HEAD FOR MANUFACTURING AN ELASTIC TUBE, AND TUBE COMPRISING SAID HEAD

Abstract

A head (1) for manufacturing an elastic tube intended to contain a liquid or paste-like product, having a reduced height (h7) in relation to its diameter (d) and comprising a base (2) configured to be fixed to a nozzle of an elastic tube, and a lid (3) hinged to the base (2) between an open position and a closed position, the head (1) comprising at least one immobilizing system having at least two clips (81) forming a projection of the lid (3), the clips being connected to each other by means of at least one continuous divisible bridge (82).

Description

HEAD FOR MANUFACTURING AN ELASTIC TUBE, AND TUBE COMPRISING SAID HEAD DESCRIPTIVE MEMORANDUM OF THE INVENTION The invention relates to a head for manufacturing an elastic tube, and also to a tube head, stopper, service cap, hinged stopper, or flip-top cap. The invention further relates to an elastic tube comprising said head. The elastic tube is adapted for storing and dispensing a fluid, creamy, or paste-like material. Generally, this material is used in the fields of cosmetology, food, household products, pharmaceuticals, or parapharmaceuticals. A tube head comprises a base configured to be mounted on the tube nozzle and a hinged cap attached to the base. This head ensures that the cap remains attached to the base and, therefore, to the tube, unlike a conventional dispensing head that can be attached anywhere. Furthermore, this head allows the user to operate the tube with one hand. The user simply needs to push with their thumb to open or close the cap relative to the base. Since the opening of the lid in relation to the base is designed to be executed simply without requiring much effort, it is necessary to provide an immobilizing system at the level of the head that allows preventing accidental opening of the lid before use and thus also guarantees to the consumer that the product will not be opened before use. To form the locking system, prior art describes a solution consisting of a circular gasket or a tab that joins the lid to the base by means of its split points. The locking system can also take the form of a loop formed in the lid and designed to be inserted into an opening in the base; the loop is attached to the lid by means of a split bridge. In each of the solutions mentioned here, the split bridges are intended to be broken at the first opening of the service plug, thus allowing the lid to be released from the base. In the case of a tamper-evident system consisting of a tab, the resulting piece, after the split points are broken, becomes waste destined for disposal. Thus, the tab potentially becomes a source of environmental contamination. In some cases, the tab remains in place in an unsightly opening in the tube head. Even if the tamper-evident system consists of a circular gasket, it rests on the tube head. However, the gasket becomes useless thereafter and continues to be perceived as an obtrusive and unsightly element. The same occurs when the tamper-evident system consists of at least one cap clip that interacts with an opening in the base: after the split points are broken, the clip remains locked in the opening, resulting in an unsightly and unusable appearance. There is also a need for a tube head that includes an immobilizing system that reduces, at least partially, the aforementioned drawbacks. Thus, the invention proposes a head for manufacturing an elastic tube intended to contain a liquid or paste-like product. The head has a reduced height in relation to its diameter and comprises a base configured to be fixed to a nozzle of an elastic tube, and a lid mounted in an articulated manner on the base, between an open position and a closed position. The head comprises at least one immobilizing system comprising at least two clips that form a projection of the lid. The clips are connected to each other by means of at least one continuous divisible bridge. The term "continuous" refers to the fact that the bridge extends from one end of a first clamp to the end of a second clamp without any intervening third element. The term "divisible" refers to the fact that the bridge can be broken with minimal effort, unlike the clamps, which cannot be broken or detached from the lid with minimal effort. In other words, the term "divisible" is introduced in relation to the bridge, in contrast to the indivisible nature of the clamps and the permanent nature of the connection between the clamps and the lid. In this way, the invention allows the clips to remain attached to the lid and thus preserves, after the breakage of the dividing point(s), the overall appearance formed by the lid and the clips. Furthermore, the invention allows the clips to fulfill new functions after the breakage of the dividing point(s). Specifically, the clips, thus preserved in their integrity, can serve as a means of holding the lid in the closed position. The invention may also comprise any of the following features, individually or in any technically feasible combination: - the tamper-proof system comprises a pin formed at the base; - the at least one split bridge is designed so that, during the first closing of the lid, the clips cooperate with the base pin without the split bridge breaking and that, during the first opening of the lid, the split bridge breaks: - the pin is beveled to facilitate placement and maintain the tamper-evident system around the pin; - the pin extends in projection from a side wall of the base and in an orthogonal direction or in a substantially inclined direction relative to said side wall; - the point is formed in a free space formed in the side wall of the base; - the clips are intended to be housed in the free space formed in the side wall of the base when the lid is in the closed position; - the pin has an inclined front face, a convex top face, and a horizontal bottom face; - the convex upper face and horizontal lower face of the pin extend from a vertical face of the free space formed in the side wall of the base; - the inclined front face of the pin extends from the convex face of said pin; - the inclined front face comprises an upper portion and a lower portion that form a distal edge of the pin; - the loops extend from a lower edge of a side wall of the lid in a plane of said side wall; - the loops and the at least one divisible bridge form an opening intended to be placed around the pin; - the loops and the at least one divisible bridge form a concave inner face around said opening; - said concave inner face is intended to rest on the convex upper face of the pin; - the loops and the at least one divisible bridge form a substantially rectilinear inner face around said opening; - said rectilinear inner face is intended to be positioned with respect to the horizontal flat face of the pin; - the opening formed by the clips has a height greater than the height and depth of the pin to prevent any contact between the, at least one, divisible bridge and the pin during the placement of the clips around the pin; - the pin emerges from the opening formed by the clips when the opening is in the closed position; - at least one divisible bridge is thinner than at least two loops; - the, at least one, divisible bridge is configured to be broken during the first opening of the lid without any loss of material; - the, at least one, divisible bridge is located at a distance from a concave bottom of free space formed in the side wall of the base when the lid is in the closed position. According to a first aspect, the invention also relates to a tube comprising a tube head, such as the one described above, and an elastic nozzle. According to a second aspect, the invention may also comprise any of the following features, individually or in any technically feasible combination: - the nozzle is fixed directly to the tube head; - The nozzle is fixed to the tube head by means of high-temperature welding or overmolding. The invention will be better understood, and other details, features, and advantages of the invention will become apparent from reading the following description, which is provided by way of non-limiting example and with reference to the accompanying drawings, in which: - Figure 1 is a right symmetric perspective view of a tube comprising a head according to the invention in an open configuration; - Figure 2 is a left isometric view of the head according to the invention; - Figure 3 is a right-side profile view of the head according to the invention; - Figure 4 is a left profile view of the head according to the invention; - Figure 5 is an isometric perspective cross-sectional view of the head according to the invention; - Figure 6 is a rear isometric view of the head according to the invention; - Figure 7 is a bottom isometric perspective view according to the invention; - Figure 8 is a right isometric perspective view of the head according to the invention in a closed configuration; - Figure 9 is an isometric perspective cross-section view of the head according to the invention in a closed configuration; - Figure 10 is a left isometric perspective view of a detail from Figure 1; - Figure 11 is a right perspective view of Figure 10; - Figure 12 is an isometric perspective view of another detail from Figure 1; - Figures 13A to 13C illustrate different states of a tamper-evident head system according to the invention; - Figure 14 illustrates another state of the inviolability system of Figures 13A to 13C; - Figure 15 is an isometric perspective view of the tube head according to the invention, before a first opening. Typically, the central Y-axis is an axis that passes perpendicularly through the MA / t / ZUZJ / U 1 fOUÍ half of the tube head in a plane that includes a lower edge of the tube head. The central Y axis is located substantially equidistant from two diametrically opposite points of this edge. A direction orthogonal to the central Y axis is called the radial direction. In the detailed description of the following figures, without limitation, the terms upper and lower or high and low will be used, in reference to the central axis. Similarly, unless otherwise stated, the terms exterior or external and interior or internal are used in reference to the radial direction; an exterior element is radially farther from the central Y axis than an interior element. In the following description, the elements have an identical structure in which similar functions will be designated with the same reference numbers. As illustrated in Figures 1 to 9, the present invention relates to a head 1 for manufacturing an elastic tube 100 designed to contain a liquid or paste product. The head 1 comprises a base 2 and a cap 3. The base 2 is configured to receive a nozzle 50 of the tube 100. The cap 3 is hinged to the base 2 by means of a hinge 4 (as shown in Figures 1, 2, 4, and 6). Thus, the cap 3 can be moved between an open and a closed position (Figures 8 and 9). In the open position, the cap 3 is upright relative to the base 2. In the closed position, the cap 3 is folded against the base 2 and hermetically seals the elastic tube. Furthermore, the head 1 includes a tamper-evident system that prevents accidental opening of the cap 3 after its first use, thus guaranteeing the consumer that the tube will not be opened before this initial use. The tamper-evident system comprises at least one element formed at the cap and at least one element formed at the base. The elements of the tamper-evident system, as well as its operation, will be explained in the following description. With reference to Figures 1 to 8, the base 2 comprises an annular side wall 5 and a top wall 6 forming an internal volume V (primarily visible in Figures 5, 7, and 9). In particular, with reference to Figures 4, 5, and 6, the annular wall 5 comprises an upper edge 51 closed by the top wall 6. Furthermore, the annular side wall 5 comprises a lower edge 52 forming a lower opening for access to volume V. In the embodiment illustrated in Figures 4 and 6, the annular side wall 5 comprises an upper nozzle 53 and a lower nozzle 54. The upper nozzle 53 has a smaller diameter than the lower nozzle 54. Furthermore, the upper nozzle 53 is connected to the lower nozzle 54 by means of a joint 55. Thus, the upper nozzle 53, the lower nozzle 54, and the joint 55 give a stepped profile to the side wall 5 of the base 2. Specifically, as illustrated in Figure 4, the upper nozzle 53 has a first portion 531, said rear portion of constant height. In addition, the upper nozzle 53 has a second portion 532, said front portion. The front portion 532 of the upper nozzle 53 has a first region 532a of constant height, as well as two regions 532b positioned opposite each other on either side of the first region 532a. Only one region 532b of the front portion 532 is visible in Figure 4. Each of the regions 532b forms a ramp, said peripheral ramp. On the other hand, the annular side wall 5 has a free space 56 comprising a pin 7. In addition, the annular side wall 5 includes a flat portion 57 extended by a concave lower lip 58. The free space 56 and the flat portion 57 are formed at the level of the upper nozzle 53 of the annular side wall 5 and, more precisely, at the level of the front portion 532 of the upper nozzle 53. Referring to Figure 10, the free space 56 has a first face 56a that includes a pin 7, as well as a second face 56b perpendicular to the first face 56a. In the illustrated example, the first face 56a, said vertical face, extends perpendicularly to the upper wall 6 of the base 2. Furthermore, the first face 56a is convex and includes a curvature similar to a curvature of the upper nozzle 53. The second face 56b is concave and forms a U around the pin 7. The second face 56b is said concave face. Referring to Figure 10, pin 7 extends perpendicularly to the vertical face 56a of the clearance 56. In an unillustrated variation, pin 7 is arranged at an angle to the vertical face 56a of the clearance 56. Regardless of its orientation relative to the vertical face 56a of the clearance 56, pin 7 advantageously has a beveled shape. In the illustrated example, pin 7 comprises two flat front faces 71, 72 that extend at an angle to the vertical face 56a of the clearance 56. The flat front faces 71, 72 give pin 7 its beveled shape. The front face 71, the upper face, is connected to the vertical face 56a of the clearance 56 by means of a convex upper face 73 of pin 7.The front face 72, said lower front face, is connected to the vertical face 56a of the clearance 56 by means of a lower flat face 74 of the pin 7. The upper front face 71 and the lower front face 72 form an obtuse angle with each other. Furthermore, the upper front face 71 and the lower front face 72 form an intersection line 75 that corresponds to a distal edge of the pin 7. The lower front face 72 forms a chamfer between the upper front face 71 and the lower flat face 74. It should be noted that pin 7 has a maximum depth P1 that is defined between the vertical face 56a of free space 56 and the intersection line 75 along a line perpendicular to the vertical face 56a of free space 56. The maximum depth P1 of pin 7 is less than or equal to a depth P2 of free space 56. The depths P1 and P2 are represented in Figure 10. Referring to Figure 11, pin 7 has a height hl defined between a high point 73a of the convex upper face 73 and the flat lower face 74 of pin 7 along a line perpendicular to the convex upper face 73 and / or the flat lower face 74. The term "high point" refers to the highest point of the convex upper face 73. In addition, pin 7 has an upper portion 7A and a lower portion 7B defined on either side of the intersection line 75. The upper portion 7A of pin 7 has a height h2 defined between the high point 73a of the convex upper face 73 and the intersection line 75 of pin 7 along a line perpendicular to the intersection line 75 and / or the convex upper face 73.The lower portion 7B of pin 7 has a height h3 defined between the intersection line 75 and the lower flat face 74 of pin 7 along a line perpendicular to the lower flat face 74 and / or the intersection line 75. Again, referring to Figures 1 to 4, the upper wall 6 of the base 2 comprises a first platform, the raised platform 61, and a second platform, the lower platform 62. The raised platform 61 and the lower platform 62 are connected by a vertical cross wall 63 (visible in Figures 1 and 2). In the illustrated example, the vertical cross wall 63 extends over a diameter of the upper wall 6. The vertical cross wall 63 thus divides the upper wall 6 into two half-discs corresponding respectively to the raised platform 61 and the lower platform 62. In one variation, the vertical wall 63 is eccentric with respect to the central axis Y of the tube head 1. This results in an uneven distribution between the raised platform 61 and the lower platform 62. As best illustrated in Figures 1 and 2, the high platform 62 is adjacent to the rear portion 531 of the upper nozzle 53. The low platform 62 is adjacent to the front portion 532 of the upper nozzle 53. Furthermore, as best illustrated in Figure 9, the high platform 61 has an outer face 61a. The outer face 61a is opposite an inner face 61b illustrated in Figure 7. Finally, the high platform 61 has an edge comprising a curvilinear portion 61c and a rectilinear portion 61d. Referring again to Figures 1 and 2, the low platform 62 has an outer face 62a provided with two ramps 64, each formed at an angle between the low platform 62 and the vertical cross wall 63. The ramps 64 of the low platform 62 are adjacent to the peripheral ramps 532b of the upper nozzle 53. In addition, the low platform 62 has a dispensing orifice 65 extending into a growth 66. As best illustrated in Figure 7, the growth 66 extends into the volume V of the tube head 1. Furthermore, the growth 66 is formed on an inner face 62b of the lower platform 62. The term inner face (or, respectively, outer face) refers to the face oriented towards the internal volume V (or, respectively, the face opposite volume V). IVIA / t / ZUZÓ / UI / DU / Growth 66 allows the tube head 1 to be oriented, primarily in relation to a decoration and / or a longitudinal weld of a tube nozzle during tube manufacturing. In this way, thanks to growth 66, nozzle 50 can be fixed in a suitable position. Growth 66 thus constitutes a means of positioning the tube head 1. To ensure its function, the growth 66 has a portion 67, the protruding portion, which extends from volume V. The protruding portion 67 cooperates directly with the tube production line equipment and not with a tube component as is the case in the prior art. The protruding portion 67 is visible primarily in Figure 5. According to the configuration illustrated in Figure 5, the growth 66 has an upper proximal end 66a formed by the dispensing orifice 65 and a lower distal end 66b located at the level of the protruding portion 67. The main end 66a of the growth 66 is cylindrical. This shape has the advantage of being particularly strong. However, this shape limits access to the dispensing orifice 65 for the product contained in the tube equipped with the head 1. Advantageously, at least a portion of the growth 66 is semicylindrical. This semicylindrical shape, in turn, provides a sufficiently strong structure while still allowing easy access to the orifice 65 for the product contained in the tube equipped with the head 1. The proportion of the growth 66 that is cylindrical can vary depending on the dimensions of the head.According to the illustrated configuration, a large proportion of the growth 66 has the shape of a semicylinder, and not only the protruding portion 67. According to an unillustrated configuration, the entire growth 66 has the shape of a semicylinder. The projecting portion 67 has a height h4 defined between a horizontal plane containing the lower edge 52 of the base 2 and the lower end 66b of the growth 66 along a line perpendicular to said plane. Advantageously, the height h4 of the projecting portion 67 is between 1.5 and 6 mm. Also advantageously, the height h4 of the projecting portion 67 is between 2 and 4 mm. Also advantageously, the height h4 of the projecting portion 67 is between 2.5 and 3.5 mm. According to the invention, said height h4 allows for reliable positioning of the head 1. In the illustrated example, the dispensing hole 65, like the growth 66, is eccentric, i.e., it is radially offset in relation to the central Y axis of the tube head 1. To reinforce its structure, and as illustrated in Figure 7, the base 2 has at least one internal rib 9 in volume V. In the illustrated embodiment, the base 2 comprises two ribs 9a and 9b that extend radially in relation to the central axis Y. The ribs 9a, 9b are formed, diametrically opposite each other, substantially in proximity to the vertical transverse wall 63. ΜΛ / ΙΖ / ΖυΖΟ / υΊ ÍOUÍ Referring again to Figures 1 and 3, the lid 3 comprises a bottom 31 and a peripheral wall 32 extending perpendicularly to the bottom 31. The bottom 31 of the lid 3 has an outer face 31a (visible in Figure 3) and an inner face 31b, which is provided with a latch 33. The latch 33 allows the dispensing hole 65 to be formed airtight when the lid 3 is in the closed position. In the illustrated example 33, the latch 33 has a tubular shape with an outer diameter substantially similar to the inner diameter of the dispensing hole 65. The peripheral wall 32 forms an opening 34 located at the level of the hinge 4. As illustrated in Figure 6, the bottom 31 of the lid 3 is shaped like a half-disc. The bottom 31 has an edge 31c comprising a curved portion 35 and a straight portion 36. The curved portion 35 has a rounded high point 35 and is located opposite the hinge 4. The straight portion 36 is connected to the hinge 4. Furthermore, the peripheral wall 32 of the lid 3 extends the entire length of the curved portion 35 of the edge 31c and over at least a portion of the straight portion 36 of the edge 31c. More specifically, the peripheral wall 32 of the lid 3 extends over two portions 36 and 36b of the straight portion 36 of the edge 31b. A remaining fraction 36c of the rectilinear portion 36 of edge 31c is connected to hinge 4. In the illustrated version, the cover 3 occupies a substantial portion of the surface of the upper wall 6. In a non-illustrated variant, the cover 3 is eccentric with respect to the central axis Y of the head 1 and occupies less than a portion of the surface of the upper wall 6. This allows for a reduction in the size of the cover 3 and thus limits the amount of material required to manufacture the head 1. Referring again to Figure 1, the peripheral wall 32 of the lid 3 has a height h5 that exhibits different edge length profiles 31c of the bottom 31 of the lid 3. Thus, the peripheral wall 32 of the lid 3 has two regions 32a located opposite each other on either side of the hinge 4, in which the height h5 increases before becoming constant. The peripheral wall 32 of the lid 3 also has two other regions 32b, each extending from an adjacent region 32a. In each of the regions 32b, the height h5 increases relative to the adjacent region 32a. Between the regions 32b of the peripheral wall lies a central region 32c in which the height h5 is constant. Regions 32a extend respectively along fraction 36a and fraction 36b of the rectilinear portion 36 of the rim 31c. Fractions 36a and 36b are visible in Figure 6. Regions 32b of the peripheral wall 32 extend along the extremities of the curvilinear portion 35 of the rim 31c of the bottom 31 (illustrated in Figure 6). Regions 32b of the peripheral wall 32 of the opening 3 are designed to rest on the peripheral ramps 532b formed at the level of the upper nozzle 53 of the base 2 when the lid 3 is in the closed position. Referring again to Figure 2, the peripheral wall 32 of the lid has a flat portion 37 that extends perpendicularly to the bottom 31 of the lid 3. The flat portion 37 is located opposite the opening 34 formed by the peripheral wall 32 of the lid 3. More specifically, the flat portion 37 is at the level of the front region 32c of the peripheral wall 32 of the lid 3. Furthermore, the flat portion 37 and the bottom 31 of the lid 3 form a tab 38 designed to facilitate a user's grip on the lid 3 with their finger. The tab 38 corresponds to the rounded high point 35a of the rounded portion 35 of the bottom 31 of the lid 3. With reference to Figure 2, the peripheral wall 32 of the lid 3 has a lower edge 39 that is provided with a ring 8. More specifically, the ring 8 is formed at the level of the front region 32c of the peripheral wall 32. The ring 8 is designed to cooperate with the pin 7 when the lid 3 is in the closed position, primarily before the first use of the tube. In addition, the ring 8 is configured to be housed in the free space 56 formed in the upper nozzle 53 of the base 2. As best illustrated by Figure 12, the ring 8 comprises two facing loops 81 and a divisible point 82 connecting the loops 81. The loops 81 and the divisible point 82 thus define an opening 83 intended to be placed around the pin 7. In the following description and in relation to ring 8, the term internal (respectively, external) refers to a position close (respectively, distant) to the opening 83 of ring 8. The term front (respectively, rear) refers to a position turned outwards from cover 3 (respectively, inwards from cover 3). The clips 81 extend from the lower edge 39 of the peripheral wall 32 perpendicularly to the bottom 31. In this way, the ring 8 is perpendicular to the bottom 31 of the lid 3. In other words, the ring 8 extends along the peripheral wall 32 of the lid 3. Each loop 81 of ring 8 has a proximal edge 84a that is connected to the peripheral wall 32 of the lid 3 and, more precisely, to the lower edge 39 of said peripheral wall 32 of the lid 3. In addition, each loop 81 has a distal edge 84b that is connected to the dividing point 82. More specifically, the distal edge 84b of each loop 81 is connected to one end of the dividing point 82. In the illustrated example, each loop 81 of ring 8 comprises a front face 81a and a back face 81b. The back face 81b can be seen in Figure 2. The front face 81a and the back face 81b of each loop 81 are substantially non-curved and define a thickness l of said loop 81. The thickness l is substantially equal to a thickness of the peripheral wall 32 of the opening 3. Furthermore, each loop 81 of ring 8 comprises a concave inner face 81c and a convex outer face 81d. The front face 81a and the back face 81b of each loop 81 extend between the concave inner face 81c and the convex outer face 81d of said loop 81. The convex outer face 81d and the concave inner face 81c of each loop 81 of ring 8 define a width II that is variable between the proximal edge 84a and the distal edge 84b of said loop 81. More specifically, the width II of each loop 81 decreases from the proximal edge 84a to a distal edge 84b. In other words, the width II of each loop 81 has a maximum value at the proximal edge 84a of said loop 81 and a minimum value at the distal edge 84b of said loop 81. In fact, the concave inner face 81c and the concave outer face 81d of said loop 81 separate at the proximal edge 84a of each loop 81. The concave inner face 81c and the convex outer face 81d of said loop 81 converge at the distal edge 84b of each loop 81. In this way, each loop 81 has a crescent shape.The term length refers to a measurement taken from a direction parallel to the lower edge 39 of the peripheral wall 32 of the lid 3. In the illustrated example, the divisible point 82 has the form of a thin strip of material. The term "thin" refers to the fact that the thin strip of material has a thickness e2 that is weak relative to a width 13 and a depth P3 of said strip of material. The thickness e2 is defined between an inner and an outer face of the thin strip 82. The width 13 of the thin strip corresponds to a measurement taken between the distal portions 84b and the loops 81 along a direction parallel to the lower edge 39 of the peripheral wall 32 of the lid 3. The depth P3 is defined between a front and a back face of the thin strip 82. It should be noted that the thickness e2 of the thin strip 82 is similarly weak compared to the rest of the ring 8 and, specifically, compared to the clips 81, such that the breakage of this thin strip 82 is facilitated during the first opening of the cover 3. Furthermore, the depth P3 of the thin strip 82 is variable. Specifically, the depth P3 of the thin strip 82 has a maximum value at the ends of the thin strip 82, that is, at the junctions of the thin strip 82 and the clips 81. Conversely, the depth P3 of the thin strip 82 has a minimum value towards the midpoint 82 of the thin strip 82. In other words, the thin strip 82 forms a constriction at its midpoint 82a that corresponds to a minimum value of the depth P3. This constriction constitutes, during a first opening of the lid 3, a zone of concentration of restrictions that allow a localized rupture in the thin strip 82. It should be noted that the loops 81 and the divisible point form a U-shaped surface. More specifically, this external U-shaped surface is formed by the respective convex external faces 81d of the loops 81 and the external face of the divisible point 82. On the other hand, the respective concave internal faces 81c of the loops 81 and the internal face of the divisible point 82 give the opening 83 of ring 8 a concave profile at the level of an upper portion of said opening and a substantially rectilinear profile at the level of a lower portion of said opening 83. In this way, the defined opening 83 has a length 12 that extends between the respective concave internal faces 81c of the loops 81 and, specifically, between two planes respectively tangent to said faces 81c. The opening 82 also has a height h6 which is defined between the divisible point 82 and a line 85 joining the loops 81.It should be mentioned that the joining line 85 of the loops 81 extends perpendicularly to the respective front faces 81 of the loops 81. In the example illustrated in figure 12, the joining line 85 is represented by a simple arrow pointing towards its position. The height h6 defined by the opening 83 of ring 8 is greater than the depth PI and the height hl of pin 7. Similarly, the length 12 of the opening 83 is slightly greater than the length of pin 7. This makes it easier to place ring 8 in position around pin 7, specifically during the first closing of lid 3 on the base. To reinforce the structure of ring 8, and as illustrated in Figure 2, the opening 3 comprises at least one rib 31d formed in proximity to said ring 8. Specifically, the rib or ribs 31d are formed at an angle between the bottom 31 and the peripheral wall 32 of the cover 3. More precisely, the rib or ribs 31d are formed between an inner face 31b of the bottom 31 and an inner face 32d of the peripheral wall 32. In the illustrated embodiment, the cover 3 comprises two ribs 31d that are formed at the level of the front region 32c of the peripheral wall 32 of the cover 3. This arrangement of the ribs 31d primarily preserves the shape memory of ring 8 against the mechanical constraints induced by the action of pin 7 on said ring 8.The action of pin 7 on ring 8 refers to the resistance opposed to pin 7 in ring 8 during placement or during removal of ring 8 around pin 7. In the closed position of the lid 3, the peripheral wall 32 cooperates with the upper nozzle 53 of the base 2 to give the head 1 a generally cylindrical shape and a degree of design continuity between the base 2 and the lid 3. In this way, the peripheral wall 32 of the lid 3 rests on the front portion 532 of the upper nozzle 53 of the base 2. Specifically, zones 32be of the peripheral wall 32 of the lid 3 rest on the peripheral ramps 532b of the upper nozzle 53 of the base 2. Furthermore, the flat portion 37 of the peripheral wall 32 of the lid 3 aligns with the flat portion 57 of the upper nozzle 53 of the base 2. The flat portion 57 of the upper nozzle 53 of the base 2, as well as the flat portion 37 of the peripheral wall 32 of the lid 3, form a housing with a height designed to facilitate access and handling. from tab 38.Finally, the tab 38 formed on the lid 3 is positioned with respect to the lower lip 58 formed on the base 2. MA / t / ZUZÓ / U 1 fOUÍ On the other hand, the tab 38 formed on the lid 3 extends into a plane of the upper platform 61 of the base 2. In other words, the outer face 31 of the bottom 31 of the lid 3 is aligned with the outer face 61a of the upper platform 61 of the base 2. Furthermore, the bottom 31 of the lid forms a recess 69, illustrated in Figure 9, with the lower platform 62. On both sides of the hinge, the straight portion 36 of the bottom 31 forms, with the straight edge 61d of the upper platform 61, an area designed to facilitate the articulation of the lid 3 in relation to the base 2. Finally, with cover 3 always in the closed position, pin 7 opens opening 83 in ring 8. In fact, the depth P1 of pin 7 is greater than the thickness l of ring 8. The U-shaped outer face of ring 8 is positioned with respect to the concave bottom 56b of the free space 56. The outer face is located at a distance from the concave bottom 56b. The concave inner face of ring 8 is located with respect to the convex upper face 73 of pin 7. The lower inner face of the plane of ring 8 is positioned with respect to the lower flat face 74 of pin 7. The rear face of ring 8 is positioned with respect to the vertical face 56a of the free space 56. It should be noted that in the closed position of cover 3, the head 1 has a height h7 between 5 and 20 mm. Also advantageously, the height h7 of the tube head 1 is between 8 and 12 mm. Similarly, the height h7 of the tube head 1 is between 9.3 and 10.3 mm. The height h7 of the head 1 is defined between the outer face 61a of the high platform 61 and the lower edge 52 of the annular side wall 5. The height h7 of the head is relatively small, primarily in relation to a diameter of head 1, which is between 30 and 50 mm, and advantageously, between 35 and 45 mm. This height h7 gives head 1 a substantially flat design, which allows for limiting the amount of material. Advantageously, the d / h7 ratio is between 2 and 6. Also advantageously, the d / h7 ratio is between 3 and 5. A d / h7 ratio such as the one described above characterizes the substantially flat design of head 1. Preferably, the h7 / h4 ratio is between 1.5 and 5.5. Also preferably, the h7 / h4 ratio is between 2.5 and 4.5, mainly between 3 and 4. Advantageously, the tube head 1 is formed from a plastic material. The head 1 is obtained from a single piece, for example, by an injection molding process. The tube head is manufactured so that, after this operation, the cap 3 is in the open position relative to the base 2, as illustrated mainly in Figures 1 to 7. The principle of a cap 3 formed in the open position relative to the base 2 primarily allows for the formation of a pin 7 on the base 2 and the formation of the ring 8 on the cap 3. After manufacturing head 1, it is necessary to discard cover 3 on base 2 MA / t / ZUZÓ / U 1 fOUÍ and hold the two elements in position to allow the nozzle 50 to be fixed onto the head 1, then fill the tube 100 thus formed with a fluid or paste product. The lid 3 must be held in position on the base 2 until the first opening of the tube 100 by a user. This closed position is illustrated in figures 8 and 9. To keep lid 3 in the closed position on base 2 until its first use, ring 8 cooperates with pin 7. In this way, clips 81 and the split point 82 of ring 8 form the first means of the tamper-evident system. Pin 7 forms a second means of the tamper-evident system. The split point 82 also serves as evidence of whether tube 100 has already been opened. Its connection with clips 81 confirms that lid 3 has not yet been opened. For the purposes mentioned above, the ring 8 of the lid 3 is threaded around the pin 7 of the base 2 (see Figure 13A) during the initial closure of the lid 3 onto the base 2. The chamfered faces 71, 72 of the pin 7 facilitate this action, whereby only the concave upper portion of the opening 83 of the ring 8 is in contact with the pin 7. This preserves the integrity of the split point 82 and prevents its breakage. In fact, the concave upper portion of the opening 83 of the ring 8 defines a stronger area of ​​the ring 8 compared to a weaker area comprising the split point 82. Conversely, during the first opening of the lid 3 relative to the base 2, the split point 82 comes into contact with the pin 7. More specifically, the inner face of the split point 8 stops against the lower flat face 74 of the pin 7. Thus, as illustrated in Figure 14, when the impulse given to the lid 3 for its opening is sufficient, the breakable bridge 12 of the ring 8 deforms before breaking. The deformation of the split point 12 is made possible by the area formed between the outer face of the ring 8 and the concave bottom 56 of the free space 56. Figure 13B illustrates the breaking of the split point 82 after the first opening of the lid. Insofar as the split point 82 is less resistant than pin 7, the latter cannot be deformed by the former. Furthermore, due to the horizontal flat configuration of the lower face 74 of pin 7 and because the radius P1 / P3 is wisely selected between the depth P1 of pin 7 and the depth P3 of the split point 82, the ring cannot be completely unscrewed from pin 7. Advantageously, the pin depth P1 is at least twice the depth P3 of the split point 82. Thus, breaking the split point 82 is the only possible way to release the ring 8 from pin 7 and thereby proceed to an initial opening of the cover 3 relative to the base 2. To prevent this breakage of the split point 82, the user does not need to perform any additional action. The split point 82 is broken with a standard opening action of cover 3. In the illustrated version, opening cover 3 is achieved by pushing upwards on the tab. Advantageously, the breaking of the split point 82 is carried out without material loss. Furthermore, the breaking of the split point 82 is such that the structure and shape of the loops 81 forming the ring 8 are generally preserved. Specifically, the respective distal portions of the loops 81 retain an arched profile. This advantage is primarily achieved by choosing a loop length that decreases from the proximal to the distal edge. Similarly, this advantage is achieved thanks to the reduced thickness e2 of the split point 82 and the constriction provided according to the depth P3 of the split point, that is, in a direction perpendicular to the thickness e2 of the split point 82. After the breakage of the split point 82, the respective concave faces 81c of the loops 81 and the broken sections of the split point 81 form an open loop (see Figure 15). In this way, the tamper-evident element, in this case the ring 8, ensures an aesthetic function after the breakage of the split point 82. Furthermore, the distal portions of the loops 81, thanks to their arched profile, form spring hooks that can cooperate with the pin 7 to ensure that the lid 3 remains closed on the base 2 during subsequent closure of the lid 3 (see Figure 13C). Specifically, the spring hooks are formed at an angle upon contact with the pin 7 and then return to their initial shape once they are positioned around the pin 7.Thus, thanks to the invention, the tamper-evident system retains, after the breaking of the dividing point, a function to keep the lid in the closed position, whereas in the prior art, the elements of the tamper-evident system must be designed to be discarded or become unusable after the breaking of the dividing point. It should be noted that the solution of holding the lid 3 to the base 2, implemented by the flexible hooks and the pin 7, complements or replaces a fastening solution implemented by the tab 33 and the dispensing hole 65. To disengage the elastic hooks from pin 7 during a subsequent opening of opening 3, the user exerts less effort than that required to break the split point 82 during the first opening of lid 3. In this way, the decrease in the opening effort of lid 3 with respect to base 2 indicates to the user that a first opening of lid 3 has already occurred.

Claims

1. A head (1) for manufacturing an elastic tube designed to contain a liquid or paste-like product, has a reduced height (h7) in relation to its diameter (d) and comprises a base (2) configured to be fixed on a nozzle of said tube and on a cap (3) hinged to the base (2) between an open position and a closed position, the head (1) comprises at least one tamper-evident system having at least two clips (81) projecting from the cap (3), the clips (81) being connected to each other by at least one continuous divisible bridge (82).

2. - The head (1) according to the preceding claim, further characterized in that the at least one divisible bridge (82) is designed so that, during the first closing of the lid (3), the clips (81) cooperate with the pin (7) of the base (2) without the divisible bridge (82) breaking and that, during the first opening of the lid (3), the divisible bridge breaks (82).

3. The head (1) according to the preceding claim, further characterized in that the pin (7) is beveled to facilitate placement and to hold the clips (81) around the pin.

4. The head (1) according to the preceding claim, further characterized in that the pin (7) extends in projection from a side wall (5) of the base (2) in accordance with an orthogonal direction or in a substantially inclined direction relative to said side wall (5).

5. The head (1) according to the preceding claim, further characterized in that the pin (12) is formed in a free space (56) in the side wall (5) of the base (2), the clips (81) are designed to be housed in said free space (56) when the cover (3) is in the closed position.

6. The head (1) according to any of the preceding claims, further characterized in that the clips (81) extend from a lower edge (39) of a side wall (32) of the cover (3) in a plane of said side wall (32), the clips (81) and the at least one divisible bridge (82) form an opening (82) designed to be positioned around the pin (7).

7. The head (1) according to any of the preceding claims, further characterized in that said clips (81) and the divisible bridge (82) form a concave inner face (81c) and a substantially rectilinear inner face around the opening (83), the concave inner face (81c) being designed to rest on an upper convex face (73) of the pin (7), the rectilinear inner face being designed to be positioned with respect to a horizontal flat face (74) of the pin (7).

8. The head (1) according to the preceding claim, further characterized in that the opening (83) formed by the clips (81) and the at least one divisible bridge (82) has a height (h6) greater than a height (hl) and depth (Pl) of the pin (7) to prevent any contact between the at least one divisible bridge (82) and the pin (7) during the placement of the clips (81) around the pin (7); 9. The head (1) according to the preceding claim, further characterized in that the pin (7) emerges from the opening (83) formed by the clips (81) when the cover (3) is in the closed position.

10. The head (1) in accordance with any of the preceding claims, further characterized in that the at least one divisible bridge (82) is thinner than the clips (81).

11. The head (1) according to any of claims 2 to 10, further characterized in that the at least one divisible bridge (82) is configured to be broken during the first opening of the lid (3), without any loss of material.

12. The head (1) according to the preceding claim, further characterized in that the divisible bridge (82) is located at a distance from a concave bottom (56b) of the free space (56) made in the side wall (5) of the base (2) when the lid (3) is in the closed position.

13. A tube (100) comprising a tube head (1) according to any of the preceding claims, and an elastic nozzle (50).

14. The tube (100) according to claim 14, further characterized in that the nozzle (50) is fixed directly to the head (1) of the tube.

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