed motor
which enables the flow-rates and output pressures of the fans to be adjusted so that
the effect of the air can be adjusted according to the characteristics of the fabric.
[0022] As can be seen in Figure 1 in particular, a tube 34 extends from the air duct 26
immediately downstream of the outlet of the fan 24 and its free end has a nozzle 36
for directing a flow of air into the region between the rope 14 and the surface of
the lifting roller 22. The machine 1 has a nozzle 36 for each rope of fabric 14. Each
of the tubes 34 has a valve 38 for shutting off and adjusting the air flow directed
to the nozzle 36. The air-flows produced by the nozzles 36 create a cushion of air
between the fabric 14 and the lifting roller 22 thus achieving a much more delicate,
pneumatic entrainment of the rope 14 and avoiding the otherwise inevitable mechanical
action on the fabric when it is entrained in direct contact with the roller.
1. A machine for dyeing fabric gathered into a rope and sewn into a loop, including:
- a tank (2) for holding the dye bath (4),
- a nozzle (8) for soaking the fabric and entraining it hydraulically, the rope (14)
being dyed in the nozzle through which the fabric (14) being treated and a flow of
dye bath (4) are intended to pass,
- a tube (6) downstream of the dyeing nozzle (8) for transporting the rope hydraulically,
- a folding chamber (16) in which the rope of fabric (14) collects in an orderly series
of folds at the outlet of the dyeing tube (6),
- a motor-driven roller (22) for lifting the rope of fabric (14) which is supplied
to the dyeing tube (6), and
- means to urge the rope of fabric in a direction such that the rope passes around
a larger angular portion of the roller (22),
characterised in that said means provide a flow of air onto the rope of fabric (14)
upstream of the lifting roller (22), the flow of air being directed from the outside
to the inside of the loop of rope, so as to urge the rope of fabric in a direction
such that the rope (14) passes around a larger angular portion of the lifting roller
(22).
2. A machine according to Claim 1, characterised in that it includes a fan (24) disposed
inside the loop defined by the rope of fabric (14) being treated, the fan (24) being
connected to an air duct (26) which extends outwardly of the loop, and ends in a diffusor
(28) which blows inwardly of the loop.
3. A machine according to Claim 2, characterised in that the diffusor (28) on the air
duct (26) lies substantially in a vertical plane parallel to the axis of rotation
of the motor-driven roller (22).
4. A machine according to Claim 1, characterised in that it includes means for adjusting
the level of the dye bath in the tank (2) to enable the machine to operate with the
fabric completely above the level of the dye bath so that treatment takes place exclusively
by means of the nozzle (8), or with the fabric partially or fully immersed.
5. A machine according to Claim 1, characterised in that the tube (6) carries at its
outlet end of the rope (14) a folding device comprising a curved tube portion (6A)
which is rotatable on the end of the tube (6) and is connected to a linear actuator
which causes the curved portion (6A) to pivot to and fro about its axis of rotation.
6. A machine according to Claim 2, characterised in that a tube (34) extends from the
air duct (26) and carries a nozzle (36) for sending a flow of air into the region
between the rope of fabric (14) and the surface of the lifting roller (22).
7. A machine according to Claim 6, characterised in that a valve (38) is interposed in
the tube (34) for shutting off and adjusting the air flow sent to the nozzle (36).
1. Vorrichtung zum Färben von zu einem Strang zusammengefaßtem und zu einer Schleife
vernähtem Textilgut, mit:
- einem Tank (2) zur Aufnahme des Färbebades (4),
- einem Mündungsstück (8) zum Durchtränken und hydraulischen Einziehen des Textilgutes,
wobei der Strang (14) in dem Mündungsstück gefärbt wird, durch welches vorgesehen
ist, daß das behandelte Textilgut (14) sowie ein Strom von Färbebad (4) durchlaufen,
- einem Rohr (6) stromabwärts der Färbedüse (8), um den Strang hydraulisch zu transportieren,
- eine Faltkammer (16), in der sich der Strang von Textilgut (14) am Auslaß des Färberohres
(6) in einer geordneten Folge von Falten sammelt,
- eine von einem Motor angetriebene Rolle (22), um den dem Färberohr (6) zugeführten
Strang von Textilgut (14) hochzuheben, und
- eine Einrichtung, um den Strang von Textilgut in solch eine Richtung zu treiben,
daß der Strang einen größeren Umschlingungswinkel auf der Rolle (22) einnimmt;
dadurch gekennzeichnet, daß diese Einrichtung stromaufwärts der Heberolle (22) einen
Luftstrom auf den Strang von Textilgut (14) richtet, wobei der Luftstrom von der Außenseite
zur Innenseite der Schleife des Textilstranges gerichtet ist, um den Strang von Textilgut
in solch eine Richtung zu lenken, daß der Strang (14) auf der Heberolle (22) einen
größeren Umschlingungswinkel einnimmt.
2. Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, daß sie einen Ventilator (24)
enthält, der innerhalb der von dem behandelten Strang von Textilgut (14) beschriebenen
Schleife angeordnet ist, wobei der Ventilator (24) mit einem Luftkanal (26) verbunden
ist, der sich nach außerhalb der Schleife erstreckt und der in einem Diffusor (28)
endet, der nach innerhalb der Schleife bläst.
3. Vorrichtung gemäß Anspruch 2, dadurch gekennzeichnet, daß der Diffusor (28) am Luftkanal
(26) im wesentlichen in einer zur Rotationsachse der motorgetriebenen Rolle (22) parallelen
vertikalen Ebene liegt.
4. Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, daß sie eine Einrichtung zur
Einstellung des Standes des Färbebades im Tank (2) enthält, um einen Betrieb der Maschine
mit dem Textilgut völlig oberhalb des Spiegels des Färbebades, sodaß die Behandlung
ausschließlich mittels der Düse (8) erfolgt, oder mit teilweise oder vollkommen eingetauchtem
Textilgut zu ermöglichen.
5. Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, daß das Rohr (6) an seinem Auslaßende
des Stranges (14) eine Falteinrichtung trägt, welche ein gekrümmtes Rohrstück (6A)
aufweist, welches am Ende des Rohres (6) drehbar ist und mit einem linearen Betätigungsorgan
verbunden ist, welches bewirkt, daß das gekrümmte Rohrstück (6A) um seine Rotationsachse
vor und zurück schwenkt.
6. Vorrichtung gemäß Anspruch 2, dadurch gekennzeichnet, daß ein Rohr (34) von dem Luftkanal
(26) ausgeht und eine Düse (36) trägt, um einen Luftstrom in den Bereich zwischen
dem Strang von Textilgut (14) und der Oberfläche der Heberolle (22) einzubringen.
7. Vorrichtung gemäß Anspruch 6, dadurch gekennzeichnet, daß ein Ventil (38) in dem Rohr
(34) eingesetzt ist, um den zu der Düse (36) geschickten Luftstrom abzuschalten und
einzustellen.
1. Machine pour teindre un tissu collecté en une corde et cousu en une boucle, comprenant
:
- une cuve (2) pour contenir le bain de teinture (4),
- une buse (8) pour imprégner le tissu et l'entraîner de manière hydraulique, la corde
(14) étant teinte dans la buse à travers laquelle le tissu (14) en cours de traitement
et un écoulement de bain de teinture (4) doivent passer,
- un tube (6) en aval de la buse de teinture (8) pour transporter la corde hydrauliquement,
- une chambre de pliage (16) dans laquelle la corde de tissu (14) est collectée dans
une série ordonnée de plis au niveau de la sortie du tube de teinture (6),
- un rouleau (22) entraîné par un moteur pour lever la corde de tissu (14) qui est
fournie au tube de teinture (6) et des moyens pour pousser en force la corde de tissu
dans un sens tel que la corde passe autour d'une partie angulaire plus large du rouleau
de levage (22),
caractérisé en ce que lesdits moyens dirigent un écoulement d'air sur la corde de
tissu (14) en amont du rouleau de levage (22), l'écoulement d'air étant dirigé depuis
l'extérieur vers l'intérieur de la boucle de corde de manière à pousser en force la
corde de tissu dans un sens tel que la corde (14) passe autour d'une partie angulaire
plus large du rouleau de levage (22).
2. Machine selon la revendication 1, caractérisée en ce qu'elle comprend un ventilateur
(24) placé à l'intérieur de la boucle définie par la corde de tissu (24) traité, le
ventilateur (24) étant relié à une conduite d'air (26) qui s'étend vers l'extérieur
de la boucle, et se termine dans un diffuseur (28) qui souffle vers l'intérieur de
la boucle.
3. Machine selon la revendication 2, caractérisée en ce que le diffuseur (28) sur la
conduite d'air (26) se situe sensiblement dans un plan vertical parallèle à l'axe
de rotation du rouleau entraîné par un moteur (22).
4. Machine selon la revendication 1, caractérisée en ce qu'elle comprend des moyens pour
régler le niveau du bain de teinture dans la cuve (2) pour permettre à la machine
de fonctionner avec le tissu complètement au-dessus du niveau du bain de teinture
de sorte que le traitement s'effectue exclusivement au moyen de la buse (8), ou avec
le tissu partiellement ou totalement immergé.
5. Machine selon la revendication 1, caractérisée en ce que le tube (6) supporte au niveau
de son extrémité de sortie de la corde (14) un dispositif de pliage comprenant une
partie de tube incurvée (6A) qui peut tourner sur l'extrémité du tube (6) et est reliée
à un dispositif d'actionnement linéaire qui provoque le pivotement de la partie incurvée
(6A) selon un mouvement de va-et-vient autour de son axe de rotation.
6. Machine selon la revendication 2, caractérisée en ce qu'un tube (34) s'étend à partir
de la conduite d'air (26) et supporte une buse (36) pour envoyer un écoulement d'air
dans la zone comprise entre la corde de tissu (14) et la surface du rouleau de levage
(22).
7. Machine selon la revendication 6, caractérisée en ce qu'une valve (38) est interposée
dans le tube (34) pour arrêter et régler l'écoulement d'air envoyé dans la buse (36).