JP2017512160A - Method for packaging and dispensing a product with a dosing nozzle - Google Patents

Abstract

In general, an apparatus for packaging and dispensing a fluid product comprises a rigid container (1) intended to contain a product (11) and a nozzle (3) with a flexible part engaging a rigid pedestal. And comprising. A movable actuating part (35), reinforced by an outer layer (40) so that it cannot be deformed, presses the dosing chamber (34) and a force is applied to the actuating part (35). Allows the product to be dispensed. The dosing assembly (2) is articulated and / or upon return to the outside of the outer layer (40) when no force is applied to the actuator (35), the outer layer (40) The rigid part (41) connected is included. Application for packaging and dispensing of aseptic products, especially pharmaceutical or cosmetic products.

Description

  The present invention relates to the technical field of packaging, and more particularly to be stored in a sealed and sterile condition without the addition of preservatives and dispensed in precise unit dosages using a dispensing assembly. It relates to the technical field of packaging and dispensing of intended liquid or viscous products.

  More particularly, an object of the present invention is an apparatus for packaging and dispensing sterile products, with a container intended to contain the product to be dispensed using a dispensing nozzle. The nozzle is a type of nozzle that prevents air from flowing in, and the container is equipped with such a nozzle.

This device for packaging and dispensing a product, generally a fluid product, typically comprises a dosing assembly adapted to dispense a dose of product. This dosing assembly is
-A nozzle with an actuating part that is movable between a resting position and an engaging position and that enables product distribution;
A rigid guide element, preferably in the form of a bar, preferably showing at least one abutment surface adapted to limit the displacement of the actuating part (and to define the engagement position);
-A distribution channel located along the guide element;
A first valve that allows the product present in the distribution channel to exit the nozzle when pressure is applied to the actuator;
A product dosing chamber that leads to the dispensing channel and is formed between the guide element and the actuating part;
Is provided.

  Such an apparatus is known from the document of US Pat. Relatively accurate dosing is obtained and the dosing assembly ensures bacteriological complete cleanliness at the nozzle tip.

  Conventionally structured packaging devices are also known that allow the product to be stored and dispensed in a number of times or any other form while keeping the product sterile or air-tight throughout its use.

  These devices are used in particular in the fields of pharmaceuticals, cosmetics and food, and more specifically there are devices used in the field of ophthalmology.

  They consist of a flexible or rigid container with a dispensing assembly that can be a flexible nozzle. This dispensing assembly is capable of dispensing a portion of the product and is designed to prevent the inflow of air into the container. The filter is associated with the device and may be on the bottom of the container or on the dispensing nozzle. This filter can be associated with an elastic valve located between the filter and the inside of the container to prevent contact between the product and the filter.

  Note that when a part of the product is discharged outside the container, a vacuum is created inside the container, and this vacuum must be compensated by the inflow of air equivalent to the volume of the discharged product. Should.

  In general, devices with flexible nozzles are not well suited for delivering accurate doses and / or the accuracy of the device decreases as the device is handled.

International Publication No. 2010/088951

  The primary objective of the present invention is to allow the product to remain sterile throughout the life of the device.

  The second object of the present invention is to provide a product with a very precise dosage, in particular to enable its use in the pharmaceutical field.

  A third object of the present invention is to combine the simplicity of operation for the user with the durability of the nozzle.

  More generally, the object of the present invention is to remedy the drawbacks of similar devices from the prior art and to propose a device that is more suitable for the various requirements of the art.

To this end, according to the invention, a device for packaging and dispensing of the type described above having a dispensing assembly suitable for dispensing a predetermined dose of product, the actuating part comprising:
-A first layer formed on the flexible part of the nozzle;
-A second reinforcing layer covering the first layer from the outside (and thereby strengthening the bearing area of the working part);
An apparatus having the characteristic of comprising:

  The dosing assembly includes a rigid portion to which the second layer of the actuating portion is coupled in an articulated and / or return motion to the outside of the second layer when pressure applied to the actuating portion ceases. Recognize that.

  The reinforcement layer can effectively prevent deformation of the first layer, which can modify the effective volume of the product discharged from the dosing chamber, and no more force is applied to the device Sometimes, this configuration of the dosing assembly is advantageous in that the connection of this reinforcing layer is actively involved in the return of the working part to the initial rest position.

  Thus, the device not only dispenses the exact product dose by simply pushing the flexible dispensing assembly integrated with the container, allowing the product to remain sterile, Similar to a stronger return action than using a single layer of flexible material, the same pressure is always generated in the device, which facilitates refilling of the product in the dosing chamber.

  According to one feature, the first layer is made of a first elastic material, and the second layer includes a second material that is preferentially stiffer than the first material (second material). Is a rigid plastic material such as, for example, polyethylene, polypropylene, or similar plastics that are stiff and less flexible if the threshold thickness is greater than millimeters). When a hinged connection is used to exert a restoring force, the portion that has been made flexible (typically by reducing its thickness) is less than the restoring force of the material of the flexible part. Consists of a material with a large restoring force. As a result, the elastic return for returning the operating portion to the neutral position is better than when only a flexible material similar to the elastomer is used. Thus, even after many doses have been dispensed, the return to the neutral position is constant and regular.

  According to another characteristic, the second layer and the rigid part form part of the same part obtained by plastic material injection. This part design allows a simple and economical hinge to be obtained. The second layer can elastically return outwards, advantageously pulling the first layer, so that the dosing chamber is filled accurately and regularly.

In various embodiments of the device according to the invention, the person skilled in the art may optionally adopt one and / or another of the following configurations.
The second layer is made of a rigid material attached to the first layer so as to make the working part fully deformation resistant, allowing local bearings on the shaft. The second layer, which allows reinforcement, can have a contour and shape similar to a fingerprint so that the bearing area on the actuation part can be fully identified.
The flexible part of the nozzle comprises a locally tapered part forming an elastic hinge, whereby each of the first and second layers of the actuating part is in the corresponding hinge region Connected (due to the double hinge effect, the flexible part can be repeatedly deformed without changing the accuracy of administration).
The nozzle extends along the longitudinal direction to the free end and the actuating part is movable radially inward until it abuts against the abutment surface.
The actuating part is longitudinally offset relative to the free end and the rigid part extends away from the free end;
The rigid part of the dosing assembly is annular and forms a nozzle tip opposite the free end;
The first valve is a check valve that prevents outside air from entering the distribution channel and allows the product to exit the nozzle from said free end side (thus the dose formed is typically In particular, it is controlled by the deformation of the flexible and elastic nozzle tip and discharged to the outside of the apparatus).
The dosing chamber is supplied with product from the container by a supply channel extending from a passage associated with a non-return-type second valve, which is the product (feed channel) while the actuator is elastically restored. Allows the dosing chamber to be filled while preventing the product from passing from inside the dosing chamber into the container when force is applied to the actuator.
The second valve is assembled on a rigid base different from the rigid part, the rigid part and the base being connected to each other and fixed to the container;
The container consists of two rigid parts of separately molded plastic material and can be sealed and assembled. One of them forms a nozzle support (the guide element may form part of this part) and the other part is an air inflow device or air inflow assembly (air inflow) provided with a filter and a valve. entry assembly) housing.
The nozzle is arranged around a central shaft seat formed from one part including the guide element, the dosing chamber being of a non-annular configuration and extending only from the actuator side, Angularly limited on the circumference.
The distribution channel is also angularly limited and extends only from the working part side.
The actuating part forms a push button, the first layer of the actuating part being configured to completely cover the abutment surface so as to completely empty the dosing chamber in the engaged position of the actuating part (Ensures that the same predetermined dose of product is dispensed).
The nozzle extends annularly around the longitudinal axis.
The actuating part formed in the side wall of the nozzle is arranged to be pushed laterally towards the longitudinal axis;
The nozzle comprises a deformable material from the side of the free end to form the flexible part, but may have an additional thickness to form the first layer of the working part. Thereby, the second layer can cover only a part of the first layer (so that a small part of the ring or any other shape is covered by the second layer extending the rigid part, The added thickness provides deformation resistance characteristics compared to the first layer).
-The thick part of the deformable part (additional thickness and thus relatively deformation-resistant) is located in the longitudinal direction at each of its sides and at each end of its axis, thin elastic Articulated around the part. When a force is applied by a lateral bearing, the inner shape of this relatively deformation-resistant thick part exactly matches the surface opposite the dosing chamber, whereby the chamber is completely emptied. It becomes possible to become.
-The device comprises a ventilation filtration unit that allows outside air to enter the container after a dose of product has been dispensed. The ventilation filtration unit preferably comprises a valve attached to the inner surface of the bottom surface of the container opposite the dosing assembly.
The filter provided for filtering the incoming air forms a barrier for bacteria present in the surrounding air. The filter can be present in various forms, overmolded or secured to the bottom of the container by any suitable means, or can itself be any suitable, such as overmolded, press fit or welded. Can be pre-assembled into a rigid plastic sheath that will be assembled to the bottom of the container by any means.
-According to a preferred option, the valve in the ventilation filtration unit provides an elastically deformable valve that cooperates with a pedestal located on the bottom of the container. This valve is held by means that allow the valve to be maintained when force is applied and is directed inside the container. Such an elastic valve allows the outside air to enter by elastically deflecting towards the inside of the container under the influence of outside air suction after a part of the product has been exhausted through the dosing assembly. Can effectively be prevented from coming out of the container through the air inflow passage.

  Other features and advantages of the present invention will become apparent from the following description by way of non-limiting example and with reference to the accompanying drawings, which represent embodiments and implementations of the subject matter of the present invention.

FIG. 2 is a schematic diagram of an axial cross section of a device according to the present invention, representing a container made of two rigid parts, sealed and assembled together, in cooperation with an air introduction assembly, said assembly comprising a filter, an air An elastic valve that allows inflow and prevents liquid from leaking through the air inflow passage, and similarly, the dosing assembly is compressed by an angular fan-shaped dosing chamber and a lateral bearing And an articulated actuating part. FIG. 2 represents a cross-sectional view of the device depicted in FIG. 1 showing the dosing chamber located on an angular sector and the articulated actuator in a rest position (when no force is applied anymore). FIG. 2b is a view similar to FIG. 2a showing the dispensing device when the actuating part is compressed and occupies its engaged position with respect to the rigid guide element. FIG. 2 is a view consistent with FIG. 1 and depicting the dispensing assembly when the dispensing assembly is in a rest position. FIG. 2 is a diagram consistent with FIG. 1 and showing an engagement position that leads to dose distribution.

  In the various figures, the same reference signs refer to similar elements of different embodiments shown and described.

  As shown in FIG. 1, the packaging and dispensing device includes a rigid container 1 with a bottom surface 7 and a tubular side wall 19. An air inflow assembly 20 is disposed on the bottom surface 7. Here, the air inflow assembly 20 comprises a filter 8, an elastic valve or similar valve 15 'associated with the pedestal 6, and one or more openings 9 and 18 as air passages. The rigid support piece S is sealed and assembled to the container 1, and the nozzle 3 having the flexible portion 25 is fixed to the rigid support piece S.

  Thus, in this non-limiting example, the internal volume of the container 1 is preferably defined by two rigid pieces 1 and S that are assembled in a sealed (airtight) manner, of separately molded plastic material. This internal volume filled with the product 11 can be communicated to the inside of the nozzle 3 by the hole 18 '.

  As can be clearly seen in FIG. 1, a dosing assembly 2 in which a rigid support piece S and a nozzle 3 (here having a generally tubular shape about a longitudinal axis X) are arranged in the extension of the container 1. Can be formed. The hole 18 ′ forms the inlet of this dosing assembly 2, and the outlet is formed on the free end 24 a side of the nozzle 3. The dosing assembly 2 may be narrower than the container 1 by providing a maximum outer circumference smaller than the outer circumference of the side wall 19.

  The threaded region 12 (which can be seen in FIGS. 3a-3b) is near the junction between the container 1 and the rigid part 41 forming part of the nozzle 3, preferably on the outer surface of the rigid part 41, Optionally provided. This allows a protective cap (not shown) covering the dosing assembly 2 to be assembled, typically extending the end 19a of the side wall 19.

  The dosing assembly 2 may comprise a rigid guide element 5, which can form an integral part of the rigid support piece S. In this non-limiting example, the guide element 5 forms an axial projection, preferably a rod-like, from the base 21 connected to the end 19 a of the side wall 19.

  The dosing assembly 2 here comprises an actuating part 35 formed on the outside of the nozzle 3 and shows an inner surface 25 a in contact with the product 11. This actuating part 35 is movable and suitable for squeezing the product 11 in the product dosing chamber 34 inside the dosing assembly 2.

  The valve 15 is configured so that when the force is applied to the chamber by the displacement of the actuating portion 35 (this compression is typically a push button depression), the product 11 contained in the dosing chamber 34 is transferred to the container 1. It can be assembled directly or indirectly on the rigid support piece S to prevent it from coming back in, but when the compression on the actuating part 35 stops, the liquid 11 from inside the container 1 to the dosing chamber 34 Allow passage. As actuator 35 elastically returns to the initial rest position, it creates a blank in dosing chamber 34.

  2b and 3b show the dosing assembly 2 when pressure is applied to the actuating part 35 (relative to deformation resistance in the bearing area due to its thickness) along arrow A. FIG. The chamber 34 is completely evacuated and the product 11 of the dose D is formed of a flexible material part of the nozzle 3 around the end 5a of the guide element 5, here in the shape of a bar. The dosing chamber 34 assumes a geometric shape corresponding to the inner contour of the actuating part 35 so that it can be discharged from the device by means of an opening. Extrusion out of the device is caused by circulation of the distal end of the distribution channel 10 along the elastic movable wall 24. The wall 24 temporarily extends away from the end portion 5a due to the influence of pressure. Here, the dose D is discharged parallel to the longitudinal axis X and the guide element 5 defines this axis in the form of a rod.

  The flexible material part (30, 31, 36, 36 ', 39, 39') is fixed to the rigid material part 41 by overmolding or by any other means such as welding, press fitting, etc. The This piece of flexible material preferably extends towards the free end 24a and is longer than the correct ergonomic width of the dosing assembly 2. Its length is sufficient to allow proper support by the user without being obstructed by the widened portion of the rigid piece 41 (forming the shoulder). In the longitudinal direction, the length L of this component (30, 31, 36, 36 ′, 39, 39 ′) is longer than at least half of the length of the support piece S. The layer 30 of the actuating part 35 can exhibit a length L30 in this longitudinal direction, which is more than half the length L of the flexible material part (30, 31, 36, 36 '). Short (or more generally not more than two-thirds of this length L). Preferably, this length L30 is longer than one third of the length L. The length L30 may correspond to the diameter when the operating portion 35 has a substantially circular outer periphery.

  When the bearing on the outer surface of the operating portion 35 stops, the movable portion 24 of the valve 4 formed at the tip of the nozzle 3 returns to the initial position opposite to the end portion 5a, thereby preventing the inflow of air.

  In order to allow compression, the dosing chamber 34 may be formed by a movable inner surface 25a and three fixed surfaces, one of the three fixed surfaces being formed by the guide element 5. This corresponds to the contact surface 37. It will be understood that the displacement of the actuating portion 35 can be limited by using one or more abutment surfaces 37 opposite the inner surface 25a.

  As can be clearly seen in FIGS. 2 a-2 b, here the other two fixed surfaces are formed by the two faces 38 and 38 ′ of the nozzle 3 (here the fixed sub-part 31 of the fixed subpart 31. Forming two opposing edges). The nozzle 3 extends the guide element 5 and extends radially outward from this guide element 5 for each elastic and thin hinge part 36, 36 ′. These hinge parts 36, 36 'at least partially surround the usable surface outside the layer 30 (here formed by the thickened part) in the longitudinal direction. When the actuating part 35 is squeezed, the hinge parts 36, 36 ′ are elastically deformed so as to very precisely coincide with the surfaces 38, 38 ′.

  With reference to FIGS. 1 and 3 a-3 b, complementary hinge components 39 and 39 ′ may be provided at each axial end of the thick portion forming the layer 30. Accordingly, the complementary hinge part 39 ′ is located at a position adjacent to the rigid part 41 and can form an extension of the hinge parts 36, 36 ′. Inner surface 25a, abutment surface 37 and surfaces 38, 38 'extend longitudinally from the inlet end 34a of chamber 34 to the outlet end. The inlet end 34 a leads to the hole 18 ′ by a supply channel 10 ′ located between a part of the rigid part 41 and the guide element 5. This inlet end 34 a is formed between the complementary hinge part 39 ′ and the guide element 5. The exit end is located on the free end 24a side. The supply channel 10 ′ and the distribution channel 10 are arranged so that the product 11 is movable between the hole 18 ′ and the movable part 24 of the valve 4 provided to form the outlet of the nozzle 3. To be formed on both sides of the dosing chamber 34.

  If the distribution channel 10 presents a non-annular part and extends only from one side along the guide element 5, the nozzle 3 provides a fixed sub-part 31 that is made in series with the flexible part 25 with the same material. can do. As shown in FIGS. 1, 2 a-2 b and 3 a-3 c, this fixed sub-part 31 is attached to the guide element 5 in a fan-shaped complementary angular sector in which the dosing chamber 34 extends and is preferably Is fixedly attached (preferably by overmolding).

  2a-2b show the dosing chamber 34 in cross-section, limiting the chamber 34 to an angled portion (eg, an angled fan of 120 ° or less). FIG. 2 b shows that due to the elastic extension of these hinge parts 36 and 36 ′, the abutment surface 37 follows its shape and the hinge parts 36 and 36 ′ with respect to the lateral edges or surfaces 38 and 38 ′. On the other hand, a preferred option is shown in which the inner surface 25a is in full contact. Here, the extension of the hinge parts 36, 36 ′ in the radial direction (direction of force by the bearing along the arrow A) is coupled with the return operation of the part including the second rigid layer 40 articulated to the rigid part 41. Due to its elasticity, it is completely reversible. Therefore, the stationary position of the actuator 35 is not changed in time and use, and the volume of the dosing chamber 34 remains the same.

  Referring now to FIGS. 1 and 3a-3b, the flexible portion 25 of the nozzle 3 is made of, for example, silicone, a flexible material or a plastic elastomer and is axially rigid here in an annular shape. Extending the part 41, a thin elastic part or similar valve 4 is provided which cooperates with the end 5a of the guide element 5 for dispensing a dose D of the product 11 when a force is applied to the device. The operating portion 35 includes an inner layer or a first layer 30 formed in the flexible portion 25 between the rigid portion 41 and the valve 4.

  As a non-limiting example, the rigid portion 41 is made of a rigid material (actually difficult to deform) such as a polyolefin-based rigid plastic such as polyethylene or polypropylene. Here it spreads in a ring around the longitudinal axis.

  In the embodiment of FIGS. 1 and 3 a-3 b, the parts forming the rigid part 41 are locally extended by axial projections forming the outer layer of the actuating part 35 or the second layer 40. In this example, the second layer 40 is not assembled on the first layer 30 of the actuating portion 35 but is part of the rigid portion 41. By superimposing the two layers 30 and 40, the thickness of the operating portion 35 (the portion having a thickness compared to the adjacent hinge parts 36, 36 ', 39, and 39') can be increased.

When the user presses the operating portion 35, it is bent due to the following.
Due to deflection to the position of the flexible part 42, which acts like a hinge (this part is thinner and / or to locally reduce the stiffness of the rigid material, Provided with notch).
The adjacent longitudinal hinge parts 36, 36 ′ formed on the outer periphery of the first layer 30 of the actuating part 35 and the hinge parts 39, 39 ′ located at each axial end of the actuating part 35; Due to elasticity.

  The actuating portion 35 is pushed down following the lateral bearing movement along the arrow A (shown in FIGS. 2b and 3b). Displacement toward the inside of the actuator 35 compresses the fluid product (low viscosity liquid or product, or similar substance) present in the dosing chamber 34. This inward movement causes the movable part of the check valve 15 to be pushed against the base 21 in order to close the inlet passage or hole 18 ′ leading to the inside of the container 1 very effectively. As a result, the deformation of the flexible movable part 24 (which opens the valve 4) causes the product 11 to become free of the free end 24a due to the thrust of the pressurized product enclosed in the dosing chamber 34. It is possible to exit from the side.

  As shown in FIGS. 2b and 3b, when the dosing chamber 34 is squeezed, the inner surface 25a is displaced exactly corresponding to the convex pedestal formed here by the abutment surface 37. More generally, when a force is applied to the dosing assembly 2, the internal shape of the actuator 35 can accurately correspond to the geometry of the dosing chamber 34.

  The elasticity of the flexible part 42 is related to the hinge parts 36, 36 ', 39 and 39' when returning the actuating part 35 to its initial rest position. The operating portion 35 is reinforced by the second rigid layer 40. As a result, after repeated use of the actuating part 35 of the nozzle 3, the product in the dosing chamber 34 can be effectively squeezed and discharged in the same way.

  In a preferred embodiment, the second layer 40 is formed by an axial projection extending from the shoulder, here the annular shoulder of the rigid part 41. The second layer 40 can prevent the user's finger from coming into direct contact with the first layer 30. For this reason, the second layer 40 can exhibit a surface that is as large or wider than the surface of the first layer 30 or is not allowed to allow direct bearings on the first layer 30. Reliefs can be formed with a sufficiently large space.

  The return to the rest position is here by means of the elastic return effect of the hinge parts 36, 36 ′, 39 and 39 ′, which is locally thinner than the first layer 30, and the part 42 made flexible. It is understood that it is advantageous to combine the return of the formed hinge to bending. For this purpose, the first layer 30 can be formed by overmolding, heat sealing, gluing, another similar attachment means, or by latching type mechanical engagement or by using clips. Can be firmly connected to the layer 40.

  Due to the return of the actuating part 35 to the rest position, the actuating part 35 generates a blank in the dosing chamber 34. This blank is connected to the opening of the valve 15 bent and removed from the support piece S, allowing the liquid product 11 to pass through the hole 18 ′ and into the filled dosing chamber 34. To do. Similarly, the passage of the liquid 11 to the chamber 34 provides a void in the space 33 of the container 1 that does not contain the product 11 that has the effect of lifting the valve 15 ′ from its pedestal 6, and through the air inflow assembly 20 (eg, a hole 9, through the filter 8 and the hole 18), air can flow from the outside to the inside of the container 1. Since the filter 8 holds any external bacteria, the air flowing into the container 1 is sterile and the product 11 is not contaminated. When the dosing chamber 34 is completely filled and the pressure balance between the inner space 33 and the outside of the container 1 is maintained, this inflow of air stops. Thus, the device is ready to be squeezed again and dispense the same dose.

  It is understood that the area of the junction between the first layer 30 and the second layer 40 is preferably obtained by fixing by any material fixing means at the interface between the two layers 30 and 40. The In the variation, the rigid protrusion forming the second layer 40 is connected only to the rigid portion 41 (formed integrally therewith), and the first layer 30 is adjacent to the rigid portion 41 and the container 1. It is caused only by the connection between the two. The rigid portion 41 may be made separately, for example, non-annularly, and may be added to the fixed part of the nozzle 3 (by bonding, overmolding, welding, or joining by any other means). In this case, the part 42 made flexible is preferentially formed and held in the intermediate region by a monoblock rigid piece.

  In another variant, the second layer 40 may be made in the form of a push button, connected to the first layer 30 or not attached to the first layer 30 by being attached to the latter. Good. The second rigid layer 40 is, for example, assembled within the cavity of the rigid portion 41 (there is no hinge option for the second layer 40) and compresses a spring or equivalent elastic return element. It will be appreciated that the connection between the second layer 40 and the rigid portion is configured to allow the second layer 40 to be moved inward and the dosing chamber 34 to be completely emptied. One or more abutment members are then used for this connection.

  The device may be small and is very suitable for dispensing liquid products of the same exact dosage or products with a little viscosity. The device is specifically designed for application in medicine, cosmetics or ophthalmology.

  It should be apparent to those skilled in the art that the present invention allows embodiments in many other specific forms without departing from the scope of the claimed invention.

  Thus, although the actuating part 35 has been described as being movable along a direction perpendicular to the longitudinal axis X, the actuating part 35 formed by the two layers 30 and 40 has a non-zero axial component. Or perhaps essentially along the axial direction (in the latter case, the actuating part 35 extends radially, for example an engagement position corresponding to a bearing on the part forming the base 21) It is understood that the geometry of the nozzle 3 can be modified. The dosing chamber 34 may then be adjacent to the valve 15. In such variations, the internal geometry of the actuating portion 35 preferably corresponds exactly to the geometry of the dosing chamber 34.

DESCRIPTION OF SYMBOLS 1 Rigid container 2 Dosing assembly 3 Nozzle 4 Valve 5 Guide element 5a End part 6 Base 7 Bottom face 8 Filter 9 Opening 10 Distribution channel 10 'Supply channel 11 Product 12 Threaded area 15 Valve 18 Opening 18' Hole 19 Side wall 19a End Part 20 air inflow assembly 21 base 24a free end 25 flexible part 30 first layer 34 product administration chamber 35 actuating part 36, 36 'hinge part 37 abutment surface 39, 39' hinge part 40 second layer 41 rigid part S support piece

Claims (11)

A device for packaging and dispensing a product, generally a fluid, comprising a rigid container (1) intended to contain said product (11) to be packaged and dispensed, and said product in a predetermined dose (D) A dosing assembly (2) suitable for dispensing said dosing assembly (2),
A nozzle (3) comprising an actuating part (35) movable between a resting position and an engaging position and adapted to actuate the dispensing of the product;
A rigid guide element (5), preferably rod-shaped, showing at least one abutment surface (37) adapted to limit the displacement of the actuating part (35) and to define the engagement position;
A distribution channel (10) located along said rigid guiding element (5);
A first valve (4) that allows the product present in the distribution channel (10) to exit the nozzle (3) when pressure is applied to the actuating part (35);
A product dosing chamber (34) formed between the rigid guiding element (5) and the actuating part (35) in communication with the distribution channel (10) and the supply channel (10 ');
In the apparatus, including
The operating part (35) includes a first layer (30) formed in a flexible part of the nozzle (3), and a second reinforcing layer (40) covering the first layer from the outside. And
When the dosing assembly (2) is articulated and / or upon return to the outside of the second layer (40) when the pressure applied to the actuator (35) stops, the actuator ( Including a rigid portion (41) to which the second layer (40) of 35) is coupled;
A device characterized by.   The first layer (30) is made of a first elastic material, and the second layer (40) comprises a second material that is stiffer than the first material. Equipment.   Device according to claim 1 or 2, wherein the second layer (40) and the rigid part (41) form part of the same part obtained by injecting a plastic material.   The flexible part (25) of the nozzle (3) includes a locally tapered portion that forms an elastic hinge, whereby the first layer (30) of the actuating part (35). And each of the second layers (40) is connected to a corresponding hinge region (36, 36 ', 39, 39', 42). .   The nozzle (3) extends along the longitudinal direction to the free end (24a), and the operating portion (35) is movable radially inward until it contacts the abutting surface (37). The part (35) is offset longitudinally with respect to the free end (24a) and the rigid part (41) extends away from the free end (24a). The device described in 1.   The first valve (4) prevents outside air from flowing into the supply channel (10) and allows the product to exit the nozzle (3) on the free end (24a) side. The device of claim 5, wherein the device is a check valve.   The product dispensing chamber (34) is supplied with product from the rigid container (1) by the supply channel (10 '), and a passageway (18') is provided with the product (11) when a force is applied to the device. ) Is associated with a non-return-type second valve (15) to prevent passage of the product dosing chamber (34) from the interior to the rigid container (1). ) Is assembled on a rigid base (21) different from the rigid part (41), and the rigid part (41) and the rigid base (21) are connected to each other and are connected to the rigid container (1). The device according to claim 1, which is fixed.   The nozzle (3) is arranged around a central seat formed from one part including the rigid guiding element (5), the product dosing chamber (34) has a non-annular configuration, and the actuating part The product administration chamber (34) is angularly restricted on the circumference of the rigid guide element (5) so as to extend only from the (35) side. Equipment.   The actuating part (35) forms a push button and the first layer (30) of the actuating part completely empties the product dosing chamber (34) in the engaged position of the actuating part. 9. The device according to claim 1, wherein the device is configured to completely cover the abutment surface (37) in the engaged position.   The nozzle (3) extends annularly around a longitudinal axis (X), and the actuating part (35) formed on the side wall of the nozzle (3) faces the longitudinal axis (X). The device of claim 9, wherein the device is arranged to be pushed radially.   After a dose of the product (11) has been dispensed, it comprises a ventilation filtration unit that allows outside air to enter the rigid container (1), the ventilation filtration unit preferably comprising the dosing assembly (2 11. The device according to claim 1, comprising a valve (15 ′) mounted on the inner surface of the rigid container (1) on the opposite side of.

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