System, device and methods for forming multi-packs of beverage cans

Abstract

The present invention relates to a system (1) for forming multi-packs of beverage cans, an operating method, and a device (110) operable with the system, for forming multi-packs of beverage cans, said system integrating multiple functions in a single component so as to provide a simple and economical system. The invention comprises a conveying mechanism for moving two rows of parallel cans forward towards a dosing mechanism formed by two opposing gearwheels, which count the cans that pass in the direction of an applicator station (10) where a multi-template (A) is coupled to the upper plane of a batch of cans (B). Said applicator station (10) comprises a pressing mechanism (13) with a pressing plate (131) and an applicator plate (132), both having longitudinal edges with open notches (135, 137); a template feed mechanism (12) and a can positioning mechanism (11). The positioning mechanism (11) comprises: at least two multifunctional pivoting devices (110), arranged opposite each other, with one on each side of the rows of cans, and having a series of concave-curved recesses interspersed with separating portions of variable width for determining the lateral position between cans; a longitudinal protrusion having a rounded edge arranged on a lower face to guide the cans as they move forward; an eccentric longitudinal shaft oriented parallel to the line of forward movement of the cans so that said devices pivot between a can-holding position and a position for the guided release of the cans, and they comprise two pins (114) arranged perpendicular on an upper face, spaced apart from each other for the positioning of a multi-template on an upper plane of the group of cans. Said pins act as a template stop when the template is supplied by a horizontal retractable tray (121) that moves orthogonal to the line of forward movement, and they also retain the template (A) on the cans when said retractable tray (121) is retracted.

Description

[0001] System, device and methods for forming multi-packs of beverage cans

[0002] DESCRIPTIVE MEMORY

[0003] The present invention falls within the technical field of packaging. More specifically, the present invention relates to a system for forming multiple packs of beverage can-type containers; it relates to the method for forming the can packs using said system; and it relates to a multifunctional pivoting device operable with said system and method.

[0004] DESCRIPTION OF PRIOR ART

[0005] Bottles, cans, jars and similar containers are often packed together in groups of two, four, six, or eight containers at a time, held together by a top carrier, preferably made of cardboard, with ring structures that secure the neck or top edge of the containers.

[0006] There are carrier applicator systems on the market for this type of packaging operations, within which three main groups can be distinguished, differentiated mainly by the number of containers they process in a given time.

[0007] There are manual systems for applying carriers to a group of cans, normally operated by an operator through a manual press comprising an applicator plate, which when pressed against a carrier template placed on a set of cans, deforms said template so that the carrier's holes engage under the upper ring of the can. An example of this type of manual system is described in an alternative embodiment of application US2022411114A1 by Elliott et al. published on December 29, 2022. In this, it can be seen that the cans are manually placed and arranged between side walls to arrange them in a 2x6 matrix, and then a carrier template is also manually placed on the cans and an applicator associated with a manual press is lowered.

[0008] Of course, manual carrier application systems are designed for low production levels, allowing for processing a few cans per hour. Other obvious disadvantages include the slowness of the process, the dependence on human strength, and the imprecise positioning of the carrier on the cans, as there are no means of ensuring the carrier's positioning before applying pressure to the template.

[0009] At an opposite extreme to the system just mentioned, there are devices known as continuous carrier application systems, which are capable of processing a large number of cans per hour and at high speed, being able to process at least 100 thousand cans per hour, thanks to their automated components and normally provided with loop subsystems, carousel type, which allow processing of cans without stopping to generate the necessary steps, such as aligning the cans in two or more rows, transporting the cans, dosing the quantity of containers fed, providing a carrier in a template state on the upper face of the cans and applying said carrier so that it fits and hooks onto the top of the cans.

[0010] Examples of the above can be seen in the content of document EP3680183A1 by Barozzi, L. published on 15 / 07 / 2020, which shows two rows of cans being continuously fed through parallel channels; it comprises two opposing carousels, each with a plurality of grippers having three curved extrusions that hold three cans against the walls of the channels, to subsequently join together on a center line forming groups of six cans, held by respective opposing grippers; in a subsequent advance stage, the groups are moved by the same grippers to an area where a template feeder places a template on a group of six cans, which at a subsequent advance point passes under a series of presses with a lower applicator that deforms the template so that it hooks onto the cans.

[0011] The industry has varied considerably in terms of can sizes and the groupings that can be made with them, with packs of four, six, and even eight cans currently on the market. Meanwhile, packaging systems seek to generate multiple packs simultaneously that can later be separated, such as simultaneously generating three packs of four cans each or two packs of six cans each. On the other hand, the size of beverage cans widely used in the market can be classified into two large groups: standard cans and slim cans. The latter have the same top rim size as standard cans, but vary in body diameter.

[0012] To process different can sizes into packages, the systems or machinery used to form the can packs must allow for format changes in the system applicators and, ideally, these changes must be made as quickly and cost-effectively as possible. One of the problems with the EP3680183A1 solution is that it does not allow for easy format changes. Even if this were the case, the cost would be extremely high, as each of the grippers rotating in the carousel would have to be replaced, either by grippers with more or fewer curved cavities to form packs of more or fewer cans than the specified six; or by replacing them with grippers where the curved cavities and the distance between them respond to can sizes other than the standard ones.

[0013] Other examples of continuous systems that can be highlighted from the prior art are those taught in document EP3831728A1 by Boselli, M. published on 06 / 09 / 2021 and in WO2022271672A1 by Limousin, F. et al, published on 12 / 29 / 2022; they describe packaging systems for forming groups of cans gathered with an upper carrier, where these systems comprise individual grippers, one for each side of the can; these individual grippers are also mobilized in carousels so that grippers opposite each other hold and transport a single can. An automation of the system allows it to be configured so that at one point along the route the grippers are grouped laterally in a certain quantity, to form, for example, a pack of six cans.Each of these individual grippers must have its own means of ensuring the can does not come loose, so they include a suction cup programmed to suction the can wall while attached to it and release it when the carrier is already installed and the can pack must exit the system line.

[0014] The aforementioned systems, while they allow for continuous operation to process a large number of cans simultaneously, do not allow for easy, cost-effective format changeovers. They are expensive systems due to the number of parts required, the manufacturing of each part, the automation, and the various stations the cans must pass through. These high-cost systems are not suitable for intermediate production levels, where such a large number of containers per hour does not need to be processed.

[0015] Between manual systems and continuous systems like those mentioned above, there are intermediate systems, commonly known as intermittent systems. While they allow for the automated processing of a larger number of cans than a manual system, they are also designed for medium production levels. They are called intermittent because, compared to continuous systems, which, thanks to their loop or carousel stations, do not stop at any point in the process and can produce thousands of cans per hour, intermittent systems are rather linear, where the cans advance in rows that stop at least once to perform a specific action and then continue advancing to the next step.

[0016] An example of this can be seen in US 2015090404 Al by Van Wickeren et al., published on 04 / 02 / 2015, which shows lines of bottle packaging advancing linearly along a conveyor belt to a station where the assembly stops so that an applicator system can be lowered and arrange joining means between the groups of bottles.

[0017] Yet another example of an intermittent system that can be cited is the one described in US2022281628A1 by Serpa, F. published on 09 / 08 / 2022, where an automated system is seen that allows the linear advance of two continuous rows of cans, which at one point stop to be portioned into a group of six cans thanks to grippers that move orthogonal to the advance of the cans and confine them against a pair of partitions; then, said grouping is transferred laterally to another line parallel to the previous one; in that position, a robotic arm acts that moves between a warehouse where the carriers are stacked and the point where the group of cans is;said arm has a downwardly pointing applicator plate partially covered by grippers which open and close downwardly to grip a carrier from the magazine, the arm then in a closed state moves towards the grouping of cans to rest on them and generate pressure, so that the carrier is hooked on the cans; the grippers then reopen to allow the applicator arm to rise without passing over the carrier already placed on the cans;

[0018] As you can see, solutions like the one mentioned above are cumbersome and expensive to process so few cans at a time as they move along a single line. Moving groups of cans to a parallel line requires additional grouping elements, which are different from the grippers on the robotic arm, increasing steps, time, and costs.

[0019] This demonstrates the need for a system that can assemble multiple can packs faster than a manual system, yet is simple and cost-effective to implement. It is designed for medium-scale, intermittent production, and is applicable to both standard and slim cans without having to replace a large number of parts.

[0020] GENERAL DESCRIPTION OF THE INVENTION

[0021] The present invention relates to a system for forming multipacks of containers, such as beverage cans; it also relates to a method for forming multipacks of cans with said system; and it further relates to a multifunctional pivoting device that operates with said system.

[0022] One of the objectives of the present invention is to provide a system for applying multiple templates to a set of cans, which is capable of processing several groups of cans simultaneously, in a simple and economical manner by integrating multiple functions into a single component.

[0023] An additional objective of the present invention is to provide a system for assembling can packages, which is versatile, applicable to both thin and standard cans, of different heights, and where they can be grouped in different formats and quantities of cans.

[0024] Another objective of the present invention is to provide a method for forming multiple can packs, through the aforementioned system, which allows a single stop in the can feed line to form multiple can packs, and at the same time, ensures the position of a carrier template on the cans.

[0025] Yet another objective of the present invention is to provide a multifunctional pivoting device for operating with the present system, which is capable of performing multiple functions, simplifying the equipment and reducing costs.

[0026] To provide a clear context for the present invention, it is necessary to first understand the difference between standard cans and thin cans, as well as the difficulties arising from their size in order to group them. To this end, the necessary background will be set out below, supported by some figures that are part of this presentation, attached here for reference purposes only and which are indicated in the figure sheet as prior art. Taking FIG. 29 as a reference, in general, standard cans (B1) and thin cans (B2) FIG. 30, have the same diameter (d) of the upper ring (b) where the carrier templates (A) used to form can packs are hooked; the height varies between cans, but mainly the diameter (D) of the body varies.

[0027] One of the problems addressed by the present invention has to do with the adequate separation (Si) that must exist between the rings (b) of the grouped cans. In the case of thin cans (B2) such as cans known as “sleek” or “slim”, there is very little difference between the diameter (D) of the body and the diameter (d) of the ring, so when confining the cans next to each other, the distance (Si) between their rings is very small, leaving no space for the insertion of coupling rings (al) of a template. Compared to what happens with standard cans (B 1) (FIG. 29), since these have a greater difference between the diameter of the body (D) and the diameter (d) of the upper ring, when placing them glued together a greater separation (Si) is defined than what occurs in thin cans, which allows for wider coupling rings (al) (FIG. 32), which make a carrier more resistant.In the case of thin cans, this small distance would require the carrier design to have very thin coupling rings, which would make it very weak. The separation (S2) between different groups of cans is also relevant for receiving a multiple template (FIG. 31).

[0028] Special carrier templates have been developed for thin cans, as can be seen, for reference, in the carrier and its template contained in application WO2021179099A1 by the same inventor of the present invention, where the type of unitary templates and multiple templates with which the present system can operate are seen more specifically. Said multiple templates (A) being made up of more than one unitary template (Al), joined together by weakened folding lines (a2) that facilitate the separation between carriers when the different can packages are assembled (FIG. 32).

[0029] Said multiple templates (A) for thin cans (FIG.32) have a separation (t) between the openings (a3), which is greater than the actual distance (Si) between the upper rings of the thin cans, and also have a separation (w) between the openings (a3) ​​of a unitary template (Al) with respect to the adjacent template, which is greater than the distance (t) between the openings of a single unitary template (Al).

[0030] In order to apply these multiple templates (A) to several groups of thin cans (B2), said cans must be grouped and positioned in a spaced manner from each other before applying the carrier template to them, such that the distance (Si) between the upper rings of the same group of cans coincides with the separation (t) of the unitary templates and, at the same time, there must be a lateral distance (S2) between groups of cans, which coincides with the greatest distance (w) between unitary templates. One of the objectives of the present invention is for the system to be capable of grouping, positioning and separating the thin cans from each other and between groups of cans, in order to be able to receive a multiple template for thin cans.

[0031] Specifically, (FIG.32) the multiple templates (A) with which the present system operates, its method and the multifunctional pivoting device to operate with said system, are of the type in which their longitudinal edges (a4) have at least two centering notches (a5) equidistant from each other, based on which some components of the present system act to position the aforementioned template on the cans.

[0032] Although the present invention could, strictly speaking, operate with unitary templates (Al), the optimization of the system is achieved with the use of multiple templates (A) that allow several can packages to be formed simultaneously during the packaging process.

[0033] These multiple templates (A) can have different arrangements of openings (a3) ​​that allow to conceive different formats of can packs, such as, for example, a multiple template formed by three unitary templates (Al) with four openings (a3) ​​each, distributed in two rows of six openings, which allows to form simultaneously, three packs of four cans each (3 x4) (FIG.32); another existing and recurrently used multiple template arrangement, comprises two unitary templates (Al) with six openings (a3) ​​each, to form simultaneously, two packs of six cans each (2x6) (FIG.33).

[0034] In the present invention, the term "feed line" is used to refer to the longitudinal path taken by the two rows of cans, from the entrance to the system to the exit of the cans grouped into packages.

[0035] Thus, the present system for forming multiple can packs generally comprises an applicator station for positioning the cans moving in a feed line of two longitudinal rows of cans parallel to each other and applying a multiple template on an upper plane thereof; this applicator station operates in a coordinated manner with a metering mechanism located before the applicator station, which counts the cans and controls the continuity of the advance of the cans; said advance of the cans is facilitated by a conveyor mechanism for transferring two rows of cans in a feed line to and from said applicator station.

[0036] Said conveyor mechanism comprises three sections aligned along the system's feed line, the first of which is an input section located before the dosing mechanism, preferably formed by an endless belt that can be of the roller type; preferably, said section also comprises longitudinal railings on each side, which extend to the beginning of the application station to confine the cans to the center as they advance; optionally, it comprises a longitudinal central plate, which transversely separates the two rows of cans.The second section is a static section located after the dosing mechanism, specifically at the application station. It preferably consists of a flat, smooth support that allows the cans to be held securely and slide smoothly over it. It optionally comprises a longitudinal central plate that transversally separates the two rows of cans, where this central plate has a thickness that determines the necessary separation between the two rows of thin cans.

[0037] When the system is used to form standard-sized can packs, the aforementioned central plate is not required. Therefore, it can be connected to the static section of the conveyor mechanism via a removable coupling to extract the plate, or it can be coupled with a retractable mechanism that allows it to be raised or lowered within the system itself. The third section is an output section located after the application station and preferably consists of an endless belt or a roller support that facilitates the advancement of the already formed can packs.

[0038] The aforementioned dosing mechanism consists of a pair of toothed wheels with curved cavities around their perimeter, the cavities coinciding with part of the curved contour of the cylindrical mantle of the cans; both wheels are arranged horizontally, separated and placed opposite each other, adjacent to each side of the conveyor mechanism and located before the application station; so that when the two rows of cans pass between the wheels, said wheels, synchronized with each other, position the cans, one tangent to the other, and make them advance towards the application station; at the same time, sensors associated with the wheels allow the number of cans that have passed through to be counted, stopping when the pre-established quantity is met.

[0039] The application station consists of a template feeder that feeds the templates onto the cans; a press mechanism that deforms the template onto the cans to form the carrier and generate the can packs; and a positioning mechanism that determines the lateral position between cans and between groups of cans, and also ensures the template is positioned on the cans.

[0040] The template feeder comprises a horizontal retractable tray, which moves orthogonal to the direction of advance of the cans, between a retraction position, to take a template that is dispensed from a template magazine by means of an arrangement of pivoting suction cups, which place the template on the upper face of the retractable tray; and a supply position, to arrange the template on the upper face of a group of cans; this feeder is aligned with the can positioning mechanism, but arranged in an area lateral to the advance line of the cans, such that when the retractable tray adopts its supply position, said tray is positioned across the advance line of the cans and at the same time, above the positioning mechanism.The aforementioned tray preferably comprises a flat plate-shaped body with a straight projection located on the rear edge of the plate's upper face, oriented parallel to the can feed line. The purpose of said straight rear projection is to push the template perpendicular to the feed line so that it rests on the upper face of the group of cans already confined by the positioning mechanism.

[0041] The purpose of the press mechanism is to deform the template over the cans to give it the shape of a carrier and form the multiple can packs. It is located at the same point as the positioning mechanism, but at a higher height. It comprises a horizontal press plate driven by actuators, which moves vertically between a lower position, engaging the top face of the group of cans, and an upper position that releases the already configured can pack to advance freely. It also includes a set of support pillars that guide the vertical movement of the press plate.

[0042] This press mechanism also comprises an applicator plate located on the underside of the press plate, the purpose of which is to deform the template on the upper side of the group of cans, such that the coupling openings of the carrier engage the respective cans, forming a carrier that generates packs. This applicator plate comprises grooves shaped to fit the top of each can, and can be arranged according to the format of the can pack to be formed.

[0043] Both the press plate and the applicator plate comprise opposite longitudinal edges provided with at least two open-end notches to allow the passage of centering pins, which will be explained later.

[0044] It follows that these three components of the application station are located at the same point on the feed line, allowing their functions to be carried out in a single stoppage of the feed of the cans, thus avoiding second or third stops or deviations from the feed line, as well as allowing a saving in the total space occupied by the system.

[0045] The aforementioned positioning mechanism, which forms part of the application station, is comprised of at least two identical multifunctional pivoting devices; longitudinally spaced vertical supports for holding said multifunctional pivoting devices; it also comprises actuators for generating the pivoting motion of the multifunctional pivoting devices; and connecting rods that connect and synchronize the simultaneous pivoting motion between two multifunctional pivoting devices on the same side of the feed line.

[0046] The at least two multifunctional pivoting devices of the system comprise a longitudinal axis eccentric with respect to the cross-section of the pivoting device itself, which is oriented parallel to the can feed line and extends between smaller end faces of each of the devices; the devices comprise an upper face with at least two perpendicular pins that act as stops and retainers of the template in a template feeding stage; an inner face with a series of concave curved recesses interspersed with separating portions of variable width; and a lower face comprising a longitudinal projection with a rounded edge that acts to guide the longitudinal feed of the cans.

[0047] Said at least two multifunctional pivoting devices pivot on the basis of their eccentric longitudinal axis, between a position for holding and laterally positioning the cans, where the device is arranged horizontally; and a position for guided release of the cans, where the device is preferably oriented inclined; the position for holding and laterally positioning allows the concave curved recesses and the separating portions to be positioned laterally between the cans, and at the same time, allows the pins to act by centering and retaining the template on a plane above the set of positioned cans;Meanwhile, the release and guide position allows both the longitudinal recess of the lower face to remain tangential to the cans and provide them with longitudinal guidance during their advance, and also allows the curved concave recesses to be decoupled from the cans once the packages have been formed and release them so that they advance towards the exit section of the conveyor mechanism.

[0048] In said release and guide position, the device is oriented at an angle, this being the minimum position necessary to clear the passage of the cans without the separating portions interfering with the advancement of the cans, but keeping the longitudinal projection of its lower face tangent to the cans to provide guidance as they advance; however, said release and guide position can also be achieved with a completely vertical orientation of the device, as long as the longitudinal projection remains tangent to the cans to provide guidance as they advance.

[0049] These at least two pivoting devices are arranged opposite each other, located along each of the two rows of cans, such that, according to their position, an inner pivoting device is distinguished, located on the side adjacent to the template feeder; and an outer pivoting device is located on the side opposite to that where the template feeder is arranged. In a preferred embodiment of the system, the positioning mechanism comprises two pivoting devices on each side of the can feed line, that is, an upper pivoting device and a lower pivoting device on each side, vertically spaced and parallel to each other to stably hold the cans both at the top and bottom. This reduces the risk of the cans wobbling and is especially suitable when the system operates for tall, thin cans, whether of the standard, "sleek" or "slim" type.

[0050] In this embodiment of the system, the upper pivoting device and the lower pivoting device on one side of the feed line pivot together relative to each other by means of a connecting rod that transmits the force generated by the actuator arranged to produce the pivoting movement of said pivoting devices. In another embodiment of the invention, the positioning mechanism comprises a single pivoting device on each side of the feed line of the cans, specifically located midway along the height of the cans; this is suitable when the system operates with short, sturdy cans, which are inherently more stable and have less risk of rocking during their feed.

[0051] In relation to the press mechanism, both the press plate and the applicator plate located on the lower face of the press plate comprise at least two notches on their longitudinal edges; said notches are open-ended and are located in a position vertically aligned with the centering pins of the pivoting devices, which allows that when the press plate descends to apply the template on the cans, the pins can vertically pass through said assembly of applicator plate and press plate, allowing the free descent of the latter without hitting the pins.

[0052] Now, the fact that the notches are open-ended punches and not merely perforations, allows that when the press plate finishes its pressing stage and begins to ascend, the pivoting devices can immediately begin to pivot from their horizontal position to their inclined position, without the pins getting caught inside the notches, which translates into a saving of time in the execution of the procedure, since it is necessary to wait for each component to finish moving before starting the next stage.

[0053] The present invention also relates to the multifunctional pivoting device, which can be implemented according to a first type of pivoting device, intended for use in the system just described, for assembling multiple packs of thin cans, of the "sleek" or "slim" type; and a second type of pivoting device, intended for use in the system just described for assembling multiple packs of standard-sized cans.

[0054] This multifunctional pivoting device is capable of guiding the longitudinal advance of cans; capable of providing lateral positioning between cans; capable of providing alignment between the template, the cans, and the press mechanism; and capable of generating template retention during an application procedure.

[0055] Each of the pivoting devices is preferably formed by a straight, elongated body, defined by a longitudinal upper face carrying at least two pins; a longitudinal lower face provided with a longitudinal projection; a longitudinal inner face provided with concave curved recesses; a longitudinal outer face, opposite the inner face; and two end faces opposite each other, transverse to the longitudinal faces, from which an eccentric longitudinal pivot axis projects.

[0056] The eccentric pivot longitudinal axis is oriented parallel to the feed line of the cans, and based on this, each device pivots between a horizontal position, where the upper and lower faces are oriented perpendicular to the cylindrical mantle of the cans to allow the concave curved recesses of the inner face to surround a part of said cylindrical mantle of the cans; and pivots towards a preferably inclined position to allow the longitudinal projection present on the lower face of the pivoting device to be arranged tangent to said cylindrical mantle of the cans.

[0057] The purpose of the curved concave recesses is to partially surround the cylindrical mantle of each can to hold them in place while the template is applied; between said curved concave recesses, the device comprises separating portions whose purpose is to define the lateral positioning between the cans.

[0058] Furthermore, said pivoting device also comprises an arrangement of at least two pins, intended to generate alignment between the template, the cans and the press mechanism, and to retain the template on the cans during the template feeding stage.

[0059] The concave curved recesses of the longitudinal inner face of the pivoting devices are formed by a curved wall extended perpendicular to the longitudinal upper face of the elongated body, which is defined by a curved bottom area and lateral end areas that adjoin respective separating portions.

[0060] The number of concave curved recesses per pivoting device can vary depending on the number of cans per pack and the number of packs to be formed simultaneously using a multiple template. Can packs are typically marketed in 4- and 6-can formats, although, to a lesser extent, special formats with fewer than 4 and more than 6 cans are also available. Similarly, the width of each concave curved recess can vary depending on the diameter of the can body.

[0061] The aforementioned separating portions located between the concave curved recesses comprise a front edge whose width defines the lateral separation between adjacent cans of the same row of cans; from said front edge, each separating portion has a convex curved lower development that allows a smooth and progressive friction of the concave recess in relation to the curved mantle of the can; at the same time, this width of the front edge of the separating portions progressively increases until it merges with the bottom area of ​​the adjacent curved recesses.

[0062] In one embodiment of the pivoting device, intended for use in systems for forming multiple packs of standard-sized cans, the width of these front edges of the separating portions all have the same width, preferably pointed, the effect of which is that the standard cans acquire the same lateral positioning between them, without separation distance, to keep the cans together.

[0063] In another preferred embodiment of the pivoting device, intended for use in systems for forming multiple packages of thin-sized cans, the front edges of the separating portions have different widths from each other, where preferably every two or three concave curved recesses the width of this edge is greater than the width of the other edges, generating the effect that the cans of the same row are grouped together in twos or threes, and these groups, at the same time, are separated from each other by distances greater than the distances between cans of the same group.

[0064] Regarding the longitudinal projection arranged on the underside of the pivoting device, it comprises a rounded longitudinal edge that borders the bottom area of ​​the concave curved recesses. This longitudinal projection determines that the cross-section of each pivoting device has a lower portion that is wider than the width of the upper portion of the cross-section.

[0065] As mentioned above, each device pivots on the basis of its eccentric longitudinal axis, thus allowing for multifunctionality, since during a stage of advancement of the two rows of cans, said devices are arranged in an inclined or vertical position, to clear the passage of the cans, but at the same time, providing them with a longitudinal guide thanks to the longitudinal straight projection located on the lower face of each pivoting positioning device, where it allows the two rows of cans to be confined to a medial area of ​​the advancement line.Meanwhile, this same pivoting device, thanks to its change of orientation due to the pivot movement, rotates to a horizontal position, causing the rounded edge of the longitudinal projection to remain tangent and in smooth contact with the mantle of each can, until each of the concave curved recesses begins to make progressive contact with said mantle of the can until partially surrounding it once the pivoting device reaches its horizontal state; simultaneously, the separating portions, as they enter between two adjacent cans, cause an adjustment in the lateral position between said cans.

[0066] A relevant feature that allows a progressive and smooth adaptation of the pivoting device around the mantle of the cans, is the rounded shape of the longitudinal edge of said longitudinal projection, also thanks to a curved profiling of the edges that join the curved wall of each concave curved recess with each separating portion; as well as the fact that the bottom area of ​​the curved wall of each recess is located or originates flush with the rounded edge of the longitudinal projection with rounded edge, thus avoiding sudden staggers that can push the cans and position them improperly when the device pivots.

[0067] Furthermore, the eccentric longitudinal axis of the pivoting device is located eccentrically with respect to the width of the cross-section, said width extending between the lower face and the upper face of said device, where said longitudinal axis is located offset towards the lower face of the device; meanwhile, in relation to the height of the section, which extends the outer and inner faces of the device, said longitudinal axis is centered.

[0068] On the other hand, said eccentric axis is located adjacent to the rounded edge of the longitudinal projection of the pivoting device, however the distance from the axis to the lower face is greater than the distance from the same axis to the end point of the rounded edge, where the concave curved recesses begin; this eccentric condition then generates that the portion that surrounds the axis has a thickness that progressively decreases towards said end point of the rounded edge, which allows that as the device pivots, from its inclined position to its horizontal position, there is practically no significant friction with the mantle of the can, until the concave curved recesses surround the mantle and the separating portions are positioned between the cans.

[0069] Regarding the centering function of the pivoting devices, these comprise on their upper longitudinal face an arrangement of at least two pins, each formed by a straight body, preferably cylindrical, attached perpendicular to said upper longitudinal face.

[0070] These pins are located at strategic points on the longitudinal upper face of the pivoting devices; specifically, they are located at points that coincide with the centering notches present on the longitudinal edges of the templates, so that when the pivoting devices are rotated horizontally, said pins are oriented vertically and thus, when the template is arranged on the cans, the pins fit into the template's notches and can serve as a stop to prevent the template from moving in any direction and center it with respect to the group of cans.

[0071] In one embodiment of the pivoting device, it may comprise more than two pins spaced laterally apart and aligned longitudinally with each other, each of them coinciding with a respective notch in the outer edge of the template, and this embodiment is especially intended to be located as an outer pivoting device; while an inner pivoting device comprises only two pins, aligned longitudinally with each other and spaced laterally by a distance that is greater than the width of the retractable tray of the template feeder, but which at the same time coincide with two notches in the inner edge of the same template.

[0072] The latter allows the orthogonal movement to the line of advance of the retractable tray to not be interfered with by the presence of pins centered on said inner pivoting device; thus, the inner pivoting device can rotate from its inclined position to its horizontal position when the retractable tray is still on the upper face of the cans depositing the template. In turn, this spaced arrangement of the pins of the inner pivoting device allows the latter to rotate and arrange the pins in a vertical position before the retractable tray is withdrawn, such that said pins of the inner pivoting device act to retain the template on the cans so that the retraction movement of the tray does not carry the template with it or decenter it from the appropriate position already acquired.

[0073] In the case of the pins of the outer pivoting device, these act during the feeding process carried out by the retractable tray, which moves orthogonally to the can feed line. These pins of the outer pivoting device stop the orthogonal inertial movement of the fed templates, acting as stops that touch the notches on the outer edge of the template, also causing the template to be centered with respect to the grouped cans. The pins are located on the longitudinal upper face of the device, preferably at points aligned transversely with the separating portions of the pivoting devices.

[0074] Thus, the multifunctional pivoting devices that form part of the application station are capable of guiding the longitudinal advance of the cans and keeping them confined to the center of the advance line thanks to their longitudinal projection; they are also capable of laterally positioning the cans relative to each other thanks to the concave curved recesses and the separating portions; they are capable of accurately centering the templates on the grouped cans, thanks to their pins; and at the same time, also thanks to the pins and the operating method, they are capable of retaining the template on the cans when the retractable tray is being withdrawn.

[0075] The present invention also relates to the method for forming multiple packs of cans through the system for forming multiple packs, where this method allows an optimization of the operating time, ensures proper positioning between the cans and a multiple template, and allows for the provision of clearance spaces between each batch of processed cans.

[0076] A first embodiment of the method allows for the formation of more than one can pack simultaneously, where the cans are of a thin format, such as "sleek" or "slim" cans, and they need to be positioned separately from each other before applying a carrier. This method is performed using the aforementioned system described above. This method optimizes operating time, ensures proper positioning of the cans and a multiple template, and allows for clearance spaces between each batch of processed cans.

[0077] Said method for forming multi-packs of thin cans comprises the steps of: a) providing two longitudinal rows of cans in a feed line of a system for forming multi-packs of cans, comprising a conveyor mechanism, a metering mechanism and an applicator station comprising at least two pivoting devices opposite each other; b) arranging the two rows of cans one on each side of a longitudinal separator plate located in a first and second section of the conveyor mechanism; c) advancing the two rows of cans until they pass through the metering mechanism comprising two rotatable metering wheels spaced apart from each other; d) simultaneously with step c), pivoting the pivoting devices in an inclined position until a rounded edge of a longitudinal projection present on a lower face of the pivoting devices tangentially touches the mantle of the cans;e) quantifying the number of cans passing through the dosing mechanism until a first batch of cans is centered in front of the two pivoting devices of the applicator station that are in an inclined position; f) interrupting the rotation of the dosing wheels; g) rotating the dosing wheels in the opposite direction to the forward direction, for a distance sufficient to generate a clearance space between the end of the batch of cans to be processed and a second batch of cans on the way; h) simultaneously with step g) placing a multiple template for thin cans on a retractable tray of the feeder mechanism; i) pivoting the at least one external pivoting device to a horizontal position; so that its separating portions are arranged between the cans of the outer row and laterally separate the cans from each other according to the different widths of said separating portions;and so that pins arranged on the longitudinal upper face of the outer pivoting device are arranged vertically, perpendicular to the upper plane of the cans; j) moving the retractable tray to a provision position towards the advance line, until it is positioned, together with the template it carries, on the upper plane of the cans, advancing until the centering notches on the outer edge of the template abut the pins of the outer pivoting device; k) pivoting the at least one inner pivoting device towards a horizontal position so that its separating portions are arranged between the cans of the outer row and laterally separate the cans from each other according to the widths of said separating portions;and at the same time so that pins arranged on the upper longitudinal face of the inner pivoting device are arranged vertically, perpendicular to the upper plane of the cans and abut the centering notches on the inner edge of the template; l) move the retractable tray to a retracted position, to leave the template deposited on the upper plane of the cans, retained by the pins of the inner pivoting device; m) lower the press plate onto the batch of cans already positioned with their upper template, so that the template is deformed in a controlled manner and the template's coupling openings are coupled around the upper ring of each can and so that the weakened fold lines joining the templates are broken; n) raise the press plate to its initial upper position;o) simultaneously with step n), pivoting both pivoting devices opposite each other simultaneously from their horizontal position to their inclined position to release the advance of the already formed can packs. Steps that can occur simultaneously, such as step c) with d); g) with h), and step n) with o), make it possible to shorten the final process times, without having to wait for these steps to be carried out successively.

[0078] In stage b) the two rows of cans arranged one on each side of the longitudinal separator plate are additionally channeled by the longitudinal rails that are arranged on each side of the initial section of the conveyor mechanism.

[0079] Stage e), which consists of quantifying the number of cans that pass through the dosing mechanism until a first batch of cans is centered in front of the two pivoting devices of the application station, allows more cans to pass than the number of cans in the first batch, with the aim that said extra cans cause the previous cans to be pushed so that they move smoothly along the advance line.

[0080] Stage f) which consists of interrupting the rotation of the dosing wheels, thereby stopping the advance of the cans; meanwhile, stage g) which consists of rotating the dosing wheels in the opposite direction to the advance for a certain section, generates a clearance space between the fed cans and said wheels, which allows that at the time in which stages i) and k) are executed, which consist of pivoting the pivoting devices to their horizontal position, this causes their separating portions to cause a lateral displacement between thin-format cans, specifically, to separate or distance said cans according to what is necessary in order to be able to apply a carrier template for thin cans to them; on the other hand, said separating portions also generate the necessary distance between groups of cans, which is greater than the distance between cans of the same group;These lateral spacings can be achieved because the aforementioned clearance allows room for the cans to move laterally. If this clearance were not generated, the cans would be pressed together from the application station to the dosing wheels, and when the devices pivot to their horizontal position, their separating portions would not be able to fit between the cans to position them at the necessary distance.

[0081] In step h), which consists of placing a multiple template on a retractable tray of the feeder mechanism; said placement of the multiple template includes the pivoting movement of an arrangement of arms with suction cups that ascend to take a template from the template magazine, and with a downward movement, deposit it on the upper face of the retractable tray. In step j), which consists of moving the retractable tray to a provision position towards the feed line to position itself, together with the template it carries, on the upper plane of the cans, a thrust of the template is generated orthogonal to the feed line, which is executed by a rear projection that the tray has; such that when the tray advances forward, the projection ensures that the template moves with the tray.The fact that steps i), j), k) and 1) are executed consecutively and not simultaneously, implies that the pivoting devices on one side and the other do not pivot at the same time but rather the inner pivoting device pivots only after the retractable tray has deposited the template on the upper plane of the cans; this ensures that when the inner device pivots, its pins effectively center and position the template, supporting it against the pins of the outer device, which are already in a vertical position. At the same time, the fact that the tray retracts only after the inner pivoting device has been oriented horizontally, and therefore its pins are already holding the template by its rear edge, allows the retractable tray not to drag the template with it and return it, but rather the pins of the inner device generate a retention of the template, ensuring its positioning on the cans.

[0082] The simultaneity of steps o) and n) is allowed by the open-end notches that both the press plate and the applicator plate attached to the press plate have, since these, when open, allow the pins to move from the vertical position outwards without colliding with the press plate.

[0083] In another embodiment of the method of the present invention, said method operates with the same system described, but is directed toward the application of carriers for standard-sized cans. As noted in a previous section, with this type of can, it is not necessary to create a separation between cans to accommodate a template, so for this application, it is possible to use the second type of pivoting device, where the separating portions are pointed and all equal to each other.

[0084] Said method for forming multiple packs of standard format cans through the system for forming multiple packs, allows an optimization of the operating time, ensures the adequate positioning between the cans and of a multiple template for standard cans; the method comprises the steps of: a) providing two longitudinal rows of standard size cans in a forward line of a system for forming multiple packs of cans, comprising a conveyor mechanism, a metering mechanism and an applicator station comprising at least two pivoting devices configured to operate with standard cans; b) advancing the two rows of cans until they pass through the metering mechanism comprising two rotatable metering wheels spaced apart from each other;c) simultaneously with step b), pivoting the pivoting devices into an inclined position until a rounded edge of a longitudinal projection present on a lower face of the pivoting devices tangentially touches the mantle of the cans; d) quantifying the quantity of cans passing through the dosing mechanism until a first batch of cans is centered in front of the two pivoting devices of the applicator station that are in an inclined position; e) simultaneously with step d) arranging a multiple template for standard cans on a retractable tray of the feeder mechanism; f) pivoting the at least one outer pivoting device into a horizontal position; so that its separating portions are arranged between the cans of the outer row and position the cans laterally with respect to each other;and so that centering pins arranged on the longitudinal upper face of the outer pivoting device are arranged vertically, perpendicular to the upper plane of the cans; g) moving the retractable tray to a provision position towards the advance line, until it is positioned, together with the template it carries, on the upper plane of the cans, advancing until the centering notches on the outer edge of the template abut the pins of the outer pivoting device; h) pivoting the at least one inner pivoting device to a horizontal position so that its separating portions are arranged between the cans of the outer row and position the cans laterally with respect to each other;and at the same time so that centering pins arranged on the longitudinal upper face of the inner pivoting device are arranged vertically, perpendicular to the upper plane of the cans and abut against the centering notches on the inner edge of the template; i) move the retractable tray to a retracted position, to leave the template deposited on the upper plane of the cans, retained by the pins of the inner pivoting device; j) lower the press plate onto the batch of cans already positioned with their upper template, so that the template is deformed in a controlled manner and the template's coupling openings are coupled around the upper ring of each can and so that the weakened fold lines joining the templates are broken; k) raise the press plate to its initial upper position;l) simultaneously with step k), pivot both pivoting devices opposite each other, simultaneously, from their horizontal position to their inclined position to release the advancement of the already formed standard can packs;

[0085] BRIEF DESCRIPTION OF THE FIGURES

[0086] A detailed description of the invention will be carried out in conjunction with the figures that form an integral part of this presentation, where:

[0087] Figure 1 shows a schematic plan view of the system for forming multiple can packs.

[0088] Figure 2 shows an isometric view of the system's application station. Figure 3 shows a schematic profile view of the system for forming multiple can packs.

[0089] Figure 4 shows a bottom isometric of the press plate and applicator plate assembly.

[0090] Figure 5 shows a bottom plan view of the press plate and applicator plate assembly.

[0091] Figure 6 shows a partial isometric view of the positioning mechanism that forms part of the application station.

[0092] Figure 7 shows a schematic profile view of the positioning mechanism.

[0093] Figure 8 shows a schematic plan view of the positioning mechanism and the feed mechanism.

[0094] Figure 9 shows a schematic profile view of the positioning mechanism and the feed mechanism.

[0095] Figure 10 shows a front isometric view of an embodiment of a multifunctional pivoting device.

[0096] Figure 11 shows a bottom isometric view of one embodiment of a multifunctional pivoting device.

[0097] Figure 12 shows an isometric detail view of a multifunctional pivoting device.

[0098] Figure 13 shows a front isometric view of a second embodiment of a multifunctional pivoting device.

[0099] Figure 14 shows a sectional profile view of a multifunctional pivoting device.

[0100] Figure 15 shows a partial isometric view of the application station.

[0101] Figure 16 shows a schematic plan view of two multifunctional pivoting devices, together with a multiple template represented in a segmented line.

[0102] Figure 17 shows a schematic elevation view showing the coupling of the press plate and the pins.

[0103] Figure 18 shows a partial isometric view of the application station.

[0104] Figure 19 shows a schematic profile view of the positioning mechanism.

[0105] Figure 20 shows a schematic elevation view of the dosing and recoil stage of the dosing wheel.

[0106] Figure 21 shows a schematic profile view of the feeding stage of a template onto the retractable tray.

[0107] Figure 22 shows a schematic profile view of the pivot stage of the outer pivot devices.

[0108] Figure 23 shows a schematic elevation view of the pivot stage of the outer devices. Figure 24 shows a schematic profile view of the stage for fully positioning the template onto the cans via the retractable tray.

[0109] Figure 25 shows a schematic profile view of the pivot stage of the inner pivot devices.

[0110] Figure 26 shows a schematic profile view of the retraction stage of the retractable tray. Figure 27 shows a schematic profile view of the lowering stage of the press mechanism.

[0111] Figure 28 shows a schematic profile view of the simultaneous pivoting stage of the pivoting devices into an inclined position to release the formed can packs.

[0112] Figure 29 shows prior art background related to standard cans.

[0113] Figure 30 shows prior art background related to thin cans.

[0114] Figure 31 shows prior art information relating to distances between thin cans. Figure 32 shows prior art information relating to a type of multiple template applicable with the present invention.

[0115] Figure 33 shows prior art background related to a second type of multiple template applicable with the present invention.

[0116] It should be understood that the accompanying drawings are not necessarily to scale, but rather present a simplified representation of various features illustrating the basic principles of the invention. Specific design features, including, for example, the specific dimensions, orientations, locations, and shapes of the various illustrated components, will be determined in part by the particular intended application and environment of use.

[0117] DETAILED DESCRIPTION OF THE INVENTION

[0118] The invention will now be described in greater detail with reference to the accompanying figures, which illustrate various embodiments. These embodiments are provided by way of explanation of the invention; however, its implementation is not limited to these embodiments.

[0119] Those of ordinary skill in the art will appreciate upon reading this specification and viewing these drawings that various modifications and variations may be made thereto while maintaining the same inventive concept.

[0120] In a preferred embodiment of the invention, as shown in FIG. 1, the system (1) for forming multiple packs (P) of cans (B) comprises an applicator station (10) intended to position the cans (B) and to apply a multiple template (A) thereon; the cans (B) move in a feed line two longitudinal rows, an inner row (fi) and an outer row (í'a). It further comprises a conveyor mechanism (20) for moving the two rows of cans; and comprises a dosing mechanism (30) located before the applicator station (10), which counts and aligns the two rows of cans parallel to each other so that they advance towards the applicator station (10).

[0121] Said conveyor mechanism (20) comprises three sections aligned along the feed line of the system, of which the first section (21) is an input section located before the dosing mechanism (30), preferably formed by an endless belt; said section also comprises longitudinal rails (22) on each side of the feed line, which extend to the beginning of the application station (10) and then from the same station; a second section (23) is a static section located after the dosing mechanism (30), precisely in the application station (10). Both sections can comprise a longitudinal central plate (25), which transversally separates the two rows of cans. A third section (24) is an output section located after the application station (10), which is preferably formed by an endless belt or a roller support that facilitates the advance of the packages (P) of cans already formed.The aforementioned dosing mechanism (30) consists of a pair of wheels (31) with curved cavities (32). Both wheels (31) are arranged horizontally, separated and placed opposite each other, adjacent to each side of the first section (21) of the conveyor mechanism (20) and located before the application station (10). The application station (10) generally comprises a feeder mechanism (12) that provides the templates (A) on the cans, a press mechanism (13) that deforms the template (A) on the cans (B) to shape the carrier and generate the packages, and comprises a positioning mechanism (11) of the cans.

[0122] According to FIG. 2, together with FIG. 3, the application station (10) is made up of a feeding mechanism (12) of templates (A) to provide them on the cans (B); a press mechanism (13) that deforms the template (A) on the cans (B) to shape the carrier and generate the can packages; and a positioning mechanism (11) comprising at least two multifunctional pivoting devices (110), which, in one aspect, determine the lateral position between cans and between groups of cans, and in other aspects, ensure the positioning of the template (A) on the cans and allow the ascent of the press mechanism (13) simultaneously with the release of the already formed can package, without having to wait for this positioning mechanism (11) to be completely restored to a certain position to let the press mechanism (13) rise, allowing the total operating times to be shortened.The template (A) feeder mechanism (12) comprises a horizontal retractable tray (121) that moves orthogonal to the direction of advance of the cans, between a retraction position, to take a multiple template (A) dispensed from a template magazine (122) by means of an arrangement of pivoting suction cups (123), which place the template (A) on the retractable tray (121). The aforementioned retractable tray (121) comprises a plate-shaped body, with an upper flat face (124) and a rear straight shoulder (125) oriented parallel to the can advance line. For the purposes of greater clarity, the conveyor mechanism (20) and the dosing mechanism (30) have been omitted in Figure 2.

[0123] In another aspect of the invention, the press mechanism (13) comprises a horizontal press plate (131), under which is arranged an applicator plate (132) and comprises a set of support pillars (133) that guide the vertical movement of the press plate (131) so that it moves downwards until it rests on the cans (B) and deforms in a controlled manner the template (A) that is on the cans; as well as, so that it moves upwards once the can packs have been formed.

[0124] Referring to FIG. 4 in conjunction with FIG. 5, the horizontal press plate (131) comprises mutually opposite longitudinal edges (134) comprising at least two open-end notches (135); the template applicator plate (132) comprises grooves (138) shaped to engage the top of the can assembly; it comprises mutually opposite longitudinal edges (136) having at least two open-end notches (137). The open-end notches (135) of the press plate (131) and the open-end notches (137) of the applicator plate (132) are vertically aligned with each other. Said at least two open-end notches (135,137) of each of the longitudinal edges (134, 136), both of the press plate (131) and of the applicator plate (132), are spaced apart from each other by a distance equal to the lateral distance between pins (not illustrated) of the same pivoting device.

[0125] As seen in FIG. 6, the can positioning mechanism (11) comprises at least two multifunctional pivoting devices (110), opposite each other, arranged one on each side of the rows (fl, f2) of cans, which comprise a series of concave curved recesses (111) interspersed with separating portions (112) of variable width, arranged on a longitudinal inner face (113) of the device; and comprise at least two pins (114) arranged perpendicularly on a longitudinal upper face (115) of each pivoting device, which are arranged spaced apart from each other.

[0126] Now, as can be best seen in FIG. 7, said at least two multifunctional pivoting devices (110) further comprise a longitudinal projection (116) with a rounded edge (117) arranged on a longitudinal lower face (118); they further comprise an eccentric longitudinal axis (160) oriented parallel to the line of advance of the cans, so that said multifunctional pivoting devices (110) pivot between a horizontal position of holding and lateral positioning between the cans, and an inclined position of guided release of the cans.

[0127] According to FIG. 8, said at least two multifunctional pivoting devices (110) opposite each other correspond to an inner pivoting device (110a) located on a side adjacent to the template feeder (12); and an outer pivoting device (110b) located on the side opposite to that where the template feeder (12) is arranged; meanwhile, the pins (114) of the inner pivoting device (110a) are separated from each other by a distance that is greater than the width of the retractable tray (121) of the feeder mechanism (12), to allow the tray to move orthogonally to the feed line passing between the pins.

[0128] In an embodiment of the system, as shown in FIG. 9, the can positioning mechanism comprises two pivoting devices (110) on each side of the can feed line, arranged parallel to each other; two of which correspond to upper pivoting devices (HOs) and two correspond to lower pivoting devices (HOi). Wherein said two upper pivoting devices (HOs) each comprise at least two pins (114) arranged perpendicularly on their longitudinal upper face (115). Said upper pivoting devices (HOs) and lower pivoting device (1 lOi) pivot jointly with each other thanks to a connecting rod (140) that transmits force generated by an actuator (150) arranged to produce the pivoting movement of said pivoting devices.

[0129] FIG. 10 specifically refers to a multifunctional pivoting device (110) for positioning a group of cans fed into a system for forming multiple can packs; as previously indicated, it comprises a straight elongated body defined by a longitudinal upper face (115) carrying at least two pins (114) spaced laterally apart; a longitudinal inner face (113) provided with concave curved recesses (111) interspersed with spacer portions (112); a longitudinal outer face (119) opposite the inner face (113). As best seen in FIG. 11, it also comprises two end faces (120) opposite each other, transverse to the longitudinal faces, from which an eccentric longitudinal pivot axis (160) projects; while its longitudinal lower face (118) has a longitudinal projection (116) with a rounded longitudinal edge (117).

[0130] Taking into consideration FIG.12, the curved concave recesses (111) comprise a curved wall (lili) extended perpendicular to the longitudinal upper face (115), which is defined by a curved bottom area (1112) and lateral end areas (1113) that border on respective separating portions (112).

[0131] The separating portions (112) comprise a front edge (1121), from said front edge each separating portion (112) has a convex curved lower development (1122); the width of the front edge (1121) grows progressively until it merges with the curved bottom area (1112) of the adjacent concave curved recesses (111).

[0132] In a preferred embodiment of the multifunctional pivoting device, as shown in FIG. 12, the width of said front edge (1121) is different in some separating portions (112), defining wide separating portions (1123) and pointed separating portions (1124). In another embodiment of the multifunctional pivoting device, as shown in FIG. 13, the width of the front edge (1121) of the separating portions (112), is the same in all the separating portions of the pivoting device.

[0133] A preferred embodiment, as shown in FIG. 10, the pivoting device comprises six concave curved recesses (111), where in each two of them the separating portion (112) is a wide separating portion (1123) and the separating portion between said two concave curved recesses is a pointed separating portion (1124). This embodiment of the pivoting device is preferably applicable to form three packs of four thin cans each, which need a separation between them and between the groups of cans.

[0134] In another embodiment as shown in FIG. 13, the pivoting device comprises six concave curved recesses (111) interspersed with five equal separating portions (112), preferably pointed (1124). This embodiment of the pivoting device is preferably used to form two packs of six standard cans each, which do not require separation between them or between groups of cans.

[0135] On the other hand, according to what is illustrated in FIG.14, the eccentric longitudinal axis (160) of each pivoting device (110) is located eccentric with respect to the width (h) of the cross section of the pivoting device (110), said width (M) being extended between the lower face (118) and the upper face (115) of said device, where said eccentric longitudinal axis (160) is located displaced towards the lower face (118); meanwhile, in relation to the height (N) of the same section, which is extended between the outer face (119) and the inner face (113) of the device, said longitudinal axis (160) is centered.

[0136] In another aspect, said eccentric axis (160) is located adjacent to the rounded edge (117) of the longitudinal projection (116) of the pivoting device (110), but the distance (m) from the axis towards the lower face (118), is greater than the distance (n) from the same axis (160) towards the end point of the rounded edge (117), where the concave curved recesses (111) already begin; This eccentric condition then generates that the portion that surrounds the axis (160) has a thickness that progressively decreases towards said end point of the rounded edge (117), which allows that, as the device (110) pivots, from its inclined position towards its horizontal position, there is practically no significant friction with the mantle of the can, until the concave curved recesses (111) surround the mantle of the cans and the separating portions are positioned between the cans.

[0137] In another aspect of the invention, as shown in FIG. 15, said at least two pins (114) that are located on the upper face (115) of the pivoting devices (110), are laterally spaced apart from each other by a distance equivalent to the distance between two centering notches (a5) of the outer edges (a4) of a multiple template (A), which allows that when the multiple template (A) is delivered onto the cans (B) by means of the retractable tray (121), the aforementioned notches (a5) of the template (A) abut against said pins (114) of the outer pivoting device (110b), stopping its possible orthogonal movement, in addition to causing the template to be centered on the cans.

[0138] On the other hand, as can be seen in FIG. 16, when the inner pivoting device (110a) pivots to its horizontal position, and therefore its pins (114) adopt a vertical orientation, the latter abut against the notches (a5) of the inner edge (a4) of the template (A) that is already placed on the cans. The latter allows that when the retractable tray (121) retracts in the opposite direction to that of provision, the pins (114) of said inner pivoting device (110a) retain the template on the cans, without the retractable tray (121) dragging it or taking it with it.

[0139] In another aspect of the invention, as illustrated in FIG. 17, the distance between said at least two pins (114) of the same pivoting device (110) is equivalent to the distance between the at least two open-ended notches (135 / 137) of the assembly formed by the press plate (131) and the applicator plate (135) of the press mechanism (13). These open-ended notches (135 / 137), when open, allow the pins (114) to move from the vertical position outwards without colliding with the press plate (131), as can be better seen in FIG. 18.

[0140] The present invention also relates to the method for forming multipacks of cans through the system for forming multipacks that is part of this invention, where a preferred embodiment of said method is directed to the formation of multipacks of thin cans, which comprises the following steps: a) providing two longitudinal rows (f 1 , f2) of cans (B) in a feed line of a system (1) for forming multipacks (P) of cans, comprising a conveyor mechanism (20), a dosing mechanism (30) and an applicator station (10) comprising at least two pivoting devices (110) opposite each other; (FIG. l) b) arranging the two rows (fl, f2) of cans one on each side of a longitudinal separator plate (25) located in a first (21) and second section (23) of the conveyor mechanism (20); (FIG.(FIG.l) c) advancing the two rows (fl, f2) of cans until they pass through the dosing mechanism (30) comprising two spaced-apart rotating dosing wheels (31); (FIG.l) d) simultaneously with step c), pivoting the pivoting devices (110) in an inclined position until a rounded edge (117) of a longitudinal projection (116) present on a lower face (118) of the pivoting devices (110) tangentially touches the mantle of the cans (B); (FIG.19) e) quantifying the quantity of cans that pass through the dosing mechanism (30) until a first batch (E) of six cans (B) is centered in front of the two pivoting devices (110) of the application station that are in an inclined position; (FIG.20) f) interrupting the rotation of the metering wheels (31); g) rotating the metering wheels (31) in the opposite direction to the advance of the cans, for a distance sufficient to generate a clearance space (h) between the end of the first batch (E) of six cans to be processed and a second batch (E') of cans on the way; (FIG.20) h) simultaneously with step g) placing a multiple template (A) for thin cans on a retractable tray (121) of the feeder mechanism (12); (FIG.21) i) moving the at least one external voting device (110b) into a horizontal position (FIG.22) so that its separating portions (112) (FIG.23) are arranged between the cans (B) of the outer row and laterally separate the cans from each other according to the different widths of their separating portions (112); and so that the pins (114) arranged on the longitudinal upper face of the outer pivoting device (110b) are arranged vertically, perpendicular to the upper plane of the cans (B); j) move the retractable tray (121) to a provision position towards the advance line, until it is positioned, together with the template (A) that it carries on itself, on the upper plane of the cans (FIG. 24), advancing until the centering notches on the outer edge of the template abut the pins (114) of the outer pivoting device (110b); k) pivot the at least one inner pivoting device (110a) towards a horizontal position (FIG.25), so that its separating portions are arranged between the cans of the outer row and laterally separate the cans from each other according to the widths of said separating portions; and at the same time so that some pins (114) arranged on the longitudinal upper face of the inner pivoting device (110a), are arranged vertically, perpendicular to the upper plane of the cans and abut the centering notches of the inner edge of the template (A); l) move the retractable tray (121) to a retraction position (FIG. 26), to leave the template (A) deposited on the upper plane of the cans (B), retained by the pins (114) of the inner pivoting device (110a); m) lower the press plate (131) on the cans already positioned with their upper template (A), so that the template (A) is deformed in a controlled manner thanks to the applicator plate (132) (FIG.27), and the template's coupling openings are coupled around the upper ring of each can and so that the weakened fold lines joining the templates are broken; n) raise the press plate (131) and applicator plate (132) assembly to its upper initial position; o) simultaneously with step n), pivot both pivoting devices (110) opposite each other, simultaneously, from their horizontal position to their inclined position (FIG. 28) to release the advance of the packages (P) of cans already formed with the template A.

Claims

CLAIMS 1. System (1) for forming multiple packs (P) of beverage cans (B), which allows multiple functions to be integrated into a single component to provide a simple and economical system; it comprises a conveyor mechanism (20) with two rows (fl, f2) of parallel cans, separated from each other by a longitudinal separator plate (25), to advance said two rows of cans towards a dosing mechanism (30) formed by two opposite toothed wheels (31) that count the cans that pass towards an application station (10) where a multiple template (A) is coupled on the upper plane of a batch of cans, said application station (10) comprising a press mechanism (13), a template feeder mechanism (12) and a can positioning mechanism (11), which determines the lateral position between cans and between groups of cans, and also,ensures the positioning of the multiple template on the cans; CHARACTERIZED in that the can positioning mechanism (11) comprises at least two multifunctional pivoting devices (110), opposite each other, arranged one on each side of the rows (fl, f2) of cans, which comprise a straight elongated body with a longitudinal inner face (113), a longitudinal outer face (119) opposite the longitudinal inner face (113) and two end faces (120) opposite each other, transverse to the longitudinal faces (113, 119), from which an eccentric longitudinal pivot axis (160) projects, the longitudinal inner face (113) being provided with concave curved recesses (111) interspersed with separating portions (112) of variable width, a longitudinal projection (116) with a rounded edge (117),the eccentric longitudinal axis (160) being oriented parallel to the feed line of the cans so that said multifunctional pivoting devices (110) pivot between a lateral holding and positioning position between the cans and a guided release position of the cans; and wherein the multifunctional pivoting devices (110) comprise at least two pins (114) spaced laterally from each other and arranged perpendicularly on an upper longitudinal face (115) of the multifunctional pivoting devices (110), arranged spaced from each other to center, on an upper plane of the group of cans, a multiple template (A) provided by a horizontal retractable tray (121) of the feed mechanism (12) that moves orthogonal to the feed line of the cans and that has a width smaller than the lateral distance between two pins (114) of a multifunctional pivoting device,and where said lateral distance between two pins (114) is equivalent to the distance between at least two open end notches of a press plate (131) of the press mechanism (13).

2. Intermittent system (1) to form multiple packs (P) of cans (B), according to the Claim 1, CHARACTERIZED in that said at least two multifunctional pivoting devices (110) opposite each other correspond to an inner pivoting device (110a) located on a side adjacent to the template feeder (12); and an outer pivoting device (110b) located on the side opposite to that where the template feeder (12) is arranged.

3. Intermittent system (1) for forming multiple packages (P) of cans (B), according to claim 1, CHARACTERIZED in that the can positioning mechanism (11) comprises two pivoting devices (110) on each side of the feed line, parallel to each other; two correspond to upper pivoting devices (HOs) and two correspond to lower pivoting devices (HOi).

4. Intermittent system (1) for forming multiple packages (P) of cans (B), according to claim 3, CHARACTERIZED in that said two upper pivoting devices (HOs) each comprise at least two pins (114) arranged perpendicularly on their longitudinal upper face (115).

5. Intermittent system (1) for forming multiple packages (P) of cans (B), according to claim 3, CHARACTERIZED in that said upper pivoting device (HOs) and lower pivoting device (1 lOi), pivot together with each other thanks to a connecting rod (140) that transmits force generated by an actuator (150) arranged to produce the pivot movement of said pivoting devices.

6. Intermittent system (1) for forming multiple packages (P) of cans (B), according to claim 1, CHARACTERIZED in that the horizontal retractable tray (121) of the feeder mechanism (12) comprises a body in the form of a flat plate with a straight projection (124) located on its rear edge (125), oriented parallel to the can feed line.

7. Intermittent system (1) for forming multiple packages (P) of cans (B), according to claim 1, CHARACTERIZED in that the horizontal retractable tray (121) of the feeder mechanism (12) moves orthogonal to the direction of advance of the cans, between a retraction position, to take a template (A) dispensed from a template magazine (122) by means of an arrangement of pivoting suction cups (123), and a provision position, to arrange the template on the upper face of a group of cans.

8. Intermittent system (1) for forming multiple packs (P) of cans (B), according to claim 1, CHARACTERIZED in that the press mechanism (13) comprises a horizontal press plate (131) with longitudinal edges (134) opposite each other comprising at least two open-end notches (135); and comprises a template applicator plate (132), arranged on a lower face of the press plate (131), comprising opposite longitudinal edges (136) having at least two open-end notches (137).

9. Intermittent system (1) for forming multiple packages (P) of cans (B), according to claim 8, CHARACTERIZED in that the open end notches (134) of the press plate (131) and the open end notches (137) of the applicator plate (132) are vertically aligned with each other.

10. Intermittent system (1) for forming multiple packages (P) of cans (B), according to claims 1 and 8, CHARACTERIZED in that said at least two open end notches (134, 137) of each of the longitudinal edges (134, 136), both of the press plate (131) as well as the applicator plate (132), are spaced apart from each other by a distance equal to the lateral distance between pins (114) of the same pivoting device (110).

11. Intermittent system (1) for forming multiple packages (P) of cans (B), according to claim 1, CHARACTERIZED in that the press mechanism (13), the template feeder mechanism (12) and the positioning mechanism (11) of the cans that make up the application station (10), are located at the same point of the advance line.

12. Multifunctional pivoting device (110) for positioning a group of cans fed in an intermittent system to form multiple packs of cans, capable of guiding the advance longitudinal of the cans; capable of providing lateral positioning between cans; capable of providing alignment between the template, the cans and a press mechanism of a system; and capable of generating retention of a multiple template on the upper plane of a set of cans, CHARACTERIZED in that it comprises a straight elongated body, defined by an upper longitudinal face (115) that carries at least two pins (114) perpendicular and laterally spaced from each other; a lower longitudinal face (118) provided with a longitudinal projection (116) with a rounded longitudinal edge (117); a longitudinal inner face (113) provided with concave curved recesses (111) interspersed with separating portions (112); a longitudinal outer face (119), opposite the longitudinal inner face (113); and two end faces (120) opposite each other, transverse to the longitudinal faces, from which an eccentric longitudinal pivot axis (160) projects.

13. Multifunctional pivoting device (110), according to claim 12, CHARACTERIZED in that said separating portions (112) arranged between the concave curved recesses (111) comprise a front edge (1121), from said front edge each separating portion has a convex curved lower development (1122) and where this width of the front edge of the separating portions grows progressively until it merges with the bottom area of the adjacent curved recesses.

14. Multifunctional pivoting device (110), according to claim 12, CHARACTERIZED in that the width of said front edge (1121) is the same in all the separating portions (112) of the pivoting device (110).

15. Multifunctional pivoting device (110), according to claim 12, CHARACTERIZED in that the width of said front edge (1121) is different in some separating portions (112), defining wide separating portions (1123) and pointed separating portions (1124).

16. Multifunctional pivoting device (110), according to claim 12, CHARACTERIZED in that said concave curved recesses (111) comprise a curved wall (lili) extended perpendicular to the longitudinal upper face (115), which is defined by a curved bottom area (1112) and lateral end areas (1113) that border on respective separating portions (112).

17. Multifunctional pivoting device (110), according to claim 12, CHARACTERIZED in that the eccentric longitudinal axis (160) is located displaced towards the longitudinal lower face (118) of the device and adjacent to the rounded edge (117) of the longitudinal projection (116).

18. Multifunctional pivoting device (110), according to claim 12, CHARACTERIZED in that the distance (m) from the eccentric longitudinal axis (160) to the lower face (118), is greater than the distance from the same eccentric longitudinal axis (110) towards the end of the rounded edge (117).

19. Multifunctional pivoting device (110), according to claim 12, CHARACTERIZED in that said at least two pins (114) that are located on the upper face (115) of the pivoting device, are laterally spaced apart from each other by a distance equivalent to the distance between two notches (a5) of the outer edge (a4) of a multiple template (A).

20. Multifunctional pivoting device (110), according to claim 12, CHARACTERIZED in that the pivoting device (110) comprises six concave curved recesses (111) interspersed with five separating portions (112) equal to each other.

21. Multifunctional pivoting device (110), according to claim 12, CHARACTERIZED in that the pivoting device (110) comprises six concave curved recesses (111), where in each two of them the separating portion (112) has a greater width than the separating portion between said two concave curved recesses.

22. A method for forming multiple packs of thin format cans through the intermittent system for forming multiple packs, described in claim 1, wherein this method allows an optimization of the operation time, ensures the adequate positioning between the cans and a multiple template for thin cans, and allows to provide clearance spaces between each batch of processed cans; the method CHARACTERIZED in that it comprises the steps of: a) providing two longitudinal rows of thin cans in a feed line of a system for forming multiple packs of cans, comprising a conveyor mechanism, a dosing mechanism and an applicator station comprising at least two pivoting devices opposite each other configured to operate with cans thin; b) arranging the two rows of cans, one on each side of a longitudinal separator plate located in a first and second section of the conveyor mechanism; c) advancing the two rows of cans until they pass through the dosing mechanism comprising two rotatable dosing wheels spaced apart from each other; d) simultaneously with step c), pivoting the pivoting devices in an inclined position until a rounded edge of a longitudinal projection present on a lower face of the pivoting devices tangentially touches the mantle of the cans; e) quantifying the quantity of cans that pass through the dosing mechanism until a first batch of cans is centered in front of the two pivoting devices of the application station that are in an inclined position; f) stopping the rotation of the dosing wheels;g) turning the metering wheels in the opposite direction to the advance direction, for a distance sufficient to generate a clearance space between the end of the batch of cans to be processed and a second batch of cans in progress; h) simultaneously with step g) placing a multiple template for thin cans on a retractable tray of the feeder mechanism; i) pivoting the at least one exterior pivoting device to a horizontal position; so that its separating portions are arranged between the cans of the exterior row and laterally separate the cans from each other according to the widths of said separating portions; and so that centering pins arranged on the upper longitudinal face of the exterior pivoting device are arranged vertically, perpendicular to the upper plane of the cans;j) move the retractable tray to a provision position towards the advance line, until it is positioned, together with the template it carries, on the upper plane of the cans, advancing until the centering notches on the outer edge of the template come into contact with; the pins of the outer pivoting device; k) pivoting the at least one inner pivoting device into a horizontal position so that its separating portions are arranged between the cans of the outer row and laterally separate the cans from each other according to the widths of said separating portions; and at the same time so that centering pins arranged on the upper longitudinal face of the inner pivoting device are arranged vertically, perpendicular to the upper plane of the cans and abut the centering notches on the inner edge of the template; l) moving the retractable tray to a retraction position, to leave the template deposited on the upper plane of the cans, retained by the pins of the inner pivoting device;(m) lowering the press plate onto the batch of cans already positioned with their upper template, so that the template deforms in a controlled manner and the template's coupling openings fit around the upper rim of each can and so that the weakened fold lines joining the templates are broken; (n) raising the press plate to its initial upper position; (o) simultaneously with step (n) pivoting both pivoting devices opposite each other, simultaneously, from their horizontal position to their inclined position to release the advancement of the already formed can packs; 23. A method for forming multiple packs of standard format cans through the intermittent system for forming multiple packs, described in claim 1, wherein this method allows an optimization of the operating time, ensures the proper positioning between the cans and a multiple template; the method CHARACTERIZED in that it comprises the steps of: a) providing two longitudinal rows of standard size cans in a feed line of a system for forming multiple packs of cans, comprising a conveyor mechanism, a dosing mechanism and an applicator station comprising at least two pivoting devices configured to operate with standard cans; b) advancing the two rows of cans until they pass through the dosing mechanism comprising two rotatable dosing wheels spaced apart from each other; c) simultaneously with step b), pivoting the pivoting devices in an inclined position until a rounded edge of a longitudinal projection present on a lower face of the pivoting devices tangentially touches the mantle of the cans; d) quantifying the quantity of cans that pass through the dosing mechanism until a first batch of cans is centered in front of the two pivoting devices of the applicator station that are in an inclined position; e) simultaneously with step d) arranging a multiple template for standard cans on a retractable tray of the feeder mechanism; f) pivoting the at least one external pivoting device to a horizontal position;so that its separating portions are arranged between the cans of the outer row and position the cans laterally with respect to each other; and so that centering pins arranged on the upper longitudinal face of the outer pivoting device are arranged vertically, perpendicular to the upper plane of the cans; g) moving the retractable tray to a provision position towards the advance line, until it is positioned, together with the template it carries, on the upper plane of the cans, advancing until the centering notches on the outer edge of the template abut the pins of the outer pivoting device; h) pivoting the at least one inner pivoting device to a horizontal position so that its separating portions are arranged between the cans of the outer row and position the cans laterally with respect to each other;and at the same time so that centering pins arranged on the longitudinal upper face of the inner pivoting device are arranged vertically, perpendicular to the upper plane of the cans and abut against the centering notches on the inner edge of the template; i) move the retractable tray to a retracted position, to leave the template deposited on the upper plane of the cans, retained by the pins of the pivoting device; (j) lowering the press plate onto the batch of cans already positioned with their upper template, so that the template deforms in a controlled manner and the template's coupling openings fit around the upper rim of each can and so that the weakened fold lines joining the templates are broken; (k) raising the press plate to its upper initial position; (l) simultaneously with step (k), pivoting both pivoting devices opposite each other simultaneously from their horizontal position to their inclined position to release the advance of the already formed standard can packs.

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