Container with improved closure and method of closing thereof

Abstract

A container (1) for food products of fruit and vegetables type comprises a bottom wall (2), a plurality of side walls (3, 4, 5, 6) and a lid (7) movable at least between an open position (P0) and a closed position (P1) about a rotation axis (A). The lid (7) extends between a first edge (7A) coinciding with the rotation axis (A) and a second edge (7B) defining at least a flap (71; 72, 73) insertable in at least a slot (41; 42, 43) to maintain the lid (7) in the closed position (P1). The second edge (7B) comprises a stretch (T1) that develops between a first point and a second point in correspondence with the flap (71; 72, 73) and that defines a distance function which is strictly monotonic.

Description

FIELD OF THE INVENTION

[0001] The present invention relates to a container. In detail, the present invention refers to a container for food products, in particular fruit and / or vegetables. The invention finds particular application in the field of manual and automated packaging of food products, in particular fruit and vegetable products, preferably of small size.

[0002] The present invention further relates to a method of closing said container. Furthermore, the present invention relates to a process of packing food products.

[0003] In addition, the present invention further relates to an automated packing system for food products.STATE OF THE ART

[0004] In the food field, in particular in the fruit and vegetable field, the need to have containers suitable for a safe distribution and a long-term storage of preestablished quantities of food products is particularly strongly felt.

[0005] With regard to the distribution of small-sized fruit and vegetable products, for example berries (blueberries, raspberries, strawberries, blackberries, etc.), it is known the use of containers in the form of trays suitable for containing a predetermined quantity of product, which typically ranges from 100g to 500g. In order to reduce the environmental impact resulting from the distribution, these containers are typically made of cardboard, allowing a convenient disposal and facilitating the recycling.

[0006] Generally, these containers are of the resealable type so as to allow an adequate protection of the food products contained therein and reduce the risk of dispersion due to spillage.

[0007] As of today, known containers provide a box-shaped body comprising a bottom wall and a plurality of side walls that define a containment compartment for the products to be packaged. Furthermore, containers comprise a movable top wall that acts as an openable lid for allowing or preventing selectively the access to the storage compartment. The top wall is typically hinged to one of the side walls to rotate between a closing position, in which it prevents the access to the containment compartment, and an opening position, in which it allows the access to the containment compartment, for example to perform the filling or extraction operations of food products.

[0008] In order to prevent the unintended leakage of at least part of the food products, containers as of today available on the market are provided with locking mechanisms suitable for keeping the top wall in the closing position. Specifically, such locking mechanisms are configured to avoid the free rotation of the top wall, which is kept in the closing position unless an intentional operation by the end consumer who wants to extract one or more products contained inside the containment compartment.

[0009] Among the available solutions, the closing mechanism are particularly appreciated in which the top wall is provided with a flap, generally of substantially rectangular shape, suitable for being inserted in a slot formed in one of the side walls of the container. In such context, one of the possible technical solutions provides for the presence of a rigid flap, i.e. non-folding, protruding from the portion of the top wall suitable for closing selectively the opening of the containment compartment. The advantage of these solutions is an optimal hold of the closing position, thus preventing accidental openings of the container. In fact, when the top wall is moved from the open position to the closing position, the flap interferes with the side wall in which the slot is made, deforming it elastically. Once the inclination coinciding with the closing position is reached, the flap is inserted in the slot and the side wall is released, returning to its original resting position. In this way, the flap is trapped inside the slot and the top wall is held in the closing position. In fact, in the closing position, the top wall and the remaining structure of the container are coupled together by a mechanism substantially equivalent to a snap-fit mechanism, which can only be released with a considerable pressure by the end consumer.

[0010] However, it is known that such containers show some problems, mainly related to the rigidity of the flap of the top wall when the latter interferes with the side wall in which the slot is made. In fact, both in manual operations and, above all, in automated systems, the sliding contact between the flap and the side wall can cause certain problems, such as faulty closures or even breakages of at least part of the container structure. In fact, the automated systems for packing food products provide for a filling station located upstream of a closing station, in which the top wall is first brought into interference with the side wall and then pressed downwards along a vertical direction until the closing position is reached. Due to the considerable force required to reach the closing position, it has been found that a non-negligible part of the containers have a compromised structure and / or a defective closure, with evident issues in terms of both the quality of the finished product and in terms of the costs of the entire packing system.OBJECT OF THE INVENTION

[0011] The general object of the present invention is therefore to solve at least one of the drawbacks and / or limitations of the solutions of the known art.

[0012] An object of the invention is to provide a container for food products, in particular small food products, which has a closure that is particularly easy to use with respect to the solutions of the known art.

[0013] Another object of the present invention is to provide a container for fruit and vegetable products, in particular small fruit and vegetable products, for example berries.

[0014] Another object of the present invention is to provide a container in which the force required to reach the closing position results considerably reduced with respect to known solutions in the field.

[0015] Yet another object of the present invention is to provide a container in which the risk of defective closures and / or breakages, even partial ones, resulting from closing operations is minimized with respect to solutions of known art. Another object of the present invention is to provide a container that can be used in automated systems due to the easy replicability of optimal closing operations.

[0016] Yet another object of the present invention is to describe a container that makes manual opening and closing operations particularly easy for a consumer.

[0017] A further object of the present invention is to provide a container with a particularly low production cost.

[0018] Another object of the present invention is to provide a container with a simple, solid, and durable structure.

[0019] Yet another object of the present invention is to provide a method of closing the above-mentioned container for food products.

[0020] Another object of the present invention is to provide a method of closing the above-mentioned container that results easily implementable.

[0021] Another object of the present invention is to describe a method of closing the above-mentioned container that results reproducible with regularity in an optimal way, so as to allow its implementation in an automated packing system.

[0022] A further object of the present invention is to provide a method of closing the above-mentioned container that minimizes the risk of defective closures and / or even partial breakages of the structure of the container itself.

[0023] Yet another object of the present invention is to make available a method of closing the above-mentioned container that is easily implementable and replicable even manually by the end consumer.

[0024] Another object of the present invention is to provide a packing process of the above-mentioned container. In particular, object of the present invention is to make available a packing process that comprises the above-mentioned method of closing a container.

[0025] Yet another object of the present invention is to show a food packing system suitable for an automated implementation of the above-mentioned packing process.

[0026] A further object of the present invention is to make available an automated packing system that allows a high productivity, ensuring an optimal quality of the closures of the containers and minimizing, at the same time, the risks of defective closures and / or breakages, even partial ones, of the processed containers.

[0027] These objects, and any others, which will better result in the following description, are substantially achieved by a container for food products, a method of closing said container, a packing process of food products, and an automated packing system of food products according to one or more of the attached claims, each taken alone (without its dependencies) or in any combination with the other claims, as well as according to the following aspects and / or embodiments, variously combined, also with the above-mentioned claims.SUMMARY

[0028] According to a first aspect, the present invention refers to a container for food products, in particular fruit and vegetable products.

[0029] In the present document, with the expression "food products" or "foodstuffs" are identified all those substances or products destined to be consumed by the human being for his or her sustenance. The container object of the present invention finds particular application in the field of packing of fruit and vegetable products, i.e. in the packing of fruits and / or vegetables. In particular, the container object of the present invention can be used for the packing of fruit and vegetable products of reduced size, such as, for example, berries (blueberries, raspberries, strawberries, blackberries, ...).

[0030] In an aspect, said container comprises: a bottom wall; a plurality of side walls extending from said bottom wall; a lid movably associated to a side wall of said plurality of side walls.

[0031] According to the preceding aspect, said plurality of side walls and said bottom wall jointly define a storage compartment having an opening opposite to said bottom wall. According to this aspect, said storage compartment is capable of accommodating said food products. Specifically, said storage compartment represents the volume wherein are stored the food products and results upperly open for allowing the deposit and / or the extraction of said food products in / from the container.

[0032] According to the preceding aspect, said lid results selectively movable at least between an open position, wherein it is allowed or facilitated an access to said storage compartment through said opening, and a closed position, wherein is prevented or hampered the access to said storage compartment through said opening. In other terms, the lid selectively acts as closure for said storage compartment allowing the deposit and / or the extraction of said food products in / from the container when in the open position and preventing the accidental spillage and / or contamination of said food products when in the closed position.

[0033] In an aspect, said plurality of side walls comprises at least: a first side wall, said lid being jointed, in particular hinged, to said first side wall to rotate about a rotation axis; a second side wall comprising at least a slot, in particular at least a slot substantially parallel to said bottom wall.

[0034] Specifically, said at least a slot represents a slit passing through the second side wall having a direction of main development (e.g., the width) with respect to the remaining two sizes (e.g. height and depth).

[0035] In an aspect, said lid extends at least between a first edge contiguous or adjacent to said first side wall and a second edge overlapping said second side wall. According to such aspect, said second edge is configured to define at least a flap insertable in said at least a slot to maintain, in particular stably maintain, said lid in said closed position. Specifically, the insertion of said at least one flap in said at least a slot acts as locking mechanism of said lid in said closed position.

[0036] In an aspect, said second edge of said lid comprises at least a first stretch extending between a first point and a second point, said first point and said second point being two distinct points of said second edge in correspondence with said at least one flap.

[0037] In an aspect, defining a function of the type y = f(x), wherein: x corresponds to the distance, measured along a development of said second edge, of a generic point of said first stretch from said first point; and Y corresponds to the distance of said generic point of said first stretch from said rotation axis; said function y = f(x) is a strictly monotonic function.

[0038] In an aspect, said function y = f(x) is a continuous function. According to such aspect, said first stretch does not have sudden changes of distance from said rotation axis.

[0039] In an aspect, a first derivative of the function y = f(x) on said first stretch is always definable and does not assume infinite, or substantially infinite, values. In an aspect, said function y = f(x) is a strictly increasing monotonic function. According to such aspect, said first stretch has a distance from said rotation axis that increases, preferably in a gradual way, from said first point to said second point.

[0040] In an aspect, said container is made of paper material. In a preferential aspect, said container is made of cardboard, more preferably in corrugated cardboard.

[0041] In an aspect, said lid is a substantially planar element having a rigid structure. In other terms, said lid is a substantially two-dimensional element.

[0042] In an aspect, said first stretch of said second edge is configured to function, during a transition of said lid from said open position to said closed position, as divaricating element for said second side wall with respect to said first side wall, to enable an insertion of said at least one flap into said at least one slot. In an aspect, during a transition of the position of said lid from said open position to said closed position, said lid is in an interference condition, wherein said at least one flap comes in contact with said second side wall and elastically deforms said plurality of side walls and said storage compartment. According to such aspect, in said interference condition, said at least one flap pushes against said second side wall, temporarily deforming said storage compartment. According to such aspect, in the passage from said open position and said closed position, said lid passes in said interference condition and said at least a flap spreads said second side wall with respect to said first side wall.

[0043] In an aspect, said second edge does not have discontinuities. According to such aspect, said second edge does not have sudden changes of distance from said rotation axis.

[0044] In an aspect, said second edge has a gradual and continuous development. In an aspect, said second edge does not have stretches substantially perpendicular to said rotation axis.

[0045] In an aspect, a distance between said second edge and said rotation axis gradually varies substantially along the whole development of said second edge. According to such aspect, the distance value between said second edge and said rotation axis does not have discontinuities or sudden value changes. In an aspect, said lid comprises a closure surface, adapted to cover said opening in said closed position. According to such aspect, said at least a flap extends continuously from said closure surface.

[0046] In an aspect, said at least a flap extends in a gradual and progressive way from said closure surface. According to such aspect, said at least a flap emerges from the closure surface in a continuous way, i.e. gradual and without surges.

[0047] In an aspect, said closure surface and said at least a flap are substantially integral with one another. In an aspect, said closure surface and said at least a flap are not movable with one another. In other terms, said at least a flap is substantially fixed in position, i.e. not movable, related to the closure surface from which emerges.

[0048] In an aspect, said at least a flap is connected to said closure surface.

[0049] In an aspect, said first point of the first stretch represents a connection point between said at least one flap and said closure surface.

[0050] In an aspect, said third point of the second stretch represents a connection point between said at least one flap and said closure surface.

[0051] In an aspect, said closure surface and said at least a flap substantially lie on a same plane.

[0052] In an aspect, said first stretch is an at least partially curved stretch.

[0053] In an aspect, said first stretch comprises at least two curved portions having radii of curvature that differ from one another.

[0054] In an aspect, said first stretch is an at least partially straight stretch.

[0055] In an aspect, said first stretch has an inclination relative to said rotation axis different from 90°, preferably less than 60° or greater than 120°, more preferably less than 45° and greater than 135°. Still preferably, said first stretch has an inclination relative to said rotation axis less than 30° or greater than 150°, more preferably less than 20° and greater than 160°.

[0056] In an aspect, said first stretch comprises a plurality of straight portions having angles relative to said rotation axis that differ from one another.

[0057] In an aspect, said first stretch comprises at least a curved portion and at least a straight portion.

[0058] In an aspect, said second edge of said lid comprises a second stretch, distinct from said first stretch, that extends between a third point and a fourth point. According to such aspect, said third point and said fourth point are two distinct points of said second edge in correspondence with said at least a flap such that the distance, measured along said second edge, of said third point from said first point is greater than the distance of said fourth point from said first point.

[0059] According to the preceding aspect, defining a function of the type a = f(b), wherein: a corresponds to the distance, measured along said second edge, of a generic point of said second edge from said third point; and b corresponds to the distance of said generic point of said second stretch from said rotation axis; said function a = f(b) is a strictly monotonic function.

[0060] In an aspect, said function a = f(b) is a continuous function. According to such aspect, said second stretch does not have sudden changes of distance from said rotation axis.

[0061] In an aspect, a first derivative of the function a = f(b) on said second stretch is always definable and does not assume infinite, or substantially infinite, values.

[0062] In an aspect, said function a = f(b) is a strictly increasing monotonic function. According to such aspect, said second stretch has a distance from said rotation axis that increases, preferably in a gradual way, from said third point to said fourth point.

[0063] In an aspect, said first stretch and said second stretch are symmetric to each other, preferably with respect to an axis perpendicular to said rotation axis. In an aspect, each flap of said lid comprises both said first stretch and said second stretch.

[0064] In an aspect, said second point coincides with said fourth point. According to such aspect, said first stretch and said second stretch are continuous with each other along the development of said second edge.

[0065] In an aspect, said second point is distinct from said fourth point. According to such aspect, said first stretch and said second stretch are separate from each other by at least a further stretch of said second edge.

[0066] In an aspect, said at least a further stretch is parallel to said rotation axis. In an aspect, said plurality of side walls comprises at least a third side wall, arranged to at least partially connect said first side wall and said second side wall.

[0067] In an aspect, said plurality of side walls comprises at least a fourth side wall, arranged to at least partially connect said first side wall and said second side wall.

[0068] In an aspect, said third side wall and said fourth side wall are opposite to each other. According to such aspect, said first side wall and said second side wall are opposite to each other. Consequently, also said first edge and said second edge represent opposite edges of said lid.

[0069] In an aspect, said bottom wall extends in a horizontal plane.

[0070] In an aspect, said plurality of side walls extends from said bottom wall predominantly along a vertical axis. According to such aspect, said vertical axis is orthogonal to said horizontal plane.

[0071] In an aspect, each wall of the plurality of side walls lies in a plane orthogonal to the horizontal plane, i.e. is parallel to said vertical axis.

[0072] In an aspect alternative to the preceding one, at least a wall of the plurality of side walls lies in a plane inclined with respect to the vertical axis. According to such aspect, said at least a side wall has a development away from said bottom wall along said vertical axis.

[0073] In an aspect, each wall of said plurality of side walls lies in a plane that forms an angle from 0° to 80° with said vertical axis, or with an axis parallel to the vertical axis.

[0074] In an aspect, in said closed position, said lid lies in a plane substantially parallel to said horizontal plane.

[0075] In an aspect, said second side wall has a development along said vertical axis greater than the remaining side walls of said plurality of side walls.

[0076] In an aspect, said bottom wall has substantially quadrangular shape, preferably rectangular. According to such aspect, said plurality of side walls comprises four side walls. Therefore, said container has a substantially parallelepiped shape.

[0077] In an aspect, said opening and said closure surface have substantially quadrangular shape, preferably rectangular. According to such aspect, said at least a flap extends from a side of main development of said closure surface. In an aspect, said first edge represents a side of main development of said lid.

[0078] In an aspect, said first edge coincides with a zone of continuity between said lid and said first side wall.

[0079] In an aspect, said first edge has at least one structural weakening in correspondence with said rotation axis. According to such aspect, said at least a structural weakening comprises at least a slit provided substantially in correspondence with said first edge.

[0080] In an aspect, said first edge has an area processed with a creasing technique in correspondence with said rotation axis, i.e. in said zone of continuity between said lid and said first side wall.

[0081] In an aspect, said lid has a substantially symmetric shape with respect to a symmetry axis.

[0082] In an aspect, said rotation axis and said symmetry axis are perpendicular to each other.

[0083] In an aspect, said plurality of side walls and / or said lid comprise at least one window configured to allow an inspection of said storage compartment. According to such aspect, said at least a window allows to observe inside said storage compartment, and then the food products herein housed, also with said lid in said closed position.

[0084] In an aspect, said at least one window is configured to be at least partially obstructed by a layer of transparent material.

[0085] In an aspect, said layer of transparent material comprises a plastic film. In a preferred aspect, said layer of transparent material comprises a cellophane film.

[0086] In an aspect, said layer of transparent material comprises at least one passage, or hole, configured to allow an air exchange between said storage compartment and an external environment.

[0087] In an aspect, said lid comprises a sole flap and said second side wall comprises a sole slot.

[0088] In an aspect alternative to the preceding one, said lid comprises two or more flaps, distanced from each other by at least a stabilizing segment, and said second side wall comprises two or more slots distinct and distanced from each other. According to such aspect, each slot is configured to accommodate a related flap when said lid is in said closed position. Still according to such aspect, said at least a stabilizing segment is configured to contact and striking the second side wall, in the area interposed between the two slots, when said lid is in said closed position.

[0089] According to a further aspect, the present invention refers also to a method of closing a container according to one or more of the previously introduced aspects.

[0090] In an aspect, said method of closing comprises the following steps: disposing said container with said lid in said open position; moving said lid toward said closed position until contacting said second side wall; pressing said lid toward said closed position by applying a pressure toward said bottom wall substantially at said second edge and progressively varying a point of application of said pressure along a direction which goes from said first point to said second point; inserting said at least one flap in said at least a slot and bringing said lid in said closed position.

[0091] In an aspect, said step of pressing said lid toward said closed position is performed along an entire development of said second edge.

[0092] In an aspect, said step of pressing said lid determines a concurrent divarication of said second side wall with respect to said first side wall when said pressure is applied substantially in correspondence with said first stretch. According to such aspect, said step of pressing said lid towards said closed position involves the passage of said lid in said interference condition.

[0093] In an aspect, said divarication of said second side wall relative to said first side wall determines an elastic deformation of said container by means of an interference of said at least one flap with said plurality of side walls, in particular said second side wall.

[0094] In an aspect, said step of inserting said at least a flap in said at least a slot involves the release of said plurality of side walls.

[0095] In an aspect, said step of pressing said lid towards said closed position provides for exerting a pressure the point of application thereof progressively varies along a direction parallel to said rotation axis at substantially said second edge.

[0096] In an aspect, the present invention refers also to a packing process of food products, in particular fruit and vegetable products.

[0097] According to the preceding aspect, said packing process comprising the following steps: Providing a container according to one or more of the previously introduced aspects; disposing said container with said lid in said open position; placing a determined quantity of said food products in said storage compartment; moving said lid toward said closed position until contacting said second side wall; pressing said lid toward said closed position by applying a pressure toward said bottom wall substantially at said second edge and progressively varying a point of application of said pressure along a direction which goes from said first point to said second point; inserting said at least one flap in said at least a slot and bringing said lid in said closed position.

[0098] In an aspect, said step of pressing said lid toward said closed position is performed along an entire development of said second edge.

[0099] In an aspect, said step of pressing said lid determines a concurrent divarication of said second side wall with respect to said first side wall when said pressure is applied substantially in correspondence with said first stretch. According to such aspect, said step of pressing said lid towards said closed position involves the passage of said lid in said interference condition.

[0100] In an aspect, said divarication of said second side wall relative to said first side wall determines an elastic deformation of said container by means of an interference of said at least one flap with said plurality of side walls, in particular said second side wall.

[0101] In an aspect, said step of inserting said at least a flap in said at least a slot involves the release of said plurality of side walls.

[0102] In an aspect, said step of pressing said lid towards said closed position provides for exerting a pressure the point of application thereof progressively varies along a direction parallel to said rotation axis at substantially said second edge.

[0103] Yet in another aspect, the present invention refers also to an automated packing system of food products, in particular fruit and vegetable products. In an aspect, said automated packing system comprises a conveyor belt, configured to receive at least one container, preferably a plurality of containers, and to move said at least one container along a path of advancement.

[0104] In an aspect, said packing system comprises a feeding station, operatively associated to said conveyor belt. According to such aspect, said feeding station is configured to deposit said at least a container on said conveyor belt. In an aspect, said feeding station is configured to deposit said at least a container on said conveyor belt with said lid already in open position and / or comprises an opening mechanism suitable for bringing said lid in open position.

[0105] In an aspect, said packing system comprises a loading station of said food products, operatively associated to said conveyor belt. According to such aspect, said loading station is configured to deposit a predefined quantity of said food products in said storage compartment of said at least a container. In an aspect, said packing system comprises a closing station of said at least a container, operatively associated to said conveyor belt. According to such aspect, said closing station is configured to move said lid in said closed position.

[0106] In an aspect, said closing station comprises a first closing mechanism configured to move said lid toward said closed position until contacting said second side wall. In a preferred aspect, said first closing mechanism comprises a first shaped bar.

[0107] In an aspect, said closing station comprises a second closing mechanism, positioned at least partially downstream of said first closing mechanism. Said second closing mechanism is configured to press said lid toward said closed position by applying a pressure toward said bottom wall substantially at said second edge and progressively varying a point of application of said pressure along a direction which goes from said first point to said second point. In a preferred aspect, said second closing mechanism comprises a second shaped bar.

[0108] In an aspect, said second shaped bar is configured, at first, to divaricate said second side wall with respect to said first side wall and, then, to insert said at least a flap in said at least a slot, bringing said lid in said closed position. Additional characteristics and advantages will result more from the detailed description of more preferred embodiments, but not exclusive, from a container of food products, a method of closing of the above-mentioned container, a packing process of food products and an automated packing system of food products according to the present invention.BRIEF DESCRIPTION OF DRAWINGS

[0109] Some embodiments and some aspects of the invention will be described below with reference to the attached drawings, provided for illustrative purposes only and therefore not limiting, wherein: figure 1 shows a front axonometric view of a first embodiment of a container according to the present invention in a first configuration; figure 2 shows a rear axonometric view of the container of figure 1; figure 3 shows a front axonometric view of the container of figure 1 in a second configuration; figure 4 shows a rear axonometric view of the container of figure 3; figure 5 shows a front axonometric view of a second embodiment of a container according to the present invention in a first configuration; figure 6 shows a rear axonometric view of the container of figure 5; figure 7 shows a front axonometric view of the container of figure 5 in a second configuration; figure 8 shows a rear axonometric view of the container of figure 7; figures 9a to 9f show six different embodiments of a component of the container according to the present invention; figure 10 shows a first embodiment of a method for closing of container according to the present invention; figure 11 shows a second embodiment of the method of closing of container according to the present invention in the context of an automated packing system, which also forms part of the present invention. DETAILED DESCRIPTION

[0110] It should be noted that in the present detailed description corresponding parts shown in the various figures are indicated by the same numerical references.

[0111] Figures could show the object of the invention by means of representations that are not to scale; therefore, parts and components shown in the figures and related to the object of the invention could relate only to schematic representations.

[0112] In the attached figures, a container for food products, hereafter referred to simply as container 1 for the sake of illustrative clarity, has been overall indicated with the numerical reference "1." In the present description, the expression "food products" or "foodstuffs" identify all those substances or products destined to be consumed by the human being for his or her sustenance. Depending on their typology, food products can be of common consumer goods, necessities, luxury goods or non-essential items.

[0113] In particular, container 1 is well suitable for being used in the packing of fruit and vegetable products, that is, in the packing of fruits and / or vegetables. In the present description, reference will be made mainly to the use of container 1 in the context of packing small fruit and vegetable products, such as, for example, berries (blueberries, raspberries, strawberries, blackberries, ...). Merely for the purpose of providing an application example, in Figure 11, container 1 is shown in the context of the packing of blueberries. However, this and other examples should be considered in a purely explanatory and absolutely non-limiting way, since the container 1 can be used to pack any type of food product, whether fruit and vegetables or other types, and of any size. By way of example, container 1 can be used to contain other typologies of fruits (peaches, apricots, cherries, ...), vegetables (tomatoes, radishes, ...), vegetables (carrots, Brussels sprouts, pickles ...), legumes (beans, broad beans, peas, ...) or mushrooms.

[0114] With reference to the attached figures, container 1 comprises: a bottom wall 2; a plurality of side walls 3, 4, 5, 6 extending from said bottom wall 2; a lid 7 movably associated to the plurality of side walls 3, 4, 5, 6.

[0115] As clearly shown in Figures 1 and 5, the bottom wall 2 and the plurality of side walls 3, 4, 5, 6 jointly define a storage compartment 10 having an opening 11 opposite to the bottom wall 2. As will become clear from the present description, the storage compartment 10 is configured to accommodate a predetermined amount of food products. Specifically, the storage compartment 10 represents the volume wherein are stored the food products and is open at the top for allowing the placement and / or the removal of such food products in / from the container.

[0116] In the present description, the terms "above," "over," "upper," "upperly," and equivalent expressions, as well as the terms "under," "below," "lower," "inferiorly," and equivalent expressions, are to be intended as referring to the normal condition of use of container 1, i.e., with the bottom wall 2 to represent a base of the container, the plurality of side walls 3, 4, 5, 6 departing upperly from such bottom wall and the lid 7 placed upperly at a distance from the same bottom wall.

[0117] The lid 7 results selectively movable at least between the following positions: an open position P0 (Figures 1-2 and 5-6) in which the lid 7 allows or facilitates the access to the storage compartment 10 through the opening 11, and a closed position P1 (Figures 3-4 and 7-8) in which the lid 7 prevents or hampers the access to the storage compartment 10 through the opening 11.

[0118] Specifically, in the open position P0, the lid 7 keeps at least partially free the opening 11 allowing the access to the storage compartment 10. Specularly, in the closed position P1, the lid 7 obstructs the opening 11 and effectively closes the storage compartment 10, preventing the access from the outside. In other terms, the lid 7 selectively acts as closure for the storage compartment 10 allowing, in the open position P1, the deposit and / or the extraction of the food products in / from the container or preventing in the closed position P0, the accidental spillage and / or contamination of the food products herein contained.

[0119] Preferably, the bottom wall 2 extends in a horizontal plane X-Y.

[0120] Still preferably, the plurality of side walls 3, 4, 5, 6 extends from the bottom wall 2 predominantly along a vertical axis Z orthogonal to the horizontal plane X-Y. In an embodiment, each wall of the plurality of side walls 3, 4, 5, 6 lies in a plane orthogonal to the horizontal plane X-Y, i.e. is parallel to the vertical axis Z. In other embodiments, at least one wall of the plurality of side walls 3, 4, 5, 6 lies in a plane inclined with respect to the vertical axis Z, keeping however a development away from the bottom wall along the vertical axis Z. According to the embodiment, each wall of the plurality of side walls 3, 4, 5, 6 lies in a plane that forms an angle from 0° to 80° with the vertical axis Z, or with an axis parallel to the vertical axis.

[0121] Still preferably, the opening 11 lies in a plane substantially parallel to the horizontal plane X-Y. Consequently, in the closed position P1, the lid 7 lies in a plane substantially parallel to the horizontal plane X-Y.

[0122] The present description is written with reference to the embodiment shown in the attached figures, in which the container 1 is depicted as a box-shaped body provided with a bottom wall 2 having a substantially quadrangular, specifically rectangular shape. Consequently, the plurality of side walls 3, 4, 5, 6 comprises four side walls angled to each other to define an opening 11 substantially rectangular and the container has overall a parallelepiped shape, in particular when the lid 7 is in the closed position P1. However, such embodiments are to be intended in an illustrative manner only and in no way limiting, since different shapes of the bottom wall 2 (e.g., triangular or hexagonal) and, therefore, a greater or lower number of side walls (e.g., three or six side walls) are still to be considered possible.

[0123] Preferably, the container 1 is made of paper material. In an embodiment, the container 1 is made of cardboard, preferably in corrugated cardboard.

[0124] In the embodiments shown in particular in figures 1-8, the plurality of side walls 3, 4, 5, 6 comprises at least: a first side wall 3; a second side wall 4 opposite to the first side wall 3; a third side wall 5 interposed between the first side wall 3 and the second side wall 4 in particular connecting a side of the first side wall 3 with a corresponding side of the second side wall 4; a fourth side wall 6 interposed between the first side wall 3 and the second side wall 4 in particular connecting another side of the first side wall 3 with a corresponding side of the second side wall 4;

[0125] According to what has been previously stated, embodiments are possible in which one between the third side wall 5 and the fourth side wall 6 is not present (e.g., triangular bottom wall 2) or in which at least one additional wall concurs, together with the third side wall 5 and / or the fourth side wall 6, to connect the first side wall 3 and the second side wall 4 (e.g., hexagonal bottom wall 2).

[0126] Preferably, according to what is shown in figures 1-8, the second side wall 4 has a development along the vertical axis Z greater than the remaining side walls of the plurality of side walls 3, 4, 5, 6. In other terms, the second side wall 4 extends, along the vertical axis Z, from the bottom wall 2 until a maximum height greater than the maximum height of the remaining side walls of the plurality of side walls 3, 4, 5, 6.

[0127] Furthermore, the second side wall 4 comprises at least one slot 41, 42, 43, in particular at least one slot substantially parallel to the bottom wall 2. Specifically, each slot 41, 42, 43 represents a slit passing through the second side wall 4 having a direction of main development (e.g., the width) with respect to the remaining two sizes (e.g. height and depth).

[0128] As shown by the synoptic view in Figures 1-8, the lid 7 is jointed, in particular hinged, to the first side wall 3 to rotate about a rotation axis A. Specifically, the lid 7 is configured to switch between the open position P0 and the closed position P1 by means of a rotation about the rotation axis A. Preferably, the lid 7 is a substantially planar element having a rigid structure. In other terms, the lid 7 is a substantially two-dimensional element.

[0129] The lid 7 extends at least between a first edge 7A contiguous or adjacent to the first side wall 3 and a second edge 7B overlapping the second side wall 4. Specifically, the first edge 7A represents a portion connecting the lid to the first side wall 3, while the second edge 7B represents a free end of the lid. In particular, the first edge 7A coincides with the rotation axis A. In other terms, the first edge 7A acts as hinge for the lid 7, in movements between the open position P0 and the closed position P1.

[0130] According to what is shown, the second edge 7B is configured to define at least one flap 71, 72, 73. Each flap defined by the second edge 7B results insertable in a related slot 41, 42, 43 in the second side wall 4 to maintain, in particular stably maintain, the lid 7 in the closed position P1. Specifically, the insertion of the flap, or of flaps, in the related slot, or in the related slots, acts as locking mechanism of the lid 7 in the closed position P1.

[0131] As can be seen from the different embodiments of lid 7 shown in Figures 9a-f, the second edge 7B comprises a first stretch T1 that develops between a first point and a second point, wherein the first point and the second point are two distinct points of the second edge 7B in correspondence with a flap 71, 72, 73. Specifically, the first stretch T1 has a conformation such that, defining a function of the type y = f(x), wherein: x corresponds to the distance, measured along a development of the second edge 7B, of a generic point of the first stretch from the first point; and y corresponds to the distance of such generic point from the rotation axis A; said function y = f(x) is a strictly monotonic function.

[0132] In other terms, the first stretch T1 is a locus of the points of the second edge 7B wherein the distance increases or decreases in a strictly monotonic way going from the first point to the second point, wherein the first point and the second point represent two ending points of the first stretch T1.

[0133] Preferably, the function y = f(x) is a continuous function, i.e. the function of distance from the rotation axis A defined on points of the first stretch is a continuous function. Consequently, the first stretch T1 does not have sudden changes of distance from the rotation axis. In other words, the first derivative of the function y = f(x) on the first stretch T1 is always definable and does not assume infinite, or substantially infinite, values.

[0134] Still preferably, the function y = f(x) is a strictly increasing monotonic function. In particular, the first stretch T1 has a distance from the rotation axis A that increases, preferably in a gradual and progressive way, from the first point to the second point.

[0135] The first stretch T1 has advantageously a profile defining a mathematical function, the first derivative of such mathematical function having finite values along the entire first stretch T1.

[0136] The mathematical function defined by the profile of the first stretch T2 is advantageously such that, considering an intermediate point placed in correspondence with the half of the first stretch T1, the difference (p) between the distance between such intermediate point and the first edge 7A and the distance between the first point and the first edge 7A is greater than the difference (s) between the distance between the second point and the first edge 7A and the distance between such intermediate point and the first edge 7A.

[0137] In an implementation form of the present invention, the radius of curvature of the first stretch T1 keeps substantially constant along the entire first stretch T1, so that the first stretch T1 described an arc of a circumference. In a further implementation form of the present invention, the radius of curvature of the first stretch T1 advantageously increases continuously by moving along the first stretch T1 from the first point toward the second point.

[0138] According to the embodiments of the container 1, in particular of the lid 7, the first stretch T1 can comprise at least one curved portion (e.g., it can coincide with an arc of a circumference or comprise at least two curved portions having radii of curvature that differ from one another) and / or at least one straight portion (e.g. can coincide with a straight segment or comprise a plurality of straight portions having angles different from each other with respect to the rotation axis A). Preferably, the inclination of each straight portion of the first stretch T1 with respect to the rotation axis A is different from 90°, more preferably less than 45° and greater than 135°, even more preferably less than 30°, or greater than 150°.

[0139] During the use of container 1, the first stretch T1 of the second edge 7B is configured to function, during a transition of the lid 7 from the open position P0 to the closed position P1, as divaricating element of the second side wall 4 with respect to the first side wall 3, to enable the insertion of the flap 71, 72, 73 into the corresponding slot 41; 42, 43. In fact, as appears from the attached figures, due to the presence of the flap or flaps, the lid 7 has a planar extent greater than the opening 11. Specifically, in the closed position P1 (see figures 3, 4, 7 e 8), each flap 71, 72, 73 with which is provided the lid 7 emerges from the second side wall 4 through a related slot 41, 42, 43. Therefore, during said transition between the open position P0 and the closed position P1, the lid 7 results in a condition of interference, wherein at least one flap 71, 72, 73 contacts the second side wall 4, elastically deforming it. In particular, in the condition of interference reached in the passage between the open position P0 and the closed position P1, each flap 71, 72, 73 pushes against the top of the second side wall 4, by divaricating it with respect to the first side wall 3.

[0140] According to the embodiment of the container 1, the lid 7 can comprise a different number of flaps 71, 72, 73 and, consequently, the second side wall 4 can comprise a different number of slots 41, 42, 43.

[0141] In an embodiment, shown in figures 1-4, the lid 7 comprises a sole flap 71 and the second side wall 4 comprises a sole slot 41.

[0142] In another embodiment, shown in figures 5-8, the lid 7 comprises two or more flaps, in the present case two flaps 72, 73, distance from each other by a stabilizing segment D1. Specularly, the second side wall 4 comprises two or more slots, in the present case two slots 42, 43 distinct and distanced from each other. In such embodiment, each slot 42, 43 is configured to accommodate a related flap 71, 72 when the lid 7 is in the closed position P1, while the stabilizing segment D1 is configured to contact and abut against the second side wall 4 in the area interposed between the two slots 42, 43. Preferably, as shown in figures 5 to 7, the second side wall 4 has a structural weakening, specifically an incision or a cut, made in an area between the two slots 42, 43. In the embodiment shown in figures 5-8 and 11, the second wall 4 comprises an incision or a cut that is parallel to the horizontal plane X-Y and that is made starting from the lower edge of the slot 42, until the lower edge of the slot 43.

[0143] Advantageously, the cut is formed in the second side wall 4 of the container 1 at a portion placed as separation between the two slots 42, 43, i.e. of a portion interposed between slots 42, 43. Advantageously, the cut is substantially parallel to the bottom wall 2 of container 1. Advantageously, the cut is located substantially at the same height as a lower edge of at least one between the slots 42, 43. Advantageously, the cut develops seamlessly between the slots 42, 43 (i.e. in other terms, that the cut can develop from a point belonging to an edge of the first slot 42 until reaching a point belonging to an edge of the slot 43).

[0144] Preferably, as still shown in the different embodiments of figures 9a-f, the second edge 7B comprises a second stretch T2 distinct from the first stretch T1 that develops between a third point and a fourth point. Specifically, the third point and the fourth point are two distinct points of the second edge 7B in correspondence with a flap 71, 72, 73 such that the distance, measured along the development of the second edge, of the third point from the first point of the first stretch T1 is greater than the distance of the fourth point from the same first point. In other terms, along the development of the second edge 7B, the fourth point is closer to the first point of the first stretch T1 with respect to the third point. In a way substantially analogous to the first stretch T1, the second stretch T2 has a conformation such that, defining a function of the type a = f(b), wherein: a corresponds to the distance, measured along the second edge 7B, of a generic point of the second edge from the third point; and b corresponds to the distance of such generic point of the second stretch from the rotation axis A; said function a = f(b) is a strictly monotonic function.

[0145] In other terms, the second stretch T2 is another place of the points of the second edge 7B wherein the distance increases or decreases in a strictly monotonic way going from the third point to the second point, wherein the third point and the fourth point represent two ending points of the second stretch T2.

[0146] Preferably, the function a = f(b) is a continuous function, i.e. the function of distance from the rotation axis A defined on points of the second stretch T2 is a continuous function. Consequently, the second stretch T2 does not have sudden changes of distance from the rotation axis. In other words, the first derivative of the function a = f(b) on the second stretch T2 is always definable and does not assume infinite, or substantially infinite, values.

[0147] Still preferably, the function a = f(b) is a strictly increasing monotonic function. In particular, the second stretch T2 has a distance from the rotation axis A that increases, preferably in a gradual and progressive way, from the third point to the fourth point.

[0148] In an advantageous implementation form of the present invention, the second stretch T2 describes an arc of a circumference having the same curvature of the arc of a circumference described by the first stretch T1 or a tighter curvature with respect to the first stretch T1. However, the configuration of the second stretch T2 is not to be intended limited thereto. In fact, according to the embodiments of the container 1, in particular of the lid 7, the second stretch T2 can comprise at least one curved portion (e.g., it can coincide with an arc of a circumference or comprise at least two curved portions having radii of curvature that differ from one another) and / or at least one straight portion (e.g., can coincide with a straight segment or comprise a plurality of straight portions having angles different from each other with respect to the rotation axis A). Preferably, the inclination of each straight portion of the second stretch T2 with respect to the rotation axis A is different from 90°, more preferably less than 45° and greater than 135°, even more preferably less than 30°, or greater than 150°.

[0149] Preferably, as shown in figures 9a-f, the first stretch T1 and the second stretch T2 are symmetric to each other, preferably with respect to an axis perpendicular to the rotation axis A.

[0150] In the embodiments shown in the attached figures, each flap 71, 72, 73 of the lid 7 comprises both a first stretch T1 and a second stretch T2.

[0151] In a first embodiment, the second point of the first stretch T1 coincides with the fourth point of the second stretch T2. In such embodiment, the first stretch T1 and the second stretch T2 are continuous with each other along the development of the second edge 7B.

[0152] In a first embodiment, the second point of the first stretch T1 is distinct from the fourth point of the second stretch T2. In such embodiment, the first stretch T1 and the second stretch T2 are separated from each other by at least one further stretch T3 of the second edge 7B. Preferably, such further stretch T3 is parallel to the rotation axis A.

[0153] The further stretch T3 has advantageously a profile that defines a further mathematical function. Such further mathematical function is a mathematical function different from the mathematical function defined by the first stretch T1. The first derivative of the mathematical function of the first stretch T1 in correspondence with the second point coincides with the first derivative of the mathematical function of the further stretch T3, still in correspondence with the second point.

[0154] In the embodiments shown in the attached figures, in particular in figures 9a-f, the entire second edge 7B of the lid 7 does not have discontinuities. Specifically, the second edge 7B does not have sudden changes of distance from the rotation axis A. In other terms, the second edge 7B has a gradual and continuous development along its entire development. Preferably, then, the second edge 7B does not have stretches substantially perpendicular to the rotation axis A.

[0155] Still preferably, the distance between the second edge 7B and the rotation axis A gradually varies substantially along the entire development of the second edge. Specifically, the distance value between the second edge 7B and the rotation axis A does not have discontinuities or abrupt value changes.

[0156] Preferably, the lid 7 comprises a closure surface 70 adapted to cover the opening 11 in the closed position P1. As shown in the attached figures, each flap extends continuously from the closure surface 70. In particular, each flap 71, 72, 73 extends in a gradual and progressive way from the closure surface 70. In other terms, each flap 71, 72, 73 emerges from the closure surface 70 in a continuous way, i.e. gradual and without surges. Preferably, the closure surface 70 and the flap, or flaps, 71, 72, 73, lie substantially on a same plane. The closure surface 70 and the flap, or flaps, 71, 72, 73 are substantially integral with one another, i.e. are not movable relative to each other. In this sense, each flap 71, 72, 73 is substantially fixed in position, i.e. not movable, related to the closure surface 70 from which emerges.

[0157] As shown in the attached figures, each flap 71, 72, 73 is connected to the closure surface. Specifically, the first point of each first stretch T1 represents a connection point between the related flap and the closure surface 70. Analogously, the third point of each second stretch T2 represents a connection point between the related flap and the closure surface 70. Substantially, the first stretch T1 and the second stretch T2 represent two end connection positions of the related flap.

[0158] According to a preferred embodiment, the lid 7 has a substantially symmetric shape with respect to a symmetry axis B. In the shown embodiments, the symmetry axis B is perpendicular to the first edge 7A and / or to the rotation axis A.

[0159] With reference to figures 9a-f, hereinafter are described in an absolutely explicative but non-limiting way, some examples among the possible implementation forms of the lid 7, and in particular of the second edge 7B. In figure 9a, the lid 7 has a sole flap 71 having a partially circular conformation, wherein the first stretch T1 and the second stretch T2 are continuous with each other to describe overall an arc of a circumference. In particular, the first stretch T1 and the second stretch T2 are curved portions of the second edge 7B having the same radius of curvature. In particular, the first stretch T1 and the second stretch T2 are symmetrical with respect to the symmetry axis B.

[0160] In figure 9b, the lid 7 has a sole flap 71 having a partially curved and partially straight conformation, wherein the first stretch T1 and the second stretch T2 are continuous with each other. The first stretch T1 and the second stretch T2 are specifically arranged symmetrically with respect to the symmetry axis B and comprise an external straight portion that develops according to a predetermined inclination angle and a central curved portion, the latter describing in particular an arc of a circumference. Even more in particular, each of the lines tangent to such arc of a circumference in correspondence with the transition points with the external straight portions has an inclination that coincides with the inclination of the external straight portions.

[0161] In figure 9c, the lid 7 has a sole flap 71, having still partially curved and partially straight conformation, wherein a further stretch T3 parallel to the first edge 7A (or, equivalently, parallel to the rotation axis A) is provided as connection between the first stretch T1 and the second stretch T2. The first stretch T1 and the second stretch T2 are specifically arranged symmetrically with respect to the symmetry axis B and comprise a respective external straight portion and a respective central curved portion.

[0162] In figure 9d, the lid 7 has a sole flap 71, having still partially curved and partially straight conformation, wherein the first stretch T1 and the second stretch T2 are separated by a further stretch T3 parallel to the first edge 7A (or, equivalently, parallel to the rotation axis A) is provided as connection between the first stretch T1 and the second stretch T2. In particular, the first stretch T1 and the second stretch T2 are arranged symmetrically with respect to the symmetry axis B and comprise curved portions having the same radius of curvature. Even more in particular, each of the lines tangent to the first stretch T1 and to the second stretch T2 in correspondence with the respective transition points with the further stretch T3 is parallel to the first edge 7A (or, equivalently, parallel to the rotation axis A).

[0163] In figure 9e, the lid 7 has two flaps 72, 73 arranged symmetrically with respect to the symmetry axis B and separated by a stabilizing segment D1 parallel to the rotation axis A. Each flap has a curved conformation in sections, in which the first stretch T1 and the second stretch T2 are continuous with each other.

[0164] In particular, the first stretch T1 and the second stretch T2 are constituted by curved portions having different radii of curvature. Specifically, the first stretch T1 has a radius of curvature greater than the second stretch T2. The tighter curvature of the second edge 7B in correspondence with the second stretch T2 of each one between the flaps 72, 73 is particularly advantageous, since it allows a stable accommodation of the flaps 72, 73 in the respective slots 42, 43.

[0165] In figure 9f, the lid 7 has three flaps 71, 72, 73 arranged symmetrically with respect to the symmetry axis B and separated by the two stabilizing segments D1, D2 parallel to the rotation axis A. Specifically, the lid 7 has two external flaps 72, 73 having conformation similar to the flaps of the embodiment shown in figure 9e and a central flap 71 having conformation similar to the flap of the embodiment shown in figure 9d.

[0166] Preferably, in order to facilitate the rotation of the lid 7 about the rotation axis A, the first edge 7A has at least one structural weakening in correspondence with the rotation axis A. In the embodiments of the attached figures, as shown in figures 2, 4, 6 and 8, such structural weakening comprises at least one slit provided substantially in correspondence with the first edge 7A i.e. in correspondence with a zone of connection between the first side wall 3 and the lid 7.

[0167] Still preferably, the first edge 7A has an area processed with a creasing technique in correspondence with the rotation axis A, i.e. in the zone of continuity between the lid 7 and the first side wall 3. Specifically, such zone of creasing is configured to facilitate the rotation of the lid 7 with respect to the first side wall 3 about the rotation axis A and increase the strength of the hinge about which the lid rotates.

[0168] Still preferably, the plurality of side walls 3, 4, 5, 6 and / or the lid 7 comprise at least one window 30, 74 configured to allow an inspection of the storage compartment 10. In the embodiments shown in figures 1-8, the container 1 comprises two windows, specifically a first window 30 provided in the first side wall 3 and a second window 74 provided in the closure surface 70 of the lid 7. Each window 30, 74 allows one to observe inside the storage compartment 10 and then the food products stored herein, also with the lid 7 in the closed position P1. In a preferred embodiment, each window 30, 74 is configured to be at least partially obstructed by a layer of transparent material 31, 75, preferably a plastic film, even more preferably a cellophane film. Optionally, said layer of transparent material 31, 75 comprises at least one passage 76, or hole, configured to allow an air exchange between the storage compartment 10 and the external environment.

[0169] A method of closing the container 1, previously described, is now described, with reference to figures 10 and 11. Specifically, the method of closing results configured to perform a transition of the lid 7 from the open position P0 to the closed position P1. Such method of closing comprises the following steps: disposing the container 1 with the lid 7 in the open position P0; moving the lid 7, by rotating about the rotation axis A, towards the closed position P1 until contacting the second side wall 4; pressing the lid 7 toward the closed position P1 by applying a pressure toward the bottom wall 2 substantially at the second edge 7B and progressively varying a point of application of such pressure along a direction which goes from the first point to the second point of the first stretch T1; inserting the at least one flap 71, 72, 73 into the corresponding slot 41, 42, 43 and bringing the lid 7 into the closed position P1.

[0170] In particular, the step of pressing the lid 7 causes a concurrent divarication of the second side wall 4 with respect to the first side wall 3 when the pressure is applied at substantially the first stretch T1 varying the point of application from the first point to the second point. Therefore, the step of pressing the lid 7 toward the closed position P1 causes the lid to enter in the condition of interference with the second side wall 4. Specifically, the divarication of the second side wall 4 with respect to the first side wall 3, causes a partial elastic deformation of the container 1 by means of the interference between the flap, or flaps, 71, 72, 73 and the second side wall 4. The subsequent step of inserting the at least one flap 71, 72, 73 in the corresponding slot 41, 42, 43 causes the release of the second side wall 4.

[0171] Preferably, the step of pressing the lid 7 toward the closed position P1 is performed along an entire development of the second edge 7B in a sense that goes from the first point to the second point of the first stretch T1. Specifically, the step of pressing the lid 7 provides for varying the point of application of the pressure starting substantially from an end point of the second edge 7B and ending substantially in the opposite end point of the same second edge, acting then in correspondence with the first stretch T1 in a sense that goes from the first point to the second point of the first stretch T1.

[0172] Still preferably, the step of pressing the lid 7 towards the closed position P1 provides for exerting a pressure whose point of application progressively varies along a direction parallel to the rotation axis A at substantially the second edge 7B.

[0173] With reference to figure 10, an illustrative implementation, of manual type, of the method of closing previously shown is now described. According to what is shown, the container 1 is provided with the lid 7 in the open position P0, i.e. with the opening 11 at least partially free to allow an access to the storage compartment.

[0174] Subsequently, the lid 7 is rotated about the rotation axis A until contacting the second side wall 4, in particular a top profile of the second side wall 4, as indicated by the arrow M1 in figure 10.

[0175] Afterwards, to overcome the resistance of the second side wall 4 and allow the insertion of the two flaps defined by the second profile 7B in the corresponding two slots in the second side wall, the lid 7 is pressed toward the closed position P1. Specifically, differently from the traditional methods wherein it is applied a sole uniform and constant pressure toward the bottom surface 2 substantially on the entire development of the free edge of the lid, in the method of closing according to the present description the pressure is exerted in a localized way at substantially the second edge 7B, progressively varying the point of application of such pressure along a direction that goes from the first point to the second point of the first stretch T1. Substantially, the pressure is applied only locally and the point of application is modified in a progressive way in a direction which goes from the first point to the second point of the first stretch T1 as clearly indicated by the arrow M2 in figure 10. In the shown embodiment, due to the symmetrical shape of the lid 7, the pressure can be applied both from left to right in the axonometric view of figure 10, or in opposite sense (i.e., from right to left). Preferably, the pressure is applied by varying the point of application along the entire development of the second edge 7B, substantially starting from an end point of the second edge 7B and substantially ending in the opposite end point of the same second edge.

[0176] When the pressure is applied in correspondence with the first stretch T1, by varying the point of application from the first point to the second point, the second side wall 4 is divaricated with respect to the first side wall 3. Specifically, the conformation of the first stretch T1, the distance thereof progressively increases from the first point to the second point, causes the gradual moving away of the second side wall 4 from the first side wall 3 so that it is possible to create room for the insertion of the related flap in the storage compartment 10 through the opening 11. In this situation, the lid 7 is in the condition of interference with the second edge 7B that presses against the second side wall 4. Once the height in which is provided the related slot is reached, the flap passes through such slot and the second side wall is released. Therefore, the lid 7 reaches the closed position P1. The divarication of the second side wall 4 with respect to the first side wall 3 causes an elastic deformation of the container 1 shown by the arrow M in figure 10.

[0177] It should be noted that the method of closing previously described finds particular application in a packing process of food products, in particular fruit and vegetable products. Specifically, the packing process comprises the same steps of the method of closing with the addition of a further step of placing a determined quantity of food products in the storage compartment, the performing thereof is subsequent to the step of placing the container 1 with the lid 7 in the open position P0 and previous to the step of moving the lid 7, by rotating it about the rotation axis A, towards the closed position P1 until contacting the second side wall 4.

[0178] The packing process finds particular application in the context of the automated packing systems. With reference to figure 11, an automated packing system 200 of food products, in particular fruit and vegetable products, particularly suitable for performing of the above-mentioned packing process, is now described.

[0179] According to what is shown in figure 11, the packing system 200 comprises a conveyor belt 201, or an equivalent motorized or passive guide. Specifically, the conveyor belt 201 is configured to receive at least one container 1, preferably a plurality of containers 1, and to move each container 1 along a path of advancement F.

[0180] Firstly, the packing system 200 comprises a feeding station 202, operatively associated to the conveyor belt 201. In particular, the feeding station 202 is configured to deposit at least one container 1 preferably a plurality of containers, on the conveyor belt. Preferably, the feeding station 202 is configured to deposit each container 1 on the conveyor belt 201 with the lid 7 already in open position P0 or comprises an opening mechanism suitable for bringing each lid 7 deposited on the conveyor belt 201 in open position P0. Downstream of the feeding station 202 along the path of advancement F, the packing system 200 comprises a loading station 203 of food products, too operatively associated to the conveyor belt 201. Specifically, the loading station 203 is configured to deposit a predefined quantity of food products, for example a predefined weight of food products, in the storage compartment 10 of each container 1 transiting on the conveyor belt 201. In figure 11, is shown in an illustrative way an embodiment of the packing system 200 wherein the loading station 203 deposits a determined quantity of blueberries in each container 1 transiting on the conveyor belt 201.

[0181] Downstream of the loading station 203 along the path of advancement F, the packing system 200 comprises a closing station 204, operatively associated to the conveyor belt 201. In detail, the closing station 204 is configured to bring the lid 7 in the closed position P1.

[0182] As shown in figure 11, the closing station 204 comprises a first closing mechanism 205 configured to move the lid toward the position P1 closed until contacting the second side wall 4 in particular a top profile of the second side wall 4. In the shown embodiment, the first closing mechanism 205 comprises a first shaped bar having a conformation such as to contact the lid 7 starting from the first edge 7A progressively moving toward the second edge 7B. Furthermore, the closing station 204 comprises a second closing mechanism 206, positioned at least partially downstream of the first closing mechanism 205. In detail, the second closing mechanism 206 is configured to press the lid 7 toward the closed position P1 by applying a pressure toward the bottom surface 2 at substantially the second edge 7B. Due to the movement of each container 1 along the path of advancement F, the point of application of the pressure is varied along a direction which goes from the first point to the second point of the first stretch, thus causing, at first, the divarication of the second side wall 4 with respect to the first side wall 3 and, subsequently, the insertion of the flap, or flaps, in the respective slot, or in the respective slots. In the shown embodiment, the second closing mechanism 206 comprises a second shaped bar that predominantly develops in correspondence with the second edge 7B of containers 1 transiting on the conveyor belt 201. Preferably, the second shaped bar comprises at least one inclined stretch with height that progressively decreases until reaching the height wherein is provided the slot, or the plurality of slots, in the second side wall 4. Therefore, the action of the second shaped bar is configured, firstly, to divaricate the second side wall 4 with respect to the first side wall 3 and, subsequently, to insert each flap 71, 72, 73 in the respective slot 41, 42, 43 thus bringing the lid 7 in the closed position P1.ADVANTAGES OF THE INVENTION

[0183] The present invention involves significant technical effects with respect to the state of the art.

[0184] In first place, the container 1 according to the present invention has a particularly facilitated closing operation with respect to the containers of known type for food products, in particular for fruit and vegetable products. In fact, the presence of the first stretch T1 allows a reduction of the resistance generated by the sliding contact of the flap against the side wall wherein the related slot is provided. Specifically, the presence of the first stretch T1 allows to facilitate the operations of divarication of the second side wall 4 with respect to the first side wall 3 such as to allow the access of each flap 71, 72, 73 in the related slot 41, 42, 43. In fact, the gradual development of the first stretch T1 allows to divaricate in a facilitating and progressive way the second side wall 4 with respect to the first side wall 3, reducing the resistance caused by the passage of the lid in the condition of interference with the side walls.

[0185] In particular, the container 1 allows to significantly reduce the force necessary to reach the closed position of the lid 7 with respect to the known solutions in the field.

[0186] Additionally, the container 1 minimizes the risk of defective closures and / or breakages, for example of one of flaps 71, 72, 73, resulting from the performing of the operations of closure of the lid with respect to the solutions known in the art.

[0187] In addition, the container 1 is well suitable for both being used in the context of a packing system 200 of automated type and being implemented in a manual way by a user, such as for example the packager or end consumer. The container 1 has, furthermore, a particularly competitive production cost and comparable to the one of the solutions known in the field.

[0188] The container 1 offers a simple, solid and durable structure. In particular, the container 1 allows to replicate the operations of opening and closing many times, without the risk of compromising the solidity of the structure of the container itself.

[0189] The container 1 ensures a method of closing and a packing process that are easily implementable. In particular, the method of closing and the packing process result reproducible with regularity in an optimal way, so as to allow its implementation both manually and in the context of an automated packing system.

[0190] It is underlined finally that, even if the present invention has been described with particular reference to a container predominantly made of cardboard, substantially the same teachings can be applied to a container of analogous typology made of plastic.

Claims

1. Container (1) for food products, in particular for fruit and vegetable products, said container (1) comprising: - a bottom wall (2); - a plurality of side walls (3, 4, 5, 6) extending from said bottom wall (2), said plurality of side walls (3, 4, 5, 6) and said bottom wall (2) being configured to jointly define a storage compartment (10) having an opening (11) opposite to said bottom wall (2), said storage compartment (10) being capable of accommodating said food products; and - a lid (7) selectively movable at least between an open position (P0), wherein an access to said storage compartment (10) through said opening (11) is allowed or facilitated, and a closed position (P1), wherein an access to said storage compartment (10) is prevented or hampered, said lid (7) being configured to at least partially obstruct said opening (11) in said closed position (P1); wherein said plurality of side walls (3, 4, 5, 6) comprises at least a first side wall (3) and a second side wall (4), said first side wall (3) and said second side wall (4) being specifically opposite walls of said container (1); wherein said lid (7) is jointed, in particular hinged, to said first side wall (3), in particular to rotate about a rotation axis (A); wherein at least one slot (41; 42, 43), in particular at least one slot (41; 42, 43) substantially parallel to said bottom wall (2), is provided in said second side wall (4); wherein said lid (7) extends at least between a first edge (7A) contiguous or adjacent to said first side wall (3) and a second edge (7B) overlapping said second side wall (4), said second edge (7B) being configured to define at least one flap (71; 72, 73) insertable into said at least one slot (41; 42, 43) to maintain, in particular to stably maintain, said lid (7) in said closed position (P1), wherein said second edge (7B) of said lid (7) comprises at least a first stretch (T1) extending between a first point and a second point, said first point and said second point being two distinct points of said second edge (7B), said first point and said second point being in particular arranged in correspondence with said at least one flap (71; 72, 73); characterized in that, defining a function of the type y = f(x), wherein: - x corresponds to the distance, measured along a development of said second edge (7B), of a generic point of said first stretch (T1) from said first point; and - y corresponds to the distance of said generic point of said first stretch (T1) from said rotation axis (A) and / or to the distance of said generic point of said first stretch (T1) from said first edge (7A); said function y = f(x) is a strictly monotonic function.

2. Container (1) according to claim 1, wherein said container (1) is made of paper material, preferably cardboard, more preferably corrugated cardboard; and / or wherein said lid (7) is a substantially planar element having a rigid structure; and / or wherein said first stretch (T1) of said second edge (7B) is configured to function, during a transition of said lid (7) from said open position (P0) to said closed position (P1), as divaricating element for said second side wall (4) with respect to said first side wall (3), to enable or facilitate an insertion of said at least one flap (71; 72, 73) into said at least one slot (41; 42, 43); and / or wherein said function y = f(x) is a continuous function; and / or wherein said function y = f(x) is a strictly increasing monotonic function.

3. Container (1) according to claim 1 or 2, wherein said second edge (7B) does not have discontinuities; and / or wherein said second edge (7B) has a gradual and continuous development; and / or wherein said second edge (7B) does not have stretches substantially perpendicular to said rotation axis (A) or to said first edge (7A); and / or wherein said lid (7) comprises a closure surface (70), adapted to cover said opening (11) in said closed position (P1), said at least one flap (71; 72, 73) extending continuously from said closure surface (70); and / or wherein said closure surface (70) and said at least one flap (71; 72, 73) are integral with one another; and / or wherein said at least one flap (71; 72, 73) is connected to said closure surface (70); and / or wherein said first point represents a connection point between said at least one flap (71; 72, 73) and said closure surface (70).

4. Container (1) according to any of the preceding claims, wherein said first stretch (T1) is an at least partially curved stretch; and / or wherein said first stretch (T1) comprises at least two curved portions having radii of curvature that differ from one another; and / or wherein said first stretch (T1) is an at least partially straight stretch; and / or wherein said first stretch (T1) has an inclination relative to said rotation axis (A) or relative to said first edge (7A) different from 90°, preferably less than 45° or greater than 135°, more preferably less than 30° and greater than 150°. and / or wherein said first stretch (T1) comprises a plurality of straight portions having angles relative to said rotation axis (A) or relative to said first edge (7A) that differ from one another.

5. Container (1) according to any of the preceding claims, wherein said second edge (7B) of said lid (7) comprises a second stretch (T2), distinct from said first stretch (T1), extending between a third point and a fourth point, said third point and said fourth point being two distinct points of said second edge (7B), said third point and said fourth point being in particular arranged in correspondence with said at least one flap (71; 72, 73); wherein the distance, measured along said second edge (7B), of said third point from said first point is greater than the distance of said fourth point from said first point; wherein, defining a function of the type a = f(b), wherein: - a corresponds to the distance, measured along said second edge (7B), of a generic point of said second stretch from said third point; and - b corresponds to the distance of said generic point of said second stretch (T2) from said rotation axis (A) and / or to the distance of said generic point of said first stretch (T1) from said first edge (7A), said function a = f(b) is a strictly monotonic function.

6. Container (1) according to the preceding claim, wherein said function a = f(b) is a continuous function; and / or said function a = f(b) is a strictly increasing monotonic function; and / or wherein said first stretch (T1) and said second stretch (T2) are symmetric to each other, preferably with respect to an axis perpendicular to said rotation axis (A) and / or to said first edge (7A), said second edge (7B) being in particular symmetric as a whole; and / or wherein each flap (71; 72, 73) of said lid (7) comprises both said first stretch (T1) and said second stretch (T2); and / or wherein said second point coincides with said fourth point, said first stretch (T1) and said second stretch (T2) being continuous or contiguous with each other along a development of said second edge (7B); and / or wherein said second point is distinct from said fourth point, said first stretch (T1) and said second stretch (T2) being separated by at least one further stretch (T3) of said second edge (7B), preferably parallel to said rotation axis (A) or to said first edge (7A); and / or wherein said first stretch (T1) has a profile defining a mathematical function, the first derivative of said mathematical function having finite values along the entire length of said first stretch (T1); and / or wherein said further stretch (T3) has a profile defining an additional mathematical function, said additional mathematical function being a mathematical function different from the mathematical function defined by said first stretch (T1), and wherein the first derivative of said mathematical function of said first stretch (T1) at said second point coincides with the first derivative of said mathematical function of said further stretch (T3) at said second point; and / or wherein said plurality of side walls (3, 4, 5, 6) comprises at least a third side wall (5), arranged to at least partially connect said first side wall (3) and said second side wall (4); and / or wherein said plurality of side walls (3, 4, 5, 6) comprises at least a fourth side wall (6) arranged to at least partially connect said first side wall (3) and said second side wall (4); and / or wherein said third side wall (5) and said fourth side wall (6) are opposite to each other; and / or wherein said bottom wall (2) extends in a horizontal plane (X-Y), said plurality of side walls (3, 4, 5, 6) extending from said bottom wall (2) predominantly along a vertical axis (Z) orthogonal to said horizontal plane (X-Y); and / or wherein, in said closed position (P1), said lid (7) lies in a plane substantially parallel to said horizontal plane (X-Y); and / or wherein said second side wall (4) has a vertical development along said vertical axis (Z) greater than the remaining side walls of said plurality of side walls (3, 4, 5, 6); and / or wherein said bottom wall (2) has a substantially quadrangular shape, preferably rectangular, said plurality of side walls (3, 4, 5, 6) comprising four side walls; and / or wherein said first edge (7A) and said second edge (7B) are opposite to each other; and / or wherein the extent of said opening (11) is greater than the extent of said bottom wall (2).

7. Container (1) according to any of the preceding claims, wherein said first edge (7A) represents a zone of continuity between said lid (7) and said first side wall (3); and / or wherein said first edge (7A) has at least one structural weakening in correspondence with said rotation axis (A); and / or wherein said first edge (7A) has an area processed using a creasing technique; and / or wherein said lid (7) has a substantially symmetric shape with respect to a symmetry axis (B), said rotation axis (A) and said symmetry axis (B) being preferably perpendicular; and / or wherein said plurality of side walls (3, 4, 5, 6) and / or said lid (7) comprise at least one window (30, 74) configured to allow an inspection of said storage compartment (10); and / or wherein said at least one window (30, 74) is configured to be at least partially obstructed by a layer of transparent material (31, 75); and / or wherein said layer of transparent material (31, 75) comprises a plastic film, preferably a cellophane film; and / or wherein said layer of transparent material (31, 75) comprises at least one passage (76), or hole, configured to allow an air exchange between said storage compartment (10) and an external environment.

8. Container (1) according to any of the preceding claims, wherein, taking an intermediate point corresponding to the midpoint of said first stretch (T1) and considering: p as the difference between the distance from said intermediate point to said first edge (7A) and the distance from said first point to said first edge (7A) and s as the difference between the distance from said second point to said first edge (7A) and the distance from said intermediate point to said first edge (7A), it follows that p > s.

9. Container (1) according to any of the preceding claims, wherein said first stretch (T1) describes an arc of a circumference or wherein the radius of curvature of said first stretch (T1) increases continuously along said first stretch (T1) from said first point to said second point.

10. Container (1) according to any of the preceding claims, wherein said lid (7) comprises two or more flaps (72, 73) spaced apart by at least one stabilizing segment (D1, D2) of said second edge (7B), and said second side wall (4) comprises two or more slots (42, 43), wherein each slot of said two or more slots (42, 43) is configured to accommodate a respective flap among said two or more flaps (72, 73) in said closed position (P1) of said lid (7).

11. Container (1) according to the preceding claim, wherein said two or more slots (42, 43) are located substantially at the same distance from said bottom wall (2); and / or wherein said at least one stabilizing segment (D1, D2) is configured to contact said second side wall (4) in said closed position (P1) of said lid (7), in particular a corresponding separation portion of said second side wall (4) interposed between a first slot of said two or more slots (42, 43) and a second slot of said two or more slots (42, 43); and / or wherein at least one cut is made in said second side wall (4) in correspondence with said separation portion; and / or wherein said at least one cut is substantially parallel to said bottom wall (2); and / or wherein said at least one cut is located substantially at the same height as a lower edge of at least one of said two or more slots (42, 43); and / or wherein said at least one cut extends seamlessly between said first slot of said two or more slots (42, 43) and said second slot of said two or more slots (42, 43).

12. Method of closing a container (1) according to any of the preceding claims, said method comprising the following steps: - disposing said container (1) with said lid (7) in said open position (P0); - moving said lid (7) toward said closed position (P1) until contacting said second side wall (4); - pressing said lid (7) toward said closed position (P1) by applying a pressure toward said bottom wall (2) substantially at said second edge (7B) and progressively varying a point of application of said pressure along a direction which goes from said first point to said second point; - inserting said at least one flap (71; 72, 73) into said at least one slot (41; 42, 43) and bringing said lid (7) into said closed position (P1).

13. Method of closing according to the preceding claim, wherein said step of pressing said lid (7) toward said closed position (P1) is performed along an entire development of said second edge (7B); and / or wherein said step of pressing said lid (7) causes a concurrent divarication of said second side wall (4) with respect to said first side wall (3) when said pressure is applied substantially in correspondence with said first stretch (T1); and / or wherein said divarication of said second side wall (4) relative to said first side wall (3) causes an elastic deformation of said container (1) by means of an interference of said at least one flap (71; 72, 73) with said plurality of side walls (3, 4, 5, 6), in particular said second side wall (4).

14. Packing process for food products, in particular fruit and vegetable products, said packing process comprising the following steps: - providing a container (1) according to any of the preceding claims; - disposing said container (1) with said lid (7) in said open position (P0); - placing a predetermined quantity of said food products in said storage compartment (10); - moving said lid (7) toward said closed position (P1) until contacting said second side wall (4); - pressing said lid (7) toward said closed position (P1) by applying a pressure toward said bottom wall (2) substantially in correspondence with said second edge (7B) and progressively varying a point of application of said pressure along a direction which goes from said first point to said second point; - inserting said at least one flap (71; 72, 73) into said at least one slot (41; 42, 43) and bringing said lid (7) into said closed position (P1).

15. Automated packing system (200) for food products, in particular fruit and vegetable products, configured to perform in an automated manner the packing process according to the preceding claim, said system (200) comprising: - a conveyor belt (201), configured to receive at least one container (1), preferably a plurality of containers (1), and to move said at least one container along a path of advancement (F); - a feeding station (202), operatively associated with said conveyor belt (201), configured to deposit said at least one container (1) on said conveyor belt (201) and position said lid in an open position (P0); - a loading station (203) for said food products, operatively associated with said conveyor belt (201), configured to deposit a predefined quantity of said food products into said storage compartment (10); - a closing station (204) for said at least one container (1), operatively associated with said conveyor belt (201), configured to move said lid (7) into said closed position (P1); wherein said closing station (204) comprises: - a first closing mechanism (205) configured to move said lid (7) toward said closed position (P1) until contacting said second side wall (4); - a second closing mechanism (206) positioned at least partially downstream of said first closing mechanism (205) along said path of advancement (F), configured to press said lid (7) toward said closed position (P1) by applying a pressure toward said bottom wall (2) substantially in correspondence with said second edge (7B) and progressively varying a point of application of said pressure along a direction which goes from said first point to said second point, said second closing mechanism being configured to insert said at least one flap (71; 72, 73) into said at least one slot (41; 42, 43).

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