Packaging, process and apparatus for making the same

Abstract

A package for containing a product (P) comprises a support (1) having a base (2) configured for receiving the product (P), a peripheral flange (6) surrounding the base (2) and forming at least one gripping protrusion (22), and a closing film (10) engaged with at least a portion of the peripheral flange to define a containing compartment for the product. The support is formed of a plastic substrate having a first surface (1a) and a second surface (1b), wherein the second surface presents thermal bonding properties to the closing film different from the thermal bonding properties of the first surface to the same closing film. The gripping protrusion (22) comprises a first portion (22a) and a second portion (22b) arranged above the first portion, wherein the gripping protrusion is externally delimited by the second surface (1b) of the substrate. The gripping protrusion (22) further comprises a peripheral edge which is part of a radial outer perimetric contour (3) of the peripheral flange (6).

Description

Technical Field

[0001] This invention relates to packaging, particularly packaging for containing products such as food products. The invention also relates to a process and related equipment for manufacturing such packaging, which uses a support or tray designed to contain at least one product, and a plastic film that cooperates with the support or tray to seal the product into the packaging. This invention can be applied to vacuum packaging or controlled atmosphere packaging of various types of products. Background Technology

[0002] In the food packaging industry, packaging sealed with plastic film and equipped with a convenient opening system is known: the convenient opening system is designed to ensure that users can easily open the packaging and quickly remove the product from it.

[0003] The first example of a convenient package opening described in French patent application FR 3002209 A1 provides a tray having a generally rectangular shape and a plastic film welded to the outer edge of the tray. The tray and film include corresponding gripping portions. A first portion of the film gripping portion is liftable relative to the tray gripping portion below, while a second portion of the film gripping portion is attached to a reinforcing tab that is detachable from the tray: the second portion of the film gripping portion, together with the reinforcing tab, forms an opening portion that can be grasped by the user to open the package, while the tray gripping portion, on the other hand, is the portion that can be grasped by the user to hold the support when removing the film from the package.

[0004] The applicant has noted several drawbacks of the opening system in French patent application FR 3002209 A1: in particular, the system requires a relatively large amount of material to manufacture the packaging and significant changes to conventional pallet forming and packaging processes to simultaneously provide a seal for the packaging, adhesion between the second part of the film gripper and the reinforcing protrusion of the pallet, and separation between the first part of the film gripper and the pallet gripper. In other words, the complex design of the opening system negatively impacts production costs, manufacturing process complexity, and the overall dimensions of the packaging.

[0005] Document WO2019123382 relates to a package including a support having: a base configured to receive one or more products; a peripheral edge surrounding the base; and a removable portion extending away from the base as an extension of the peripheral edge. The package further includes: a closure film engaging with a portion of the peripheral edge and with the removable portion to define a receiving compartment for the products; and a gripping portion exposed from the peripheral edge. The removable portion is configured to separate from the support along with the film during opening of the package. When the package is closed, the closure film is coupled to the support to prevent access to the receiving compartment, and the removable portion is aligned with its extended peripheral edge. The removable portion also has a cavity presenting a concave surface facing the peripheral edge, at least in the closed state of the package. The gripping portion is configured to be within the cavity, at least in the closed state of the package. While this solution represents a significant improvement over the aforementioned French reference document, the applicant has discovered further ways to simplify the entire package, thereby providing an easy-to-manufacture package with convenient opening properties. Summary of the Invention

[0006] The purpose of this invention

[0007] The purpose of this invention is to overcome the shortcomings and / or limitations of the prior art.

[0008] The first object of the present invention is to provide a package having an effective and convenient opening system to allow users to open the package simply and quickly; in particular, the object of the present invention is to provide a package that provides users with a quick tactile or visual perception of the convenient opening system.

[0009] A further object of the present invention is to provide a package having a simple and cost-effective structure that also ensures convenient and stable handling of the package during opening.

[0010] A further objective is to provide a type of packaging that can be manufactured using simple and rapid online production without requiring costly modifications to standard packaging manufacturing plants (i.e., plants that produce packaging without convenient opening systems).

[0011] A further objective is to provide packaging designed to accelerate manufacturing operations and reduce manufacturing costs.

[0012] These and other objectives will become more apparent from the following description, and are essentially achieved by packaging, equipment for manufacturing the packaging, and related processes according to one or more of the appended claims and / or the following aspects.

[0013] Overview

[0014] In a first aspect, a package (100) is provided for containing at least one product (P), the package comprising:

[0015] At least one support member (1) includes:

[0016] ○ At least one base (2) that receives the at least one product (P).

[0017] ○ The outer flange (6) surrounds the base (2) and forms at least one gripping protrusion (22).

[0018] The support member (1) is formed of a substrate having a first surface (1a) and a second surface (1b) opposite to the first surface (1a); and

[0019] A sealing film (10) is engaged with at least a portion of the peripheral flange (6) and together with the support (1) defines a receiving compartment (5) for the product (P). The sealing film (10) is configured to separate at least partially from the support (1) during the step of opening the package (100) to allow access to the receiving compartment (5).

[0020] In the second aspect according to the first aspect, the substrate is a continuous plastic substrate, such as a continuous plastic foil or a continuous plastic web, which can then be appropriately cut and shaped to form a support (1).

[0021] In the third aspect according to any of the foregoing aspects, the gripping protrusion (22) includes at least a first portion (22a) and a second portion (22b), the second portion being positioned in an overlapping position above the first portion (22a).

[0022] In the fourth aspect according to any one of the first and second aspects, the gripping protrusion (22) includes at least a first portion (22a) and a second portion (22b), the second portion being placed in an overlapping position above the first portion (22a), wherein a portion of the first surface (1a) carried by the first portion (22a) faces a corresponding portion of the first surface (1a) carried by the second portion (22b), and wherein a portion of the second surface (1b) carried by the first portion (22a) and a portion of the second surface (1b) carried by the second portion (22b) form opposite outer sides of the gripping protrusion (22).

[0023] In the fifth aspect according to any of the foregoing aspects, the gripping protrusion (22) has a peripheral edge (22d) which is part of the radial outer perimeter (3) of the peripheral flange (6).

[0024] In the sixth aspect according to any of the foregoing aspects, the thermal bonding properties of the second surface (1b) to the sealing membrane (10) are different from the thermal bonding properties of the first surface (1a) to the same sealing membrane, and the second portion is connected, optionally thermally bonded to the first portion (22a).

[0025] In the seventh aspect according to any of the foregoing aspects, the outer edge (22d) of the gripping protrusion (22) is formed by overlapping the outer edges of the first part (22a) and the second part (22b).

[0026] In the eighth aspect according to any of the foregoing aspects, the packaging is configured such that, in the closed state, the sealing film (10) is airtightly joined, particularly thermally joined, to at least the annular engagement area (6a) of the peripheral flange (6) so as to airtightly seal the receiving compartment (5) and isolate it from the external environment outside the receiving compartment.

[0027] In the ninth aspect according to any of the foregoing aspects, the sealing film (10) is also thermally bonded to the first surface (1a) of the support that is not occupied by the product (P).

[0028] In the 10th aspect according to either of the two aspects mentioned above, the annular joint region (6a) surrounds and completely encloses the receiving compartment (5), and the annular joint region (6a) is part of the first surface (1a).

[0029] According to aspect 11 of any of the aspects from the 3rd to the preceding aspect, the second part (22b) is connected to the first part (22a) at the fold line (22c).

[0030] In accordance with the 12th aspect of the preceding aspect, the second part (22b) is folded over the first part (22a) around the fold line (22c).

[0031] In the 13th aspect according to either of the two aspects mentioned above, the outer edge (22d) of the gripping protrusion (22) and the perimeter (3) includes one side extending along the fold line (22c), optionally the straight side (22e').

[0032] In the 14th aspect according to any one of the three aspects mentioned above, the fold line (22c) extends from the outermost radial portion of the peripheral edge (22d) of the gripping protrusion (22) to the annular engagement region (6a).

[0033] In the 15th aspect according to any of the foregoing aspects, the first surface (1a) of the support (1) is configured to be heat-sealed to the sealing film (10) at a heat-bonding temperature included between 140°C and 240°C, while the second surface (1b) of the support (1) is configured not to be heat-sealed to the sealing film at the heat-bonding temperature.

[0034] In the 16th aspect according to any one of the foregoing aspects from 1 to 14, the first surface (1a) of the support (1) is configured to be heat-sealed to the sealing film (10) at a heat-bonding temperature included between 140°C and 240°C to provide a first welding force, while the second surface (1b) of the support (1) is configured to be heat-sealed to the sealing film at the heat-bonding temperature to provide a second welding force that is weaker than the first welding force (in particular, 50% or more weaker than the first welding force).

[0035] In the 17th aspect according to any one of the two preceding aspects, the continuous substrate comprises a multilayer structure having: at least one top layer film made of a material heat-sealed to the closing film (10) at the said heat-bonding temperature; and at least one bottom layer film made of a material not heat-sealed (or heat-sealed with a smaller welding force than the top layer film) to the closing film (10) at the said heat-bonding temperature.

[0036] In aspect 18 according to any of the foregoing aspects, the support (1) is substantially rectangular, square or triangular in shape.

[0037] In aspect 19 according to any of the foregoing aspects, the gripping protrusion (22) is arranged at the corner area of ​​the support (1).

[0038] In the 20th aspect according to the preceding aspect, the fold line (22c) extends to the tip of the corner region of the support (1), optionally with a rounded, blunt, or pointed tip.

[0039] In aspect 21 according to any of the foregoing aspects, the gripping protrusion (22) is an integral part of the peripheral flange (6) of the support member (1).

[0040] In aspect 22 according to any of the foregoing aspects, the packaging is configured such that in one / the packaging closed state, the sealing film (10) is not bonded (in particular not thermally bonded) to the outside of the gripping protrusion (22) and forms a flap (10c) which is configured to be grasped by the user to bring the packaging from the closed state to at least a partially open state, in which the sealing film (10) is at least partially separated from the support (1) to allow access to the receiving compartment (5).

[0041] In the 23rd aspect of the preceding aspect, in the packaged closed state, the flap (10c) extends above the gripping protrusion (22) and is radially outside one of the annular engagement regions (6a) of the membrane and the peripheral flange (6), wherein a portion of the annular engagement region (6a) is radially inserted between the flap (10c) and the receiving compartment (5).

[0042] In the 24th aspect according to either of the two aspects mentioned above, the wing (10c) has a portion that does not cover the gripping protrusion (22) and does not cover the flange (6), extends above the recess (20) in the perimeter (3) of the outer flange (6) and can be directly operated by the user.

[0043] In aspect 25 according to any one of the three aspects mentioned above, the sealing membrane (10) and the wing (10c) extend beyond the peripheral edge of the gripping protrusion (22) and beyond the perimeter (3) of the peripheral flange (6) only in correspondence with the recess (20).

[0044] In aspect 26 according to any one of the four aspects mentioned above, in the closed state of the package (100), the flap (10c) covers at least a major portion of the top surface of the gripping protrusion (22), for example, at least 60% or at least 70% or at least 80% of the top surface of the gripping protrusion. In a variant, in the closed state of the package (100), the flap (10c) covers the entire top surface of the gripping protrusion (22).

[0045] In aspect 27 of any of the three aspects mentioned above, in the closed state of the package (100), the flap (10c) covers at least a major portion of the recess (20), such as at least 60% or at least 70% or at least 80% or all of the recess (20).

[0046] In aspect 28 according to any of the aforementioned six aspects, the outer side (and especially the top surface) of the gripping protrusion (22) is not bonded to and directly faces the bottom surface of the wing (10c) of the closure membrane (10).

[0047] In aspect 29 according to any one of the seven aspects mentioned above, the sealing membrane (10) and the gripping protrusion (22) extend parallel to each other, and in particular, the flaps (10c) of the sealing membrane (10) and the gripping protrusion (22) extend parallel to each other.

[0048] In the 30th aspect according to any of the foregoing aspects, the first surface (1a) of the support (1) defines the inner side of the first portion (22a) and the second portion (22b) of the gripping protrusion (22), the inner side of the first portion (22a) facing directly towards the inner side of the second portion (22b) of the gripping protrusion (22).

[0049] In aspect 31 according to any of the foregoing aspects, the inner side of the first portion (22a) of the gripping protrusion (22) is joined, in particular thermally joined, to the inner side of the second portion (22b) of the gripping protrusion (22).

[0050] In aspect 32 according to one of the foregoing aspects, the inner side of the first portion (22a) of the gripping protrusion (22) is coplanar with the outer flange (6) of the support (1).

[0051] In aspect 33 according to any one of aspects from 11 to the preceding aspect, the fold line (22c) of the gripping protrusion (22) defines a section of the outer perimeter (3) of the peripheral flange, and when the package is in the package closed state, the main part of the extension of the fold line (22c) (in particular, at least 60% or at least 70% or at least 80% or at least 90% of the extension of the fold line) is covered by the flaps (10c) of the sealing film (10).

[0052] In aspect 34 according to any of the aspects from 11 to the preceding aspect, the fold line (22c) of the gripping protrusion (22) defines a section of the outer perimeter (3) of the peripheral flange, and when the packaging is in the package closed state, the entire extension of the fold line is covered by the flaps (10c) of the sealing film (10).

[0053] In aspect 35 according to any of the aspects from 11 to the preceding aspect, the fold line (22c) of the gripping protrusion (22) extends laterally to the immediate continuous portion of the outer periphery (3) of the support (1) flange (6).

[0054] In aspect 36 according to any of the aspects from 11 to the preceding aspect, the fold line (22c) of the gripping protrusion (22) extends in a direction transverse to the receiving compartment (5) of the package (100).

[0055] In aspect 37 of one of the foregoing aspects, the first part (22a) and the second part (22b) of the gripping protrusion (22) are identical overlapping parts that are in close contact with each other.

[0056] In aspect 38, according to any of the aspects from 11 to the preceding aspect, the fold line (22c) extends in a straight line between a first end and a second end, the first end being closer to the receiving compartment (5) than the second end.

[0057] In aspect 39 of the preceding aspect, the wing (10c) of the closure membrane (10) extends to and beyond the first end of the fold line (22c), and in particular, the wing (10c) covers the first end of the fold line (22c).

[0058] In aspect 40, according to either of the two aforementioned aspects, the flaps (10c) of the closure membrane (10) extend to and beyond the second end of the fold line (22c).

[0059] In aspect 41 according to any one of the three aspects mentioned above, the gripping protrusion is substantially triangular in shape, particularly having a square-triangular shape with right angles arranged at the first end of the fold line (22c).

[0060] In aspect 42 according to any of the foregoing aspects, the second part (22b) of the gripping protrusion is obtained by the following means:

[0061] A separation line (9) is formed on the outer flange (6), particularly a cutting line, and

[0062] The second part (22b) is folded onto the first part (22a) around the fold line (22c), the separation line (9) being transverse to, and in particular perpendicular to, the fold line (22c).

[0063] In the 43rd aspect of the preceding aspect, the second part (22b) of the gripping protrusion (22) is defined by the following: the separation edge (9a) formed by the separation line (9), the fold line (22c) and a portion of the outer perimeter (3) of the peripheral flange (6).

[0064] In aspect 44 according to either of the two aspects mentioned above, a cutout portion adjacent to the gripping protrusion (22) and having the shape of a second portion (22b) is formed on the peripheral flange (6), the cutout portion defining a recess (20) in the outer periphery (3) of the peripheral flange (6).

[0065] In accordance with aspect 45 of the preceding aspect, most or all of the cut-out portion extends below the wing (10c) while the package is in a closed state.

[0066] In aspect 46 according to any of the three aspects mentioned above, the separating edge (9a) of the second part (22b) is transverse to, and in particular orthogonal to, the fold line (22c).

[0067] In aspect 47 according to any of the four aspects mentioned above, the separating edge (9a) of the second part (22b) is continuous with the fold line (22c).

[0068] In aspect 48 according to any of the foregoing aspects, the second end of the fold line (22c) forms an acute angle with the outer periphery of the peripheral flange (6).

[0069] In aspect 49 according to any of the foregoing aspects, the flap (10c) of the sealing membrane (10) is an integral part of the sealing membrane and is made of the same plastic material as the rest of the sealing membrane (10), and wherein the sealing membrane (10) is made entirely of plastic material.

[0070] In aspect 50 according to any of the foregoing aspects, the one or one flap (10c) of the closure membrane (10) is substantially triangular in shape.

[0071] In aspect 51 according to any one of aspects from 44 to the preceding aspect, the sealing membrane (10) covers the peripheral flange (6) at least corresponding to the annular bonding region (6a) and has a sealing membrane perimeter that is opposite in shape to the outer perimeter (3) of the peripheral flange (6), except for a portion of the perimeter of the peripheral flange at the cut portion, and wherein, corresponding to the cut portion, the peripheral flange perimeter forms the one / one recess (20), while the sealing membrane does not form any recess and extends above the cut portion.

[0072] In aspect 52 according to any of the foregoing aspects, the second surface (1b) of the defined support (1) of the continuous substrate includes a coating of a non-heat-sealable material configured to prevent the gripping protrusion (22) from bonding with the sealing film (10) or to make the bonding weak.

[0073] In accordance with aspect 53 of the preceding aspect, the coating is made of or includes at least one of the following:

[0074] Wax, optionally synthetic wax, petroleum-derived wax, or mineral wax;

[0075] High melting point thermoplastic resin, optionally polyester, polyamide or PP homopolymer or resin chemically incompatible with the sealing layer of the sealing film;

[0076] Thermosetting resins;

[0077] Smooth or embossed paper;

[0078] Ink or paint;

[0079] Metal, aluminum is optional.

[0080] In aspect 54 according to any of the foregoing aspects, the package (100) is configured to define a pre-opened state, wherein:

[0081] The sealing membrane (10) and the support (1) prevent access to the receiving compartment (5). Optionally, the sealing membrane (10) is stably engaged with the peripheral flange (6) to define a fluid-impermeable receiving compartment (5) for the product (P).

[0082] The flap (10c) of the closure membrane is at least partially raised from the gripping protrusion (22) and optionally angled off, so that the gripping protrusion can be easily operated by the user.

[0083] In aspect 55 according to any of the foregoing aspects, the base (2) of the support (1) includes a bottom wall (8) and a side wall (7), the side wall (7) protruding from the bottom wall (8) and cooperating with the bottom wall (8) to define a receiving seat suitable for receiving the product (P).

[0084] In the 56th aspect according to the preceding aspect, the peripheral flange (6) protrudes from the lateral wall (7) in a radial direction away from the receiving seat, the peripheral flange (6) being away from the bottom wall (8).

[0085] In aspect 57 according to either of the two aspects mentioned above, the gripping protrusion (22), which is part of the peripheral flange (6), also extends radially away from the lateral wall (7).

[0086] The 58th aspect relates to a process for producing a package (100) for containing at least one product (P) according to any of the preceding aspects.

[0087] According to aspect 59 of the preceding aspect, the process includes at least the following steps:

[0088] Provide one or more of the support members (1),

[0089] Position at least one product (P) on the base (2) of each support (1).

[0090] The sealing membrane (10) is constrained to the outer flange (6) of each support (1) to form a corresponding receiving compartment (5), in which the product (P) is positioned.

[0091] In the 60th aspect of the preceding aspect, providing the one or more supports includes providing the substrate having first and second opposing surfaces (1a, 1b), and forming one or more supports (1) using the substrate.

[0092] In aspect 61 according to either of the two preceding aspects, the process includes forming the gripping protrusion (22) by bringing the second portion (22b) into an overlapping position over the first portion (22a).

[0093] In the 62nd aspect of the preceding aspect, the step of forming the gripping protrusion (22) by bringing the second part (22b) into an overlapping position above the first part (22a) includes folding the second part (22b) around the fold line (22c).

[0094] In aspect 63 according to either of the two aforementioned aspects, the step of forming the gripping protrusion (22) includes the step of defining the separation line (9) and the separation edge (9a).

[0095] According to aspect 64 of the preceding aspect, the step of forming the gripping protrusion (22) includes the step of defining the separation line (9) and the separation edge (9a) by forming at least one groove on the support (1) or on the substrate used to form the support (1).

[0096] In aspect 65 according to either of the two aforementioned aspects, the process specifies that bringing the second portion (22b) to the overlapping position above the first portion (22a) is after the step defining the separation line (9).

[0097] In aspect 66 according to any of the preceding aspects from 59 to the preceding aspect, the process includes the step of connecting a first portion (22a) of the gripping protrusion (22) with a second portion (22b) of the gripping protrusion (22).

[0098] According to aspect 67 of the preceding aspect, the joining step includes combining the first portion (22a) with the second portion (22b).

[0099] According to aspect 68 of the preceding aspect, the joining step includes thermally bonding the inner side of the first portion (22a) to the inner side of the second portion (22b).

[0100] In aspect 69 according to any one of aspects from 59 to the preceding aspect, the step of constraining the sealing membrane (10) to the support (1) includes the step of heat-sealing the sealing membrane (10) to the annular bonding region (6a) of the support (1) in a fluid-impermeable manner to define a fluid-impermeable receiving compartment (5).

[0101] In aspect 70, which is according to any of the aspects from 59 to the preceding aspect, the step of constraining the sealing membrane (10) to the annular bonding region (6a) is after the step of forming the gripping protrusion (22).

[0102] According to aspect 71 of any of the aspects from 59 to the preceding aspect, the process includes the step of removing gas (particularly air) from the containing compartment (5) to define vacuum skin packaging (100).

[0103] In the 72nd aspect of the preceding aspect, the step of removing the gas precedes the step of constraining the sealing membrane (10) to the annular bonding region (6a).

[0104] In aspect 73, according to any of the aspects from 59 to the preceding aspect, the process includes the step of injecting a gas (particularly an inert gas) into a containing compartment (5) to define a controlled atmosphere package (100).

[0105] In accordance with aspect 74 of the preceding aspect, the step of injecting gas specifically precedes the step of constraining the sealing membrane (10) to the annular bonding region (6a).

[0106] In aspect 75 according to any one of aspects from 59 to the preceding aspect, the substrate is in the form of a continuous substrate or web, and wherein the step of forming one or more supports using the substrate includes moving the continuous substrate or web along a predetermined forward path (A) and thermoforming the continuous substrate or web.

[0107] In the 76th aspect of the preceding aspect, the process includes the step of performing a straight groove on a continuous substrate or web, the straight groove defining both the straight outer peripheral edge (22d) of the gripping protrusion (22) and the continuous straight side of the outer perimeter (3) of the peripheral flange (6).

[0108] The 77th aspect relates to a packaging apparatus having a control unit configured to command actuators and tools to perform any of the processes of the aspects from the 59th to the preceding aspect.

[0109] The 78th aspect relates to a package according to any of the preceding aspects, wherein, in the closed state of the package, the sealing film (10) forms a flap (10c) configured to be grasped by a user to bring the package from the closed state to a state at least partially open, in which the sealing film (10) is at least partially separated from the support (1) to allow access to the receiving compartment (5).

[0110] The 79th aspect relates to packaging according to any of the foregoing aspects, wherein the flap (10c) configured to be grasped by a user is an integral part of the sealing film and is exclusively made of a portion of the sealing film.

[0111] The 80th aspect relates to a package according to any of the foregoing aspects, wherein the wing (10c) configured to be grasped by a user does not include any part of the support.

[0112] The 81st aspect relates to a package according to any of the foregoing aspects, wherein, in a package-closed state in which the flaps (10c) are parallel to the peripheral flange (6), the peripheral edge (22d) of the gripping protrusion (22) is part of the radial outer perimeter (3) of the peripheral flange (6).

[0113] The 82nd aspect relates to packaging according to any of the foregoing aspects, wherein the packaging (100) is configured to define a pre-opened state, wherein:

[0114] a. A sealing membrane (10) and a support (1) prevent access to the receiving compartment (5), and optionally the sealing membrane (10) is stably engaged with a peripheral flange (6) to define a fluid-impermeable receiving compartment (5) for the product (P).

[0115] b. The 10c flap of the closure membrane is at least partially raised from the gripping protrusion (22) and optionally angled off, such that the gripping protrusion is operable by the user.

[0116] The 83rd aspect relates to packaging according to any of the foregoing aspects, wherein, when the packaging is in a pre-opened state and the flaps are raised from the gripping protrusions and optionally angled off, the raised flaps are exclusively made of a portion of the sealing film material (10).

[0117] The 84th aspect relates to the packaging according to the preceding aspect, wherein the raised wing does not carry any part or material of the support (1).

[0118] The 85th aspect relates to a package according to any of the preceding aspects, wherein the wing (10c) has a free portion that does not cover the gripping protrusion (22) and does not cover the peripheral flange (6), extends above the recess (20) in the perimeter (3) of the peripheral flange (6), and is directly operable by the user.

[0119] The 86th aspect relates to packaging according to any of the foregoing aspects, wherein the free portion of the wing has the same shape and optionally the same size as the gripping protrusion (22).

[0120] The 87th aspect relates to packaging according to any of the preceding aspects, wherein the peripheral flange (6) includes a cut-out portion adjacent to the gripping protrusion (22) and having the shape of a second portion (22b).

[0121] In the 88th aspect of the preceding aspect, the cut portion defines the recess (20) in the outer periphery (3) of the peripheral flange (6) as having the same shape, or the same shape and the same size as the gripping protrusion (22).

[0122] The 89th aspect relates to packaging according to any of the preceding aspects, wherein the peripheral flange (6) includes a cut-out portion adjacent to the gripping protrusion (22) and having the shape of a second portion (22b), the cut-out portion optionally defining the recess (20) in the outer perimeter (3) of the peripheral flange (6) as having the same shape as the gripping protrusion (22), or the same shape and the same size.

[0123] The 90th aspect relates to packaging according to any of the foregoing aspects, wherein, when viewed from above, the outer periphery (3) of the outer flange (6) has a convex shape.

[0124] The 91st aspect relates to packaging according to any of the foregoing aspects, wherein, when viewed from above, the outer perimeter (3) of the outer flange (6) has a convex shape, except that the perimeter is positioned by the portion of the recess (10).

[0125] The 92nd aspect relates to packaging according to any of the foregoing aspects, wherein when the packaging is opened and the sealing film (10) is completely removed from the support (1), no part of the support (1), and in particular no part of the peripheral flange (6), is removed from the support or the peripheral flange due to the opening.

[0126] The 93rd aspect relates to packaging according to any of the foregoing aspects, wherein the surface area of ​​each of the outer sides (i.e., the top and bottom sides) of the gripping protrusion (22) is at least 40%, particularly at least 50%, of the top surface area of ​​the flap (10c). Attached Figure Description

[0127] Some embodiments and aspects of the invention are described below with reference to the accompanying drawings, which are provided for illustrative purposes only and therefore not for limiting purposes, wherein:

[0128] Figure 1 This is a perspective view of the packaging according to the present invention;

[0129] Figure 2 and Figure 3 This is a detailed view of a portion of the packaging according to the invention;

[0130] Figure 4 This is a top view of the packaging according to the present invention;

[0131] Figure 5 and Figure 6 This is a cross-sectional view of a portion of the packaging including the gripping protrusions according to the present invention;

[0132] Figure 7 and Figure 8 This is a perspective view of the packaging according to the invention during the opening of the packaging;

[0133] Figure 9 and Figure 10 This is a view of the corner area that can be used to make the support for the packaging according to the invention; in particular, Figure 9 The image shows the support component prior to the folding step in the manufacturing process of the support component, while... Figure 10 A support is shown during a folding step, which is designed to form a gripping protrusion according to the invention;

[0134] Figures 11 to 15 This is a detailed perspective view of the packaging according to an alternative embodiment of the present invention;

[0135] Figure 16 and Figure 17 This is a detailed perspective view of the packaging according to a further embodiment of the present invention;

[0136] Figure 18 This is a schematic diagram of an apparatus for making packaging according to the present invention;

[0137] Figure 19 This is a top view of the continuous web of the support member according to the present invention. Detailed Implementation

[0138] Agreement

[0139] It should be noted that in this detailed description, corresponding portions illustrated in the various figures are indicated by the same reference numerals. The figures may illustrate the purpose of the invention by being presented non-scaled; therefore, portions and components illustrated in figures relevant to the purpose of the invention may be shown only schematically.

[0140] The terms “upstream” and “downstream” refer to the direction in which the packaging or the support for making the packaging moves along a predetermined path that begins at the starting or forming station of the support for the packaging, passes through the packaging station, and then continues until the packaging unloading station.

[0141] definition

[0142] product

[0143] The term Product P means any kind of article or composition of articles. For example, a product can be a food product and can be in solid, liquid, or gel form, that is, in two or more of the aforementioned aggregate states. In the food industry, products can include: meat, fish, cheese, processed meats, various types of prepared and frozen meals.

[0144] Control Unit

[0145] The packaging equipment described herein includes at least one control unit designed to perform steps of a process for making packaging. Obviously, depending on design choices and operational needs, the control unit may be a single control unit or a combination of multiple different control units. The term control unit means an electronic component that may include at least one of the following: a digital processor (e.g., including at least one selected from the group consisting of a CPU, GPU, GPGPU), a memory (or multiple memories), analog circuitry, or a combination of one or more digital processing units and one or more analog circuitry. The control unit may be “constructed” or “programmed” to perform some steps: this can be done in practice by any means that allows the control unit to be constructed or programmed. For example, in the case where the control unit includes one or more CPUs and one or more memories, one or more programs may be stored in a suitable memory bank connected to said one or more CPUs; said one or more programs contain instructions that, when executed by said one or more CPUs, program or construct the control unit to perform the operations described with respect to the control unit. Alternatively, if the control unit is analog circuitry or includes analog circuitry, the control unit circuitry may be designed to include circuitry configured to process electrical signals in use to perform steps associated with the control unit. The control unit may include one or more digital units (e.g., microprocessor type), or one or more analog units, or a suitable combination of digital and analog units; the control unit may be configured to coordinate all actions necessary for the execution of instructions and instruction sets.

[0146] actuator

[0147] The term actuator refers to any device capable of causing movement on a body, for example, according to a command from a control unit (the actuator receives the command sent by the control unit). Actuators can be of the electric, pneumatic, mechanical (e.g., using a spring), or another type.

[0148] Support component 1

[0149] The support 1 may be a flat support having a peripheral band that can be regarded as a flange, or it may be in the form of a tray including at least one base and at least one lateral wall exposed from the outer periphery of the base and a peripheral flange exposed radially outward from the upper peripheral edge of the lateral wall.

[0150] The support 1 has a top surface on which the product P can be placed and / or a volume in which the product can be contained.

[0151] When the support member 1 is in the form of a tray, it may include an upper edge portion that is radially exposed from the free edge of the side wall opposite the base: the upper edge portion is exposed from the side wall in an outward direction relative to the volume of the tray.

[0152] In the case of a flat support, it can be any shape, such as rectangular, rhomboid, circular, or elliptical; similarly, a support is a tray with side walls, which can have a base of any shape, such as rectangular, rhomboid, circular, or elliptical.

[0153] Support 1 can be formed by means of a specific manufacturing process different from the packaging process, or it can be formed online according to the packaging process.

[0154] The support 1 may be at least partially made of a paper material, optionally having at least 50% by weight, and preferably at least 70% by weight, organic material, including one or more of cellulose, hemicellulose, lignin, and lignin derivatives. The paper material of this subject matter extends between the first and second main unfolding surfaces. In one embodiment variation, the paper foil used to make the support may be covered by a plastic coating (such as a food-grade film) on at least a portion of the first and / or second main unfolding surfaces. If the coating is arranged to cover at least a portion of the first main unfolding surface, the coating will define the inner surface of the support. Conversely, if the coating is arranged on the second main unfolding surface, the coating will define the outer surface of the support. The coating may also be used to define a barrier against water and / or humidity, thereby beneficially preventing the weakening and loss of structural properties of the support, the consequence of which is uncontrolled deformation of the paper material constituting the latter component. The coating can be applied to the paper material (as specified above, on the inner and / or outer sides of the support) in the form of a so-called varnish deposited from a solution or sprayed, and its thickness is typically included between 0.2 μm and 10 μm. Alternatively, the coating may comprise a plastic film, such as polyethylene, which can be applied to one or both sides (inner and / or outer sides) of the paper material defining the support by means of a roll-forming process. In the case of applying the coating by roll-forming, the value of the plastic film (coating) can be, for example, in the range of 10 μm to 400 μm of the coating material (i.e., polyethylene), particularly in the range of 20 μm to 200 μm, and even more particularly in the range of 30 μm to 80 μm. As an example, the plastic coating material may be selected from the following materials: PP, PE (HDPE, LDPE, MDPE, LLDPE), EVA, polyester (including PET and PETg), PVdC.

[0155] Alternatively, the support may be made at least partially of a single layer or multiple layers of thermoplastic material. The support may be provided with gas-barrier properties. As used herein, this term refers to a film or sheet of material having an oxygen permeability of less than 200 cm³ / (m²*day*bar), less than 150 cm³ / (m²*day*bar), or less than 100 cm³ / (m²*day*bar) when measured according to ASTM D-3985 at 23°C and 0% relative humidity. Suitable gas-barrier materials for single-layer thermoplastic containers include, for example, polyester, polyamide, ethylene vinyl alcohol (EVOH), PVdC, etc.

[0156] The support may be made of a multilayer material, including at least one of the following: one or more gas barrier layers, one or more heat-sealable layers (suitable for allowing a coating film to be sealed to the surface of the support), and one or more outer layers (e.g., polyamide, polypropylene, or polyester).

[0157] Gas barrier polymers that can be used for the gas barrier layer are PVDC, EVOH, polyamide, polyester, and mixtures thereof. Typically, the PVDC barrier layer will contain plasticizers and / or stabilizers as known in the art. The thickness of the gas barrier layer will preferably be set to provide the material constituting the support with an oxygen permeability of less than 50 cm³ / (m²*day*atmospheric pressure), preferably less than 10 cm³ / (m²*day*atmospheric pressure), at 23°C and 0% relative humidity, as measured according to ASTM D-3985.

[0158] The heat-sealable layer will be selected from polyolefins (such as ethylene homopolymers or copolymers, propylene homopolymers or copolymers, ethylene / vinyl acetate copolymers, ionomers and homopolymers or copolyesters, such as PETG, ethylene glycol-modified polyethylene terephthalate).

[0159] For example, in order to enable the gas barrier layer to adhere better to the adjacent layer, additional layers (such as adhesive layers) may preferably be present in the multilayer material of the support and selected based on the specific resin used for the gas barrier layer.

[0160] In the case of a multi-layered structure, a portion of it may be formed as foam. For example, the multi-layered material used to form the support may include (from the outermost layer to the layer in contact with the food located further inside): one or more structural layers, which are typically made of materials such as expanded polystyrene, expanded polyester, or expanded polypropylene, or made of cardboard, or made of sheets such as polypropylene, polystyrene, poly(vinyl chloride), or polyester; a gas barrier layer and a heat-sealable layer.

[0161] The total thickness of the support member can be up to 5 mm. For example, the thickness can be between 0.04 mm and 3.00 mm, optionally between 0.05 mm and 1.50 mm, or even more optionally between 0.6 mm and 1.00 mm. In one embodiment, the support member includes a total thickness between 0.06 mm and 0.4 mm.

[0162] The support may be made entirely of paper material (optionally coated with a plastic film), or it may be made entirely of plastic material. Alternatively, the support may be made at least partially of paper material and at least partially of plastic material; in particular, the support may be made of plastic material internally and at least partially covered with paper material externally.

[0163] Supports can also be used to define so-called ready-to-eat meal packaging; in this configuration, the supports are designed so that they can be inserted into an oven or microwave oven for heating and / or cooking the food product placed in the package. In this embodiment (supports for ready-to-eat meal packaging), the supports can be made, for example, of a paper material (particularly cardboard) covered with polyester, or can be made entirely of polyester resin. For example, supports suitable for ready-to-eat meal packaging are made of PP, CPET, APET or APET / CPET, foam or non-foam materials. The supports may further include a heat-sealable layer of low-melting-point material on the film. This heat-sealable layer can be co-extruded with the PET base layer, or it can be deposited on the base film by solvent deposition or extrusion coating.

[0164] In a further embodiment, the support may be made at least partially of a metallic material (particularly aluminum). The support may also be made at least partially of aluminum and / or at least partially of a paper material. Generally, the support may be made of at least one of the following materials: plastic, paper, or metal.

[0165] thermal bonding

[0166] In the course of the description (refer to some possible embodiments) and in some claims, it is indicated that certain surfaces of the support 1 (particularly the second surface 1b of the support 1) and the surfaces of the gripping protrusions 22 destined to contact the sealing film 10 may not be thermally bonded to the sealing film 10. This means that at the temperature required to thermally bond the sealing film 10 to the first surface 1a of the support (i.e., a temperature sufficient to thermally bond the sealing film 10 to the first surface 1a of the support), the aforementioned second surface 1b of the support 1 and the aforementioned surfaces of the gripping protrusions do not bond to (or barely adhere to) the plastic film 10, to such an extent that the plastic film 10 can be easily peeled off from the support surface 1b or from the gripping protrusions by the user with virtually no effort.

[0167] This is achieved when the support is made of a continuous substrate (particularly plastic foil) having a first surface 1a and a second surface 1b opposite to the first surface 1a, wherein at a certain temperature, the thermal bonding properties of the second surface 1b to the sealing film 10 differ from those of the first surface 1a to the sealing film: specifically, at the temperature at which the sealing film 10 bonds (particularly in a fluid-impermeable, sealing manner) to the first surface 1a, the second surface 1b does not bond to the sealing film or bonds to the sealing film to a significantly lower degree compared to the first surface. For example, this can be achieved by making the support having at least one underlayer (defining the second surface 1b), said at least one underlayer comprising a non-thermally bondable (particularly non-heat-sealable) material selected from the following:

[0168] Waxes, such as synthetic waxes, petroleum-derived waxes, and mineral waxes;

[0169] Plastics, such as high-melting-point thermoplastic resins (e.g., polyester (especially PET), polyamide or PP homopolymer), or resins chemically incompatible with the sealing layer of the sealing film (e.g., where the sealing material is polyethylene and the coating is made of PETg) or thermosetting resins.

[0170] Smooth or embossed paper;

[0171] ink,

[0172] paint;

[0173] Metals, such as aluminum.

[0174] In practice, thanks to the described construction of support 1, the strength of the thermal bond or weld between the closure membrane and the second surface 1b or the surface of the gripping protrusion 22 is significantly less than the strength of the thermal bond or weld between the closure membrane 10 and the first surface 1a (particularly the first surface at the flange 6). A method for measuring the strength of a weld (referred to herein as “weld force” or “weld strength”) is described in ASTM F-88-00. The weld force of the closure membrane 10 to surface 1a can, for example, be greater than 100 g / 25 mm, preferably greater than 200 g / 25 mm, more preferably greater than 400 g / 25 mm, and even more preferably greater than 600 g / 25 mm, while the weld force of the closure membrane 10 to the second surface 1b or the surface of the gripping protrusion 22 can be less than 100 g / 25 mm, preferably less than 75 g / 25 mm, even more preferably less than 50 g / 25 mm, or even zero.

[0175] Sealing membrane 10

[0176] The sealing film 10 is made of a plastic material (particularly a polymer material) and is applied to a support (flat support or tray) to form a fluid-impermeable package for containing the product. To create a vacuum package, the film 10 applied to the support 1 is, for example, a flexible single-layer or multi-layer material comprising at least a first heat-weldable outer layer capable of being welded to the surface 1a of the support. In the case of a multi-layer sealing film 10, the film may include an optional gas barrier layer and a second heat-resistant outer layer.

[0177] If the desired outcome is to produce modified atmosphere packaging (MAP) or packaging in a natural atmosphere (unmodified atmosphere), the film applied to the support can be a film made of plastic (particularly polymeric materials) and can typically be single-layered or multi-layered. In the case of multi-layered films, it may include at least one of the following: one or more gas barrier layers, one or more heat-sealable layers (suitable for allowing the plastic film to be welded to the support), one or more heat-resistant layers, and one or more outer layers (e.g., polyamide, polypropylene, or polyester).

[0178] For use in skin packaging or VSP packaging processes, the plastic material (especially polymers) used for the sealing film should be readily formable, as it needs to be stretched and softened by contact with the heating plates of the packaging equipment before being placed on the product and support. The film must be shaped to fit the product shape and, where possible, to fit the internal shape of the support when resting on the product.

[0179] The heat-sealable layer (e.g., the outer layer) may comprise any polymer capable of being welded to the inner surface of the support. Suitable polymers for the heat-sealable layer may be ethylene and ethylene copolymers, such as LDPE, ethylene / α-olefin copolymers, ethylene / acrylic acid copolymers, ethylene / vinyl acetate copolymers or ethylene / vinyl acetate copolymers, ionomers, and copolyesters, such as PETG. Preferred materials for the heat-sealable layer are LDPE, ethylene / α-olefin copolymers, such as LLDPE, ionomers, ethylene / vinyl acetate copolymers, and mixtures thereof.

[0180] Depending on the product to be packaged, the film may include a gas barrier layer. Gas barrier layers typically comprise oxygen-impermeable resins such as PVDC, EVOH, polyamide, and mixtures of EVOH and polyamide. Typically, the thickness of the gas barrier layer is set to provide an oxygen permeability of less than 100 cm³ / m² * day * atmospheres at 23°C and 0% relative humidity, as measured according to ASTM D-3985, preferably less than 50 cm³ / (m² * day * atmospheres). Common polymers used for heat-resistant outer layers are, for example, ethylene homopolymers or copolymers (especially HDPE), ethylene copolymers and cyclic olefins (such as ethylene / norbornene copolymers), propylene homopolymers or copolymers, ionomers, polyesters, and polyamides.

[0181] The multilayered membrane may further include other layers, such as adhesive layers, filler layers, etc., to provide the necessary thickness of the membrane and improve its mechanical properties, such as puncture resistance, casual use resistance, and formability. The membrane can be obtained by any suitable co-extrusion process through flat or round extruder heads, optionally by co-extrusion or hot blow molding.

[0182] Furthermore, for use in skin packaging or VSP packaging processes, the film is essentially non-oriented. Typically, when the film is brought into contact with a heating plate during the vacuum skin packaging process, the film, or one or more layers thereof, is cross-linked to improve, for example, the film's strength and / or heat resistance. Cross-linking can be achieved by using chemical additives or by subjecting the film layers to energy radiation treatment (such as high-energy electron beam treatment) to induce cross-linking between molecules of the irradiated material. Film thicknesses suitable for this application can range from 50 μm to 500 μm, optionally from 60 μm to 3000 μm, and even more optionally from 65 μm to 100 μm.

[0183] For use in packaging processes of products under controlled atmosphere (MAP) or natural atmosphere (unmodified atmosphere), the film (plastic film, especially polymer film) applied to the substrate is typically single-layered or multi-layered, having at least one heat-sealable layer optionally capable of heat shrinking under thermal action. The applied film may further include at least one gas barrier layer and optionally a heat-resistant outer layer. In particular, the film can be obtained through co-extrusion and lamination processes. The film may have a symmetrical or asymmetrical structure and may be single-layered or multi-layered. Multilayered films consist of at least two layers, more often at least five layers, and frequently at least seven layers.

[0184] The total thickness of the membrane can range from 30 μm to 500 μm, optionally from 40 μm to 300 μm, and even more optionally from 50 μm to 200 μm; in one embodiment, the membrane has a thickness between 65 μm and 100 μm. These membranes can potentially be crosslinked. Crosslinking can be achieved by irradiation with high-energy electrons at appropriate dose levels, as is known in the art. The membranes described above can be heat-shrinkable or heat-curable. Heat-shrinkable films typically exhibit free shrinkage values ​​in both the longitudinal and transverse directions at 120°C in the range of 2% to 80%, typically from 5% to 60%, particularly from 10% to 40% (measured in oil according to ASTM D2732). Heat-curable films typically have shrinkage values ​​of less than 10% in both the transverse and longitudinal directions at 120°C, typically less than 5% (measured in oil according to ASTM 2732 method). The membrane typically comprises at least one heat-sealable layer and an outer layer (outermost layer) typically composed of a heat-resistant polymer or polyolefin. The weld layer typically comprises a heat-sealable polyolefin, which may further comprise a single polyolefin or a mixture of two or more polyolefins, such as polyethylene or polypropylene or mixtures thereof. The weld layer may also be provided with anti-fogging properties using known techniques, for example, by incorporating anti-fogging additives into its composition, or by coating or spraying one or more anti-fogging additives to counteract fogging on the weld layer surface. The weld layer may also include one or more plasticizers. The outermost layer may comprise polyester, polyamide, or polyolefin. In some configurations, a mixture of polyamide and polyester may be used for the outermost layer. In some cases, the membrane includes a gas barrier layer. Barrier membranes typically have a velocity of less than 200 cm⁻¹, measured according to ASTM D-3985 method and evaluated at 23°C and 0% RH. 3 / (m 2 (Atmospheric pressure) and more often below 80 cm 3 / (m 2 The oxygen permeability (O2) at *atmospheric pressure, also known as OTR (Oxygen Permeability). Barrier layers are typically made of thermoplastic resins selected from saponified or hydrolyzed products of ethylene-vinyl acetate copolymer (EVOH), amorphous polyamides, and vinylidene chloride and mixtures thereof. Some materials include an EVOH barrier layer forming a layer between two polyamide layers. In some packaging applications, the membrane does not include any gas barrier layer. These membranes typically comprise one or more polyolefins as defined herein. Non-gas barrier membranes typically have a 100 cm² depth (evaluated according to ASTM D-3985 at 23°C and 0% RH). 3 / (m 2 Atmospheric pressure (up to 10,000 cm) 3 / (m 2 *Atmospheric pressure), more commonly up to 6000 cm 3 / (m2 OTR (at *atmospheric pressure).

[0185] Special compositions based on polyester are those used in films for so-called ready-to-eat meals. For these films, the polyester resin may constitute at least 50%, 60%, 70%, 80%, and 90% by weight of the film. These films are typically used in conjunction with supports, particularly trays, made of polyester. In the case of packaging fresh red meat, a double-layer film comprising an oxygen-permeable inner film and an oxygen-impermeable outer film can be used. This combination of two films greatly prevents discoloration of the meat, even in the most critical situations of barrier packaging of fresh meat, or when the packaged meat extends beyond the cavity defined by the tray, or when the product protrudes from the upper outer edge of the side wall. These films are described, for example, in European patent applications EP1848635 and EP 0690012.

[0186] The membrane can be a single layer. Typical compositions of single-layer membranes include polyesters and mixtures thereof as defined herein, or polyolefins and mixtures thereof as defined herein. In all membrane layers described herein, the polymeric component may contain suitable amounts of additives typically included in such compositions. Some of these additives are typically included in the outer layer or one of the outer layers, while others are typically added to the inner layer. These additives include slip agents or anti-blocking agents such as talc, waxes, silica, etc., or antioxidants, stabilizers, plasticizers, fillers, pigments and dyes, crosslinking inhibitors, crosslinking agents, UV absorbers, odor absorbers, oxygen absorbers, bactericides, antistatic agents, antifogging agents, or compositions thereof, as well as similar additives known to those skilled in the art of packaging.

[0187] The membrane may have one or more pores adapted to allow fluid communication between the internal volume of the package and the external environment, or, in the case of food products, to allow the packaged food to exchange gases with the outside. Perforation of the membrane can be performed, for example, by means of a laser beam or mechanical devices (such as rollers equipped with needles). The number of perforations and the size of the pores affect the membrane's permeability to gases. Microperforated membranes are typically characterized by a permeability of 2500 cm⁻¹. 3 / (m 2 Atmospheric pressure (up to 1,000,000 cm) 3 / (m 2 The OTR value (based on ASTM D-3985 at 23°C and 0% RH) is measured at *atmospheric pressure. Large-perforation membranes are typically characterized by perforations exceeding 1,000,000 cm⁻¹. 3 / (m 2 The OTR value of *atmospheric pressure* (evaluated according to ASTM D-3985 at 23°C and 0%RH).

[0188] Material Specifications

[0189] The term paper material means paper or paperboard; in particular, sheet material that can be used to make supports may have a weight between 30 g / m² and 600 g / m², particularly between 40 g / m² and 500 g / m², or even more particularly between 50 g / m² and 250 g / m².

[0190] PVDC is any vinylidene chloride copolymer in which the major amount of the copolymer includes vinylidene chloride and the minor amount of the copolymer includes one or more unsaturated monomers that can be copolymerized with it, typically vinyl chloride and alkyl acrylates or alkyl methacrylates (e.g., methyl acrylate or methyl methacrylate) and mixtures thereof in different proportions.

[0191] The term EVOH includes saponified or hydrolyzed ethylene-vinyl acetate copolymers, and refers to ethylene / vinyl alcohol copolymers having a content of ethylene comonomers preferably consisting of a percentage of ethylene from about 28 mol% to about 48 mol%, more preferably from about 32 mol% and about 44 mol%, and even more preferably, having a saponification degree of at least 85%, preferably at least 90%.

[0192] The term polyamide is intended to refer to homopolymers and copolymers or terpolymers. Specifically, it includes aliphatic polyamides or copolyamides, such as polyamide 6, polyamide 11, polyamide 12, polyamide 66, polyamide 69, polyamide 610, polyamide 612, copolyamide 6 / 9, copolyamide 6 / 10, copolyamide 6 / 12, copolyamide 6 / 66, copolyamide 6 / 69, and aromatic and partially aromatic polyamides or copolyamides, such as polyamide 61, polyamide 6I / 6T, polyamide MXD6, polyamide MXD6 / MXDI, and mixtures thereof.

[0193] The term polyester refers to a polymer obtained from the polycondensation reaction of a dicarboxylic acid with a dihydroxyl alcohol. Suitable dicarboxylic acids are, for example, terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, etc. Suitable dihydroxyl alcohols are, for example, ethylene glycol, diethylene glycol, 1,4-butanediol, 1,4-cyclohexanediethanol, etc. Useful examples of polyesters include polyethylene terephthalate and copolyesters obtained by reacting one or more carboxylic acids with one or more dihydroxyl alcohols.

[0194] The term copolymer refers to a polymer derived from two or more types of monomers, and includes terpolymers. Ethylene homopolymers include high-density polyethylene (HDPE) and low-density polyethylene (LDPE). Ethylene copolymers include ethylene / α-olefin copolymers and unsaturated ethylene / ester copolymers. Ethylene / α-olefin copolymers typically comprise copolymers of ethylene and one or more comonomers selected from α-olefins having between 3 and 20 carbon atoms, such as 1-butene, 1-pentene, 1-hexene, 1-octene, 4-methyl-1-pentene, etc. Ethylene / α-olefin copolymers typically have a content of about 0.86 g / cm³. 3 To approximately 0.94 g / cm 3 The density range is generally understood to be between about 0.915 g / cm³ and about 0.94 g / cm³, and particularly between about 0.915 g / cm³ and about 0.925 g / cm³. Sometimes, linear polyethylene with a density range between about 0.926 g / cm³ and about 0.94 g / cm³ is referred to as linear medium-density polyethylene (LMDPE). Lower density ethylene / α-olefin copolymers may be called very low-density polyethylene (VLDPE) and ultra-low-density polyethylene (ULDPE). Ethylene / α-olefin copolymers can be obtained using heterogeneous or homogeneous polymerization processes. Another useful ethylene copolymer is an unsaturated ethylene / ester copolymer, which is an ethylene copolymer and one or more unsaturated ester monomers. Useful unsaturated esters include vinyl esters of aliphatic carboxylic acids (where the ester has between 4 and 12 carbon atoms, such as vinyl acetate) and alkyl esters of acrylic acid or methacrylic acid (where the ester has between 4 and 12 carbon atoms). Ionomers are copolymers of ethylene and unsaturated monocarboxylic acids, which are carboxylic acids neutralized by metal ions (such as zinc or preferably sodium). Useful propylene copolymers include propylene / ethylene copolymers, which are copolymers of propylene and ethylene, with a weight percentage content primarily of propylene, and propylene / ethylene / butene trimers, which are copolymers of propylene, ethylene, and 1-butene.

[0195] Detailed description

[0196] Package

[0197] Reference numeral 100 indicates a package that is constructed as a whole for containing at least one product P (e.g., a food type).

[0198] For example in Figure 1As can be seen, the packaging 100 includes at least one support 1 configured to receive product P and at least one sealing film 10 (e.g., a sealing film of plastic material) sealed to the support 1: the film 10 is configured to cooperate with the support 1 to define a receiving compartment 5 for product P and to be subsequently removed, wholly or partially, by the user during the step of opening the packaging 100, so as to allow retrieval of product P or access to product P.

[0199] The accompanying drawings illustrate a support member 1 having a polygonal shape, particularly a rectangle. However, the possibility of providing a support member 1 having a square, rhomboid, triangular, elliptical, circular, semi-circular shape, or a combination thereof is not excluded. The support member 1 is formed from a continuous substrate, such as a plastic foil material, and includes at least one base 2, which represents a portion of the support member 1 suitable for receiving and directly supporting the product P; the support member 1 further includes at least one peripheral flange 6 surrounding the base 2. The peripheral flange 6 further includes an annular bonding region 6a adapted to bond the film 10 to close the package 100 and to cooperate with the closing film 10 to define a fluid-impermeable receiving compartment 5 for receiving the product P. The fluid-impermeable package 100 can be a vacuum package 100 (a so-called "skin" type package), wherein the closing film 10 is adhered as a skin to the product P and to at least a portion of the surface 1a (upper surface) of the support member that is not covered by the product: thus, in this case, the annular bonding region 6 at the flange 6 is only a part of the actual bonding area between the covering film and the support member. Alternatively, the containment compartment 5 may contain a predetermined gas or gas mixture to define the modified atmosphere package 100 (so-called "MAP" type package). In a further alternative, the package may be sealed at atmospheric pressure without a modified atmosphere within the containment compartment 5.

[0200] The peripheral flange 6 extends radially around the base 2 to define a closed perimeter 3. In the normal use state of the packaging, wherein the packaging 100 rests on the base 2 of the support 1, the peripheral flange 6 preferably extends along a substantially horizontal plane.

[0201] In the case of the flat support member 1, the outer flange 6 and the base 2 are basically located on the same plane (the flat support member is not shown in the figure).

[0202] On the other hand, in the case of a support with sidewalls (see figure), the flange 6 is vertically spaced from the base 2 and is specifically arranged at a different height from the base 2, so that the support 1 can substantially define a tray with a cavity for receiving the product (trays are typically used when the product has a vertical extension); in this case, the flange 6 can extend along a plane spaced from the base, specifically parallel to the lying plane of the base 2. More specifically, the tray-shaped support 1 shown in the figure includes a bottom wall 8 and a side wall 7, which protrudes transversely from the bottom wall 8 and cooperates with the bottom wall 8 to define a receiving compartment 5 for the product P: the flange 6 protrudes radially away from the top edge of the side wall 7. The side wall 7 can form an angle with the base wall that is included between 90° and 160°, more specifically between 90° and 150°, or even more specifically between 100° and 130°. As can be seen from the accompanying drawings, the top edge of the side wall 7 defines the upper opening of the support 1 (or the upper opening of the tray), through which the product P can pass during the packaging process to be positioned in the receiving compartment 5, and then the support and thus the product are closed by the sealing film 10. The top edge of the side wall 7 may have a shape similar to the shape of the outer perimeter of the bottom wall 8. In fact, the drawings show an embodiment of the support 1 in which both the outer perimeter of the side wall 7 and the outer perimeter of the bottom wall 8 have a rectangular shape.

[0203] The outer flange 6 extends radially away from the top edge of the lateral wall 7: the flange may extend radially between 1 mm and 50 mm, particularly between 2 mm and 30 mm.

[0204] Although the description beginning here refers to an alternative to the support in the form of a tray with sidewalls as shown in the accompanying drawings, note that the connection of the sealing film 10 to the peripheral flange 6 and the way the gripping protrusion 22 can be formed and connected to the rest of the packaging also apply to the alternative to the flat support.

[0205] The sealing film 10 is joined to the annular bonding region 6a of the flange 6 in a fluid-impermeable manner. Specifically, the sealing film 10 is joined to the flange 6 such that the receiving compartment 5 is tightly sealed and isolated from the external environment. The annular bonding region 6a is a continuous strip extending around the base 2 and surrounding the product in order to establish an airtight seal for the latter, thus isolating it from the atmosphere outside the packaging: in particular, the annular bonding region 6a extends radially away from the base 2 along a radial extension included between 1 mm and 50 mm, and particularly between 2 mm and 30 mm.

[0206] The sealing film 10 includes a first surface 10a and a second surface 10b, which define an upper and lower surface opposite to each other, respectively, in use. Furthermore, the support member 1 is formed from a continuous substrate, such as a plastic foil, having a first surface 1a and a second surface 1b opposite to each other. In practice, the first surface 1a and the second surface 1b define the upper and lower surfaces of the support member 1, excluding one or more areas of the flange defining the gripping protrusions 22, as will be described in detail below. The second surface 10b of the sealing film 10 faces the support member 1, and at least a portion of the second surface 10b of the sealing film 10 (particularly the peripheral band of the second surface 10b of the sealing film 10) is bonded to the first surface 1a at the annular bonding area 6a of the flange. Therefore, the first surface 10a of the sealing film 10 and the second surface 1b of the support member point towards the outside of the packaging 1 and define a large portion of the outer surface of the same packaging.

[0207] According to one aspect, the thermal bonding properties of the second surface 1b of the support member 1 to the sealing film 10 may be significantly different from the thermal bonding properties of the first surface 1a to the same sealing film, so as to thermally bond the sealing film to the first surface 1a impermeably and firmly, but not thermally bonded or weakly thermally bonded to the second surface 1b. Specifically, the second surface 1b of the substrate forming the support member 1 includes an outer layer that prevents (or significantly reduces) bonding to the sealing film 10, thereby substantially preventing the second surface 1b from being heat-sealed to the sealing film 10. The second surface 1b may include non-heat-bondable (especially non-heat-sealed) materials as previously described in the definition section, such as: wax; plastics having high-melting-point thermoplastic resins, such as, for example, polyester (especially PET), polyamide or PP homopolymers, or resins chemically incompatible with the sealing layer of the sealing film. Furthermore, non-heat-sealed materials may include smooth or embossed paper, ink, paint, and metals (such as aluminum).

[0208] On the other hand, the first surface 1a of the support member 1 exhibits a much better bonding property with the sealing film 10 than the second surface 1b, thereby allowing and promoting thermal bonding with the sealing film 10, especially heat sealing.

[0209] According to a further aspect, the substrate forming the support is selected such that the first surface 1a of the support 1 is thermally bonded (and specifically, heat-sealed) to the sealing film 10 at a thermal bonding temperature range including between 140°C and 240°C, particularly between 180°C and 220°C, while the second surface 1b of the support 1 is not thermally bonded (and specifically, not heat-sealed) to the sealing film at the same thermal bonding temperature range. In other words, when the sealing film is placed at a temperature within the mentioned temperature range and pressed against the substrate forming the support 1, the first surface 1a is thermally bonded to the sealing film 10, while the second surface 1b is not thermally bonded (or weakly bonded with a bonding strength significantly less than that between the sealing film and the first surface 1a) to the sealing film.

[0210] As shown in the figure, the package 100 is configured to define a closed state in which the sealing film 10 cooperates with the support member 1 to determine a seal on the receiving compartment 5 and prevent access to the latter (see example). Figure 1 , Figure 7 and Figure 13 At least in the closed state, the sealing film 10 further forms a flap 10c, which is configured to be grasped by the user to bring the package from the closed state to the open state (see...). Figure 8 In the open state, the sealing film 10 is at least partially separated from the support 1 to allow access to the receiving compartment 5. When the package is closed, the flap 10c extends substantially parallel to the peripheral flange 6 and radially beyond the annular bonding region 6a, such that the portion of the sealing film joined (i.e., thermally bonded) to the annular bonding region is inserted between the receiving compartment 5 and the flap 10c. The flap 10c is integral with the rest of the film 10, effectively forming a single sheet body. The flap 10c is preferably arranged at the corner portion of the sealing film 10 and may be substantially triangular in shape. Furthermore, the flap 10c is not bonded to the peripheral flange 6, allowing the user to lift the flap from the flange, grasp it, and tear the sealing film from the annular bonding region. According to the embodiment shown in the figures, the sealing film 10 is rectangular in shape; however, different shapes may also be provided, such as any polygonal shape (especially a square shape) or a circular or semi-circular shape.

[0211] The peripheral flange 6 further forms a gripping protrusion 22. For example, the gripping protrusion 22 may be an edge portion of the peripheral flange 6 and thus extend in a direction away from the base 2. Depending on the design choice, the gripping protrusion 22 may have a polygonal shape, such as a triangle, rectangle, trapezoid, or a combination thereof. Of course, other shapes are not excluded.

[0212] like Figure 7 and Figure 8 As shown, the gripping protrusion 22 is configured to be operated by the user during the step of opening the package 100: the user can grasp both the gripping protrusion 22 and (i.e., with the other hand) the sealing film in order to remove the sealing film from the support 1 and access the receiving compartment 5. When the support has a peripheral flange 6 with a polygonal perimeter 3, the gripping protrusion 22 is preferably arranged at the corner of the flange.

[0213] The gripping protrusion 22 includes a first portion 22a, which is integrally connected to and coplanar with the peripheral flange 6 (see packaging shown from the bottom). Figure 3 ,as well as Figure 5 and Figure 6(Cross-sectional view). The first portion 22a includes an inner side defined by a corresponding portion of the first surface 1a and an outer side opposite to the inner side defined by a corresponding portion of the second surface 1b: the portion of the first surface 1a at the first portion 22a of the gripping protrusion 22 is coplanar with a portion of the first surface 1a of the remainder of the peripheral flange 6, while the portion of the second surface 1b extending to the first portion 22a of the gripping protrusion 22 is coplanar with the second surface 1b of the remainder of the peripheral flange 6 (see...). Figure 5 Specifically, the inner side of the first portion 22a of the gripping protrusion 22 is entirely formed by the portion of the first surface 1a, while the outer side of the first portion 22a of the gripping protrusion 22 is entirely defined by the portion of the second surface 1b.

[0214] The gripping protrusion 22 also includes a second portion 22b, which, as will be discussed further below, is derived from a portion of the remaining portion of the forming support 1 of the same substrate and specifically from a portion of the flange 6 that is flipped onto the first portion 22a (e.g., by folding the second portion 22b over and stacking it with the first portion), such that the second portion 22b is positioned precisely above the first portion 22a: the first portion 22a and the second portion 22b are preferably connected to each other. The second portion 22b includes an inner side defined by a corresponding portion of the first surface 1a and an outer side defined by a corresponding portion of the second surface 1b opposite to the inner side. In particular, the inner side of the second portion 22b of the gripping protrusion 22 is entirely defined by the corresponding portion of the first surface 1a, while the outer side is entirely defined by the corresponding portion of the second surface 1b. The gripping protrusion 22 presents the inner side of the first portion 22a directly facing and contacting the inner side of the second portion 22b, such that portions of the first surface 1a (one portion belonging to the first portion 22a and one portion belonging to the second portion 22b) are in direct contact, such as... Figure 6 As shown: Specifically, the inner side of the first portion 22a is parallel to the inner side of the second portion 22b. With the design of the gripping protrusion 22 described above, the outer side of the gripping protrusion 22 is entirely defined by a portion of the second surface 1b. In a preferred variant disclosed herein, the outer side of the gripping protrusion is a portion of the second surface 1b, which is characterized by being non-thermally bondable to the sealing membrane 10: in this way, due to the presence of a non-thermally bondable material on the outer side of the gripping protrusion 22 (i.e., on the top side under reference usage conditions), the sealing membrane (and in particular the flaps 10c) cannot be thermally bonded to the gripping protrusion 22.

[0215] The second portion 22b of the gripping protrusion 22 is preferably arranged above the first portion 22a by folding the second portion 22b around the fold line 22c: in this way, the folding step allows for a gripping protrusion that externally presents the second surface 1b and maintains a physical connection to the first portion at the fold line. Furthermore, as... Figure 9As shown, the first part 22a and the second part 22b can have the same shape.

[0216] The first portion 22a may be thermally bonded (or connected in any other suitable manner) to the second portion 22b of the gripping protrusion 22 at the corresponding inner side, which is defined by the corresponding direct facing portion of the first surface 1a, preferably of a thermally bondable material.

[0217] According to an aspect of the invention, the gripping protrusion 22 includes a peripheral edge 22d, which is part of the radial outer perimeter 3 of the peripheral flange 6. This allows for maximizing the size of the gripping protrusion without compromising the size of the annular engagement region 6a. In particular, the peripheral edge 22d of the gripping protrusion is formed by overlapping the peripheral edges of the first portion and the second portion 22b.

[0218] exist Figures 1 to 10 In one embodiment (which relates to a tray with a flange 6 having a polygonal perimeter 3), the peripheral edge 22d of the gripping protrusion 22 includes a straight side 22e that extends as part of the straight side of the outer perimeter 3 of the outer flange 6. Figure 4 As shown, the straight side of the flange 6 thus includes the aforementioned straight side 22e of the peripheral edge 22d of the gripping protrusion 22. In other words, the straight side 22e of the gripping protrusion 22 defines a portion of the peripheral edge 22d of the gripping protrusion 22, and simultaneously defines a straight line and end segment on one side of the outer perimeter 3 of the peripheral flange 6; on the other hand, at the fold line 22c, a second straight side 22e' of the peripheral edge 22d of the gripping protrusion 22 is formed, which points radially (i.e., its extension intersects the annular engagement region 6a) and forms an acute angle (e.g., 45°) with the direction of the straight side 22e of the gripping protrusion 22: as Figure 3 As shown in the diagram (which shows the support from the bottom), the fold line 22c (and thus the second straight side 22e' that grips the outer edge of the protrusion) and the straight side 22e can converge and connect in a manner corresponding to a corner, wherein the protrusion can take a rounded shape (the corner can, of course, be rounded or pointed or take any other desired shape, depending on the need).

[0219] Alternatively, in Figures 11 to 15In this embodiment, the fold line 22c does not point radially (i.e., its extension will not intersect the annular engagement region 6a), but rather has a preferred straight shape, which is part of the perimeter 3. Specifically, in the illustrated case of a support with a flange having a polygonal perimeter 3, the outer edge of the gripping protrusion forms a straight side precisely at the fold line 22c, which connects the end ends of two consecutive side edges of the flange 6. In practice, according to this alternative, the straight side at the fold line 22c is the only portion shared by the outer edge of the gripping protrusion 22 and the perimeter 3. Indeed, when the second portion 22b folds along the fold line 22c over the first portion 22a, the remaining portion of the outer edge of the gripping portion extends within the region of the flange 6.

[0220] From a structural perspective, the gripping protrusion 22 includes the aforementioned fold line 22c, which thus integrally connects the first portion 22a to the second portion 22b, such that the second portion 22b folds over the first portion 22a around the fold line 22c, which remains the connecting line between the first and second portions. Alternatively, the second portion 22b can be folded and the strip of material at the fold line 22c removed, such that the first and second portions remain connected solely by any engagement between their mutually facing surfaces. In a further alternative, the second portion 22b may form a cutout from the flange 6 and be positioned onto the first portion 22a as described above, again where the connection between the first and second portions is achieved by any engagement between their mutually facing surfaces. In any case, the gripping protrusion 22 is integral part of the peripheral flange 6 of the support 1, and when present, the fold line 22c defines a portion of the outer perimeter 3 of the peripheral flange 6. Again, from a structural perspective, the first and second portions of the gripping protrusion 22 are made of the same material as the support 1 and are specifically derived from the flange 6. More specifically, according to a preferred embodiment, the base wall 8, side walls 7, and flange 6 can be formed as a single piece by plastically deforming the same substrate (particularly by thermoforming), the substrate being, for example, in the form of a plastic web or foil. Thus, the base 2, side walls 7, peripheral flange 6, and gripping protrusion 22 form a single solid body made of plastic material.

[0221] exist Figures 1 to 10In the first embodiment shown, the fold line 22c is distinct from and continuous with the straight side 22e of the peripheral edge 22d of the gripping protrusion 22: specifically, the straight side 22e is part of the outer perimeter 3 of the flange 6 and defines an acute angle with the fold line 22c at the tip of the corner portion of the support 1. The fold line 22c extends transversely to the receiving compartment 5 and the annular engagement region 6a: specifically, the fold line 22c (and therefore the side 22e') extends from the radially outermost portion of the peripheral edge 22d of the gripping protrusion 22 to the annular engagement region 6a of the peripheral flange 6.

[0222] According to the first embodiment, the second part 22b is obtained by forming a separation line or cutting line 9 on the outer flange 6: Note that the separation line 9 may not necessarily be a true cutting line, but merely a cut or line that facilitates separation, for example by means of a series of separation points or thickness reduction points or a cut through the wall of the flange 6; the separation line 9 is transverse and extends to the fold line 22c. Figure 9 A first embodiment is shown, prior to the folding step where the first portion 22a folds over the second portion 22b, wherein the separation line 9 is preferably perpendicular to the folding line 22c. The separation line 9 can be defined by a cutting tool (such as a blade or stamping tool). Alternatively, the separation line 9 can initially be formed by a weakening line that facilitates subsequent separation. Once the separation line 9 has been formed, the separation edge 9a of the second portion 22b of the gripping protrusion is also formed: in particular, the separation edge 9a of the second portion 22b is continuous with the folding line 22c. The gripping protrusion 22 is then completed by folding the second portion 22b over the first portion 22a around the folding line 22c and by thermally bonding the first and second portions together. In possible alternatives, the second portion 22b can be folded over the first portion 22a around the folding line 22c without then thermally bonding the first and second portions together (thus the two portions remain in simple contact, one folded over the other), or thermal bonding of the first portion 22a and the second portion 22b can occur when the closure film is thermally bonded to the support.

[0223] According to the first embodiment, the second portion 22b of the gripping protrusion 22 is defined by the fold line 22c, the side 22d, and the separation edge 9a, thereby defining a triangular shape, which preferably has a right angle between the fold line 22c and the separation edge 9a or the separation line 9. Therefore, in this case, the fold line 22c and the separation line 9 are part of the outer perimeter of the peripheral flange 6.

[0224] Using the forming process described above for the gripping protrusion, a cutout portion is formed on the peripheral flange 6 adjacent to the gripping protrusion 22 and having the shape of a second portion 22b: the cutout portion defines a recess 20 in the outer periphery 3 of the peripheral flange 6. Figure 2 and Figure 10 As shown, the recess 20 has the same shape as the gripping protrusion 22 and forms the outline of the outer perimeter 3 adjacent to the gripping protrusion, which facilitates the user to grip the gripping protrusion.

[0225] According to the first embodiment, the flaps 10c of the sealing film completely cover the gripping protrusion 22: specifically, the flaps extend to and preferably not beyond the side 22d of the gripping protrusion 22. Additionally, the flaps 10c extend beyond the fold line 22c, thereby covering the cut-out portion of the peripheral flange 6 and the recess 20. In other words, according to the first embodiment, the flaps 10c cover all (or at least the main portion) of the gripping protrusion 22 and the cut-out portion and therefore the recess 20: thus, the covering portion of the flaps 10c is arranged above the cut-out portion / recess 20 and does not extend above any part of the peripheral flange 6, thus resulting in easy identification and easy gripping. In other words, when opening the packaging, the user can easily grasp the covering portion of the flaps 10c, which is not attached to the portion below the flange 6: therefore, the presence and specific location of the recess 20 facilitates the user opening the packaging. Again, referring to the configuration of the first embodiment, the sealing membrane 10 thus covers the peripheral flange 6 at least corresponding to the annular bonding region 6a and includes a sealing membrane perimeter that is opposite in shape to the outer perimeter of the peripheral flange 6, except for the portion of the perimeter of the peripheral flange 6 described at the cut-out portion: in fact, corresponding to the cut-out portion, the perimeter of the peripheral flange 6 forms a recess 20, while the sealing membrane 10 does not form any recess and extends above the cut-out portion.

[0226] according to Figures 11 to 15 The second embodiment shown obtains the gripping protrusion 22 (as already mentioned) by folding the corner portion of the peripheral flange 6 over the inner portion of the flange: in this case, the second portion 22b may have a triangular shape or alternatively a trapezoidal shape. According to this second embodiment, the gripping protrusion 22 is externally defined only by a fold line 22c, which defines a portion of the outer perimeter 3 of the peripheral flange 6. More specifically, the fold line 22c may connect the first side edge and the second side edge of the flange 6, and preferably, may form the same angle with the first side edge and the second side edge of the flange. The first portion 22a and the second portion 22b of the gripping protrusion may be joined together by means of thermal bonding, or as... Figure 15 The diagram illustrates the use of a certain amount of glue 30 between the two parts, or other techniques (not excluding the simple use of mechanical connection between the two parts).

[0227] In example Figure 17In the third embodiment shown, the gripping protrusion 22 may not include the fold line 22c. Specifically, the fold line 22c described according to both the first and second embodiments may be cut off along the cutting line TL, as... Figure 16 As schematically shown, for example, by a blade or other tool. Therefore, in the third embodiment, the first portion 22a and the second portion 22b are integral with each other, but connected at their respective inner sides by, for example, a thermal bonding process, in order to define the gripping protrusions of a single body. In this case, the cutting line TL defines the side 22d of the gripping protrusion 22 as part of the outer perimeter 3 of the peripheral flange 6.

[0228] The sealing film 10 (and in particular the flap 10c) is arranged above the gripping protrusion 22 and parallel to it at least when the package is closed; in the closed state, the second surface 10b of the flap 10c faces the outside of the second portion 22b of the gripping protrusion 22: in detail, the flap 10c can contact the outside of the second portion 22b of the gripping protrusion 22, but is not engaged with the outside of the second portion 22b, so that the user can raise the flap from the gripping protrusion and tilt it relative to the surface of the peripheral flange 6.

[0229] The wing 10c preferably completely covers the gripping protrusion without extending beyond the peripheral edge 22d of the gripping protrusion: in other words, in the preferred embodiment, the wing 10c extends to the peripheral edge 22d of the gripping protrusion 22. Alternatively, the wing 10c may extend beyond the peripheral edge 22d of the gripping protrusion 22, thus exposing itself relative to the outer perimeter 3 of the peripheral flange 6.

[0230] As can be seen from the accompanying drawings, the flap 10c is exclusively made of the top membrane and optionally formed from the corner portion of the top membrane. In practice, when the flap is operated (i.e., lifted relative to the flange), no part of the flange 6 and under no circumstances will any part of the support 1 separate from the flange and remain attached to the flap 10c. This allows for a maximized gripping area because no flange material becomes part of the flap when the flap itself is lifted from the outer flange 6 to open the package 100.

[0231] Again, referring to the accompanying drawings, it is possible to understand how the gripping protrusion presents the size of each of its top and bottom surfaces (i.e., a measure of the area of ​​the top surface of the gripping protrusion and a measure of the area of ​​the bottom surface of the gripping protrusion 22), which is essentially half or at least 40% of the surface area of ​​the top or bottom surface of the wing.

[0232] The process of making the packaging 100

[0233] Another object of the present invention is a process for making packaging 100 according to any of the appended claims and / or according to the description given above.

[0234] The process described below can be performed using the equipment 300 described in the next chapter.

[0235] It should also be noted that, according to a further aspect of the invention, the various method steps described below can be implemented in the control unit 311 (see...). Figure 18 The process is carried out under the control of a control unit that acts on suitable actuators and / or motors and / or pumps and / or valves to perform the various steps described and command the movement of various moving parts. The control unit may further be used to control suitable vacuum sources or gas sources to control gas suction and / or injection into the packaging chamber used during the formation of the packaging 100.

[0236] The process includes the step of forming the support 1 from a substrate in the form of a web or foil of a plastic material as described above, the substrate having first and second opposing surfaces 1a, 1b, as described.

[0237] The step of forming support 1 may further include the step of thermoforming the substrate at thermoforming station 308 to define the bottom wall 8, the peripheral flange 6, and the side wall 7. In practice, several supports are formed and advanced from the thermoforming station to the packaging station.

[0238] like Figure 18 As shown, the process may include the step of moving a substrate along a predetermined forward path A: as mentioned, the substrate may be a continuous web 200 of plastic material unwound from a reel 301.

[0239] The continuous plastic web 200 preferably has a first surface 1a, which is heat-sealable to a plastic material for forming a plastic film 10, which will be applied to each of the supports 1; on the other hand, the continuous plastic web 200 has a second surface 1b, which is not or almost not heat-sealable to the plastic material for forming the plastic film 10. The process envisions thermoforming multiple semi-finished supports 1c on the continuous web 200, such as... Figure 19 As shown in the diagram. The process then includes a subsequent cutting step to define the outer perimeter 3 of each support 1 on the web 200 and, according to the first embodiment, a corresponding separation line 9. The cutting step can be performed at the slotting station 306 of the packaging equipment, for example by means of a cutting tool or a stamping tool.

[0240] Alternatively, multiple supports can be supplied in the form of discrete foils or discrete trays: in this case, the outer perimeter 3 of the support may already be defined. In any case, the process can still include a cutting step for defining a separation line 9 on the support to form the second portion 22b of the gripping protrusion 22 according to the first embodiment. Of course, if the obtained Figure 11-15The type of tray shown does not form a separation line 9.

[0241] The process further includes the step of forming the gripping protrusion 22 by folding the second portion 22b around the fold line 22c to bring the second portion 22b into an overlapping position above the first portion 22a, as shown below. Figure 10 and Figure 12 The steps of forming the gripping protrusion 22 include applying a thrust to the second surface 1b of the second portion 22b toward the first surface of the first portion 22a until the inner side of the first portion 22a contacts the inner side of the second portion 22b.

[0242] The process may also include a step of joining the first portion 22a with the second portion 22b of the gripping protrusion 22: specifically, this step includes thermally bonding the inner side of the first portion 22a of the gripping protrusion 22 with the inner side of the second portion 22b. More specifically, the thermal bonding step includes pressing the second portion 22b onto the first portion 22a and providing a heat source to allow welding of these inner sides. Alternatively, as Figure 15 As shown, a certain amount of glue can be added between the first part 22a and the second part 22b: although according to the second embodiment in Figure 15 The alternative is shown in the figure, but it can also be applied to the production of Figure 1-10 The packaging process of the first embodiment.

[0243] The process further includes the step of positioning at least one product P on the base 2 of the support 1. Once the product is positioned on the base 2, the process includes the step of constraining the sealing film 10 to the annular engagement area of ​​the peripheral flange 6 to form the receiving compartment 5. The step of constraining the sealing film 10 to the support 1 includes the step of heat-sealing the film impermeably to the annular engagement area 6a of the support. The step of constraining the sealing film 10 to the corresponding one or more supports follows the step of forming the gripping protrusion 22 by folding the second portion 22 onto the first portion, and obviously also follows the step of positioning the product on the support 1.

[0244] The process may also include the step of removing gas (particularly air) from the containing compartment 5 to define the vacuum skin package 100: this gas removal step precedes the step of constraining the sealing film 10 to the annular bonding area 6a of the support.

[0245] Alternatively, the process may include the step of filling a gas (particularly an inert gas) into the receiving compartment 5 to define the controlled atmosphere package 100: this gas filling step also precedes the step of constraining the sealing film 10 to the annular bonding region 6a. In a variant, the process may include the two steps of removing gas from the receiving compartment 5 and subsequently filling the receiving compartment 5 with a different gas.

[0246] Equipment for making the packaging

[0247] Figure 18 The apparatus 300, schematically shown, is configured to perform the processes claimed and / or described above for making packaging 100.

[0248] The equipment 300 may include a plurality of operating stations arranged sequentially to define a production line, each of which is configured to perform a predetermined operation to obtain package 100 at the output of the production line. The various operating stations of the equipment 300 are described below in sequence according to the processing steps.

[0249] Device 300 includes at least one frame configured to support one or more operator stations and ensure stability during operation steps. Device 300 further includes... Figure 18 The first supply assembly 301 shown is configured to provide a continuous web 200 and set it along the production line such that it extends smoothly through the plurality of operating stations. The first supply assembly 301 provides the continuous web wound on a spool that can be rotated, specifically, the spool can: a) be moved by an electric motor, b) be braked, or c) rotate freely.

[0250] The continuous web moves along a predetermined advance path A by a conveyor 302 that joins it to the frame (in Figure 18 The presence of (shown in the diagram) ensures this. Conveyor 302 includes a belt driven by one or more electric motors and is configured to support the continuous web 200. Alternatively, conveyor 302 may include a system for laterally hooking the continuous web 200 by means of clamps.

[0251] Downstream of the first supply group 301 of the continuous web, the equipment 300 may include at least one thermoforming station 308 configured to define a semi-finished support 1c on the continuous web 200. Specifically, the thermoforming station is provided to define a semi-finished support shaped into a tray comprising a bottom wall 8 and side walls 7. The thermoforming station 308 provides a predefined temperature for heating the plastic continuous web to a level sufficient to deform the web and impose a desired shape (e.g., by the action of a mold) onto the support 1. Specifically, the thermoforming station 308 may have: an upper tool that operates above the continuous web; and a lower tool having a concave mold positioned below the continuous web. The upper and lower tools of the thermoforming station 308 are movable relative to each other and are configured to be arranged in at least a spaced-apart state and at least a near-closed state. In the spaced-apart state, the upper and lower tools allow the continuous web to be introduced into the thermoforming station 308, and in the near-closed state, the upper and lower tools define a forming chamber. In the near-closed state, the lower tool provides gas suction below the web to allow the sufficiently heated continuous web to adhere to the wall of the mold present in the lower tool, thus obtaining a plurality of semi-finished supports of the desired shape. Downstream of the thermoforming station 308, a plurality of thermoformed semi-finished supports 1c connected together are then defined on the continuous web 200. In the case of a flat support 1 (not shown in the figures), the packaging equipment 300 may not include the thermoforming station 308. It should also be noted that while a thermoforming station using suction to form a continuous web against a mold is described, other types of molding systems are not excluded, such as those in which the tools have convex and concave shapes respectively, which together form a (multiple) of semi-finished supports of the desired shape when brought close together, as is known to those skilled in the art.

[0252] In an additional alternative embodiment, several separate preformed pallet supports 1 may be supplied: in this case, the packaging equipment 300 does not include the thermoforming station 308.

[0253] Downstream of supply group 301, equipment 300 includes Figure 18 The grooving station 306 shown is configured to cut or weaken the thermoformed continuous web to define at least a portion of the gripping protrusion 22. In particular, the grooving station 306 is configured to define the outer edge of a second portion 22b of the gripping protrusion and optionally a separation line 9.

[0254] The device 300 further includes a folding station 305 configured to perform a folding step on the first portion 22a of the gripping protrusion 22. The folding station 305 may include a lower pushing tool acting on the lower surface of the continuous web on the second portion 22b; an upper pushing tool may also be provided to complete the folding step. Additionally, the lower and / or upper pushing tools may include a heat source and are thus configured to supply heat to the first portion 22a and the second portion 22b under the control of a control unit to ensure they are thermally bonded (however, as explained above, in a variant, the first portion 22a and the second portion 22b may simply be folded so that one is on top of the other without thermal bonding).

[0255] although Figure 18 The examples illustrate a slotting station 306 and various folding stations 305, but it should be noted that the device 300 may include a single station combining the functions of stations 305 and 306 and thus having at least one tooling configured to cut a continuous web in place to form a second portion 22b. This tool is also configured to bend the second portion upwards relative to the remainder of the flange 6 and then further fold the second portion in a certain manner to bring it above and parallel to the first portion. The tool may optionally be heated to thermally bond the second portion 22b to the first portion 22a.

[0256] Note that in Figure 18 The diagram shows that the separation of the support from the continuous web 200 occurs after the application of the sealing film 10, i.e., after the packaging station described below. However, it is not excluded that the finished support may have been obtained after the folding station 305.

[0257] The device 300 further includes a positioning station 304 configured to place a plurality of products P on a suitable area of ​​a semi-finished product support 1c or support 1, specifically corresponding to the base 2. The positioning station 304 is configured to deliver the products P based on the position of the support relative to the positioning station. Specifically, position sensors may be provided to monitor the position of the support on the conveyor 302 and communicate corresponding positioning signals to a control unit, which may then be configured to command the delivery of the products by the positioning station based on the positioning signals.

[0258] After the positioning station 304 follows the forward path A relative to the continuous web 200 (i.e., in the attached...), Figure 18 Downstream of the equipment 300, the equipment 300 includes a second supply component 303 (refer again to...). Figure 18The second supply assembly is configured to supply the sealing film 10 and to position it on the web 200. The second supply assembly 303 unwinds the sealing film 10 from a reel driven by an electric motor or by the pulling action of the film 10 (note that no motor acts on the reel, which can rotate freely or it can be controlled by a brake to keep the film under a certain tension).

[0259] Downstream of the second supply assembly 303 along the forward path A relative to the continuous web 200, the device 300 includes a packaging station 307 configured to receive the web 200 on which one or more products P are placed, and at least a portion of the sealing film 10 aligned above a given number of the supports 1 or semi-finished product supports 1c. The packaging station 307 is configured to fluid-impermeably bond the sealing film 10 to the continuous web 200; specifically, the packaging station secures the sealing film to the underlying support(s)(s)(s)(s)(s)(s)(s)) at least at the annular engagement region of the flange 6 of each support 1 or semi-finished product support 1c. To ensure fluid-impermeable bonding, the packaging station 307 includes: an upper tool 307a having a heater configured to at least heat the sealing film 10; and a lower tool 307b configured to receive one or more supports 1 or semi-finished product supports (1c). The upper tool 307a is configured to heat-seal the sealing film 10 to the underlying semi-finished product support 1c or support(s) 1 to define a receiving compartment 5 for product P. More specifically, the upper tool 307a and the lower tool 307b are movable relative to each other between at least one spaced-out state and at least one near-closed state. In the at least one spaced-out state, the upper tool 307a and the lower tool 307b allow proper positioning of the sealing film 10 and the semi-finished product support(s) or support(s), and in the at least one near-closed state, the upper tool 307a and the lower tool 307b provide heat sealing of the sealing film at least at the annular engagement area 6a of each support or semi-finished product support. In the near-closed state, where it is necessary to form a vacuum packaging and / or generate a controlled atmosphere in the packaging, the upper and lower tools of the packaging station 307 may also define a chamber, such as a fluid-impermeable chamber.

[0260] As described above, due to the presence of non-heat-sealable material, the seal only occurs between the sealing membrane and the flange 6, while there is no (or very limited) bonding between the sealing membrane and the gripping protrusion 22.

[0261] Packaging station 307 may be provided with a suction system configured to remove air from the interior of packaging station 307 to limit pressure below atmospheric pressure and facilitate the formation of vacuum skin packaging. In a further embodiment, packaging station 307 is configured to remove air from receiving compartment 5 when the sealing film 10 is fluid-impermeablely bonded to continuous web 200. Optionally, packaging station 307 may be provided with a blowing system configured to inject gas into packaging station 307 to obtain a modified atmosphere environment.

[0262] Figure 18 The plurality of semi-finished product supports 1c are schematically shown being closed by a sealing film 10 exiting from packaging station 307.

[0263] Downstream of the packaging station 307 relative to the forward path A of the web 200, the equipment 300 includes a separation station 309 configured to make multiple cuts through the web 200 and the sealing film 10 to divide the semi-finished support 1c and corresponding portions of the sealing film to obtain multiple packages 100. These cuts can be made using a punch with a pre-defined cutting section. Alternatively, these through cuts are made by means of a cutting tool, a rotating blade, or a high-intensity focused beam of the laser type. These through cuts also define the remainder of the outer perimeter 3 of each support 1 (e.g., ...). Figure 19 (as shown in the diagram) and optionally the outer edge of the first portion 22a of the gripping protrusion 22.

Claims

1. A package (100) containing at least one product (P), said package comprising: At least one support member (1) includes: ○ At least one base (2) that receives the at least one product (P). ○ The peripheral flange (6) surrounds the base (2) and forms at least one gripping protrusion (22). The support member (1) is formed of a substrate having a first surface (1a) and a second surface (1b) opposite to the first surface (1a); and A sealing film (10) engages with at least a portion of the peripheral flange (6) and together with the support (1) defines a receiving compartment (5) for the product (P), the sealing film (10) being configured to at least partially separate from the support (1) during the step of opening the package (100) to allow access to the receiving compartment (5). The gripping protrusion (22) includes at least: The first part (22a) of the support member (1) carries a corresponding part of the first surface (1a) and a corresponding part of the second surface (1b). The second part (22b) of the support member (1) carries a corresponding portion of the first surface (1a) and a corresponding portion of the second surface (1b). The second part (22b) is positioned in an overlapping position above the first part (22a), wherein the portion of the first surface (1a) carried by the first part (22a) faces the corresponding portion of the first surface (1a) carried by the second part (22b), and wherein the portion of the second surface (1b) carried by the first part (22a) and the portion of the second surface (1b) carried by the second part (22b) form the opposite outer sides of the gripping protrusion (22). The outer edge (22d) is part of the radial outer perimeter (3) of the outer flange (6). In the closed state of the packaging, the sealing film (10) forms a flap (10c), which is configured to be grasped by a user to bring the packaging from the closed state to at least a partially open state, in which the sealing film (10) is at least partially separated from the support member (1) to allow access to the receiving compartment (5), and In the packaged closed state where the flap (10c) is parallel to the peripheral flange (6), the peripheral edge (22d) of the gripping protrusion (22) is part of the radial outer perimeter (3) of the peripheral flange (6), and The wing (10c) has a free portion that does not cover the gripping protrusion (22) and the peripheral flange (6), extends above the recess (20) in the perimeter (3) of the peripheral flange (6), and can be directly operated by the user.

2. The packaging according to claim 1, wherein, The wing (10c) configured to be gripped by the user is an integral part of the closure membrane (10) and is exclusively made of a portion of the closure membrane (10).

3. The packaging according to claim 1, wherein, The wing (10c) configured to be gripped by the user does not include any part of the support (1).

4. The packaging according to claim 1, wherein, The package (100) is configured to define a pre-opened state, wherein: a. The sealing membrane (10) and the support (1) prevent access to the receiving compartment (5). b. The flaps (10c) of the closure membrane (10) are raised at least partially from the gripping protrusion (22) so that the gripping protrusion (22) can be operated by the user.

5. The packaging according to claim 4, wherein, In the pre-open state, the sealing membrane (10) is stably engaged with the peripheral flange (6) to define a fluid-impermeable containment compartment (5) for the product (P).

6. The packaging according to claim 4, wherein, When the package is in the pre-opened state and the flap is raised from the gripping protrusion (22), the flap (10c) is exclusively made of a portion of the sealing film material.

7. The packaging according to claim 6, wherein, The wing (10c) does not bear any part or material of the support (1).

8. The packaging according to claim 1, wherein, The free portion of the wing has the same shape as the gripping protrusion (22).

9. The packaging according to claim 1, wherein, The peripheral flange (6) includes a cutout portion adjacent to the gripping protrusion (22) and having the shape of the second portion (22b). The cutout portion defines the recess (20) in the outer perimeter (3) of the peripheral flange (6) to have the same shape as the gripping protrusion (22), or the same shape and the same size.

10. The packaging according to claim 1, wherein, When viewed from above the packaging, the outer perimeter (3) of the outer flange (6) has a convex shape.

11. The packaging according to claim 9, wherein, When viewed from above the packaging, the outer perimeter (3) of the outer flange (6) has a convex shape, except that the perimeter is positioned by the portion of the recess (20).

12. The packaging according to claim 1, wherein, When the package is opened and the sealing film (10) is completely removed from the support (1), no part of the support (1) will be removed from the support due to the opening.

13. The packaging according to claim 1, wherein, The thermal bonding properties of the second surface (1b) to the sealing film (10) are different from those of the first surface (1a) to the same sealing film.

14. The packaging according to claim 1, wherein, The second part (22b) is connected to the first part (22a).

15. The packaging according to claim 14, wherein, The second part (22b) is thermally bonded to the first part (22a).

16. The packaging according to claim 1, wherein, The peripheral edge (22d) of the gripping protrusion (22) is formed by overlapping the peripheral edges of the first portion (22a) and the second portion (22b).

17. The packaging according to claim 1, wherein, In the closed state of the packaging, the sealing film (10) is at least airtightly engaged with the annular engagement area (6a) of the peripheral flange (6) so as to airtightly seal the receiving compartment (5) and isolate it from the external environment outside the receiving compartment (5). and The annular bonding region (6a) surrounds and completely encloses the receiving compartment (5), and the annular bonding region (6a) is part of the first surface (1a).

18. The packaging according to claim 17, wherein, The sealing film (10) is thermally bonded to the annular bonding area (6a) of the peripheral flange (6) and thermally bonded to the first surface (1a) of the support member that is not occupied by the product (P).

19. The packaging according to claim 1, wherein, The second part (22b) is connected to the first part (22a) at the fold line (22c), and the second part (22b) is folded over the first part (22a) around the fold line (22c).

20. The packaging according to claim 19, wherein, The peripheral edge (22d) of the gripping protrusion (22) and the perimeter (3) includes one side (22e') extending along the fold line (22c).

21. The packaging according to claim 20, wherein, The fold line (22c) extends from the outermost radial portion of the peripheral edge (22d) of the gripping protrusion (22) to the annular engagement region (6a).

22. The packaging according to claim 1, wherein, The first surface (1a) of the support member (1) is configured to be heat-sealed to the sealing film (10) at a heat-bonding temperature between 140°C and 240°C, while the second surface (1b) of the support member (1) is configured not to be heat-sealed to the sealing film at the heat-bonding temperature.

23. The packaging according to claim 22, wherein, The substrate comprises a multilayer structure having: at least one top layer film made of a material heat-sealed to the sealing film (10) at the heat-bonding temperature; and at least one bottom layer film made of a material not heat-sealed to the sealing film (10) at the heat-bonding temperature.

24. The packaging according to claim 1, wherein, The support member (1) is in the shape of a generally rectangular, square or triangular shape, wherein the gripping protrusion (22) is arranged at the corner area of ​​the support member (1).

25. The packaging according to claim 24, wherein, The peripheral flange (6) has a perimeter having a straight side that converges at the corner area of ​​the support.

26. The packaging according to claim 24 or 25, wherein, The second part (22b) is connected to the first part (22a) at the fold line (22c), the second part (22b) is folded over the first part (22a) around the fold line (22c), and wherein the fold line (22c) extends to the tip of the corner region of the peripheral flange (6) of the support (1).

27. The packaging according to claim 1, wherein, The gripping protrusion (22) is an integral part of the peripheral flange (6) of the support member (1).

28. The packaging according to claim 1, wherein, In the closed state of the packaging, the sealing film (10) is not bonded to the outside of the gripping protrusion (22) and forms the flap (10c).

29. The packaging according to claim 17, wherein, In the closed state of the packaging, the sealing film (10) is bonded to the outside of the gripping protrusion (22) in a weaker manner than it is bonded to the annular bonding region (6a) and forms the flap (10c).

30. The packaging according to claim 1, wherein, in the closed state, the flap (10c) extends radially outward above the gripping protrusion (22) into the annular engagement region (6a), wherein, A portion of the annular bonding region (6a) is radially inserted between the wing (10c) and the receiving compartment (5).

31. The packaging according to claim 1, wherein, In the closed state of the packaging, the sealing film (10) and the flap (10c) extend beyond the peripheral edge (22d) of the gripping protrusion (22) and beyond the perimeter (3) of the peripheral flange (6) only in correspondence with the recess (20).

32. The packaging according to claim 1, wherein, In the closed state of the package (100), the flap (10c) covers at least a major portion of the top surface of the gripping protrusion (22) and at least a major portion of the retracted portion (20).

33. The packaging according to claim 1, wherein, In the closed state of the package (100), The outer side of the gripping protrusion (22) is not bonded to the bottom surface of the wing (10c) or is bonded to the bottom surface of the wing (10c) in a weaker manner than the bond between the sealing membrane and the annular bonding area, and the outer side of the gripping protrusion (22) faces directly to the bottom surface of the wing (10c) of the sealing membrane (10).

34. The packaging according to claim 1, wherein, The surface area of ​​each of the outer sides of the gripping protrusions (22) is at least 40% of the top surface area of ​​the wing (10c).

35. The packaging according to claim 1, wherein, The first surface (1a) of the support member (1) defines the inner sides of the first portion (22a) and the second portion (22b) of the gripping protrusion (22), the inner side of the first portion (22a) directly facing the inner side of the second portion (22b) of the gripping protrusion (22); The inner side of the first portion (22a) of the gripping protrusion (22) is coupled to the inner side of the second portion (22b) of the gripping protrusion (22); Furthermore, the inner side of the first portion (22a) of the gripping protrusion (22) is coplanar with the outer flange (6) of the support member (1).

36. The packaging according to claim 19, wherein, The fold line (22c) of the gripping protrusion (22) defines a section of the outer perimeter (3) of the peripheral flange (6).

37. The packaging according to claim 36, wherein, When the packaging is in the closed state, the main part of the fold line (22c) is covered by the flaps (10c) of the sealing film (10).

38. The packaging according to claim 37, wherein, When the packaging is in the closed state, the entire fold line (22c) is covered by the flaps (10c) of the sealing film (10).

39. The packaging according to claim 19, wherein, The fold line (22c) of the gripping protrusion (22) extends laterally to the immediate continuous portion of the outer perimeter (3) of the flange (6) of the support (1).

40. The packaging according to claim 39, wherein, The fold line (22c) of the gripping protrusion (22) extends in a direction transverse to the receiving compartment (5) of the package (100).

41. The packaging according to claim 1, wherein, The first portion (22a) and the second portion (22b) of the gripping protrusion (22) are identical overlapping portions that are in close contact with each other.

42. The packaging according to claim 19, wherein, The fold line (22c) extends in a straight line between a first end and a second end, the first end being closer to the receiving compartment (5) than the second end, wherein the flap (10c) of the sealing membrane (10) extends to and beyond the first end of the fold line (22c).

43. The packaging according to claim 42, wherein, The flap (10c) of the closure membrane (10) extends to the second end of the fold line (22c), and wherein the flap (10c) covers the first end of the fold line (22c).

44. The packaging according to claim 19, wherein, The gripping protrusion (22) is substantially triangular in shape.

45. The packaging according to claim 1, wherein, The wing (10c) is an integral part of the sealing membrane and is made of the same plastic material as the rest of the sealing membrane (10), and the wing (10c) is substantially triangular in shape.

46. ​​The packaging according to claim 19, wherein, The second part (22b) is obtained in the following manner: A separation line (9) is formed on the outer flange (6), and The second part (22b) is folded onto the first part (22a) around the fold line (22c), and the separation line (9) is transverse to the fold line (22c).

47. The packaging according to claim 46, wherein, The second portion (22b) of the gripping protrusion (22) is defined by the following: the separation edge (9a) formed by the separation line (9), the fold line (22c), and a portion of the outer perimeter (3) of the peripheral flange (6).

48. The packaging according to claim 9, wherein, Most or all of the cut-out portion extends below the wing (10c) when the package is closed.

49. The packaging according to claim 47, wherein, The separating edge (9a) of the second portion (22b) is transverse to the fold line (22c); and wherein the separating edge (9a) of the second portion (22b) is continuous with the fold line (22c).

50. The packaging according to claim 9, wherein, Most or all of the cut-out portion extends below the flap (10c) when the package is closed, and wherein the separating edge (9a) of the second portion (22b) is transverse to the fold line (22c); and wherein the separating edge (9a) of the second portion (22b) is continuous with the fold line (22c), and wherein the sealing film (10) covers the peripheral flange (6) at least corresponding to the annular bonding area (6a) and has a sealing film perimeter that is opposite in shape to the outer perimeter (3) of the peripheral flange (6), except for a portion of the perimeter of the peripheral flange at the cut-out portion, and wherein, corresponding to the cut-out portion, the perimeter of the peripheral flange forms a recess (20), while the sealing film does not form any recess and extends above the cut-out portion.

51. The packaging according to claim 1, wherein, The second surface (1b) of the substrate defining the support (1) comprises a coating of a non-heat-sealable material, the coating being configured to prevent the gripping protrusion (22) from bonding with the sealing membrane (10); wherein the coating is made of or includes at least one of the following: wax; High-melting-point thermoplastic resin or resin that is chemically incompatible with the sealing layer of the sealing film; Thermosetting resins; Smooth or embossed paper; Ink or paint; Metal.

52. The packaging according to claim 1, wherein, The sealing membrane (10) is made entirely of plastic material, and the winglets (10c) form only a portion of the membrane.

53. A process for manufacturing a package (100) for containing at least one product (P) according to claim 1, said process comprising at least the following steps: Provide one or more of the support members (1), Position at least one product (P) on the base (2) of each support (1). The sealing membrane (10) is constrained to the peripheral flange (6) of each support (1) to form the corresponding receiving compartment (5), and the product (P) is positioned in the receiving compartment (5).

54. The process according to claim 53, wherein, Providing the one or more supports includes providing the substrate having first and second opposing surfaces (1a, 1b) and forming one or more supports (1) using the substrate; further wherein the process includes forming the gripping protrusion (22) by bringing the second portion (22b) into an overlapping position over the first portion (22a).

55. The process according to claim 54, wherein, The second part (22b) of the package is connected to the first part (22a) at the fold line (22c), and the second part (22b) is folded over the first part (22a) around the fold line (22c), wherein the step of forming the gripping protrusion (22) by bringing the second part (22b) into the overlapping position over the first part (22a) includes folding the second part (22b) around the fold line (22c).

56. The process according to claim 55, wherein, The second part (22b) is obtained in the following manner: A separation line (9) is formed on the outer flange (6), and The second part (22b) is folded onto the first part (22a) around the fold line (22c), and the separation line (9) is transverse to the fold line (22c).

57. The process according to claim 56, wherein, Bringing the second part (22b) to the overlapping position above the first part (22a) is after the step that defines the separation line (9).

58. The process according to claim 53, comprising the step of connecting the first portion (22a) of the gripping protrusion (22) to the second portion (22b) of the gripping protrusion (22), the connecting step comprising combining the first portion (22a) and the second portion (22b), the connecting step comprising thermally bonding the inner side of the first portion (22a) to the inner side of the second portion (22b).

59. The process according to claim 53, wherein, The step of constraining the sealing membrane (10) to the support member (1) includes the step of heat-sealing the sealing membrane (10) to the annular bonding region (6a) of the support member (1) in a fluid-impermeable manner to define a fluid-impermeable receiving compartment (5), wherein the step of constraining the sealing membrane (10) to the annular bonding region (6a) is after the step of forming the gripping protrusion (22).

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