EP0764222B1 - Intermediate storage device - Google Patents

Description

The invention relates to a device and a method for discharging and Collecting those arising during the processing of a textile machine Waste material (e.g. fibers, shell parts, dust, etc.) according to the generic term of claim 1 or the preamble of method claim 21.

In practice, various solutions are known, the most common Components such as combed short fibers (noils) from the Combing heads of the combing machine via a suction device to a memory be fed. Such an arrangement is for example from the CH-PS 503 126 can be seen, the material sucked off by a blower a separator in the form of a rotating drum is supplied. The material accumulating on the drum becomes the main conveying air flow separated and compacted into a fiber layer.

This fiber layer is then assigned by a suitable location Extracted suction channel and via a transport channel to a Departure collection station funded. The outgoing collection station can also from a bag made of air-permeable material, which is the effect of a filter and can be replaced when filled. The means that the present solution includes an isolated solution for waste disposal for a single combing machine.

A similar solution can also be found, for example, in US Pat. No. 1,613,672 remove.

JP-AS-3-33 805 is a system with a large number of combing machines can be seen, the exit (noils, dust, nits, etc.) over a central suction system is made. The individual combing machines suction devices for the waste material to be discharged are assigned, which can be connected to a common discharge line via switching valves. This main line leads to several via a main valve Collection facilities. In the suction device shown on the Combing machine is probably a kind of buffer. The The system is switched so that the output from the combers Disposal material by material type in the corresponding main store can be supplied. That means for the removal of the material to one certain material stores are consequently only the valves on the Combing machines opened one after the other, which are of the same material to process. Before combing with another type of material the manifold is drained over a specified period of time and then the main valve is switched to the other total storage. With This facility is intended to prevent the waste material of the Combing machines of different material templates is mixed together. Since the combs of the waste material also become textile goods can be processed further is a sorting of these noils in relation on the finishing process necessary. About the type and the execution of the buffer on the combing machine indicated here is here nothing specified. It can only be seen from FIG. 3 that the buffer from a extending along the combing machine There is a shaft at which a suction pipe opens in the middle, via a valve is connected to the common delivery line. The levy of the Drum 1 in the buffer B can be according to the Embodiment take place according to CH-PS 503 126. From the cross section of the buffer and its longitudinal extent can be seen that it has a very large volume. This means that when you open the Valve C a large amount of air must be moved to the in the memory B Vacuum accumulated waste (noils). On the one hand, this requires one high suction power and probably leads to an uncontrolled air flow within the cache.

It is an object of the invention to provide a device for removing and Collecting those arising during the processing of a textile machine Propose exit material, which on the one hand is simple and inexpensive is executed and on the other hand an optimal feed and trouble-free Removal of waste material possible with low power requirements.

This is solved on the one hand by the fact that the memory, which of a Outlet separator the outlet material is supplied, tubular is formed and one that opens between its end portions Has inlet opening (16), which is provided with a blocking element (24) Outlet opening (22) is assigned, wherein the outlet opening - in the longitudinal direction seen of the memory - is mounted at a distance from the inlet opening and the memory on a partial area (L1) of its longitudinal extent with a air-permeable section (19) is provided.

It is also suggested that at least half of the air-permeable section outside the distance range (M) between the inlet and outlet opening.

To assist the emptying process through the outlet opening further suggested that at least half of the area between the Inlet and outlet openings with an airtight section is provided. In this area is the intake of bypass air prevented.

Means can be provided in the area of the air-permeable section which prevent air from entering the storage space through this zone when a negative pressure is applied in the storage space. These means can preferably consist of an air-impermeable cover sheet attached to the periphery of the storage jacket on one side. On the one hand, this enables the cover sheet to be flexibly evaded when the storage tank is being filled, whereby the transport air that is carried diffuses outward through the air-permeable area and, on the other hand, the system on the storage jacket for covering and thus preventing the supply of ambient air (external air) during the emptying process if there is a negative pressure in the Memory is built. The cover sheet can be made of plasticized fabric. A plurality of cover sheets are preferably fastened side by side in the manner of a skirt on the circumference of the store. This creates a completely closed partition when an underpressure is created in the accumulator. The longitudinal axis of the store is preferably oriented vertically and the free ends of the cover sheets point downward.
Furthermore, a device is proposed in which the air-permeable section begins at a distance x - seen in the longitudinal direction of the store - following the inlet opening, the distance x being in a range between zero and the measure of 1/3 of the total length of the store . The air-permeable section is between the inlet and the
Outlet opening arranged and allows good air discharge during the filling process. This means that the buffer can be filled optimally.

The area of the air-permeable section can be between 10 and 60% of the Amount surface of the memory. There are also design variants possible, but the air-permeable surface is not necessarily in one piece must be trained.

To suck too much during the suction process with the blocking element open To avoid foreign air through the air-permeable section suggested that the length of the air-permeable section less than Is 60% of the total length of the memory.

The air-permeable section is preferably formed from a filter cloth.

To increase the suction effect, or the speed of the Conveying air flow is also proposed that the memory in the area Outlet opening is provided with a conical section, which is in Tapered towards the outlet end and a connection for an exhaust pipe forms.

The cross section of the memory is preferably circular.

It is further suggested that the diameter ratio between the Diameter of the storage and the suction pipe between 3: 1 and 1: 1 can be. It must be chosen so that the emptying of the Memory can be done.

To utilize the full storage capacity of the memory and Prevention of the formation of air cushions in the area of the outlet opening blocked exhaust valve, it is also proposed that the memory in the Area of the outlet opening with at least one air-permeable zone is provided, which is arranged at a distance from the inlet opening, which is arranged at a distance from the inlet opening that is greater than 2/3 of the Total length of the memory is. In addition, in the area of Outlet opening means may be provided which in the application of a negative pressure Storage space means that air enters the storage space through this zone prevent. The air-permeable section is preferably made of one Filter cloth formed.

For uniform filling of the memory, it is proposed that the Inlet opening opens into the circumference of the storage jacket. However, it is also another solution conceivable where the inlet opening in the axial direction of the Memory opens into the memory.

A particularly compact and space-saving disposal facility achieved when the upstream of the memory Outlet separator is tubular, with its longitudinal axis is aligned approximately parallel to the longitudinal axis of the memory. It is advantageous, the longitudinal axis of the memory or the outlet separating device to align approximately vertically on the textile machine.

The proposed devices make it possible to carry out a claimed method, the separated waste material being fed to an intermediate store and then being transferred in stages to a common collection point.
Further advantages and features are shown and described using an exemplary embodiment described below.

Fig. 1

eine schematische Seitenansicht einer Kämmaschine mit einer Abgangssepariereinrichtung und einem erfindungsgemäss ausgebildeten Speicher,

Fig. 2

eine vergrösserte Darstellung des Speichers nach Fig. 1,

Fig. 3

eine vergrösserte Darstellung der Anbringung der Abdeckbahn nach Fig. 2-Ansicht X

Fig. 4

eine vergrösserte Darstellung eines weiteren Ausführungsbeispieles eines Speichers nach Fig. 1

Fig. 5

eine vergrösserte Darstellung einer Bypassöffnung nach Fig. 4

Fig. 6

eine schematische Darstellung einer bekannten Entsorgungsanlage mit einer Zentralabsaugung,

Fig. 7

ein Diagramm Fördermenge Luft/Zeiteinheit nach Fig. 6

Fig. 8

ein Diagramm des Durchmesserverlaufs der Entsorgungsleitung in bezug auf die Anzahl der Kämmaschinen nach Fig. 6,

Fig. 9

eine schematische Darstellung einer Entsorgungsanlage mit den erfindungsgemässen Zwischenspeichern,

Fig. 10

ein Diagramm Fördermenge Luft/Zeiteinheit in bezug auf das intermittierende Leeren der Speicher nach Fig. 9

Fig. 11

ein Diagramm des Durchmesserverlaufs innerhalb der Entsorgungsanlage nach Fig. 9.

Show it:

Fig. 1

2 shows a schematic side view of a combing machine with an outlet separating device and an accumulator designed according to the invention,

Fig. 2

2 shows an enlarged illustration of the memory according to FIG. 1,

Fig. 3

an enlarged view of the attachment of the cover sheet according to FIG. 2 view X

Fig. 4

2 shows an enlarged illustration of a further exemplary embodiment of a memory according to FIG. 1

Fig. 5

3 shows an enlarged illustration of a bypass opening according to FIG. 4

Fig. 6

1 shows a schematic representation of a known disposal system with a central suction,

Fig. 7

6 shows a diagram of the delivery rate air / time unit according to FIG. 6

Fig. 8

6 shows a diagram of the course of the diameter of the disposal line in relation to the number of combing machines according to FIG. 6,

Fig. 9

1 shows a schematic illustration of a disposal system with the intermediate stores according to the invention,

Fig. 10

9 shows a diagram of the delivery rate for air / time unit in relation to the intermittent emptying of the stores according to FIG

Fig. 11

9 shows a diagram of the course of the diameter within the disposal system according to FIG. 9.

A combing machine K1 is shown in FIG. 1, which has eight combing heads 2 is provided. For each combing head 2, a cotton roll 3 is placed, which is for the Combing unrolled and a pliers unit, not shown Combing is fed. Such a pliers unit and the means for Combing the cotton wool or pulling off the combed cotton wool end shown and described in EP-A1-564 408. It will therefore not get any closer here dealt with it.

The components separated during the combing process, such as Example combs pass through schematically illustrated suction shafts 5 in a manifold 6. By a fan 8, which drives the motor 9, the deposited material in a conical filter part 10 a Waste separator 11 transferred. The filter part 10 is air-permeable Knitwear formed, whereby the waste material (noils) from most of the transport air (90%) is separated. This severed Transport air (90%) can enter the ambient air through an outlet part 12 Spinning mill to be given. The outlet part 12 is additionally with a Provide an air filter to retain the dust particles that pass through the filter 10 have penetrated.

However, it is also possible to connect this outlet part 12 to a central filter system connect in which the residual dust contained in the air mixture is separated before this air is returned to the environment.

The conical filter part 10 is at its tapered end with an outlet pipe 14 provided, which the leaving material with about 10% of the remaining Transport air supplies a tubular buffer 15.

The vertical arrangement of the filter part 10 in connection with a flexible filter cloth, the filter part is essentially self-cleaning.

A more detailed description and illustration of the waste separating device 11 can also from the embodiment and the associated Description of CH-PS 624 155 can be taken.

The inlet opening 16 of the outlet pipe 14 opens in the example shown approximately in the middle of the intermediate storage 15 in its peripheral jacket 17. This can in particular also be taken from FIG. 2, the Buffer is shown enlarged. Is below the inlet opening 16 the intermediate store 15 is provided with an air-permeable screen jacket 19, which extends downward approximately at the height of the inlet opening. The sieve jacket 19 can be formed from an air-permeable filter cloth. The length L1 of the screen jacket 19 extends over less than the total length L of Buffer 15.

When using a filter cloth for the screen jacket 19 can in Longitudinally aligned support rods 20 for the attachment of the filter cloth to be appropriate.

A variant is also possible, the screen surface of the screen jacket 19 does not consist of a closed screen surface, but of several Individual screen surfaces, which are arranged accordingly on the circumference of the store are.

At the outlet opening 22 is a tube 23 for the discontinuous discharge of the attached waste material stored in the intermediate storage 15. By doing Tube 23 is attached to a pivotable flap 24, which over a Adjustment element 25 can be moved into the "open" or "closed" position. In the illustration shown, the flap 24 is in the "closed" position, that means that the discharge from the intermediate storage 15 is blocked.

The adjusting element 25 can be, for example, a pneumatically operated one Cylinder or an electric motor exist. The outlet opening 22 is on tapered end of a conical part 27, which on the cylindrical Part 28 of the buffer 15 connects. At the end of the cylindrical part 28 before the transition into the conical part 27 can be distributed around the circumference Bypass openings 30 may be provided. The bypass openings are in front of the Transition arranged in the conical part 27. It can be a or several bypass openings. The individual bypass opening 30 is with an air-permeable filter 31 (e.g. a filter cloth), which the Passage of air, but not the passage of parts of the waste material A enables. On the outer jacket 17 of the buffer 15 is in A flexible cover 32 is attached to the area of the bypass openings 30, which is pivotally attached at least on one side and with complete installation the outer jacket 17 (as shown) covers the bypass opening. In this situation prevents ambient air from being sucked off via the pipe 23 can be sucked through the bypass openings 30. The dashed drawn position of the flexible cover then arises when over the Outlet pipe 14 of the intermediate store 15 is filled when the flap 24 is closed becomes. Since a during the filling process against the closed flap 24 Overpressure in room R above the outgoing material builds up to the ambient air, the flexible cover 32 is after pressed outside. On the one hand, this can cause the overpressure in room R dismantle and on the other hand allows the complete filling of the Buffer 15.

The conical jacket 27 leads to an increase in the transport speed the transport air during the suction process up to the outlet opening 22. The pipe 23 opens into a collecting pipe 35, in which further disposal pipes from other combing machines or textile machines open. To generate the Transport air for the suction process from the intermediate storage 15 is in the Bus 35 integrates a blower 36, which is the waste material feeds a fiber comparator 37. In the fiber comparator 37 there is another Separation between the transport air and the carried waste carried out. In the example shown, the waste material essentially consists of short fibers, or noils, in compressed form from the fiber separator 27 are given down into a suitable container 38. That so Collected fiber goods can be packed for the purpose of further transport to subsequent processing stages for this fiber material. However, it is conceivable that this fiber material (noils) directly and without packaging in the same spinning plant fed to a suitable processing process becomes.

To the cross sections of the manifold and thus also the power requirements of the Keeping the blower 36 at an economically reasonable level will be the individual buffer of several combing machines not at the same time but emptied in a predetermined order. Controlling this intermittent emptying process is carried out by a control unit 40 controlled, which on the one hand via line 43 (43 ', 43 ", 43"') with the controller the respective combing machine is connected. At the same time, the control unit 40 via line 44 with fiber comparator 37 and via line 45 with connected to the blower 36. The respective adjustment elements 25 for the flaps 24 are controlled via line 47 (47 ', 47 ", 47"').

To ensure that the waste material A can be easily removed from the To ensure buffer 15, the diameter B of the cylindrical part 28 chosen so that it is twice the diameter D of the suction tube 23 does not exceed. For certain applications A diameter ratio B / D is also possible (depending on the material) than 2: 1 (e.g. 3: 1). This is to prevent, in particular, Area of the cone part 27 comes to blockages. To suck in External air in the suction process via the pipe 23 through the screen jacket 19 limit, it is proposed that the longitudinal extent L1 of the screen jacket 19 accounts for less than 60% of the total length L of the buffer. Due to the flexible cover sheets in the area of the Sieve jacket is created when creating a vacuum during the emptying process the supply of external air is prevented in this area and thus the necessary air flow for emptying generated. During the filling process dodge the cover sheets to the outside and the outlet of the transport air enable. This allows the store to be almost entirely filled with waste material can be filled without the formation of annoying air posters. This trouble-free Filling process can be done by attaching the one already described Bypass openings 30 are still supported. The course of the The disposal process is described in more detail below: That from the individual combing heads 2 down through the suction shafts 5 discharged material enters through the suction effect of the blower 8 Collecting tube 6. The flap 24 in the sampling tube 23 is closed. The Blower 8 transports the waste material delivered through the collecting tube 6 into the conical filter part 10 of the waste separating device 11 Most of the waste material separated from the transport air gets under the Action of about 10% residual transport air through the inlet opening 16 parallel to the waste separator 11 vertically erected buffer 15. Due to the ongoing tracking of further waste material in the Intermediate stores compressed goods and the enclosed Transport air discharged to the outside through the openings of the screen jacket 19 and removed. By adding waste material using the Transport air creates an overpressure within the accumulator which causes the free Ends of the cover sheets - are pressed outwards and thus the enable unimpeded escape of the conveyed transport air. By the continuous filling process, the residual space R within the Continuous cache. A pressure increase in the R Air volume can be avoided by the fact that the air can escape through the arranged bypass openings. This makes it possible to fill the To perform buffer 15 before emptying is carried out.

The emptying can be triggered on the one hand by a preselected time cycle be, or by responding to a filling level sensor, which on Buffer can be arranged at the appropriate height. In the latter Case must also be considered that the emptying interval of several combing machines must be coordinated. This means, based on the design of the pipe system or the blower can either Only one or only a limited number of combing machines be disposed of simultaneously from the contents of the buffer. That is, at Attachment of a level sensor would have to respond after this sensor there is still enough free space in the buffer to accommodate the To enable compliance with a predetermined emptying concept.

The emptying process itself, as already described, corresponds to the Emptying sequence triggered by the control unit 40. That means that Adjustment element 25 is activated and opens the flap 24. The fan 36, this also via the connection 45 with the control unit 40 is connected in terms of control, is usually in operation. By the now in the tube 23 negative pressure that is in the buffer 15th located waste A of the manifold 35 fed and to one Fiber comparator 37 issued. This in turn gives the compressed Fibers down to a suitable container 38. As soon as after opening the flap 24 creates a negative pressure in the room R, the flexible Covers 32 and the cover sheets on the peripheral jacket 17 of the Cylinder part 28 pressed and thus prevent the entry of external air in this area. I.e. the air flow required for suction can be in be initiated in an optimal manner. During the suction process, the Work process on the comber is not interrupted, it is continuously waste material via the blower 8 in the buffer delivered later. However, this subsequent quantity is much smaller than that Quantity withdrawn during the suction process. That is, after a certain one Time is almost completely empty. This time interval for the Emptying process is usually predetermined or could also be under With the help of level sensors arranged in the buffer be determined.

4 shows a further exemplary embodiment of a buffer store 15.1 remove which instead of the buffer shown in Fig. 1 and 2 15 can be used. For reasons of clarity, the same components of both memory designs (15, 15.1) same Reference numerals used.

The inlet opening 16 of the outlet pipe 14 is in the lower part of the store 15.1 arranged in its peripheral jacket 17. Above the entrance opening and with a short distance x is the intermediate store 15.1 with a air-permeable screen jacket 19 provided. The sieve jacket that consists of one air-permeable filter cloth can be formed extends over less than half the total length L of the buffer 15.1 with the length L1.

In the area of the screen jacket 19 can also be aligned in the longitudinal direction Support rods 20 may be attached for the attachment of the filter cloth.

5 shows an enlarged illustration of the bypass opening 30, which already according to the exemplary embodiment of the buffer store 15 Fig. 2 has been described. The functional processes during the Filling process of the buffer store 15.1 are in accordance with the Processes which have already been described in the exemplary embodiment according to FIG. 2. In contrast to the execution of the buffer 15.1 Intermediate store 15 no cover of the screen jacket 19 is provided because this is above the inlet opening and the problem of a wrong air supply is not as problematic during the emptying process as with the buffer 15. The advantages of the buffer store 15 compared to the buffer store 15.1 lies in the fact that the delivery of waste material does not violate the Weight of the entire content of those in the buffer Mass must be delivered.

Both versions of the buffer 15 and 15.1 have their Advantages and lead to an advantageous disposal solution for the outlet or the noils. The further explanation of the benefits of Disposal device in the form of a buffer is based on the Buffer 15 performed.

Through the appropriate arrangement and design of the buffer targeted removal of the waste material is possible, with the effort to be expended as well as the required transport facilities can be kept at an optimal level.

To the differences of a known waste disposal system for the noils a group of combing machines compared to a system with the The systems in Fig. 6 to Fig. 11 explained in more detail. 6 to 8 represent the known one Execution of a disposal system, while Fig. 9 to Fig. 11 Disposal location shows in which the claimed according to the invention Buffer is integrated.

6 shows a series of combing machines K1 to K4 lying side by side, of which in each case via a line 50 the accumulating during the combing process and separated combs and other contaminants Disposal system. The delivery takes place continuously.

The material delivered by the combing machine K1 is transferred into the tube E1 with the diameter D1. This material is transferred with the application of a suction air flow through the blower 51 to a pipeline E2, into which the waste material of the combing machine K2 is introduced via a further pipe 50. Due to the now increased discharge quantity, the diameter D2 of the tube E2 is larger than the diameter D1 of the tube E1. The waste material now in tube E2 is transferred to a subsequent tube E3 and then to a tube E4, from which it is transferred via the blower 51 to a separator 53. The waste material of the combing machine K3 or K4 is introduced into the tube E3 or E4. Due to the gradually increasing amount of waste, the diameter D2 of the tube E3 or D4 of the tube E4 is chosen to be larger than that of the conveyor tubes E1 or E2 located upstream. As a result of the continuous discharge of the waste material, the diameter D4 of the pipe E4 must be chosen to be relatively large in order to ensure the continuous delivery. It can be seen from the diagram in FIG. 7 that a relatively high air delivery rate of 0.8 m ³ per second is necessary during disposal in order to ensure the removal of the continuously delivered goods. In Fig. 8, the diameter jump of the tube diameter, which is necessary on the following combing machine, can be seen again schematically.

Fig. 9 shows a device with the claimed according to the invention Buffer 15, which each of the successive combing machines K1-K4 is assigned. Each of these stores 15, as already described, via a tube 23 after opening the flap 24, the collected waste material (Kämmlinge) from a subsequent manifold 35, via which the good is fed to a fiber comparator 37 via a blower 36. The flaps 24 are, as already described, by control via the control unit 40 open at predetermined intervals. The control system is designed so that only one flap 24 of the combing machines K1-K4 flow is switched.

This ensures that the connecting manifold 35 receiving the waste material is always supplied with a predetermined amount of the waste material. The diameter Dx of the collecting tube 35 can be chosen to be constant and relatively small on the basis of the constant delivery quantity. The disposal cycle staggered over time at the individual combing machines K1-K4 is shown schematically in FIG. It can be seen from this that the required air flow rate is reduced to 0.5 m ³ / sec compared to the embodiment according to FIG. 7. The hatched area P between the individual disposal cycles shows the time interval in which all the flaps 24 are closed. This is, for example, the period in which one of the flaps 24 is closed and another flap 24 is opened.

Fig. 11 shows schematically the constant diameter Dx with respect to the sequential combing machines K1-K4.

By attaching buffers designed according to the invention it is possible for the disposal of the Waste material and constant cross-section of the waste disposal line to operate a large number of machines through the disposal system.

In contrast, the conventional conventional continuous Dissipation to the cross sections of the disposal lines, which also a large air volume for disposal and thus a high power requirement is needed.

Claims (21)

1. An apparatus for discharging and collecting waste material (e.g. fibres, trash particles, dust, etc.) occurring during the processing operation in a textile machine (1), with the waste material (A) supplied by one or several processing places (2) of the textile machine (1) being delivered to a waste material separating device (11) under the influence of a conveying air stream produced by a blower (8), from which device the waste material separated from the conveying air stream is transferred to a storage (15, 15.1), characterized in that the storage (15, 15.1) is arranged in a tube-like manner and is provided with an inlet opening (16) which opens out between its end sections and to which an outlet opening (22) is allocated which is provided with a locking element (24), with the outlet opening - as seen in the longitudinal direction of the storage - being attached at a distance from the inlet opening and the storage being provided with an air-permeable section (19) on a partial section (L1) of its longitudinal extension.
2. An apparatus as claimed in claim 1, characterized in that at least half of the air-permeable section (19) is located outside of the distance zone (M) between inlet and outlet opening.
3. An apparatus as claimed in claim 1, characterized in that at least half the distance zone (M) between the inlet opening (16) and the outlet opening (22) is provided with an air-impermeable section (58).
4. An apparatus as claimed in one of the claims 1 to 3, characterized in that means (55) are provided on at least a partial zone of the air-permeable section (19) which on applying a pressure below atmospheric in the storage chamber (R) of the storage (15) prevent a penetration of air from the ambient environment of the storage (15) into the storage chamber (R) through the partial section which is covered by the means.
5. An apparatus as claimed in claim 4, characterized in that the means are formed by at least one air-impermeable cover web (55) which is attached on one side on the circumference of the storage envelope (17).
6. An apparatus as claimed in claim 5, characterized in that the cover web (55) is made from plastified fabric.
7. An apparatus as claimed in one of the claims 4 to 6, characterized in that several cover webs (55), as seen in the circumferential direction of the storage envelope (17), are attached adjacent to one another in an apron-like manner on the storage envelope.
8. An apparatus as claimed in one of the claims 5 to 7, characterized in that the longitudinal axis of the storage (15) is aligned vertically and the free ends of the cover webs face downwardly.
9. An apparatus as claimed in claim 1, characterized in that the air-permeable section (19) begins, as seen in the longitudinal direction of the storage (15.1), at a distance (x) following the inlet opening (16), with the distance (x) being in a range between zero and the amount of 1/3 of the entire length (L) of the storage (15).
10. An apparatus as claimed in one of the claims 1 to 9, characterized in that the area of the air-permeable section (19) is between 10 and 60 % of the envelope area of the storage (15, 15.1).
11. An apparatus as claimed in one of the claims 1 to 10, characterized in that the length (L1) of the air-permeable section (19) is less than 60 % of the overall length (L) of the storage (15, 15.1).
12. An apparatus as claimed in one of the claims 1 to 11, characterized in that the air-permeable section (19) is formed by a filter cloth.
13. An apparatus as claimed in one of the claims 1 to 12, characterized in that the outlet opening (22) opens out into a conically tapered end part (27) in the longitudinal direction of the storage (15).
14. An apparatus as claimed in claim 13, characterized in that the ratio between the diameter (B) of the cylindrically arranged storage (15, 15.1) to the diameter (D) of the suction tube (23) allocated to the suction opening (22) is between 3:1 and 1:1.
15. An apparatus as claimed in one of the claims 1 to 3, characterized in that the storage (15, 15.1) is provided in the zone of the outlet opening (22) with at least one further air-permeable zone (30) which is arranged at a distance from the outlet opening (16) which is smaller than the distance (X1) from the inlet opening (16).
16. An apparatus as claimed in claim 15, characterized in that means (32) are attached in the zone of the outlet opening (22) which on applying a pressure below atmospheric in the storage chamber (R) prevent a penetration of air into the storage chamber (R) through this zone.
17. An apparatus as claimed in one of the claims 1 to 16, characterized in that the cross section of the storage (15, 15.1) is arranged circularly.
18. An apparatus as claimed in one of the claims 1 to 17, characterized in that the inlet opening (16) opens out into the circumference of the storage envelope (17).
19. An apparatus as claimed in one of the claims 1 to 18, characterized in that the waste material separating device (11) disposed upstream of the storage (15, 15.1) is arranged tube-like and its longitudinal axis is aligned approximately parallel to the longitudinal axis of the storage (15).
20. An apparatus as claimed in claim 19, characterized in that the storage (15, 15.1) and the waste material separating device (11) are arranged in the textile machine (1) with approximately vertically aligned longitudinal axes.
21. A method for discharging and collecting, under the influence of a conveying air stream, waste material (e.g. fibres, trash particles, dust) occurring in several textile machines (K1 to K4) simultaneously during the processing operation, characterized by the following process steps:

    Separation of the waste material from the conveying air stream in each textile machine;

    transfer to and storage of the separated waste material in an intermediate storage (15, 15.1) in each textile machine (K1 to K4);

    successive time-staggered discharge of the waste material from the respective intermediate storages (15, 15.1) of the textile machines (K1 to K4) to a common collecting place (37).

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