Abstract:
One disadvantage during delivery of products such as foams, for instance shaving foam or gel, self-foaming products and other products that are applied with a pressurized system from a conventional, pressurized dispenser container with the aid of known dispenser heads that can be inserted into the delivery valve of the dispenser container is that the pressurized product remaining in the delivery channel continues to be pressed out in small amounts in an uncontrolled manner after utilization despite the fact that the delivery valve is closed. In order to eliminate said disadvantage, the dispenser head ( 1 ) is configured with an additional closing device ( 1 ′) that automatically opens the delivery hole ( 3 ) and automatically closes it after the dispensing process is completed.

Description:
BACKGROUND OF THE INVENTION 
   The invention concerns a dispenser head with a delivery channel for delivering products, such as foams, for example, shaving cream or gel, self-foaming products, and other products that can be applied with a pressurized system, from a conventional pressurized dispensing container, wherein the dispenser head is mounted on the delivery valve of the dispensing container and opens the delivery valve of the dispensing container when external mechanical pressure applied to the dispenser head causes its upper part to tilt about a center of rotation, so that the product flows under pressure out of the delivery valve and into the delivery channel and is discharged from the dispenser head through the delivery hole of the delivery channel. 
   A disadvantage of previously known dispensers or dispenser heads of this type is that after use and after the tilted upper part has returned to its initial position, the still pressurized product remaining in the delivery channel continues to emerge in small amounts from the delivery hole of the dispenser head, despite the fact that the delivery valve is already closed. This undesired and uncontrolled continued release of the product then gets the dispenser head and, if present, the protective cap dirty. 
   SUMMARY OF THE INVENTION 
   The objective of the invention is to design a dispenser head for pressurized dispensing containers in such a way that the above-described continued release of the product after it use is prevented. 
   For a dispenser head of the type specified above, this objective is achieved by the characterizing features of Claim  1  in such a way that the dispenser head is designed with an additional closure device that automatically opens the delivery hole of the delivery channel and automatically closes it after the dispensing process is completed. 
   Release of the product after use is reliably prevented by the design of the dispenser head with a special closure for the delivery hole in accordance with the invention. The closure device of the dispenser head, which can be fitted on any conventional aerosol valve, consists, specifically, of a valve housing, which forms part of the delivery channel located in the upper part of the dispenser head, a pin-like valve body with a valve head for closing the delivery hole, and a restoring element. 
   In a first embodiment of the invention, the restoring element consists of an elastic dome, whose semicircular rear wall contains an inner sleeve, into which the opposite end of the valve body from the valve head is inserted. In the initial position, the internal stress of the elastic body pulls the valve head of the valve body against the delivery hole of the delivery channel from the front and closes it. 
   The position of the elastic dome with respect to the usual center of rotation for the tilting movement of the upper part of the dispenser head is selected in such a way that, during the tilting movement, its elastic rear wall is moved in a circular path towards a stationary web of the lower part of the dispenser head, so that the elastic rear wall is deformed and displaced a certain distance in the direction of the delivery hole. 
   The elasticity and the internal stress of the elastic dome that exists before the deformation are set sufficiently great by suitable selection of a material that after the upper part has been returned to its initial position, the rear wall of the dome returns to its initial position and thus pulls the valve head of the valve body back onto the delivery hole of the delivery channel from the front. This process is assisted by the pressurized process remaining in the valve housing, which presses against both the valve head and the rear wall of the dome. Since, however, in accordance with the invention, the effective surface of the rear wall is greater than the effective surface of the valve head, the resultant force exerted by the pressurized product acts to restore the rear wall and thus to close the delivery hole. 
   In a second embodiment of the invention, the valve body, whose valve head closes the delivery hole from the front, is locked in place in a valve body sleeve. The rear part of the valve body sleeve consists of an elastic jacketed wall that acts as a restoring element and is permanently connected with the upper part and/or the lower part of the dispenser head. This elastic rear part of the jacketed wall has the same function as the elastic dome of the first embodiment. During the tilting movement of the dispenser head, the elastic rear part of the jacketed wall moves in a circular path towards a stationary web of the lower part, which causes it to be deformed and displaced, together with the valve body, towards the delivery hole. This causes the valve head, which until now has kept the delivery hole closed, to move towards the outside and open the delivery hole. After the tilted upper part has returned to its initial position, thereby causing the rear part of the valve body sleeve to come clear of the stationary web again, the restoring force of the elastic part of the valve body sleeve acts to pull the valve body back into its initial position to close the delivery hole again. 
   In a third embodiment of the invention, the rear part of the valve body, which closes the delivery hole from the inside, is designed as a jacketed wall and can be filled with the product that is to be delivered. The outer wall of the valve body is made of an elastic material and acts as a restoring element. To this end, the front part of the elastic valve body wall is permanently connected with the upper part and/or the lower part of the dispenser head. This permanent connection is designed in such a way that the elastic valve body wall is placed under tensile stress in the initial position, so that the conical or round tip of the valve head is pulled from the inside against the correspondingly shaped nozzle orifice of the delivery hole and seals it tightly. During the dispensing operation, the product that is to be delivered flows under pressure into the jacketed wall of the valve body. The pressure thus exerted on the inner rear wall of the jacketed wall is greater than the tensile stress in the elastic region of the valve body wall, so that the valve body is pulled inward and opens the delivery hole towards the inside. The tensile stress already present in the initial position is thus increased, accompanied by expansion of the elastic region of the valve body wall. Upon completion of the dispensing process, the stress present in the elastic valve body wall is sufficient for automatic restoration of the valve body and renewed closure of the delivery hole. 
   The elastic part of the valve body sleeve (second embodiment) or of the valve body wall (third embodiment) is joined with the other, nonelastic part of the valve body sleeve or valve body wall in one-piece fabrication by injecting it on by a special injection molding process (two-component injection molding). In this regard, the internal stress of these elastic restoring elements is selected sufficiently high by the use of a suitable elastic material, for example, TPE (thermoplastic elastomers), that it is able, after completion of the dispensing operation and after the return of the tilted upper part of the dispenser head to its initial position, to pull the valve body back into its initial position and to close the delivery hole tightly again with the valve head. 
   In a fourth embodiment, which is similar to the third embodiment, the valve body is designed with a jacketed wall, which can be filled with the product that is to be delivered. To lock the valve body in place, the double-walled rear part of the valve body is pressed against a projecting rib of a stationary web in the initial position of the dispenser head, and the valve head fits against the delivery hole and tightly seals it from the inside. In this initial position, the rear elastic region of the jacketed wall is compressed. The web and its rib are arranged in such a way that the valve body is rotated out of its locked position by the circular tilting movement of the upper part of the dispenser head during the dispensing process. After the valve body has been released from its locked position, the excess pressure of the product that prevails in the jacketed wall, which initially acts only on the rear wall of the jacketed wall, pulls the valve body inward, assisted by the restoring force of the compressed elastic region of the jacketed wall, thereby causing the valve head to open the delivery hole. When the upper part of the dispenser head rotates back into its initial position, the valve body is manually rotated back towards the delivery hole by the projecting rib. This causes the delivery hole to be closed and the elastic region of the jacketed wall of the valve body to be compressed again. 
   Further advantages, features and details of the invention are explained in greater detail below with reference to specific embodiments illustrated in the schematic drawings. 

   
     BRIEF DESCRIPTION OF THE DRAWING 
       FIG. 1  shows a vertical section through a dispenser head in its initial position. 
       FIG. 2  shows a vertical section through a dispenser head in its dispensing position. 
       FIG. 3  shows a front view of the dispenser head of  FIG. 1 . 
       FIG. 4  shows the dispenser head of  FIG. 1  without the closure device. 
       FIG. 5  shows the closure device of  FIGS. 1 ,  2 , and  3 . 
       FIG. 6  shows the valve body of  FIG. 5 . 
       FIG. 7  shows the valve housing of  FIG. 5 . 
       FIG. 8  shows the elastic dome of  FIG. 5 . 
       FIG. 9  shows a vertical section through a second dispenser head in its initial position. 
       FIG. 10  shows an enlarged section of  FIG. 9  in its dispensing position. 
       FIGS. 11   a,b  show two alternative designs of the delivery hole closure of the second dispenser head. 
       FIG. 12  shows a vertical section through a third dispenser head in its initial position. 
       FIG. 13  shows an enlarged section of  FIG. 12  in its dispensing position. 
       FIGS. 14   a - c  show three alternative designs of the delivery hole closure of the third dispenser head. 
       FIGS. 15   a,b  show a vertical section through a fourth dispenser head in its initial position and dispensing position, respectively. 
   

   DETAILED DESCRIPTION OF THE INVENTION 
     FIG. 1  shows a vertical section through a dispenser head  1  with a closure device  1 ′ and with the dispenser head in its initial position. This closure device  1 ′ is located in the upper part  10  of the dispenser head  1 . The upper part  10  of the dispenser head  1  can be tilted relative to the opening of the delivery valve of the dispensing container. The closure device  1 ′ consists of a valve housing  4 , which at the same time is part of the upper (in the drawing, horizontal) delivery channel  2  and is arranged at right angles to the container axis  15 , a pin-like valve body  5  with a valve head  7 , and an elastic restoring element or dome  6  (in this regard, see also  FIGS. 5 to 8 ). 
   The front part of the valve housing  4  ends some distance from the front edge  16  of the upper delivery channel  2  with the delivery hole  3 , and the rear part of the valve housing  4  (on the right side in the drawing) is formed by the elastic dome  6  that is slipped over it. The semicircular rear wall  12  of the dome  6  has a sleeve  8 , into which the tapered end  18  of the pin-like valve body  5  at the opposite end of the valve body  5  from the valve head  7  is inserted. The length of the pin-like valve body  5  is dimensioned in such a way that, in the initial position of the dispenser head  1 , the valve head  7  is pulled from the front against the delivery hole  3  by the internal stress of the elastic dome  6  and closes the delivery hole  3 . 
   The lower part  11  of the dispenser head  1 , which is not tiltable and is connected with the dispensing container (the dispensing container is not shown) by being mounted on it, has a lateral web  9 , which is tangent to the semicircular rear wall  12  of the dome  6 . 
     FIG. 2  shows the dispenser head  1  of  FIG. 1  in its dispensing position. The upper part  10  of the dispenser head  1  has been tilted about a center of rotation (the center of rotation is not shown) by external mechanical pressure on the button  17  of the dispenser head, thereby causing the delivery valve (not shown) of the dispensing container to open and the product to flow into the delivery channel  2  and into the valve housing  4 . During this tilting movement, the dome  6  was moved downward towards the dispensing container in a circular path with its semicircular rear wall  12  against the stationary web  9 , which caused the rear wall  12  to deform and to be displaced in the direction of the delivery hole. This displacement of the rear wall  12  also caused the valve body  5 , which is inserted in the sleeve  8  on the inside of the rear wall  12 , to be displaced, together with its valve head  7 , in the same direction, thereby opening the delivery hole  3 . In this dispensing position, the product already present in the valve housing  4  can be discharged from the delivery hole  3 . 
   When the dispensing process has been completed and the external mechanical pressure on the button  17  has been discontinued, the closure device  1 ′ is rotated back with the upper part  10  of the dispenser head  1  to its initial position by the tension present in the center of rotation of the dispenser head  1  and by the force of the still open delivery valve of the dispensing container, so that the delivery valve of the dispensing container closes again. The restoration of the upper part  10  causes the rear wall  12  of the elastic dome  6  to clear the web  9  again, and its deformation is eliminated by its internal stress and the excess pressure of the product still present in the valve housing  4 . The valve body  5  attached to the rear wall  12  is thus pulled in the same direction back into its original position, and the valve head  7  is pulled tightly against the delivery hole  3  from the front, so that the delivery hole  3  is closed. 
   Another advantage of the closure device  1 ′ of the invention is that the pressing of the valve head  7  against the delivery hole  3  is effected not only by the internal stress of the elastic dome  6  abut also by the difference in size of the effective surfaces  13 ,  14  of the rear wall  12  and valve head  7  that are acted upon by the excess pressure of the product. Since the effective surface  14  of the rear wall  12  of the dome  6  is significantly greater than the effective surface  13  of the valve head  7 , a resultant force is created, which acts only on the rear wall  12 , with the result that the greater the overpressure is, the greater also is the force with which the valve head  7  is pulled against the delivery hole  3  and the greater also is the tightness of the system. The stated objective of the invention of preventing continued release of the product after the dispensing process has been completed is thus achieved. 
   In  FIGS. 3 to 8 , the essential design elements of the dispenser head of the invention  1  are shown again individually for better clarity. In  FIG. 3 , the dispenser head  1  of  FIG. 1  with the closure device  1 ′ of the invention is shown in a front view. A comparison with  FIG. 4 , which shows the dispenser head  1  without the closure device  1 ′, more clearly reveals especially the size of the closure device  1 ′ in relation to the size of the dispenser head  1  and its adaptation to the dispenser head.  FIG. 5  shows the complete closure device  1 ′ separately in its initial position with the delivery hole  3  closed and the rear wall  12  of the dome  6  undeformed. In  FIGS. 6 to 8 , the individual components of this closure device  1 ′ are then presented separately.  FIG. 6  shows the valve body  5  with the valve head  7  at one end and the tapered opposite end  18  for insertion in the sleeve  8  of the dome  6 .  FIG. 7  shows the valve body  4 , and  FIG. 8  shows the elastic dome  6  with its rear wall  12  and the sleeve  8  arranged on it. 
     FIGS. 9 and 10  show a second embodiment of the dispenser head of the invention.  FIG. 9  shows the entire dispenser head  20  in its initial position, and  FIG. 10  shows an enlarged section of the dispenser head  20  in its dispensing position. The dispenser head  20  consists of an upper part  30  and a lower part  31  with an integrated closure device  21 . A valve body sleeve  28  with a valve body  25  inserted from the front and locked in place is arranged in the valve housing  24  of the closure device  21 . To guide the valve body  25 , the front part of the valve body sleeve  28  is formed with a nozzle head  36  with alternately arranged passages  36 ′ in a guide region  34  to allow the delivery of the product between the valve body  25  and the valve body sleeve  28 . The valve body  25  is arranged in the valve body sleeve  28  in such a way that the valve head  27  closes the delivery hole  23  from the front. The valve body sleeve  28  is formed as part of the delivery channel  22  with a jacketed wall  32 , which can be filled with the product through the lower opening  33 . 
   A seal is created between the dispenser head  20  and the closure device  21  by two elastic annular beads  32 ′ and  32 ″. Between these two annular beads  32 ′ and  32 ″, an annular space is formed, through which the product can flow, so that positioning of the lower opening  33  of the closure device relative to the product channel  19  of the dispenser head  20  becomes unnecessary. The result of this measure is easier assembly. 
   The function of the elastic dome  6  as a restoring element in the first embodiment of the invention, which is illustrated in  FIGS. 1 to 8 , is performed in this second dispenser head  20  by the injected rear end  26  of the valve body sleeve  28 . This rear end  26  consists of an elastic material and is permanently connected in a snap-in connection by the elastic annular beads  32 ′,  32 ″ with the upper part  30  and the lower part  31  of the dispenser head  20 . 
   During the tilting movement of the closure device  21  by manual pressure on the button  37  to initiate the dispensing process, the valve body sleeve  28  with its restoring element or rear end  26  is moved in a circular path towards the stationary web  29  of the lower part  31  and pushed towards the front along with the valve body  25 , so that the valve head  27  opens the delivery hole  23  towards the front, and the product emerges from the valve head  27  in the direction  39  indicated by the arrow. At the same time, the contact with the web  29  deforms (compresses) the elastic rear end  26 . Upon completion of the dispensing process, the rear end  26  of the valve body sleeve  28  comes clear of the web  29  again, and the restoring force of the compressed rear end  26  and the pressure exerted on its rear wall  26 ′ by the still pressurized product present in the jacketed wall  32  pull the valve body sleeve  28  together with the valve body  25  back into the initial position. The nozzle head  36  of the delivery hole  23  is designed with a corner that springs back and in this initial position is sealed with point contact by the valve head  27  with its conically formed front part. 
     FIGS. 11   a  and  11   b  show alternative designs of the delivery hole closure with nozzle head  36  and valve head  27 . In  FIG. 11   a , with a design that is similar overall to the design shown in  FIGS. 9 and 10 , the nozzle head  36   a  is likewise formed with a cone that corresponds to the cone of the valve head  27   a  of the valve body  25   a , so that a sealing contact of large surface area is produced. In  FIG. 11   b , with the same conical seal between the valve head  27   b  and the nozzle head  36   b  and a smaller guide region of the nozzle head  36   b , the valve head  27   b  of the valve body  25   b  is additionally designed with an outwardly projecting central pin  35 , which ensures better distribution of the product as it is delivered from the dispenser head. 
   A third variant of the dispenser head of the invention is shown in its initial position in  FIG. 12  and in its dispensing position in  FIG. 13 , which shows an enlarged section of  FIG. 12 . The dispenser head  40  consists of an upper part  50  with a closure device  41  installed in it and a lower part  51 . The closure device  41  consists of a valve housing  44  with a nozzle head  56  and a valve body  45 , whose valve head  47  closes the delivery hole  43  of the nozzle head  56  from the inside. The rear part of the valve body  45  is formed by a jacketed wall  52 , which is open towards the valve head  47  and in the opposite direction is closed by a rear wall  52 ′. The jacketed wall  52  thus forms part of the delivery channel  42  and can be filled with the product to be delivered through a lower opening  53 . The outer valve body wall  46  acts as a restoring element and consists of an elastic material injected on the other wall. It is permanently connected with the upper part  50  and the lower part  51  in a snap-in connection by means of the elastic annular beads  46 ′,  46 ″. These annular beads  46 ′,  46 ″ result, in the same way as in  FIG. 10 , in a seal between the dispenser head  40  and the closure device and, in the same way as described there, result in easier assembly by the formation of an annular space through which product can flow. 
   In the initial position, the elastic valve body wall  46  is under tensile stress as a restoring element and pulls the valve body  45  with its valve head  47  against the delivery hole  43  of the nozzle head  56  to seal it. This tensile stress in the elastic valve body wall  46  is produced by virtue of the fact that the nozzle head  56  is installed by inserting it from the front into the valve housing  44 , thereby displacing the valve body  45  to the rear. 
   The elastic valve body wall  46  acts as an automatic restoring element during the dispensing process in the following way: During the dispensing process, operation of the button  57  causes the product that is to be delivered to flow from below through the lower opening  53  into the cavity formed by the jacketed wall  52 . The pressurized product, whose pressure is greater than the preset tensile force, presses against the rear wall  52 ′ of the jacketed wall and, since the delivery hole  43  is still closed at first, causes expansion of the elastic outer valve body wall  46  and an increase in the tensile stress that was initially present, thereby displacing the valve body  45  in the direction of the rear wall  52 ′. This displacement causes the valve head  47  of the valve body  45  to open the delivery hole  43  towards the inside, and the product can then emerge from the dispenser head  40  in the direction  59  indicated by the arrow. Upon completion of the dispensing process, the restoring force of the elastic outer valve body wall  46  automatically pulls the valve body  45  back into its initial position, and the valve head  47  closes the delivery hole  43 . The conically pointed valve head  47 , which is adapted to the conical shape of the delivery hole  43  of the nozzle head  56 , ensures the closing of the delivery hole  43 . 
   Further possible designs of the front closure are shown in  FIGS. 14   a  to  14   c . In  FIG. 14   a , the front part of the valve body  47   a  is designed with a central cylindrical pin  55 . The valve body  45   a  is guided here by guide webs  58   a , which are arranged in the delivery opening  43   a  of the nozzle head  56   a  with conical centering and encompass the cylindrical pin  55 . The delivery hole  43   a  is sealed by a flat seal between the peripheral edge  48  of the valve head  47   a  and the rear part of the nozzle head  56   a . In  FIG. 14   b , which shows a design that is otherwise identical to the design of  FIG. 14   a , the delivery hole  43   a  is sealed between the rear part of the nozzle head  56   b , which is designed flat in the radial direction, and the peripheral edge  48  of the end face of the valve head  47   b .  FIG. 14   c  shows another variant with the same seal as in  FIG. 14   a  or  14   b , but in this case the guiding of the valve body  45   c  is augmented in such a way that, in addition to the guiding of the pin  55 , an extended front part  45   c ′ of the valve body  45   c  is guided and supported by the correspondingly formed nozzle head  56   c′.    
   Another (fourth) design variant of the dispenser head is shown in  FIGS. 15   a  (in the initial position) and  15   b  (in the dispensing position). Just like the dispenser head  40  of  FIG. 12 , the dispenser head  60  consists of an upper part  70  and a lower part  71  and has a closure device  61 . The closure device  61  has a valve housing  64  that contains a valve body  65  with an elastically designed jacketed wall  72  in its rear region  66  as a restoring element. The jacketed wall  72 , which is open towards the valve head  67  and closed in the opposite direction, can be filled through a lower opening  73  with the product that is to be delivered and forms part of the delivery channel  62 . 
   In the initial position of the dispenser head  60 , the valve body  65  is manually supported with its rear end  72 ′ against a projecting rib  69 ′ of a stationary web  69  of the lower part  71  and locked in place, and the valve head  67  is pressed from inside against the delivery hole  63 , and at the same time, the elastically designed region  66  is compressed. The web  69  with its projecting rib  69 ′ is arranged in such a way that, when the button  77  is manually operated during the dispensing operation, the valve body  65  is rotated out of this locked position by the circular tilting movement of the upper part  70 . The valve body  65 , which comes free at the rear, is pulled in the direction of the web  69 , (towards the right in the drawing) by the pressure exerted by the product on the rear wall of the jacketed wall  72  and by the elastic resilience of the compressed region  66 , and this allows the product to emerge from the dispenser head  60  in the direction  79  indicated by the arrow. 
   Upon completion of the dispensing process, the delivery opening  63  is closed again by the valve head  67  when the upper part  70  rotates back. This rotation causes the rear end  72 ′ of the valve body  65  to be pushed upward over the oblique shoulder  74  of the rib  69 ′ and at the same time forward (towards the left in the drawing), so that the valve head  67  is pressed against the delivery hole  63  from the inside. At the same time, the elastic region  66  of the jacketed wall  72  is compressed again. The restoring force of the upper part to reestablish the initial position is sufficiently great to be able to pull the end  72 ′ of the valve body  65  over the oblique shoulder  74  of the rib  69 ′. In the same way as in  FIG. 10  and  FIG. 13 , annular beads  66 ′,  66 ″ are arranged in the elastic region  66  of the jacketed wall  72 , which in the identical way described in connection with  FIG. 10  and  FIG. 13 , produce a seal between the dispenser head  60  and the closure device  61  and result in easier assembly. 
   The invention is not limited to the specific embodiments that are described above and are illustrated in the drawings, but rather an equivalent or functionally equivalent closure device in accordance with the invention can also be used in other commercial dispenser heads for pressurized dispensing containers after a possibly necessary design adaptation. 
   
     
       
             
           
             
             
             
           
         
             
                 
             
             
               List of Reference Numbers 
             
             
                 
             
           
           
             
                 
             
           
        
         
             
                 
               1, 20, 40, 60 
               dispenser head 
             
             
                 
               1′, 21, 41, 61 
               closure device 
             
             
                 
               2, 22, 42, 62 
               delivery channel 
             
             
                 
               3, 23, 43, 63 
               delivery hole 
             
             
                 
               4, 24, 44, 64 
               valve housing 
             
             
                 
               5, 25, 45, 65 
               valve body (also 25a, 25b, 45a, 45b, 45c) 
             
             
                 
               6, 26, 46, 66 
               restoring element 
             
             
                 
               7, 27, 47, 67 
               valve head (also 27a, 27b, 47a, 47b, 47c) 
             
             
                 
               8, 28 
               sleeve 
             
             
                 
               9, 29, 69, 69′ 
               web 
             
             
                 
               10, 30, 50, 70 
               upper part of 1′, 21, 41, 61 
             
             
                 
               11, 31, 51, 71 
               lower part of 1′, 21, 41, 61 
             
             
                 
               12 
               rear wall of 6 
             
             
                 
               13 
               effective surface of 12 
             
             
                 
               14 
               effective surface of 7 
             
             
                 
               15 
               axis of dispensing container 
             
             
                 
               16 
               front edge of 2 
             
             
                 
               17, 37, 57, 77 
               button 
             
             
                 
               18 
               tapered end of 5 
             
             
                 
               19 
               product channel 
             
             
                 
               26′, 52′ 
               rear wall of 26, 52 
             
             
                 
               32, 52, 72 
               jacketed wall of 25, 45, 65 
             
             
                 
               32′, 32″, 46′, 46″ 
               annular beads of 26, 46, 66 (also 66″) 
             
             
                 
               66′, 
             
             
                 
               33, 53, 73 
               lower opening 
             
             
                 
               34 
               guide region of 25 
             
             
                 
               35, 55 
               central spindle of 25b, 45 
             
             
                 
               36, 56 
               nozzle head (also 36a, 36b, 56a, 56b, 56c) 
             
             
                 
               36′ 
               passages 
             
             
                 
               38 
               snap-in connection 
             
             
                 
               39, 59, 70 
               direction of product delivery 
             
             
                 
               48 
               peripheral edge 
             
             
                 
               58a-c 
               guide webs 
             
             
                 
               74 
               oblique shoulder