WO2009063518A1

WO2009063518A1 - Dispensing head for dispensers of fluid products

Info

Publication number: WO2009063518A1
Application number: PCT/IT2008/000613
Authority: WO
Inventors: Fabrizio Camplone; Giorgio Santoni; Ludovico Brunetti; Marco Zavarella
Original assignee: Emsar S.P.A.
Priority date: 2007-11-16
Filing date: 2008-09-24
Publication date: 2009-05-22
Also published as: BRPI0820235A8; EP2209559B1; BRPI0820235A2; AR071047A1; EP2209559A1; ITRM20070597A1; US20100270336A1; ATE541644T1

Abstract

A dispensing head for dispensers of fluid products comprising a connecting body (3) presenting a lower portion (8) operatively engaged to a dispensing pump of a respective dispenser (2) of the fluid product; a closing lid (4) associated to an upper portion (9) of the connecting body (3) opposite to said lower portion (8); and a nozzle (5) for dispensing the liquid product, associated to said closing lid (4); the nozzle (5) is actuated by respective actuating means (28) between a position of use in which it projects from the overall size of the closing lid (4), and a position of non use in which it is retracted inside the overall size of the closing lid (4).

Description

Dispensing Head For Dispensers Of Fluid Products

Technical Field

The present invention relates to a dispensing head for dispensers of fluid products.

In particular, the present invention relates to a dispensing head advantageously applied to manually operated reciprocating dispensers, coupled to bottles for the containment of fluid products.

Background Art

As is well known, dispensing heads comprise a cylindrical body, presenting a lower portion appropriately coupled to the activating members of a respective dispenser. The dispensing head is generally switchable between a condition of use, in which it is free to slide vertically towards/away from the dispenser, and a condition of non use in which it is locked on appropriate reference abutments. The use/non use mode of the dispensing head is determined by manually rotating the cylindrical body relative to the dispenser.

On the top of the cylindrical body develops a support to exercise the delivery action, generally constituted by a flat surface which the user can operate with a finger to push the entire head, in the respective condition of use, towards the dispenser.

In this way, the vertical actuation of the cylindrical body determines the operation of the dispenser which conveys the liquid product into a flow channel obtained in the cylindrical body itself.

On the top of the cylindrical body also develops an internally hollow spout from which the product passing through the flow channel is distributed to the exterior. The spout for the distribution of the product extends radially relative to the longitudinal development of the cylindrical body. Consequently, the presence of the spout determines immediately and clearly for the final user the point whence the liquid is dispensed. However, the structure of the entire dispensing head determines an asymmetrical extension which, during the steps of assembly on the bottle and transport, generates process challenges and needs particular care.

The spout of the head can accidentally become ensnared during transport and cause the fall of the bottles or the accidental removal of the dispenser. Moreover, the spout markedly complicates the steps of packaging the finished product both with cardboard but above all with heat-shrinking films which, if they are wound on the dispensing spout introduce a flexion stress of the entire system with possible malfunctions and disassembly.

In this context, the technical task of the present invention is to propose a head for dispensing fluid products that is free of the aforesaid drawbacks.

Disclosure of Intention

In particular, an object of the present invention is to propose a dispensing head for dispensers of fluid products, provided with a symmetric structure, lacking element projecting from the transverse dimension of the dispensing head.

More in particular, an object of the present invention is to propose a dispensing head that is produced assembled and shipped with the spout retracted and subsequently extracted by the final user upon opening the system before dispensing the product the first time.

In accordance with the present invention, the technical task and the described objects are achieved by a dispensing head for dispensers of fluid products comprising the technical characteristics set out in one or more of the appended claims.

Description of the Drawings

Further characteristics and advantages of the present invention shall become more readily apparent from the indicative, and therefore non limiting, description of a preferred but not exclusive embodiment of a dispensing head for dispensers of fluid products, as illustrated in the accompanying drawings in which:

- figure Ia illustrates a perspective view of a dispensing head in accordance with a first embodiment of the invention in a respective condition of non operation;

- figure Ib illustrates a perspective view of the dispensing head of figure Ia, in a respective condition of operation;

- figure 2 illustrates a perspective exploded view of the dispensing head and of a respective dispenser;

- figures 3 a and 3b illustrate perspective top views of the dispensing head according to the invention, with some parts removed the better to illustrated others in respective conditions of operation and of non operation;

- figure 4 shows a perspective bottom view of a construction detail of the dispensing head according to the invention;

- figures 5 a and 5b illustrate top plan views of an additional construction detail of the dispensing head with some parts removed, the better to illustrate others;

- figures 6a and 6b illustrate bottom plan views of a construction detail of the dispensing head;

- figure 7a illustrates a perspective view of a dispensing head in accordance with a second embodiment of the invention in a respective condition of non operation;

- figure 7b shows a perspective view of the dispensing head of figure 7a, in a respective condition of operation;

- figure 8 shows a perspective exploded view of the dispensing head of figure 7a and 7b and of a respective dispenser;

- figures 9 and 10 illustrate perspective views, respectively from the bottom and from the top, of a construction detail of the dispensing head of figure 7a and 7b;

- figure 11 shows a longitudinal section view of the dispensing head of figure 7a and 7b;

- figures 12 and 13 illustrate perspective views respectively from the bottom and from the top of an additional construction detail of the dispensing head of figure 7a and 7b; and

- figure 14 shows a perspective bottom view of an additional construction detail of the dispensing head of figure 7a and 7b.

Description of the Illustrative Embodiment

With reference to the accompanying figures, a dispensing head according to the present invention for dispensers, i.e. dispensers 2 of fluid products, is indicated in its entirety with the number 1.

With particular reference to figures Ia to 6, a first embodiment is illustrated of a dispensing head 1 provided, as shall be more readily apparent hereafter in the present description, of a retractile dispensing nozzle 5 whose extraction and closure takes place simultaneously with the opening and closing of the dispenser 2.

In particular, as shown in the exploded view of figure 2, the head 1 is constituted by a connecting body 3, by a closing lid 4 and by a dispensing nozzle 5. The connecting body 3 presents substantially tubular conformation and it is provided with an inner wall 6 and with an outer wall 7, both with annular development.

The body 3 presents a lower portion 8 coupled to a dispensing pump of the dispenser 2, not illustrated in detail because it is not a part of the present invention, and an upper portion 9 constituted by an annular wall 10. In the lower portion 8 of the body 3 are present two orienting teeth 11 (figure 4) positioned diametrically opposite in radial direction towards the centre of the body 3, able to be inserted in appropriate slots present on the pump of the dispenser 2.

In the annular wall 10 is present a groove 12 with defined geometry, for example but not exclusively rectangular, able to allow the passage of fluid from the dispenser to the nozzle 5 as. shall be specified better hereafter.

The annular wall 10, which remains fastened to the dispenser 2, is also coupled to the closing lid 4 which constituted the embodiment means of the entire dispensing head 1.

In greater detail, the closing lid 4 presents an upper thrust surface 13 for the escape of the liquid product, having substantially planar conformation to be actuated by the user's finger. Moreover, the upper surface 13 is delimited by its outer perimeter which may have different embodiments, e.g. square with rounded corners as in the accompanying figures, or circular, or any other possible geometry for aesthetic or functional requirements.

From the perimeter edge of the upper surface 13 develops a peripheral surface 14 which extends towards the connecting body 3. As shown in figure 5, note that the peripheral surface 14, in collaboration with an inner surface 15 of the lid 4 opposite to the aforementioned upper surface 13, defines a housing compartment 15a, for containing the dispensing nozzle 5.

Additionally, the peripheral surface 14 presents at its angular portion an opening 16 for the passage of the dispensing nozzle 5.

Advantageously, the depth of the peripheral surface 14 is such as to completely contain the geometry of the nozzle 5.

The opening 16 is constituted by a window which is to allow the exit of the nozzle 5 once the head 1 is operated. Consequently, said opening 16, having for example rectangular conformation, presents a geometry that can be coupled with the nozzle 5.

On the inner surface 15 are present two lateral walls 17a, 17b positioned parallel to the side of the peripheral surface 14 that is to be coupled with the nozzle 5.

The first wall 17a starts at the opening 16, whilst the second wall 17b, positioned in line with the first wall 17a, extends until it is integral to the peripheral surface 14 as shown in figure 5.

The walls 17a and 17b therefore define a flow channel of the nozzle 5 and they can present undercuts to maintain the nozzle 5 fastened to the lid 4.

The second part 17b also presents an arresting element 18 with appropriate geometry, which engages the nozzle 5 when it is in closed position.

From the inner surface 15 of the lid 4 extends also a cylindrical element 19 which develops within the aforementioned tubular connecting body 3.

In particular, the cylindrical element 19 is constituted by an outer conduit 20 and an inner conduit 21 positioned concentrically. The axis of the cylindrical element 19 corresponds to the central axis of the dispenser 2, the inner conduit 21 coupling with the stem of the dispenser 2 by means of appropriate undercuts, which are known and therefore not further described and illustrated.

In the upper part of the cylindrical element 19 is present a cavity 22 for the passage of the liquid product, obtained on the lateral surface of the element 19 itself and positioned in radial direction from the inner conduit 21 towards the outer conduit 20.

In the space between the inner conduit 21 and the outer conduit 20 are obtained two lateral projections 23 positioned diametrically opposite and perpendicular to the direction of the channel 22 for the passage of the product, so that respective lateral surfaces of the projections 23 interface with the slots present in the pump of the dispenser 2, according to a known methodology for opening/closing the head 1.

As mentioned above, the lid 4 is rotatably associated to the body 3 to be able to rotate between an operating condition in which the projections 23 are slidable in the aforesaid slots to allow the vertical actuation of the lid 4, and a non operating condition in which the projections 23 abut on an abutment plane of the pump of the dispenser 2 to block the vertical actuation of the lid 4.

Moreover, within the inner conduit 21 is present a certain number of stops 24 able to interface with the stem of the dispenser 2 to prevent an excessively low fitting during assembly.

The outer conduit 20 has a lower height than the inner conduit 21; the height of the outer conduit is such as to enable the rotatable coupling with the connecting body 3.

The dispensing nozzle 5 presents substantially elongated conformation and comprises a first end 25 provided with an inflow opening 25a of the liquid product, and a second end

26, opposite the first 25, provided with an outflow opening 26a of the liquid product.

The inflow opening 25 a and outflow opening 26a are mutually connected by means of a passage conduit 27 internal to the nozzle 5, able to put the openings in fluid communication with each other.

The nozzle 5 is housed in the aforesaid compartment 15a and it is associated to respective actuating means 28, better described hereafter, to move the nozzle 5 between a position of use (figures Ib, 3b, 5b, 6b) in which it projects from the overall dimension of the closing lid 4, and a position of non-use (figures Ia, 3a, 5a, 6a) in which it is retracted within the overall dimension of the lid 4.

Note that the second end 26 of the nozzle 5 has such a profile that, when the nozzle 5 is in closed position, no part of the nozzle 5 itself projects from the peripheral surface 14 of the lid 4, in accordance with the recognised benefits of the invention, for aesthetic purposes the profile of the second end can faithfully reproduce the trajectory of the peripheral surface 14.

The inflow opening 25a is preferably obtained in a lateral area of the nozzle 5 and it presents, without limitation and not exclusively, rectangular section.

Correspondingly to the inflow opening 25a is present a coupling surface 29 with concave circular profile. The diameter of the profile is slightly smaller than the interface diameter with the channel 22 for the passage of the liquid product, in such a way as to assure a coupling that is free of play when the head 1 is in the condition of use (figure

6b).

With particular reference to figures 3a, 3b and 5a, 5b, note that the actuating means 28 of the nozzle 5 comprise a guiding rod 30 projecting from the upper portion 9 of the connecting body 3. The rod 30 is inserted between a front part 31 and a rear part 32, both projecting from an upper surface of the nozzle 5 facing the aforesaid inner surface

15 ofthe lid 4.

The front wall 31 and the rear wall 32 define a seat 33 which preferably has trapezoidal profile. The position and the geometry of the seat 33 is such that, when the rod 30 engages the front wall 31 , as a result of a relative rotation of the lid 4 with respect to the body 3 (operating condition of the lid 4), the entire nozzle 5 is thrust forward to the position of use in which the inflow opening 25a is at the channel 22 for the passage of the product of the lid 4.

Vice versa, when the rod 30 engages the rear part 32 the relative rotation between the lid 4 and the body 3 (non operating condition of the lid 4) determines the rearward translation of the nozzle 5, to the position of non-use.

It should also be noted that, in the position of non use of the nozzle 5, the lid 4 rotates bringing the aforesaid passage channel 22 to abut on the inner wall 6 of the annular wall 10. In this situation, the channel 22 is occluded and isolated, preserving the fluid product from contact with the outside environment.

Consequently, the rotation of the lid 4 to the respective operating condition determines, simultaneously, the extraction of the nozzle 5 (position of use) and the positioning of the passage cavity 22 at the groove 12, whilst the rotation of the lid 4 to the respective non operating condition simultaneously determines the insertion of the nozzle 5 into the respective compartment 15a (position of non-use) and the positioning of the cavity 22 at the annular wall 10.

Additionally, the actuation of the lid 4 to the operating/non-operating condition also determines the positioning of the lateral projections 23 from a situation in which it cooperates with the pump of the dispenser 2 and a situation in which they are blocked by abutment surfaces of the pump.

With particular reference to figures 7a through 14, a second embodiment is illustrated of a dispensing head 1 provided, as shall be more readily apparent hereafter in the present description, with a retractile dispensing nozzle 5 whose extraction and closure occur at a time that is previous or subsequent to the opening of the dispensing head 1. In particular, as shown in the exploded view of figure 8, in this embodiment too the head 1 is constituted by a connecting body 3, by a closing lid 4 and by a dispensing nozzle 5.

In this embodiment, the connecting body 3 presents substantially tubular shape, in which the upper portion 9 is defined by a disk 34 having a flat surface 35 facing the inner surface 15 of the lid 4, and a peripheral edge 36 that can be coupled to the peripheral surface 14 of the lid 4. The disk 34 presents circular geometry, and it centrally presents a hole 37 for the passage of the liquid product (figures 9 and 11).

On the flat surface 35 of the disk 34 are present two blind holes 38 positioned diametrically opposite to the hole 37.

In the assembled configuration one of said blind holes 38 engages the actuating means

28 of the nozzle 5, whilst the other one remains unused, hi this way, in accordance with the recognised benefits of the invention and in particular the simplicity of assembly it is possible to have to positions at 180° of orientation during assembly.

In this case, too, the connecting body 3 comprises an inner hollow conduit 39 and an outer hollow conduit 40 arranged concentrically, having the same height in the proposed embodiment. The entire connecting body 3 is positioned along the axis of symmetry of the dispenser 2. Between the outer conduit 40 and the inner conduit 39 are positioned two inner projections 41, diametrically opposite and meant to engage the corresponding slots present in the pump of the dispenser 2, according to known methodologies.

Advantageously, the connecting body 3 can be switched between an operating condition in which the inner projections 41 are slidable in the cavities of the pump, to deliver the liquid product along a channel 42 extending within the inner conduit 39 and ending in the aforesaid hole 37 (open position of the head 1); and a non-operating condition in which the inner projections 41 abut on the abutment plane of the dispensing pump of the dispenser 2, not to dispense the liquid product (closed position of the head 1).

The inner conduit 39 presents arresting rabbets 43 to prevent an excessively low fitting during assembly. In the proposed embodiment, four arresting rabbets 43 arranged circumferentially are provided.

With particular reference to figures 12 and 13, the nozzle 15 presents substantially elongated conformation and comprises a first end 44 provided with an inflow opening

44a of the liquid product, and a second end 45, opposite the first 44, provided with an outflow opening 45 of the liquid product. The inflow opening 44a and outflow opening

45a are mutually connected by means of a passage conduit 46 internal to the nozzle 5, able to put the openings in fluid communication with each other.

The first end 44 is defined by a hollow cylindrical element, whose inner diameter defines the inner opening 44a and is greater than the diameter of the hole 37, so that in operating position the product cannot flow through the port that would be present if the diameter of the inflow opening were smaller than the diameter of the hole 37. The total length of the nozzle 5 is such that, in the position of non-use, the front end, i.e. the second end 45, is placed in an annular edge 46a defining the passage opening 16 of the lid 4.

Note that in the present embodiment, the lid 4 presents the upper surface 13 having substantially circular peripheral development. The peripheral surface 14 presents an edge appropriately connected to the peripheral edge 36 of the disk 34 to enable the rotation of the entire lid 4 relative to the body 3.

On the peripheral surface 14 is obtained the opening 16 defined by the aforesaid annular edge 46a, to enable the exit of the nozzle 5. The opening 16 has such a geometry as to determine a loose coupling with the cross section of the nozzle 5.

In accordance with the present embodiment, the actuating means 28 of the nozzle 5 comprise a pivot 50 extending from the nozzle 5 and rotatably inserted in a respective blind hole 38.

In this way, as illustrated in the section view of figure 11, the nozzle 5 is housed in a respective compartment 15a and lies on the flat surface 35 of the disk 34, to be set in rotation around the pivot 50 as a result of the rotation of the lid 4 on the connecting body 3.

During the opening by the user, the lid 4 is set in rotation relative to the body 3; in this way, the annular edge 46 of the window 16 comes in contact with the second end 45 of the nozzle 5 setting it in rotation around the axis of the pivot 50, eccentric relative to the longitudinal axis of the dispenser. As a result of a 180° rotation, the nozzle 5 is placed in position of use, with the inflow opening 44a coaxial relative to the hole 37. In this position, the nozzle 5 partially projects from the respective containment compartment

15a.

During the closing actuation, the annular edge 46 comes in contact with the second end

45, thrusting the nozzle 5 in rotation until returning to the totally retracted position.

Moreover, on the inner surface 15 of the lid 4 are present a safety stop 47 and a guide element 48 of the nozzle 5 (figure 14). The safety stop 47 preferably has a "C" profile.

The outer diameter of said safety stop 47 is such as to match the first end 44 of the nozzle 5. The function of the safety stop 47 consists of engaging with very little interference with the upper portion of the first end 44 of the nozzle 5, when the head 1 is in the respective open position. In this way, a downward thrust is determined on the nozzle 5, located in the area of the inflow opening 44a, in order to avoid possible escapes of liquid product between the hole 37 and the inflow opening 44a during the normal use of the dispenser 2.

The guide element 48 is obtained with a "V" profile positioned along the diameter passing through the centre of the opening 16, with the concavity oriented towards the centre of the lid 4. The guide element 48 engages an upper pivot 49, extending from the nozzle 5 from opposite to the pivot 50, when because of the rotation of the nozzle 5, the nozzle is in the respective position of use. For this reason, the vertex of the "V" profile that constitutes the guide element 48 must match the position assumed by the upper pivot 49 when the nozzle 5 is completely extracted. In this way, the play present between the opening 16 and the opening 45a for the outflow of the fluid product, thereby positioning the nozzle 5 centred relative to the opening 16. The invention achieves the proposed objects and provides important advantages. Note that the dispensing nozzle 5 is extracted only at the user's discretion to dispense the liquid product. In this way, when packaging and stocking the finished product, the nozzle 5 can be kept within the size of the lid 4. Advantageously, the packaging and transport operations are simplified, preventing the nozzle 5 from damaging the heat- shrinking films and preventing any accidental engagement between the nozzles 5 of the dispensing heads 1 stored next to each other.

Moreover, stresses on the nozzle are avoided, which would mostly be due to the action of the heat-shrinking material that wraps the finished product, preserving the dispensing head 1 from malfunctions and disassembly.

An additional advantage is that the fluid product remains isolated from contact with the outside environment, preserving its integrity.

Note that the areas of interruption of the dispensing of the liquid product are located in proximity to the nozzle. Consequently, after the first dispensing operations, all the product contained in the stem and in the outflow channels of the head is isolated from the exterior.

Claims

1. Dispensing head for dispensers of fluid products comprising: a connecting body (3) presenting a lower portion (8) operatively engaged to a dispensing pump of a respective dispenser (2) of the fluid product; a closing lid (4) associated to an upper portion (9) of the connecting body (3) opposite to said lower portion (8); and a nozzle (5) for dispensing the liquid product, associated to said closing lid (4); characterised in that it further comprises means (28) for actuating the dispensing nozzle

(5) between a position of use in which it projects from the overall size of the closing Hd

(4), and a position of non use in which it is retracted inside the overall size of the closing lid (4).

2. Head as claimed in claim 1, characterised in that said closing lid (4) is rotatably associated to the upper portion (9) of the connecting body (3) to rotate around a respective axis relative to said connecting body (3); said actuating means (28) of the nozzle (5) co-operating with the closing lid (4) to actuate the nozzle (5) as a function of the rotation of the Hd (4).

3. Head as claimed in claim 2, characterised in that said Hd (4) comprises an upper thrust surface (13) for the escape of the liquid product and a peripheral surface (14) developing from the upper surface (13) towards the connecting body (3); said peripheral surface (14) presenting an opening (16) for the passage of the dispensing nozzle (5).

4. Head as claimed in the previous claim, characterised in that said Hd (4) comprises a compartment (15a) for housing said dispensing nozzle (5) defined at an inner surface (15) of the Hd (4) opposite to said upper surface (13).

5. Head as claimed in any of the previous claims, characterised in that said dispensing nozzle (5) comprises: a first end (44, 25) presenting an opening (44a, 25a) for the inflow of the liquid product; a second end (45, 26), opposite the first (44, 25), presenting an opening (45a, 26a) for the outflow of the liquid product; and a passage conduit (46, 27) developing within said nozzle (5) to put the openings in fluid communication with each other.

6. Head as claimed in claim 4 or 5, characterised in that said Hd (4) comprises a cylindrical element (19) extending from said inner surface (15) and developing within the connecting body (3); said cylindrical element (19) presenting a cavity (22) for the passage of the liquid product obtained on a lateral surface of the element (19).

7. Head as claimed in the previous claim, characterised in that said connecting body (3) presents substantially tubular conformation, said upper portion (9) comprising an annular wall (10) coaxial and external to said cylindrical element (19) of the lid (4) and presenting a groove (12) to put in fluid communication the passage cavity (22) obtained on the cylindrical element (19) with the inflow opening (25a) of the nozzle (5) when it is in the respective position of use.

8. Head as claimed in the previous claim, characterised in that said lid (4) is rotatable between an operating condition in which the nozzle (5) is in the position of use and the passage cavity (22) obtained on the cylindrical element (19) is positioned at the groove (12) to enable the passage of fluid within the nozzle (5), and a non operating condition in which the nozzle (5) is in the position of non use and the passage cavity (22) is positioned at the annular wall (10) to occlude the cavity (22) itself and prevent the passage of fluid towards the nozzle (5).

9. Head as claimed in the previous claim, characterised in that said cylindrical element (19) also comprises at least one lateral projection (23), extending from said lateral surface of the cylindrical element (19); said projection (23), in the operating condition of the lid (4), being slidable in a cavity of the dispensing pump and, in the non operating condition of the lid (4), abutting on an abutment plane of the dispensing pump.

10. Head as claimed in any of the previous claims, characterised in that said actuating means (28) of the nozzle (5) comprise a guide rod (30), projecting from the upper portion (9) of the connecting body (3) and inserted between a front wall (31) and a rear wall (32) both projecting from said dispensing nozzle (5).

11. Head as claimed in claim 10 when it depends on claim 8 or 9, characterised in that said rod (30), in the operating condition of the lid (4), abuts on the front wall (31) to bring the nozzle (5) outside the passage opening (16) and, in the non-operating condition of the lid (4), abuts on said rear wall (32) to bring the nozzle (5) within said housing compartment (15a).

12. Head as claimed in claim 4 or 5, characterised in that said connecting body (3) presents substantially tubular shape, said upper portion (9) comprising a disk (34) having a flat surface (35) facing the inner surface (15) of the lid (4) and a peripheral edge (36) able to be coupled to the peripheral surface (14) of the lid (4) itself.

13. Head as claimed in the previous claim, characterised in that said connecting body (3) also comprises an inner projection (41); said connecting body (3) being switchable between an operating condition in which the inner projection (41) is slidable in a cavity of the dispensing pump to dispense the fluid product along a channel (42) extending in the body (3) itself and a non-operating condition in which the inner projection (41) abuts on an abutment plane of the dispensing pump in order not to dispense the fluid product.

14. Head as claimed in claim 12 or 13, characterised in that said actuating means (28) of the nozzle (5) comprise a pivot (50) extending from said nozzle (5) and rotatably inserted in a blind hole (38) obtained in said flat surface (35) of the disk (34).

15. Head as claimed in the previous claim, characterised in that said second end (45) of the nozzle (5) is positioned in an annular edge (46a) defining said passage opening (16) to be set in rotation around said pivot (45) as a result of the rotation of the lid (4) on the connecting body (3) between the respective position of use and position of non use.

16. Head as claimed in the previous claim, characterised in that said nozzle (5) in the position of use presents the opening (44a) for the inflow of the fluid product positioned at a hole (37) for the passage of the product obtained on said flat surface (35) of the disk (34).

17. Head as claimed in the previous claim, characterised in that said pivot (50) determines an eccentric rotation of the nozzle (5) relative to the longitudinal development of the head (1).