Patent Publication Number: US-2011067214-A1

Title: Injector for a textile processing machine

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present application claims the priority of European Patent Application No. 09 012 009.8, filed Sep. 22, 2009, the subject matter of which, in its entirety, is incorporated herein by reference. 
     BACKGROUND OF THE INVENTION 
     The invention relates to an injector for a textile processing machine. The injector comprises an inflow chamber that is in fluid communication or can be in fluid communication with a pressure source. The pressurized fluid or gaseous medium, preferably water, of the inflow chamber is further conveyed to a pressure distribution chamber via at least one communicating channel and, in particular, via several communicating channels. The pressure distribution chamber is in fluid communication with an exit opening. Between the pressure distribution chamber and the exit opening, there is a receptacle for a strip-shaped nozzle foil, for a nozzle strip. The nozzle foil has a plurality of nozzle openings which, with the nozzle foil installed in said receptacle, provide fluid communication between the pressure distribution chamber and the exit opening. The nozzle openings are disposed to form fine, needle-like jets of the medium, whereby said jets can be ejected through the exit opening by the injector. With the help of the jets, a random fiber non-woven is compacted to produce a fleece material. When in use, a water jet compacting system may comprise several injectors arranged either successively in series or radially around a drum. The series arrangement involves a web abutment; the arrangement around a drum involves a drum abutment. It is also possible to combine the drum abutment and the web abutment in one water jet compacting system. 
     It has been found that jets—in particular water jets—of varying quality may be formed, depending on the inflow conditions of the nozzle openings in the pressure distribution chamber. If the flow to the nozzle opening through the communicating channel and the pressure distribution chamber is straight, the resultant water jet is more compact and more stable in view of its needle-like form. Different therefrom, nozzle openings over which turbulent currents form in the pressure distribution chamber produce more diffuse water jets. These differences between the water jets result in different densities in the random fiber non-woven, so that it is not possible to produce a fleece material displaying uniform strength and density. 
     In order to eliminate this problem, DE 600 11 900 T2 suggests that the communicating channel be configured as a slit channel, in which case the flow to the nozzle openings in alignment with the slit channel can be both straight and direct, and essentially turbulence-free. In order to ensure this, the flow conditions in the region of the input orifice of the slit channel must be equalized along the length of the slit channel; to accomplish this, a perforated tube is arranged in the inflow chamber, said tube being disposed to distribute—in the inflow chamber—the water supplied by the pressure source. 
     An injector has been known from DE 10 2005 055 939 B3, said injector comprising an impact element in the form of a cylinder in the pressure distribution chamber below the output orifices of the communicating channels in order to avoid a direct flow to some of the nozzle openings. In doing so, the water flowing out of the communicating channels first impinges on the impact element and flows around said element before reaching the nozzle openings. 
     Considering this, the object of the present invention may be viewed as providing an injector that does not require additional flow-conveying components in the inflow chamber or in the pressure distribution chamber and still ensures a uniform water jet formation. 
     SUMMARY OF THE INVENTION 
     The above object generally is achieved with an injector in accordance with the invention wherein the flow path of the medium between the inflow chamber and the nozzle openings is defined by the at least one communicating channel, as well as by the pressure distribution chamber. Considering the injector in accordance with the invention, this flow path is prespecified by the course of the communicating channel and/or the pressure distribution chamber in that said flow path contains at least one deflecting site that is represented by a section of the communicating channel and/or of the pressure distribution channel. A deflecting site comprises the entire surface of a region, i.e., a wall section of the communicating channel and/or of the pressure distribution chamber. At this first deflecting site, the direction of flow of the medium, preferably of the water, is changed before said medium reaches the nozzle openings of the nozzle strip or nozzle foil. In this manner, it is ensured that a straight, direct flow of the medium flowing out of the inflow chamber is not possible at any of the nozzle openings. The flow conditions at the nozzle openings are equalized, thereby avoiding difference between the jets that lead to differences with regard to the quality and the density of the produced fleece material. It is not necessary to arrange flow-influencing components in the inflow chamber or in the pressure distribution chamber. Consequently, the two chambers may have smaller dimensions, so that the wall surface of the chambers is smaller. The pressure of the medium acting on a smaller wall surface reduces the deformation force exerted on the injector, so that the wall thicknesses of the injector may be reduced. This makes it possible for the exterior shape of the injector to be adapted to the changed requirements. Consequently, it is possible, for example, for the injector to have a conical exterior form. In this case, it has a smaller width in the region of the nozzle openings than in the region of the inflow chamber. With a radial arrangement of several injectors around a vacuum drum this enables an arrangement of the injectors more closely next to each other than in the case of a rectangular embodiment of the injector. Furthermore, this also facilitates the maintenance of the injector, for example, when cleaning the chambers that do not contain any components. 
     Advantageously, the communicating channel between the input orifice in the inflow chamber and the output orifice in the pressure distribution chamber enables a straight flow. For example, the communicating channel may consist of a cylindrical bore. As a result of this, it is possible to easily create the at least one communicating channel. In particular, several communicating channels are provided at regular distances in longitudinal direction between the inflow chamber and the pressure distribution chamber. 
     Preferably, the communicating channel or the communicating channels extend outside a longitudinal center plane extending in longitudinal direction centrally through the output orifice and—with the nozzle foil installed in the injector—through the nozzle foil. The communicating channel or channels do not intersect this longitudinal center plane. Considering this arrangement of the communicating channel, the input orifice of said communicating channel, viewed in section, represents a radius. 
     If several communicating channels are provided, at least one of the communicating channels may be arranged at a distance from the longitudinal center plane on both sides of the longitudinal center plane through the exit opening. In other words: the longitudinal center plane through the exit opening divides the injector into two parts, whereby at least one communicating channel is provided in both parts. In this manner, water can flow from different and, for example, opposite directions into the pressure distribution chamber. The streams of water conveyed in from different communicating channels and displaying different inflow directions can either be directly pointed at each other or be introduced, in longitudinal direction offset with respect to each other, into the pressure distribution chamber. Both measures are suitable to produce highly uniform flow conditions in the pressure distribution chamber in the transition region to the exit opening, where the nozzle openings are located when the nozzle foil is in use. If several communicating channels are provided on one side of the longitudinal center plane of the exit opening, these may be at different distances from the longitudinal center plane. 
     Considering a preferred embodiment, the first deflecting site in the flow path in the pressure distribution chamber is provided downstream of the output orifice. The first deflecting site, said deflecting site comprising the entire surface of a first wall section of the pressure distribution chamber, comprises a first deflecting surface. This first deflecting surface, said surface extending diagonally or transversely with respect to the outflow direction of the water exiting through the output orifice and thus representing the first resistance in the course of the flow and affecting the flow direction, and a second deflecting surface, said surface being arranged radially with respect to the flow direction opposite the first deflecting surface, thus represent the first deflecting site. Preferably, the first deflecting surface consists of a first wall section of the pressure distribution chamber. 
     Downstream of the first deflecting site in the flow path of the water, it is possible to provide and additional, second deflecting site that is located, in particular, in the pressure distribution chamber and, considering a simple embodiment, is preferably formed by a wall section of the pressure distribution chamber. Likewise, this second deflecting site comprises the entire surface of the wall section associated therewith. The water reaches the nozzle openings of the nozzle strip only after flowing through the two deflecting sites. 
     The deflecting surfaces may have one or several plane surface sections. It is also possible to configure the deflecting surfaces so as to be curved, for example, concave or convex. Preferably, the deflecting surfaces are without edges. 
     The inflow chamber and the at least one communicating channel may be provided in an injector body. In doing so, the injector body is preferably connected to an injector base having an exit opening. In a preferred embodiment of the injector, the injector body as well as the injector base delimit the pressure distribution chamber, said chamber thus being formed by a space between the injector body and injector base. Such an embodiment allows a simple formation of the pressure distribution chamber. In doing so, the first deflecting surface of the first deflecting site may be provided on the injector base. The second deflecting surface of the first deflecting site may be provided on the injector body. Therefore, the two deflecting surfaces can be very easily produced during the manufacture of the injector base or the injector body. In this exemplary embodiment, the first deflecting surface of the second deflecting site can be provided on the injector body, and the second deflecting surface of the second deflecting site may be provided on the injector base. Furthermore, considering another exemplary embodiment, it is possible to provide the first deflecting surface of the first deflecting site on the injector body and to provide the second deflecting surface of the first deflecting site on the injector base. 
     In special applications, it is possible to arrange the communicating channel at an angle not equal to 90° relative to the longitudinal center plane of the inflow chamber. Then, it is possible to arrange the input orifice of the communicating channel on one side of the longitudinal center plane and the output orifice of the communicating channel on the other side of the longitudinal center plane. It is also possible for the longitudinal center axis of the communicating channel to intersect the longitudinal center plane of the inflow chamber in the region of the input orifice, and for the output orifice of the communicating channel to be arranged at a distance from the longitudinal center plane of the inflow chamber. In the case of such an arrangement, the input orifice has an elliptical circumference that can be of advantage from the viewpoint of flow technology. 
     Advantageous embodiments and additional features of the invention are obvious from the dependent patent claims and the description. The drawings are to be used for supplementary reference. Hereinafter, exemplary embodiments of the invention are explained in detail with reference to the attached drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic longitudinal section of a first exemplary embodiment of an injector, along section line I-I in  FIG. 2   a.    
         FIG. 2   a  is a cross-section of the injector of  FIG. 1 , along section line II-II in  FIG. 1 . 
         FIG. 2   b  is a schematic cross-sectional representation of the first deflecting site of  FIG. 2   a.    
         FIG. 3  is a schematic cross-sectional representation of a modification of the exemplary embodiment of the injector in accordance with  FIGS. 1 ,  2   a  and  2   b.    
         FIG. 4  is a schematic cross-sectional representation of another exemplary embodiment of an injector comprising two rows of communicating channels extending in longitudinal direction. 
         FIG. 5  is a schematic cross-sectional representation of a modification of the exemplary embodiment of the injector in accordance with  FIG. 4 . 
         FIG. 6  is a longitudinal section of a detail of the inflow chamber of an exemplary embodiment comprising two rows of communicating channels, along section line III-III in  FIG. 4  or  5 . 
         FIG. 7  shows a modification of the arrangement of the two rows of communicating channels in accordance with the view of  FIG. 6 . 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       FIG. 1  shows a first exemplary embodiment of an injector  10  of a textile processing machine that is used for the production of fleece materials. The injector  10  comprises an injector body  11  and an injector base  12  that are connected to each other. Inside the injector body  11  is an inflow chamber  13  that communicates with a pressure source  15  via an inflow opening  14 . In the exemplary embodiment, the inflow chamber  13  has the shape of a cylinder. The inflow opening  14  is a bore provided coaxially with respect to the longitudinal axis of the inflow chamber  13 . On the longitudinal end side opposite the inflow opening  14 , the inflow chamber  13  is closed in a fluid-tight manner by a screwed-in cap  16  of the injector body  11 . To do so, a ring seal  17  may be provided between the cap  16  and the seat of the cap. 
     Furthermore, the injector  10  comprises a pressure distribution chamber  18  that extends in a longitudinal direction L in the region between the injector body  11  and the injector base  12 . Consequently, the pressure distribution chamber  18  is made up of the injector body  11  and the injector base  12  together. To do so, the injector base  12  has a recess  19  that is open toward the injector body  11 . Correspondingly, a recess  20  open toward the injector base  12  is provided in the injector body  11 . After connecting the injector body  11  and the injector base  12 , the two recesses  19 ,  20  together form the pressure distribution chamber  18 . In order to create fluid-tightness between the injector body  11  and the injector base  12 , it is possible to provide one or more sealing devices that are not specifically shown in the drawing. 
     The inflow chamber  13  and the pressure distribution chamber  18  are in fluid communication with the help of a plurality of communicating channels  23 . The communicating channels  23  extend between an input orifice  24  in the inflow chamber  13  and an output orifice  25  in the pressure distribution chamber  18 . In the preferred exemplary embodiment, the communicating channels  23  are represented by cylindrical bores in the injector body  11 . The longitudinal axes  26  of the communicating channels  23  essentially extend at a right angle relative to longitudinal direction L of the injector  10 . Consequently, the output orifice  25  is in the recess  20  that forms the part of the pressure chamber  18  that is delimited by the injector body  11 . 
     An exit opening  30  is provided on the injector base  12 . Said exit opening extends in longitudinal direction L and is in fluid communication with the pressure distribution chamber  18 . Adjoining the pressure distribution chamber  18 , the exit opening  30  has a slit-shaped section  31  that is adjoined by a conical section  32 . When viewed in cross-section in accordance with  FIG. 2   a , the exit opening  30  has an overall funnel-shaped form. The side of the injector base  12  facing away from the injector body  11  forms an exit side  33  of the injector  10 . The conical section  32  of the exit opening  30  is open toward the exit side  33 . A longitudinal center plane  34  divides the exit opening  30  in the center. In the preferred exemplary embodiment, the exit opening  30  is symmetrical with respect to the longitudinal center plane  34 . 
     A receptacle  35  for a nozzle foil  36  is provided in the transition region between the pressure distribution chamber  18  and the exit opening  30 . The nozzle foil  36  has a plurality of nozzle openings  37  that are arranged, in particular, at regular intervals in longitudinal direction L. One or also more rows of nozzle openings  37  may be arranged next to each other in the nozzle strip  36  in longitudinal direction L. The nozzle openings  37  completely extend through the nozzle foil  36 . With the nozzle foil  36  inserted in the receptacle  35 , the nozzle openings  37  are located between the pressure distribution chamber  18  and the exit opening  30 . The pressurized medium made available in the pressure distribution chamber  18 —for example water in the exemplary embodiment—flows through the nozzle openings  37  and is thus transformed into fine, needle-like jets  38 , i.e. water jets, as is schematically shown in dotted lines in  FIG. 1 . The receptacle  35  comprises a seat for the nozzle foil  36 , said seat accommodating a ring-shaped seal  29  in order to prevent the stream from flowing around the nozzle foil. Consequently, the water is forced to flow through the nozzle openings  37 . 
     The communicating channels  23  in accordance with the example extend completely outside the longitudinal center plane  34  of the exit opening  30 . The longitudinal axes  26  of the communicating channels  23  extend parallel to the longitudinal center plane  34  through the exit opening  30  at a distance with respect thereto. Referring to the preferred exemplary embodiments of the injector  10  described here, the input orifices  24  are positioned so as to be laterally offset in a direction transverse with respect to longitudinal direction L relative to a longitudinal center plane  39  through the inflow chamber  13  ( FIG. 2   a ). 
     Between the input orifice  24  and the exit opening  30 , the communicating channel  23  and the pressure distribution chamber  18  define a flow path  40  for the water flowing between the inflow chamber  13  and the exit opening  30 . This flow path  40  comprises a first deflecting site  41  where the flow direction of the water is changed. This prevents that a straight flow path is possible between the input orifice  24  and the exit opening  30 . 
     The first deflecting site  41  is represented by a first wall section  45  of the pressure distribution chamber  18  that comprises a first deflecting surface  46  and a second deflecting surface  61 . This first deflecting surface  46  is located downstream opposite the output orifice  25  and extends, at least in sections, diagonally or transversely with respect to the flow direction of the medium flowing out of the output orifice  25 . The deflecting surface  46  is arranged on the outside of the communicating channel  23 . In the exemplary embodiment, the first deflecting surface  46  is provided in the injector base  12  and thus represents one wall section of the recess  19  provided in the injector base  12 . The first deflecting surface  46  extends in longitudinal direction L along the pressure distribution chamber  18 . Said latter deflecting surface is curved about an axis extending in longitudinal direction L so as to be concave. The radius of curvature may be determined as a function of the spatial conditions of the injector  10 . The second deflecting surface  61  of the first deflecting site  41  is arranged—in flow direction—so as to be radially opposite the first deflecting surface  45 . This second deflecting surface  61  is configured so as to represent a straight, plane surface that is arranged at an acute angle relative to the longitudinal axis  26  of the communicating channel  23  and to extend in longitudinal direction L along the pressure distribution chamber  18 . The flow direction of the medium is defined by the interaction of the first deflecting surface  46  and the second deflecting surface  61 . 
     As an alternative to the illustrated exemplary embodiments it is also possible for the first deflecting surface  46  to have one or more plane surface sections or to be formed by one of more plane surface sections. The second deflecting surface  61  may be curved so as to be concave or convex, for example. Preferably, the two deflecting surfaces  46 ,  61  do not have edges. 
     The first deflecting site  41  is located in the axial extension of the communicating channels  23 . The longitudinal axes  26  of the communicating channels  23  intersect the first deflecting surface  46  of the first wall section  45  of the first deflecting site  41 . The first deflecting surface  46  is not formed by an additional component but is created when the pressure distribution chamber  18  is formed. The injector consists only of the injector body  11  and injector base  12 . An additional, separate component that has the deflecting surface  46  is not necessary. 
     Downstream of the first deflecting site  41 , for example, the flow path  40  has a second deflecting site  49 . The second deflecting site  49  is represented by a second wall section  50  of the pressure distribution chamber  18 , said wall section comprising a first deflecting surface  51  and a second deflecting surface  62 . The first deflecting surface  51  of the second deflecting site  49  is located on the injector body  11 . Said first deflecting surface is part of the recess  20  provided in the injector body  11 . In the exemplary embodiments described here, the first deflecting surface  51  is curved so as to be concave and extends in longitudinal direction L of the pressure distribution chamber  18 . The first deflecting surface  51  is laterally offset relative to the first deflecting surface  46  of the first deflecting site  41 . The longitudinal center plane  34  through the exit opening  30  may intersect the first deflecting surface  51 . In the embodiments illustrated here, the first deflecting surface  51  directly adjoins the longitudinal center plane  34 . The second deflecting surface  62  of the second deflecting site  49  is provided on the injector base  12  and is part of the recess  19  on the injector base  12 . The second deflecting surface  62  is represented by a straight, plane surface and extends along longitudinal direction L of the pressure distribution chamber  18 . The first and the second deflecting surfaces  51 ,  62  are arranged above the receptacle  35  for the nozzle strip  36 . The flow direction of the medium is determined by the interaction of the first deflecting surface  51  and the second deflecting surface  62 . 
     Both first deflecting surfaces  46 ,  51  have the form of a groove extending in longitudinal direction L. 
     The water flow along the flow path  40  thus is initially straight through the communicating channel  23  up to the first deflecting site  41 . There, the flow is laterally deflected in a direction transverse to the longitudinal axis  26  of the communicating channel  23  and in a direction transverse to longitudinal direction L. Farther downstream, there is the second deflecting site  49  that deflects the water in the direction of the exit opening  30  toward the nozzle strip  36 ; as a result of this, following the second deflecting site  49 , a flow direction is attained that extends approximately parallel to the exit opening of the water jets  38  or parallel to the longitudinal center plane  34  through the exit opening  30 . Consequently, the flow path  40  is essentially stepped. 
     Irregularities  52  may be arranged so as to be, in particular, regularly distributed in the flow path  40  on the walls or wall sections of the communicating channels  23  and/or of the pressure distribution chamber  18 . Such irregularities  52  may be concave recesses and/or raised beads. Preferably, such irregularities  52  are provided at least on the wall sections of the pressure distribution chamber  18 , in particular on one or more of the deflecting surfaces  46 ,  61 ,  51 ,  62 , as is schematically shown in  FIG. 2   b  with reference to the example of the first deflecting site  41 . 
       FIG. 3  shows an exemplary embodiment of the injector  10 , said embodiment having been modified compared with  FIGS. 1 and 2 . The essential difference is that the longitudinal center plane  39  through the inflow chamber  13  forms a common plane with the longitudinal center plane  34  through the exit opening  30 . Consequently, the exit opening  30  is arranged so as to be centered relative to the inflow chamber  13 . Other than that, reference is made to the description of the first exemplary embodiment in accordance with  FIGS. 1 and 2 . 
       FIG. 4  shows another exemplary embodiment of the injector  10 . Different from the previous embodiments, the communicating channels  23  in this case are not arranged in a row in longitudinal direction L but in two spaced-apart rows  55  ( FIGS. 6 and 7 ). Both rows  55  are at a lateral distance from the longitudinal center plane  39  through the inflow chamber  13 , so that the longitudinal axes  26  of the communicating channels  23  extend parallel to and at a distance from the longitudinal center plane  39 . In doing so, the longitudinal center plane  39  through the inflow chamber  13  divides the injector body  11  into two parts, whereby each of the two parts has a row  55  of communicating channels  23 . Therefore, the communicating channels  23  are arranged on both sides of the longitudinal center plane  39  through the inflow chamber  13 . 
     In doing so, the flow path  40  through one of the communicating channels  23  into the pressure distribution chamber  18  takes the previously described course. Also in this case, adjoining each communicating channel  23  in the pressure distribution chamber  18 , there is a first deflecting site  41  as well as a second deflecting site  49 , so that the water flowing into the pressure distribution chamber  18  is deflected twice along each flow path  40  before reaching the nozzle strip  36  or the exit opening  30 . Regarding this, reference may be made to the above description. Considering the two-row arrangement of the communicating channels  23 , there is a confluence of the streams from the first row  55  meet the streams from the other row  55  in the pressure distribution chamber  18 . The flow directions of the water inflowing from the first row  55  is different from the flow direction of the water inflowing from the other row  55 . 
     As is schematically shown in  FIGS. 6 and 7 , the two rows  55  of communicating channels  23  may be arranged symmetrically with respect to the longitudinal center plane  39  of the inflow chamber  13 . In doing so, the communicating channels  23  are arranged in pairs, so that one communicating channel  23  of one pair  56  is arranged on one side of the longitudinal center plane  39  and the respectively other communicating channel  23  of this pair  56  is arranged on the other side of the longitudinal center plane  39  ( FIG. 6 ). Considering this symmetrical arrangement in pairs, it is possible to have the two streams of water of one pair  56  of the communicating channels  23  intersect in the pressure distribution center  18  or to direct said streams against each other, thus achieving good mixing of the water. 
       FIG. 7  shows an alternative option of arranging the two rows  55  of communication channels  23 . Different from the embodiment option in accordance with  FIG. 6 , the two rows  55  are offset relative to each other, viewed in longitudinal direction L. The streams entering into the pressure distribution chamber  18  through the two rows  55  of communicating channels  23  do not intersect in a common plane extending at a right angle with respect to longitudinal direction L. The water streams flow offset in longitudinal direction L into the pressure distribution chamber  18 . As a result of this, the water of the individual streams may expand well in a direction transverse to the respective flow direction in the pressure distribution chamber  18 . 
     Referring to the exemplary embodiments in accordance with  FIGS. 1 through 4  of the injector  10 , the receptacle  35  for the nozzle strip  36  has slit-like recesses  60  on both longitudinal sides, so that both longitudinal sides of the inserted nozzle foil  36  come into engagement with the recess  60 . In order to install the nozzle foil  36 , said foil may be slid in longitudinal direction L into the injector  10 . In the exemplary embodiment in accordance with  FIG. 5 , there are no such recesses  60 . The receptacle  35  is formed by a groove having a rectangular cross-section. Holding means or clamping means for pressing the nozzle foil  36  against the seal  29  may be provided, but are not specifically shown in the drawings. 
     The invention relates to an injector for a textile processing machine for the manufacture of fleece material. An inflow chamber  13  is provided inside an injector body  11 , in which case a pressurized medium is made available in said inflow chamber. By way of several communicating channels  23 , said inflow chamber is in fluid communication with a pressure distribution chamber  18 . The communicating channels  23  are represented by cylindrical bores that are provided in the injector body  11 . The communicating channels  23  are arranged in one or two rows so as to be offset relative to the longitudinal center plane  39  of the inflow chamber  13 . The pressure distribution chamber  18  adjoining the communicating channels  23  comprises a first wall section  45  that forms a first deflecting surface  46 . This deflecting surface  46  extends—at least in sections—diagonally or transversely with respect to the longitudinal axis  26  of the communicating channels  23 . The medium flowing out of the communicating channels  23  is deflected by means of the first deflecting surface  46 , so that said medium changes its direction before reaching the downstream nozzle openings  37  of a nozzle strip  36 . Consequently, a direct straight flow to the nozzle openings  37  from the inflow chamber  13  is not possible. Through the nozzle openings  37 , water jets  38  are formed, said water jets being ejected by the injector  10  via an exit opening  30 . 
     It will be appreciated that the above description of the present invention is susceptible to various modifications, changes and modifications, and the same are intended to be comprehended within the meaning and range of equivalents of the appended claims. 
     LIST OF REFERENCE NUMERALS: 
     
         
           10  Injector 
           11  Injector body 
           12  Injector base 
           13  Inflow chamber 
           14  Inflow opening 
           15  Pressure source 
           16  Cap 
           17  Ring seal 
           18  Pressure distribution chamber 
           19  Recess in  12   
           20  Recess in  11   
           23  Communicating channel 
           24  Input orifice 
           25  Output orifice 
           26  Longitudinal axis of  23   
           29  Ring-shaped seal 
           30  Exit opening 
           31  Slit-shaped section 
           32  Conical section 
           33  Exit side 
           34  Longitudinal center plane of  30   
           35  Receptacle 
           36  Nozzle strip, nozzle foil 
           37  Nozzle opening 
           38  Jet, water jet 
           39  Longitudinal plane of  13   
           40  Flow path 
           41  First deflecting site 
           45  First wall section of  18   
           46  First deflecting surface of  41   
           49  Second deflecting site 
           50  Second wall section of  18   
           51  First deflecting surface of  49   
           52  Irregularities 
           55  Row of communicating channels 
           56  Pair of communicating channels 
           60  Recess 
           61  Second deflecting surface of  41   
           62  Second deflecting surface of  49