LID FOR A CONTAINER.

Abstract

A lid (1) for a container comprises: a body (2), configured to engage and disengage relative to the neck of the container and includes an internally threaded side wall (21), which extends around a longitudinal axis (A) and a transverse wall (22); a retaining ring (3), including a retaining element (31), configured to engage a locking element on the neck of the container, and a joining portion (32), wherein the retaining ring (3) is attached to the lid body (2), the joining portion (32) being configured to tear along a perimeter surrounding the longitudinal axis (A) in response to a movement of the body (2) away from the retaining ring (3), wherein the lid (1) comprises a connecting window (4) which includes a connecting strip (40) and a film (400) which is thinner than the connecting strip (40).

Description

LID FOR A CONTAINER DESCRIPTIVE MEMORANDUM This invention relates to a lid for a container. The invention also relates to a method for producing a lid for a container. The invention also relates to a mold for producing a lid for a container. Conventionally, a container lid comprises a body configured to engage and disengage with respect to the container neck and a retaining ring configured to remain anchored to the container neck even when the body is disengaged. The body and retaining ring are joined together by a connecting portion that extends around a longitudinal axis of the lid and includes a series of bridges or hinges separated by windows and configured to tear open when the lid is first unscrewed, thus indicating that the container has been opened. Examples of such lids are described, for instance, in patent documents MO2010A000359A1 and MO2010A000360A1. However, these lids have the disadvantage of allowing the user to dispose of the lid body in the environment after opening the container, thereby creating a pollution issue. Caps are also known in the prior art, in which the cap body, after opening, remains connected to the retaining ring. In addition to the series of bridges intended to tear when the cap is opened, the joining portion of these caps includes a stable connection zone where the cap body is permanently connected to the retaining ring and remains connected to it even after the cap is opened. In these caps, however, the joining portion does not tear along the entire length surrounding the longitudinal axis but remains intact in the stable connection zone. Examples of such caps are described in patent documents US20180370701A1, US6474491B1, AU2019204356B1, US2002 / 001637A1, and WO2020 / 046849A1.These lids have several disadvantages: first, the stable connection area is relatively fragile and easily torn accidentally when the lid is open; also, when the lid is opened, the body tends to spring back into a position where it interferes with the neck of the container, thus making it awkward to empty the liquid out of the container. Another problem associated with lids of this type is that the stable connections (i.e., the ties) which connect the lid body to the retaining ring are sometimes short, i.e., not long enough to allow the lid body and the retaining ring to move well apart; as a result, the lid body tends to stay in place when the product is being emptied out of the container. Other disadvantages of these covers are that the connection area (where there are 7. Lcrnn / zznz / E / YiAi stable connections between the lid body and the locking ring) may not cover parts of the container neck, exposing them to external contaminants (such as dust or dirt) from the container production and distribution chains. These contaminants can settle and become embedded in the space between the container neck and the lid. Thus, a person taking a drink from the container could ingest these contaminants. This poses a hygiene and safety problem for the consumer. Another issue with prior art solutions is the difficulty in molding the cap because the plastic material does not always uniformly fill the stable connection zone, resulting in defective caps. Therefore, the cap shape must reconcile the need for practicality with the challenges involved in its molding. More specifically, regarding molding, it is essential that the mold be able to fill correctly, without obstructions or barriers hindering the flow of plastic within the mold. In this context, it is known that cap defects can result from a mold being filled by non-uniform flows, which vary significantly in temperature and / or pressure and / or volume index in different areas of the mold.Defects include what are known as weld lines, which form where the fronts of the fill flows do not mix properly and / or where reflow occurs. This description aims to provide a lid for a container, as well as a method and a mold for making it, overcoming the disadvantages of the previous technique mentioned above. This goal is fully achieved by means of the lid, method, and mold of this description as characterized in the appended claims. This description refers to a lid for a container. More specifically, this description relates to a plastic lid for containers such as water or other beverage bottles, oil containers, or containers for non-food liquids. This description, however, may also apply to lids made of different materials such as metals, for example. The container includes a body, which defines an internal space to hold a product, and a threaded neck. The lid comprises a body configured to engage and disengage relative to the neck of the container. The lid body includes a side wall (or skirt) extending around a longitudinal axis between a first and a second end (the first and second ends extending in a ring around the longitudinal axis). Preferably, the side wall is internally threaded; the lid is thus a threaded lid. The lid body includes a cross wall attached to the first end of the side wall. Preferably, the cross wall is oriented 7. Lcrnn / zznz / E / YiAi perpendicular to the longitudinal axis. The lid also comprises a retaining ring, configured to remain anchored to the neck of the container even when the body is detached from the neck. The retaining ring also extends around the longitudinal axis. The retaining ring includes a retaining portion configured to engage a locking element (or annular protrusion) on the neck of the container. The retaining ring includes a joining portion where the retaining ring is attached to the lid body. More specifically, the joining portion includes a plurality of bridges or hinges spaced apart from each other and a plurality of windows alternating with the bridges. The joining portion is configured to tear along a complete perimeter surrounding the longitudinal axis in response to movement of the body away from the retaining ring. It should be noted that the perimeter surrounding the longitudinal axis is preferably circular. It should be noted that to open the container, the user induces a rotation of the lid (more specifically, a rotation of both the lid body and the retaining ring, which are connected at the joining portion). Since the side wall of the lid body is internally threaded and engages with the corresponding thread on the container neck, rotating the lid causes it to shift along its longitudinal axis (specifically, away from the container body). The container neck includes a splice element configured to engage against the retaining portion of the retaining ring and to prevent its shift along the longitudinal axis (for example, the splice element may be in the form of an annular portion protruding from a wall of the container neck).Thus, when the user initiates rotation of the lid, the lid body and the retaining ring first move along the longitudinal axis until the retaining ring meets the joining element. After this, further rotation of the lid creates tension in the joining zone due to a force, directed along the longitudinal axis, which tends to move the lid body away from the retaining ring. This tension results in tearing of the joining zone (in particular, where present, the joining zone bridges are torn). Once the joining zone is torn, the lid body can continue to rotate and move away from the retaining ring until it is free from the thread and disengaged from the container neck, while the retaining ring remains engaged with the container neck. The cover also comprises a connection window, formed by a portion of the side wall of the cover body, a corresponding portion of the retaining element, and the section of the connecting portion interposed between them. The connection window has a first dimension, along the longitudinal axis, and a second dimension, along a perimeter surrounding the longitudinal axis. The connection window includes a connecting strip. Preferably, the length of the connecting strip is greater than the first dimension of the connecting window. This allows the connecting strip to fit the lid securely. 7. Lcrnn / zznz / E / YiAi move away from the safety ring. In one example, the connecting band may be entirely part of the body (i.e., the portion of the body that contributes to forming the connection window). Alternatively, the connecting band may be entirely part of the retaining ring (i.e., the portion of the retaining ring that contributes to forming the connection window). In a further alternative, the connecting band may belong partly to the body (i.e., the portion of the body that contributes to forming the connection window) and partly to the retaining ring (i.e., the portion of the retaining ring that contributes to forming the connecting band). It should be noted that when the lid is being opened, the connecting strip is subjected to mechanical tension to move from the first to the second working configuration. In one or more modes, when the lid is opened, the connecting strip deforms plastically and increases in length. In this context, the length of the connecting strip is greater than the first dimension of the connecting window in both the first and second working configurations. The connecting band has a first end connected to the side wall of the body and a second end connected to the retaining portion of the safety ring. The connecting band also has a first flank and a second flank, opposite the first flank. The connection window includes a film that is thinner than the second connecting strip. For example, the film may be less than 0.7 mm thick, specifically less than 0.5 mm thick, preferably less than 0.3 mm thick, and even more preferably less than 0.1 mm thick (e.g., 0.03 mm or 0.05 mm). The film is adjacent to the first and second flanks of the connecting strip to connect the first and second flanks of the connecting strip to respective portions of the side wall of the cap body of the retaining element surrounding the connection window. Preferably, the film is also thinner than the side wall portions of the cap body and the retaining element surrounding the connection window; thus, the film forms a gap in the side wall of the cap body. Conversely, the connecting strip is preferably substantially the same thickness as the portions of the side wall of the lid body and the retaining element surrounding the connection window. Thus, the connecting strip is raised above the film. Preferably, the connecting band does not project from the side wall of the lid body; in other words, the connecting band is substantially contained within a contour of the lid. Thus, in a top view of the lid (along a view parallel to the longitudinal axis), the connecting band is substantially not visible. It is observed that, in one example, the film (that is, the portion with reduced thickness) 7. Lcrnn / zznz / E / YiAi (compared to the connecting strip) is provided exclusively within the connecting window. In alternative examples, the film (i.e., one or more portions with reduced thickness compared to the connecting strip) may also be provided outside the connecting window. Therefore, generally speaking, the present description is not restricted to the situation where the film is provided exclusively within the connecting window, although this situation is one of the possible modalities. The lid can be installed in a first working configuration, where the remaining portion of the tamper-evident ring is engaged with the locking element on the container neck, the lid body is attached to the container neck, and the connecting portion of the tamper-evident ring and the film at the connecting window are intact. In this first working configuration, the film provides a seal that prevents air from passing between the outside environment and a defined space between the lid and the container neck. The lid can also be installed in a second working configuration, where the remaining portion of the tamper-evident ring is engaged with the locking element on the container neck, the lid body is detached from the container neck, the connecting portion of the tamper-evident ring and the film at the connecting window are torn, and the tamper-evident ring is attached to the body by the connecting strip. Specifically, the lid is in the first working configuration before it is opened for the first time and in the second working configuration after it has been opened. It should be noted that in the second working configuration, the bonding portion is torn along its annular profile (except for the area where the connecting strip is located); the film is also torn. The connecting strip remains attached to both the lid body and the retaining ring, even though the bonding area is torn.Thus, in the lid according to this description, the function of connecting the lid body to the safety ring to prevent the lid body from contaminating the environment and the tamper evidence function indicating that the container has been opened are two distinct functions performed by different parts of the lid: the connection function is performed by the connecting band and the tamper evidence function by the safety ring and the film. It should be noted that the tearing of the film reveals that the lid (i.e., the container) has been opened for the first time; thus, if the film is intact, the user is assured that the container has not yet been opened. Preferably, in the first working configuration, the connecting strip does not project from the side wall of the lid body and from the retaining portion of the safety ring (because it is retained by the film); on the contrary, in the second working configuration, the connecting strip projects from the side wall of the lid body and from the retaining portion of the safety ring, away from the longitudinal axis (even if the lid is closed). In one embodiment, the second dimension of the connection window is larger than the first dimension. Preferably, the length of the connection strip is greater than the second dimension of the connection window. More specifically, the connection strip may be inclined obliquely with respect to the sides of the connection window; alternatively, the connection strip may form a loop or a closed curve within the connection window. In one embodiment, the retaining ring includes a locking element and the cap body includes a protrusion extending radially away from the longitudinal axis; or conversely, the cap body includes a locking element and the retaining ring includes a protrusion extending radially away from the longitudinal axis. The locking element and the protrusion are longitudinally aligned in the first working configuration of the cap, such that in the second working configuration, the locking element is configured to engage the protrusion, thus holding the cap body in an inverted position relative to the retaining ring. Holding the cap body in an inverted position relative to the retaining ring prevents the cap body from obstructing a user who is emptying the liquid from the container or picking it up. More specifically, in one embodiment, the fastening element may be in the form of a tooth, extending radially from the longitudinal axis. In this case, the cap body may include a pair of protrusions that form a recess between them, which is adapted to receive the tooth; alternatively, there may be a single protrusion with a recess in it adapted to receive the tooth. In another configuration, the fastening element may be in the form of a recess configured to receive the protrusion. In one embodiment, the fastening element and the protrusion are machined on the side of the connection window. In another embodiment, the fastening element and the protrusion are machined on the outer side of the connection window and are separated from it at an angle. In one embodiment, in addition to the connection window, the lid comprises an additional connection window including an additional connecting strip. The additional connection window and the additional connecting strip include one or more of the features described with respect to the connection window and the connecting strip. Preferably, the respective second ends of the connecting strip and the additional connecting strip are arranged on the retaining portion of the retaining ring, at the ends of a circular arc of less than 180 degrees. In other words, the respective second ends of the connecting strip and the additional connecting strip are located on the same semicircle; in this way, the lid body can be moved away from the ring. 7. Lcrnn / zznz / E / YiAi of safety and overturn in relation to the semicircle. Preferably, if both the connection window and the additional connection window are provided, there is also a fastening element and a corresponding protrusion which are angularly separated from the connection window and the additional connection window (more specifically, preferably angularly equally spaced from these). Preferably, the fastening element is positioned between the second ends of the connecting strip and the additional connecting strip, relative to the circular arc within which the second ends are arranged. Thus, the fastening element is also located on the same semicircle as the respective second ends of the connecting strip and the additional connecting strip. In one embodiment, the second dimensions of the connecting window and the additional connecting window are each at least 60 degrees (or at least 55 degrees or at least 50 degrees) measured along an arc around the longitudinal axis. More specifically, in one embodiment, the connecting window, the additional connecting window, and the fastening element are equally separated angularly from each other. In this case, the fact that the respective second dimensions of the connecting window and the additional connecting window are each at least 60 degrees means that the respective second ends of the connecting window and the additional connecting window can lie on the same semicircle. The side wall of the lid body and the retaining ring define an inner surface oriented towards the longitudinal axis. In one or more embodiments, the connecting strip has a thickened zone that protrudes radially from the inner surface in a plane perpendicular to the longitudinal axis and passes through the joining portion. This thickened zone allows the joining area to be cut with a 360° cut from the outside. In effect, when cut from the outside, the thickened zone remains at least partially intact, so the connecting strip is not left with a loose end when the joining area is cut. In other modalities, in which the increased thickness zone is not provided, the joining zone is selectively cut in such a way as not to cut the connecting strip. The film includes a first portion of film, interposed between the first flank of the connecting strip and the respective portions of the side wall of the lid body and the retaining element surrounding the connection window; the film also includes a second portion of film, interposed between the second flank of the connecting strip and the respective portions of the side wall of the lid body and the retaining element surrounding the connection window. Thus, the first and second portions of film are separated by the connecting strip; theoretically, the first and second portions of film can be torn. 7. Lcrnn / zznz / E / YiAi independently of each other (although, in practice, both tear when the lid is opened). The invention also relates to a method for producing a lid for a container. The lid is preferably a lid conforming to one or more aspects of this description. The method comprises a molding step. Formed in the molding step is a lid body configured to engage and disengage relative to the neck of the container. The lid body includes a side wall that is internally threaded and extends around a longitudinal axis between first and second ends. The lid body also includes a cross wall attached to the first end of the side wall. Also formed in the molding step is a retaining ring configured to remain anchored to the neck of the container even when the lid body is disengaged from the neck.The safety ring includes a retaining portion, configured to engage a locking element over the neck of the container, and a joining portion, where the safety ring is attached to the lid body; the joining portion is configured to tear along a full perimeter surrounding the longitudinal axis in response to movement of the body away from the safety ring. The molding step also creates a connection window, formed by a portion of the lid body's side wall, a corresponding portion of the retaining element, and a section of the connecting portion interposed between them. The connection window has a first dimension, along the longitudinal axis, and a second dimension, along a perimeter surrounding the longitudinal axis. Within this perimeter, the connection window defines a connecting strip. The connecting strip has a length greater than the first dimension of the connection window and is attached to the lid body's side wall and the retaining portion of the retaining ring at its first and second ends, respectively.The connecting band is also separated from (or connected to) the remaining areas of the side wall of the lid body and the retaining portion of the safety ring by a film, which is thinner than the connecting band, and is adjacent to the first and second flanks of the connecting band to connect the first and second flanks of the connecting band to respective portions of the side wall of the lid body and the retaining element which surrounds the connecting window. In one embodiment, the forming step is carried out entirely by molding (injection or compression); therefore, the connecting band and film are created as one with the body and the retaining ring during (injection or compression or compression-injection or other method of) molding. It should be noted that the shape of the cap described here reconciles the need for the cap to be practical to use with the need for it to fill the mold correctly. Thus, the shape of the cap described here allows for the production of good quality caps that are substantially free of defects. 7. Lcrnn / zznz / E / YiAi More specifically, the forming step may comprise moving an upper unit and a lower unit toward each other along the longitudinal axis to define a forming cavity. The forming step may also comprise moving a drawer, the upper surface of which has a groove machined into it, in a direction transverse to the longitudinal axis. The transverse direction to the longitudinal axis is preferably oriented radially with respect to the longitudinal axis; thus, the drawer moves toward the longitudinal axis. When the upper unit, the lower unit, and the drawer are close together at a position where the mold is closed, the upper surface of the drawer defines the outside of the connection window. Preferably, the drawer's movement is mechanically synchronized with the movement of the upper and / or lower unit. For this purpose, moving the upper or lower unit causes the drawer to move. More specifically, the drawer has a contoured portion configured to interact with a corresponding matching contoured portion of the upper or lower unit such that a longitudinal movement of the upper or lower unit toward the closed mold configuration causes the drawer to move transversely toward the closed mold configuration. In this way, the drawer moves along the transverse (i.e., radial) direction toward the longitudinal axis from a retracted position to an advanced position; preferably, the drawer reaches the advanced position when the upper unit makes contact with the lower unit. As for the contoured portion of the box, this portion may, in one exemplary embodiment, have a frustoconical shape or a shape having at least one frustoconical generatrix, to come into contact with a corresponding coincident configured portion that also has a frustoconical shape, or a shape having at least one frustoconical generatrix. In another exemplary embodiment, the contoured portion may have the shape of a wedge having at least one inclined plane surface, to come into contact with a corresponding coincident configured portion that also has the shape of a wedge having at least one inclined plane surface. Thus, the movement of the drawer is synchronized with the movement of the upper and lower units in such a way that it initiates a load being pressed into the mold before the drawer has completed its forward movement to the closed position of the mold. Preferably, the following is also done during the training phase: - in the lid body, a fastening element (configured, for example, as a recess or a tooth); - on the safety ring, a protrusion (or a pair of protrusions), extending radially away from the longitudinal axis. Alternatively, in the training step, the following is also done: 7. Lcrnn / zznz / E / YiAi - on the lid body, a protuberance (or a pair of protuberances), extending radially away from the longitudinal axis; - in the safety ring, a fastening element (configured, for example, as a recess or a tooth). In both cases, the retaining element and the protrusion are positioned relative to each other such that the retaining element can engage the protrusion to hold the cap body in an inverted position relative to the retaining ring. More specifically, the retaining element and the protrusion are longitudinally aligned. In one embodiment, in the forming step, an additional connection window is made which includes an additional connecting band; preferably, the respective second ends of the connecting band and the additional connecting band are arranged in the retaining portion of the safety ring, at the ends of a circular arc of less than 180 degrees; the fastening element is interposed between the second ends with respect to that circular arc. After the forming step, the method may also comprise an incision step to make an incision along at least a portion of the joining portion of the retaining ring. The incision is made with a cutting device that can be configured to cut the joining area from either the inside or outside of the lid. Preferably, the incision is made from the outside (i.e., with a cutting device that surrounds the side wall of the lid body). In one embodiment, the incision is made by cutting along the entire perimeter of the joining portion from the outside. In this case, the side wall of the lid body and the retaining ring define an inner surface, oriented toward the longitudinal axis, and the connecting band has a zone of increased thickness, protruding radially from the inner surface in a cutting plane orthogonal to the longitudinal axis and passing through the joining portion. The zone of increased thickness is at least partially unaffected by the incision. Thus, the zone of increased thickness of the connecting band remains intact, even after the incision is made.Furthermore, in this mode, the cut made from the outside is an alternating cut, such as to make a plurality of small windows alternating with a plurality of bridges; the bridges constitute connecting portions which join the lid body and the safety ring (also towards the connection zone formed by the increased thickness zone). In another method, the incision is made selectively, interrupting it at least in the portion of the connecting strip located in the joining area. In this case, the increased thickness zone is not required. The incision is easily interrupted if the cut is made using a laser device. Furthermore, in this case, the incision can be made by cutting from either the inside or the outside. 7. Lcrnn / zznz / E / YiAi In other methods, the fragile zone is created during molding (for example, in injection molding, windows and bridges can be made using a specially configured mold). This invention also relates to a mold for making a lid. The lid is preferably a lid conforming to one or more aspects of this description. The mold moves between an open and a closed configuration. In the closed configuration, the mold defines a forming cavity. In the open configuration, the mold is configured to allow the lid to be removed. The forming cavity includes a side recess. The side recess includes a body zone that is internally threaded and extends around a longitudinal axis between a first and a second end. The side recess includes a joining zone that extends around the longitudinal axis and is connected to the second end of the body zone. The side recess includes a tamper-evident seal zone that extends around the longitudinal axis and is connected to the joining zone. The joining zone is thus interposed between the body zone and the tamper-evident seal zone. The joining zone defines a first passage between the body zone and the tamper-evident seal zone. The body zone is configured to form the side wall of the cap body; the joining zone is configured to form the joining portion of the retaining ring; the tamper-evident seal zone is configured to form the retaining portion of the retaining ring. The forming cavity includes a transverse recess, connected to the first end of the side recess body area. The transverse recess is configured to form the transverse wall of the lid body. The forming cavity also includes a connection zone formed from respective portions of the lid body, tamper-evident seal zones, and bonding zones. The connection zone includes a connection portion and a reduced-thickness zone surrounding the connection portion. The connection zone is configured to form the connection window. The connection portion is configured to form the connection strip. The reduced thickness portion is configured to form the film. The mold comprises an upper unit and a lower unit, which can be moved relative to each other along a longitudinal axis between a separate position, to define the open configuration of the mold, and a closed position together, to define the closed configuration of the mold. The mold comprises a drawer, the upper surface of which has a groove made therein, and the drawer can be moved in a direction transverse to the longitudinal axis such that when the mold is in the closed position, where the upper unit, the lower unit and the drawer are closed together, the upper surface of the drawer delimits the outside of the connection zone of the 7. Lcrnn / zznz / E / YiAi forming cavity. The transverse direction is preferably radial with respect to the longitudinal axis; thus, during mold closure, the drawer moves from a retracted position to an advanced position, towards the longitudinal axis. As mentioned previously, the drawer preferably has a contoured portion configured to interact with a corresponding matching configured portion of the upper or lower unit such that a longitudinal movement of the upper or lower unit toward the closed mold configuration causes the drawer to move transversely toward the closed mold configuration. Thus, the drawer does not require a dedicated actuator but is driven by the effect of the movement of the upper or lower mold unit. This simplifies mold construction and handling. In one embodiment, the mold comprises an additional drawer, the upper surface of which has a groove machined therein. The additional drawer is movable in a direction transverse to the longitudinal axis such that, when the mold is in the closed position, where the upper unit, lower unit, and additional drawer are closed together, the upper surface of the additional drawer defines the exterior of an additional connection zone (configured to form an additional connection window). More specifically, the additional drawer is configured to form the additional connection window, including the additional connection strip and the additional film. In one embodiment, the mold comprises an auxiliary drawer, which can be moved transversely to the longitudinal axis such that when the mold is in the closed position, with the upper unit, lower unit, and auxiliary drawer closed together, a top surface of the auxiliary drawer delimits the outside of a portion of the forming cavity to form at least one protruding zone and one contoured zone in the forming cavity. In one embodiment, the contoured zone is also protruding, so the auxiliary drawer is configured to form a first and a second protruding zone in the forming cavity. Thus, the auxiliary drawer is configured to form the clamping element, and the protrusion is configured to engage the clamping element to hold the lid in the inverted position. The clamping element may include a tooth; in this case, the contoured zone in the forming cavity is protruding. In one embodiment, the fastening element and the protrusion configured to couple the fastening element are made on the inside of the connection window; in this case, the drawer is configured to also form at least one protruding area and the contoured area. The drawer can move along a first transverse axis, oriented radially with respect to the longitudinal axis. The additional drawer, if provided, can move along a second transverse axis, also oriented radially with respect to the longitudinal axis. The auxiliary drawer, if provided, can move along a third transverse axis, also oriented radially with respect to the longitudinal axis. Preferably, the third transverse axis is interposed. 7. Lcrnn / zznz / E / YiAi between and angularly equidistant from the first and second transverse axes. More specifically, in one modality, the first, second, and third transverse axes are angularly equally spaced around the longitudinal axis. The additional drawer and / or auxiliary drawer may include one or more of the drawer features; more specifically, the additional drawer and / or auxiliary drawer may include a respective contoured portion which is configured to interact with a corresponding matching configured portion of the upper unit or lower unit such that a longitudinal movement of the upper unit or lower unit towards the closed mold configuration causes the additional drawer and / or auxiliary drawer to move transversely towards the closed mold configuration. As for the contoured portion of the auxiliary drawer and / or the additional drawer, in one exemplary embodiment, it may have a frustoconical shape or a shape having at least one frustoconical generatrix, to contact a corresponding coincident configured portion that also has a frustoconical shape, or a shape having at least one frustoconical generatrix. In another exemplary embodiment, the contoured portion may be in the shape of a wedge having at least one inclined plane surface, to contact a corresponding coincident configured portion that is also in the shape of a wedge having at least one inclined plane surface. These and other characteristics will become more evident from the following description of a preferred modality, illustrated by way of non-limiting example in the attached drawings, in which: - Figure 1 shows one version of a lid of this description, in a first working configuration; - Figure 1A shows a detail of the lid of Figure 1 in a second working configuration; - Figure IB shows a cross-section of a detail of the lid from Figure 1; - Figure 2 shows an additional modality of a lid of this description, in a first working configuration; - Figure 2A shows a detail of the lid of Figure 2 in a second working configuration; - Figure 2B shows a cross-section of a detail of the lid of Figure 2; - Figure 3 shows a mold of this description in a working position; Figures 4A and 4B show respective cross-sectional views of a box and 7. Lcrnn / zznz / E / YiAi an auxiliary drawer of the mold of Figure 3 in an open position and in a closed position, respectively; - Figures 5A and 5B show respective top views of a drawer, an additional drawer, and an auxiliary drawer of the mold of Figure 3 in an open position and in a closed position, respectively; - Figures 6, 7, 8, 9, 10, 11 show additional cover modalities of this description; - Figures 12A, 12B and 12C show the mold of this description at successive moments during its closing. With reference to the attached drawings, number 1 denotes a lid (or closure) for a container. The lid 1 comprises a body 2. The body 2 is configured to engage with the neck of the container to close the container and to disengage from the neck of the container to open the container. The body 2 comprises an internally threaded side wall 21 (i.e., comprising an internal thread) for connecting to a corresponding thread on the neck of the container. The side wall 21 extends around the longitudinal axis A. The side wall 21 is radially symmetric about the longitudinal axis A. The side wall 21 has a first end, annular in shape, and a second end, opposite the first end and also annular in shape. The body 2 comprises a transverse wall 22, oriented transversely to the side wall and connected to the first end of the side wall 21. The transverse wall 22 is circular in shape. The lid 1 comprises a retaining ring 3. The retaining ring 3 is configured to remain anchored to the neck of the container, even when the lid body 2 is detached from the neck. The retaining ring 3 includes a retaining portion 31 configured to engage a locking element over the neck of the container; the retaining portion 31 is annular in shape. The retaining ring 3 includes a connecting portion 32, where the retaining ring 3 is attached to the lid body 2. The connecting portion 32 includes a plurality of bridges or hinges which connect the retaining portion 3 to the cross wall 21. The bridges are separated from each other by a corresponding plurality of windows.The joining portion 32 is configured to tear along a complete (circular) perimeter surrounding the longitudinal axis A, in response to a movement of body 2 away from the safety ring 3 (due to unscrewing the side wall thread 21 on body 2 from the thread over the neck of the container). The cover 1 also comprises a connection window 4, formed from a portion of the side wall 21 of the cover body 2, a corresponding portion of the retaining element 31, and the section of the joining portion 32 interposed between them. The connection window 4 has a first dimension L1, along the direction of the longitudinal axis A, and a second dimension L2, along 7. Lcrnn / zznz / E / YiAi of a perimeter surrounding the longitudinal axis A. Preferably, the second dimension L2 is greater than the first dimension Ll. Connection window 4 includes a connection strip 40. Preferably, the length of the connection strip 40 is greater than the first dimension L1 of connection window 4. Preferably, the length of the connection strip 40 is greater than the second dimension L2 of connection window 4. The connecting band 40 extends between a first end 41, connected to the side wall 21 of body 2 and a second end 42 connected to the retaining portion 31 of the safety ring 3. The connecting band 40 has a first flank 43 and a second flank 44, opposite the first flank 43. The connection window 4 includes a film 400. The film 400 has a reduced thickness compared to the connection band 40; the film 400 is adjacent to the first and second flanks 43, 44 of the connection band 40 and connects the first and second flanks 43, 44 of the connection band 40 to the respective portions of the side wall 21 of the lid body 2 and of the retaining element 31 which surrounds the connection window 4. More specifically, in one or more modalities, film 400 includes a first portion of film 400A, connected to the first flank 4 of the connecting strip 4 and to respective portions of the side wall 21 of the lid body 2 and of the retaining element 31 which surrounds the connecting window 4. Film 440 also includes a second portion of film 400B, connected to the second flank of the connecting strip 40 and to respective portions of the side wall 21 of the lid body 2 and of the retaining element 31 which surrounds the connecting window 4. In one or more embodiments, the connection window 4 includes a plurality of connection strips 40 (for example, a first and a second connection strip 40), connected to film 400 (more specifically, to the first portion of film 400A and the second portion of film 400B). Where provided, the first and second connection strips 40 are preferably symmetrical about a longitudinal axis of the connection window 4, parallel to longitudinal axis A. Each connecting band 40 may be in the form of a loop or a closed curve within the connecting window 4. More specifically, each connecting band may include a first straight section, which begins at the first end 41, a second straight section, which reaches the second end, and a curved section interposed between the first straight section and the second straight section. In the case where a first connecting band 40 and a second connecting band 40 are provided, the respective curved sections may be located at opposite ends of the connecting window 4 with respect to the longitudinal axis of the connecting window 4. Alternatively, the first ends 7. Lcrnn / zznz / E / YiAi and the second ends can be located at opposite ends of the connection window 4 with respect to the longitudinal axis of the connection window 4. Preferably, the cap 1 includes a retaining element and a protrusion 52 extending radially away from the longitudinal axis A. In one embodiment, the retaining element is provided on the locking ring 3 and the protrusion 52 is provided on the cap body 2; in another embodiment, the retaining element is provided on the cap body 2 and the protrusion 52 is provided on the locking ring 3. The retaining element is configured to releasably engage the protrusion 52 to hold the cap body 2 in an inverted position relative to the locking ring 3. More specifically, in one embodiment, the fastening element defines a recess 510 (or gap), configured to receive the protrusion 52. In another embodiment, the fastening element includes a tooth 51 and the protrusion 52 defines a recess (for example, the cap may include a pair of protrusions 52 defining the recess between them), where the recess of the protrusion 52 is configured to receive and retain the tooth 51. In one embodiment, the fastening element 51, 510 and the protrusion 52 are made inside the connection window 4. In another embodiment, the fastening element 51, 510 and the protrusion 52 are made on the outside of the connection window 4 (at a certain distance from it). In one embodiment, the cover comprises an additional connection window 4A, including an additional connecting strip and an additional film. The respective second ends 42 of the connecting strip 40 and the additional connecting strip (connected to the retaining ring 3) are arranged in the retaining portion 31 of the retaining ring 3, at the ends of a circular arc of less than 180 degrees (preferably less than 160 degrees). The fastening element 51, 510 (or, alternatively, the protrusion 52) is interposed between the second ends with respect to the circular arc. Preferably, the respective second L2 dimensions of the connection window 4 and the additional connection window 4A are each at least 60 degrees measured along an arc 'a' around the longitudinal axis A. It should be noted that the side wall 21 of the lid body 2 and the retaining ring 3 define an inner surface S that faces the longitudinal axis A. In one or more embodiments, the connecting band 4 has a zone of increased thickness 45, radially protruding from the inner surface S in a plane of cut orthogonal to the longitudinal axis A and passing through the joining portion 32. Thus, the inner wall S has a protrusion in the zone of increased thickness 45. Therefore, the inner wall S is not radially symmetrical. Thanks to the zone of increased thickness 45, the connecting band 4 remains intact even when the joining portion 32 7. Lcrnn / zznz / E / YiAi is cut from the outside of lid 1. This description also provides a mold 6 for forming lid 1. Mold 6 includes an upper unit 61 and a lower unit 62, which can move toward and away from each other along an axis of mold 6 which, operatively (when lid 1 is formed in mold 6), coincides with the longitudinal axis A. More specifically, the upper unit 61 and the lower unit 62 can move between a separate position, to define an open configuration of mold 6, and a closed position together, to define a closed configuration of mold 6. The lower unit 62 includes (or defines) a cavity. The cavity is configured to receive a charge 9 of extruded thermoplastic material. The upper unit 61 includes a core 611. The core 611 is configured to penetrate the cavity of the lower unit 62 when the mold 6 is in the closed configuration. More specifically, core 611 includes an inner core 611A, a central core 611B, and an outer core 611C. The outer core 611C surrounds the central core 611B, which in turn surrounds the inner core 611A. The inner core 611A, the central core 611B, and the outer core 611C can move relative to each other along the longitudinal axis A; more specifically, in one possible embodiment, the inner core 611A and the outer core 611C are stationary, while the central core 611B is movable. The upper unit 61 also includes an extractor 612, which surrounds the core 611 and can be moved relative to the core 611 (that is, relative to the inner core 611A, the central core 611B, and the outer core 611C) along the longitudinal axis A. The central core 611B includes a plurality of recesses configured to form the internal thread on the side wall of the cap. In a sequence in which mold 1 is open, there is first a downward movement of all components except the outer core 611C and the inner core 611A (in practice equivalent to an upward movement of the outer core 611C and the inner core 611A); at this stage, the center core 611B and the cavity of the lower unit 62 remain attached to the lid 1. After that, a specific actuator causes a downward movement of the lower unit 62 away from the upper unit 61 and from the lid 1, thereby releasing an outer wall of the lid 1; at this stage, the center core 611B remains attached to an inner wall of the lid 1.After that, the extractor 612 moves downwards and, being in contact with the upper edge of the cover 1, pulls the cover 1 downwards with it; first, the cover 1, pushed downwards by the extractor 612, pulls the central core 61 IB with it until the central core 61 IB reaches a stop shoulder (defined, for example, by the stationary inner core 611A). When the central core 61 IB reaches the stop shoulder, the extractor 612 continues moving downwards and (if necessary with the help of compressed air injected between the inner core 611A and the central core). 7. Lcrnn / zznz / E / YiAi 611B) elastically deforms the side wall of cap 1, until it extracts the internal thread from the recesses of the central core 611B and releases the inner wall of cap 1. To form the connection window 4, the mold 6 includes a drawer 63. The drawer 63 can be moved along a first transverse axis TI, oriented radially with respect to the longitudinal axis A. The drawer 63 (whose end is oriented towards the longitudinal axis A) has a top surface with a groove machined into it. When the mold 6 is in the closed position, where the upper unit 61, the lower unit 62, and the drawer 63 are closed together, the top surface of the drawer 63 defines the outside of a connection zone 73 of the forming cavity 7; the connection zone 73 is configured to form the connection window 4. In the illustrated form, drawer 63 has a contoured portion 630 which is configured to interact with a corresponding portion of the upper unit 61 (specifically, the extractor 612) such that a longitudinal movement of the upper unit 61 towards the closed configuration of mold 6 causes drawer 63 to move transversely towards the closed configuration of mold 6. Thus, drawer 63 is supported by the lower unit 62 but moved by the upper unit 61. More specifically, cover 1 includes an elastic device (e.g., a spring or a plurality of springs) associated with drawer 63 and configured to push drawer 63 into its retracted position, away from the longitudinal axis A. When contoured portion 630 comes into contact with upper unit 61, upper unit 61 applies a force to drawer 63 that moves it into the advanced position, toward the longitudinal axis A, and overcomes the force of the spring or springs. To form the additional connection window 4A, the mold 6 includes an additional drawer 65. The additional drawer 65 can be moved along a second transverse axis T2, oriented radially with respect to the longitudinal axis A. The additional drawer 65 (whose end is oriented towards the longitudinal axis A) has a top surface with a groove machined into it. When the mold 6 is in the closed position, where the upper unit 61, the lower unit 62, and the additional drawer 65 are closed together, the top surface of the additional drawer 65 defines the outside of an additional connection zone 74 of the forming cavity 7; the additional connection zone 74 is configured to form the connection window 4A. The additional drawer 65 also has a contoured portion which is configured to interact with a corresponding portion of the upper unit 61 such that a longitudinal movement of the upper unit 61 towards the closed configuration of mold 6 causes the additional drawer 65 to move transversely towards the closed configuration of mold 6. More specifically, cover 1 includes a spring-like device (e.g., a spring or a plurality of springs) associated with the additional drawer 65 and configured to push the additional drawer 65 into its retracted position, away from the longitudinal axis A. When the contoured portion of the 7. Lcrnn / zznz / E / YiAi The additional drawer comes into contact with the upper unit 61, the upper unit 61 applies a force on the additional drawer 65 that moves it towards the advanced position, towards the longitudinal axis A, and overcomes the force of the spring or springs. To form the clamping element 51, 510 and the protrusion 52 (if these are provided on the outside of the connection window 4), the mold 6 may include an auxiliary drawer 64, movable transversely towards the longitudinal axis A along a third transverse axis T3; when the mold 6 is in a closed position, where the upper unit 61, the lower unit 62 and the auxiliary drawer 64 are closed together, an upper surface of the auxiliary drawer 64 delimits the outside of a portion of the forming cavity 7 to form at least one protruding zone and one contoured zone in the forming cavity (the protruding zone being configured to form the protrusion 52 and the contoured zone being configured to form the clamping element 51, 510). The auxiliary drawer 64 also has a contoured portion which is configured to interact with a corresponding portion of the upper unit 61 such that a longitudinal movement of the upper unit 61 towards the closed configuration of mold 6 causes the auxiliary drawer 64 to move transversely towards the closed configuration of mold 6. More specifically, cover 1 includes an elastic device (e.g., a spring or a plurality of springs) associated with the auxiliary drawer 64 and configured to push the auxiliary drawer 64 into its retracted position, away from the longitudinal axis A. When the contoured portion of the auxiliary drawer comes into contact with the upper unit 61, the upper unit 61 applies a force to the drawer 64 that moves it into the advanced position, toward the longitudinal axis A, and overcomes the force of the spring or springs. Preferably, the third transverse axis T3 is interposed between and angularly equidistant from the first and second transverse axes TI, T2. In one modality, the first, second, and third transverse axes TI, T2, T3 are equally separated around the longitudinal axis A. In other modalities, the angle made by the third transverse axis T3 with the first transverse axis TI is equal to the angle made by the third transverse axis T3 with the second transverse axis T2 but less than the angle made by the first transverse axis TI with the second transverse axis T2. The interior of mold 6 defines a forming cavity 7 for forming lid 1 from charge 9. The forming cavity 7 includes a side recess 71, extending around the longitudinal axis A, and a transverse recess 72, oriented transversely to the side recess 71 and connected to one end of the side recess 71. The transverse recess 72 is configured to form the transverse wall 22 of lid 1. The side recess 71 includes a body zone 711, a bonding zone 712, and a tamper-evident zone. The body zone 711, the bonding zone 712, and a tamper-evident zone 7. Each of the security seals 713 extends around the longitudinal axis A (and is thus annular in shape). The bonding zone 712 is interposed between the body zone 711 and the tamper-evident seal zone 713. The body zone 711 has a first end connected to the transverse recess 72 and a second end connected to the bonding zone 712. It should be noted that the bonding zone 712 is configured to create the bonding portion 32 of the cap 1; the bonding zone 712 is configured to create a pre-weakened portion in the bonding zone 712 or, alternatively, the pre-weakened portion is created after forming (e.g., with a cutting device). The forming cavity 7 also includes the connection zone 73 formed from respective portions of the lid body zone 711, the joining zone 712, and the tamper-evident seal zone 713 confronted by the drawer 63. The connection zone 73 includes a connection portion (configured to form the connection strip 4) and a reduced thickness zone (configured to form the film 400) surrounding the connection portion. The forming cavity 7 may also include the additional connection zone 74 formed from respective portions of the lid body zone 711, the joining zone 712, and the tamper-evident seal zone 713 confronted by the additional drawer 65. The additional connection zone 74 includes a connection portion (configured to form the additional connection strip) and a reduced thickness zone (configured to form the additional film) surrounding the connection portion. The forming cavity 7 may also include the protruding zone and the contoured zone formed from respective portions of the lid body zone 711, the joining zone 712, and the tamper-evident seal zone 713 confronted by the auxiliary drawer 64. In one embodiment (not illustrated), the mold 1 comprises a plunger associated with the lower unit 62. The plunger can move relative to the lower unit 62 between a retracted position, where it acts in combination with the lower unit 62 to form the cavity that receives the charge 9, and an advanced position, where it at least partially occupies the cavity defined by the lower unit 62. The plunger can move along a respective axis, which can be parallel or transverse to the longitudinal axis A. The mold 1 can also comprise a pusher connected to the plunger to move it from the retracted position to the advanced position, thereby pressing the charge 9 so that the plastic material is forced to occupy the forming space 7. Instead of providing the pusher, the plunger can also be moved by the effect of the relative movement between the lower and upper units (by means of specific contoured portions). In this context, the lid formation step could include the following sub-steps: - place at least part of charge 9 in the formation cavity; - closing mold 1 to form an enclosed forming space delimited by the upper unit 61 and the lower unit 62; the step of closing the mold comprises moving the unit 7. Lower Lcenn / zznz / E / YiAi and the upper unit towards each other and simultaneously advance drawer 63 (and, if provided, additional drawer 65 and / or auxiliary drawer 64) from the retracted position to the respective advanced position; - Move the plunger from the retracted position to the advanced position to press the load 5 so that the plastic material is forced to occupy the forming space. The movement of the piston can be synchronized with the movement of the upper unit 61 and the lower unit 62 (therefore of drawer 63, additional drawer 65 and / or auxiliary drawer 64) towards each other, or it can be performed after the movement of the upper unit 61 and the lower unit 62.

Claims

1. A lid (1) for a container, comprising: - a body (2) configured to engage and disengage relative to the neck of the container and including a side wall (21), internally threaded and extending around a longitudinal axis (A) between a first and a second end, and a cross wall (22) attached to the first end of the side wall (21); a locking ring (3), configured to remain anchored to the neck of the container even when the lid body (2) is disengaged from the neck, and including a retaining element (31), configured to engage a locking element over the neck of the container, and a joining portion (32), wherein the locking ring (3) is attached to the lid body (2), the joining portion (32) being configured to tear along a perimeter surrounding the longitudinal axis (A) in response to a movement of the body (2) away from the locking ring (3),characterized in that it comprises a connection window (4), formed from a portion of the side wall (21) of the lid body (2), a corresponding portion of the retaining element (31) and the section of the joining portion (32) interposed between them, wherein the connection window (4) has a first dimension (L1), along the direction of the longitudinal axis (A), and a second dimension (L2), along a perimeter surrounding the longitudinal axis (A), and wherein the connection window (4) includes a connecting strip (40) which is longer than the first dimension (L1) of the connection window (4), the connecting strip (40) having a first end (41) connected to the side wall (21) of the lid body (2), a second end (42) connected to the retaining portion (31) of the locking ring (3), a first flank (43) and a second flank (44) opposite the first flank (43); and a film (400),which has a reduced thickness compared to the connecting band (40) and being adjacent to the first and second flanks (43, 44) of the connecting band (40) to join the first and second flanks (43, 44) of the connecting band (40) to respective portions of the side wall (21) of the lid body (2) and of the retaining element (31) which surrounds the connecting window (4), thus the lid (1) can be placed in a first working configuration, where the retaining portion (31) of the safety ring (3) is engaged with the locking element of the container neck, the lid body (2) is engaged with the container neck and the joining portion (32) of the safety ring (3) and the film (400) of the connecting window (4) are intact, and in a second working configuration, where the retaining portion (31) of the safety ring (3) engages the locking element of the container neck, the lid body (2) is detached from the neck of the container,The joining portion (32) of the safety ring (3) and the film (400) of the connection window (4) are torn and the safety ring (3) is attached to the lid body (2) by the connecting band 7. Lcrnn / zznz / E / YiAi (40)., 2. The cover (1) according to claim 1, further characterized in that the second dimension (L2) of the connection window (4) is greater than the first dimension (Ll) of the connection window (4), and wherein the length of the connection strip (40) is greater than the second dimension (L2) of the connection window (4).

3. The lid (1) according to claim 1 or 2, further characterized in that the locking ring (3) includes a clamping element (51, 510) and the lid body (2) includes a protrusion (52) extending radially away from the longitudinal axis (A), or conversely, wherein the lid body (2) includes a clamping element (51, 510) and the locking ring (3) includes a protrusion (52) extending radially away from the longitudinal axis (A), the clamping element (51, 510) and the protrusion (52) are longitudinally aligned in the first working configuration of the lid (1), such that, in the second working configuration of the lid, the clamping element (51, 510) is configured to engage the protrusion (52) to hold the lid body (2) in an inverted position relative to the locking ring (3).

4. The cap (1) according to claim 3, further characterized in that the fastening element (51, 510) is in the form of a tooth (51) extending radially from the longitudinal axis (A), and wherein the cap body (2) includes a pair of protrusions (52), defining between these a recess to receive the tooth (51).

5. The cover (1) according to claim 3 or 4, further characterized in that it comprises, in addition to the connection window (4), an additional connection window (4A) that includes an additional connection strip, wherein the respective second ends of the connection strip (40) and of the additional connection strip are arranged in the retaining portion (31) of the safety ring (3), at the ends of a circular arc of less than 180 degrees and wherein the fastening element (51, 510) is interposed between the second ends with respect to that circular arc.

6. The cover (1) according to claim 5, further characterized in that the respective second dimensions (L2) of the connection window (4) and of the additional connection window (4A) are each at least 60 degrees measured along an arc (a) around the longitudinal axis (A).

7. The lid (1) according to any of the preceding claims, further characterized in that the side wall (21) of the lid body (2) and the retaining ring (3) define an inner surface S oriented towards the longitudinal axis (A), and wherein the connecting band (4) has a zone of increased thickness (45), radially protruding from the inner surface (S) in a plane of cut orthogonal to the longitudinal axis (A) and passing through the joining portion (32).

7. Lcrnn / zznz / E / YiAi 8. The cover (1) according to any of the preceding claims, further characterized in that the film (400) includes: - a first portion of film (400A), interposed between the first flank (43) of the connecting strip (4) and the respective portions of the side wall (21) of the cover body (2) and of the retaining element (31) which surrounds the connection window (4); - a second portion of film (400B), interposed between the second flank of the connecting strip (40) and respective portions of the side wall (21) of the cover body (2) and of the retaining element (31) which surrounds the connection window (4).

9. A method for manufacturing a lid (1) for a container, comprising a mold forming step in which the following are manufactured: - a body (2) configured to engage and disengage with respect to the neck of the container and including a side wall (21), which is internally threaded and extends about a longitudinal axis (A) between a first end and a second end, and a cross wall (22) attached to the first end of the side wall (21); - a retaining ring (3), configured to remain anchored to the neck of the container even when the lid body is disengaged from the neck, and including a retaining element (31), configured to engage a locking element on the neck of the container, and a joining portion (32), where the retaining ring (3) is attached to the lid body,The joining portion (32) is configured to tear along a perimeter surrounding the longitudinal axis (A) in response to a movement of the body (2) away from the retaining ring (3), characterized in that the forming step creates a connection window (4), formed from a portion of the side wall (21) of the lid body (2), a corresponding portion of the retaining element (31), and the section of the joining portion (32) interposed between them, wherein the connection window has a first dimension (L1) along the direction of the longitudinal axis (A) and a second dimension (L2) along a perimeter surrounding the longitudinal axis (A), and wherein the connection window (4) defines a connection band (40) within it.the connecting band (40) being longer than the first extension (Ll) of the connecting window and being attached to the side wall (21) of the lid body (2) and to the retaining portion (31) of the safety ring (3) at a first and second end (41, 42), respectively, and being separated from the remaining areas of the side wall (21) of the lid body (2) and the retaining portion (31) of the safety ring (3) by a film (400) which has a reduced thickness compared to the connecting band (40) and is adjacent to the first and second flanks (43, 44) of the connecting band (40) towards respective portions of the side wall (21) of the lid body (2) and of the retaining element (31) which surrounds the connecting window (4).

10. The method according to claim 9, further characterized in that the forming step comprises: - moving an upper unit (61) and a lower unit (62) towards each other along the longitudinal axis (A) to define a forming cavity (7); - moving a drawer (63), the upper surface of which has a groove made therein, in a transverse direction towards the longitudinal axis (A), wherein, when the mold (6) is in the closed position, where the upper unit (61), the lower unit (62) and the drawer (63) are closed together, the upper surface of the drawer (63) delimits the outside of a connection window (4).

11. The method according to claim 10, further characterized in that the movement of the drawer (63) is mechanically synchronized with the movement of the upper unit (61) and / or the lower unit (62), the movement of the upper unit (61) or the lower unit (62) causing the drawer (63) to also move.

12. The method according to claim 10 or 11, further characterized in that the movement of the drawer (63) is synchronized with the movement of the upper unit (61) and the lower unit (62) in such a way that a load (9) begins to be pressed into the mold (6) before the drawer (63) has completed its forward movement to the closed position of the mold (6).

13. The method according to any of claims 9 to 12, further characterized in that the forming step also performs the following: - on the cap body (2), a clamping element (51, 510); - on the retaining ring (3), a protrusion (52), extending radially away from the longitudinal axis (A), or vice versa: - on the cap body (2), a protrusion (52), extending radially away from the longitudinal axis (A); - on the retaining ring (3), a clamping element (51, 510); the clamping element (51, 510) and the protrusion (52) are positioned relative to each other in such a way that the clamping element (51, 510) can engage the protrusion (52) to hold the cap body in an inverted position relative to the retaining ring. 14.- The method according to claim 13, further characterized in that the forming step creates an additional connection window (4A) including an additional connecting band, wherein the respective second ends (42) of the connecting band (40) and of the additional connecting band are arranged in the retaining portion (31) of the safety ring (3), at the ends of a circular arc of less than 180 degrees and wherein the clamping element (51, 510) is interposed between the second ends (42), with respect to that circular arc.

15. The method according to any of claims 9 to 14, further characterized in that it comprises, after the forming step, an incision step to create an incision along at least a section of the joining portion (32) of the safety ring (3), wherein one of the following conditions is true: i) the incision is made along the entire perimeter of the joining portion (32), wherein the side wall (21) of the cap body (2) and the safety ring (3) define an inner surface (S) oriented towards the longitudinal axis (A), and wherein the connecting band (40) has a protruding zone of increased thickness (45).Lcrnn / zznz / E / YiAi radially from the inner surface (S) in a cutting plane orthogonal to the longitudinal axis (A) and passing through the joining portion (32); the zone of increased thickness (45) is at least partially unaffected by the incision; i) the incision is made selectively interrupting it at least in the part of the connecting band (40) located in the joining zone (32).

16. A mold (6) for making a lid (1) for a container, movable between an open configuration and a closed configuration in which it defines a forming cavity (7), and which includes: - a side recess (71) which includes a body zone (711) which is internally threaded and extends around a longitudinal axis (A) between a first end and a second end, a joining zone (712) which extends around the longitudinal axis (A) and is connected to the second end of the body zone (711), a tamper-evident seal zone (713) which extends around the longitudinal axis (A) and which is connected to the joining zone (712), such that the joining zone (712) is interposed between the body zone (711) and the tamper-evident seal zone (713) and defines a passage between the body zone (711) and the tamper-evident seal zone (713);- a transverse recess (72), connected to the first end of the body zone (711) of the side recess (71), characterized in that the forming cavity (7) also includes a connection zone (73) formed from respective portions of the lid body zone (711), the joining zone (712) and the tamper-evident seal zone (713), the connection zone (73) including a connection portion and a reduced-thickness portion surrounding the connection portion.; 17.- The mold (6) according to claim 16, further characterized in that it comprises: - an upper unit (61) and a lower unit (62) that can be moved towards each other along the longitudinal axis (A) to define the forming cavity (7); - a drawer (63), the upper surface of which has a groove made therein, the drawer (63) can be moved in a direction transverse to the longitudinal axis (A) such that when the mold (6) is in the closed position, where the upper unit (61), the lower unit (62) and the drawer (63) are closed together, the upper surface of the drawer (63) delimits the outside of the connection zone of the forming cavity (7).

18. The mold (6) according to claim 17, further characterized in that the drawer (63) has a contoured portion (630) which is configured to interact with a corresponding portion of the upper unit (61) or the lower unit (62) such that a longitudinal movement of the upper unit (61) or the lower unit (62) towards the closed configuration of the mold (6) causes the drawer (63) to move transversely towards the closed configuration of the mold (6).

19. The mold (6) according to claim 17 or 18, further characterized in that it comprises: - an additional drawer (65), the upper surface of which has a groove made therein, the additional drawer (65) being movable in a direction transverse to the longitudinal axis (A) such that when the mold (6) is in the closed position, where the upper unit (61), the lower unit (62) and the additional drawer (65) are closed together, the upper surface of the additional drawer (65) delimits the outside of an additional connection zone (74);- an auxiliary drawer (64), which can be moved transversely towards the longitudinal axis (A) such that when the mold (6) is in the closed position, where the upper unit (61), the lower unit (62) and the auxiliary drawer (64) are closed together, an upper surface of the auxiliary drawer (64) delimits the outside of a portion of the forming cavity (7) to form at least one protruding zone and one contoured zone in the forming cavity (7);wherein the drawer (63) can be moved along a first transverse axis (TI), the additional drawer (65) can be moved along a second transverse axis (T2) and the auxiliary drawer (64) can be moved along a third transverse axis (T3), the first, second and third transverse axes (TI, T2, T3) being oriented radially with respect to the longitudinal axis (A), wherein the third transverse axis (T3) is interposed between, and angularly equidistant from, the first and second transverse axes (TI, T2).