RU215600U1 - Automatic locking carton lid for rectangular container with external flange at the corners - Google Patents

Abstract

The utility model relates to the field of manufacturing packaging from pulp and paper material, mainly for food products, more specifically, to packaging products, namely to packaging structures representing a rectangular cover made by cutting a blank from a sheet of pulp and paper material, pre-formed along the lines fold. Rectangular cardboard cover is made of sheet pulp and paper material and assembled from a development along the fold lines into the shape of a volumetric regular truncated pyramid, expanding downwards, containing a viewing window made of film material, made on the upper surface of the central part of the cover, side wall tuck, locking corner elements of the automatic fixing the lid for fastening on the outer flange of the container, with an adjacent adhesive edge, while the side wall material is turned inside the lid to a height less than the height of the main wall by an amount equal to the height of the outer flange of the container, and the lid is delivered in a flat form. The utility model makes it possible to reduce the assembly time of the lid both in the bulk state and in the flat state. 8 ill.

Description

Technical field

This utility model relates to the field of manufacturing packaging from pulp and paper material, mainly for food products, more specifically, to packaging products, namely to packaging structures representing a rectangular lid made by cutting a blank from a sheet of pulp and paper material, preformed according to fold lines in a special way so that as a result, the resulting package receives consumer properties that are superior to the prior art.

State of the art

Products known from the prior art, made from pulp and paper materials, cannot be prepared for use in a quick way or cannot be securely fixed (have locks that prevent spontaneous opening) on rectangular cardboard containers or have a large storage volume due to bulky transport condition, which creates problems during transportation, storage and use of packaging.

Currently, catering establishments, restaurants, cafes, grocery stores have a need to use pulp and paper packaging with a viewing window option for their products instead of plastic containers. So, as such packaging, various kinds of containers, boxes, containers are used, in which food products and dishes are offered to the end consumer. The packaging arriving at the place of its use should arrive in a flat state, which can significantly save space during transportation and storage, as well as not require a long assembly time or special skills of workers. In addition, in the case of considering individual containers for containers, they must be securely fixed to the container and endure deformations during the transport of the contents.

Thus, there is a need for a package (i) having a design that can be securely and quickly attached to rectangular containers; (ii) supplied ready assembled; (iii) delivered flat for efficient delivery; (iv) having the option of a viewing window; (v) in various sizes and types.

The introduction of unique packaging design features is aimed at expanding the scope of applications and attracting a mass buyer. As a rule, high-quality packaging in which food products are offered increases the final cost of the proposed product. Accordingly, a food manufacturer is interested in purchasing high quality packaging, in the case of a lid that can be easily and reliably fixed on a container, simply assembled into working condition without excessive labor costs, having an option for a viewing window, and also allowing to save space during transportation and storage.

At the same time, for the competitiveness of packaging and reducing the cost of the packaged product, it is necessary to produce packaging that differs in the market by a set of advantages. The design created in this way, which allows storing and transporting the packaging in a flat form, having the option of a viewing window, as well as quickly packaging products in rectangular containers that are securely closed with a lid, even by unskilled personnel, is a significant advantage.

From the prior art known various kinds of products made of cardboard by assembling a punched blank.

A package is known (see [1] patent RU29044U1, IPC B65D 85/00, publ. 04/27/2003), the lid of which is a separate blank, folding along the fold lines in the form of a multifaceted prism, containing vertical side walls, a horizontal plane and a number of self-assembly fasteners. At the same time, the design requires labor-intensive assembly, time spent on folding and pairing elements, a certain qualification of the assembler, which does not allow using the cover without preliminary preparation. Also, the lid does not have locks for fixing on the bottom of a separate container.

A package is also known from the prior art (see [2] RU59022U1, B65D 5/00, publ. 12/10/2006), the lid of which is also made of a sheet blank with fold lines forming vertical side walls and a horizontal plane of the lid with a glued viewing window . The disadvantages of this design are the need for pre-assembly, hence the time spent on preparing the cover. Also, the lid does not have locks for fixing on the bottom of the container.

Known egg packaging lid (see [3] RU2679478C2, B65D 85/32, publ. 02/11/2019), the lid of which is made from a sheet blank with fold lines, additional self-assembly valves and a viewing window. At the same time, the lid is made in a simple flat form, which does not provide for automatic fastening locks to the bottom of the package, which means that there is no fixation on the container. In addition to the lack of locks, the main disadvantage of the design is labor-intensive assembly, which does not allow the use of the lid without prior labor-intensive preparation.

A resealable paper lid for containers is known (see [4] WO2017/208265A1, IPC B65D 43/02; B65D 5/68, publ. 12/07/2017), which is a three-dimensional product made from sheet material, there is a viewing window. The main disadvantage is the need to manually fix each lock (the illustrations accompanying the publication of the patent show six such locks) on the container flange after putting the lid on the container, which requires additional labor and limits the use of such a design in the packaging of products in their mass production.

Known paper cover (see [5] CN214932137U, IPC B65D 1/00; B65D43/02, publ. 11/30/2021), which is a three-dimensional product made from sheet material by molding. The product has vertical walls with a second layer of material of the same vertical walls tucked inward, which creates a locking inner part and holds the lid on the container due to the tension of the lid and the step of the second layer. Unlike all previously considered examples known from the prior art, the lid has a rounded shape, which does not allow the use of a similar construct for capping a container with a generatrix in the form of a rectangle with 90-degree angles, and is intended for capping rounded containers that do not have corners. The main disadvantage of this design is the volumetric shape of the cover, which does not allow it to be transported to the place of use in an efficient way due to the creation of excess volume during transportation.

The disadvantages of the known packaging options are the difficulty in operation due to either the need for pre-assembly, or the absence of viewing windows, or the absence of automatic fixation on the container (the necessary locks for attaching the lid are either not available at all, or require manual action for individual locks to attach them to the container ), or by supplying caps in bulk, which makes their logistics inefficient. At the same time, after using the package for its intended purpose, there is no possibility of a quick reverse disassembly of the package into a flat state for effective disposal.

Many packaging structures are made by manufacturing from various types of pulp and paper material, using various die-cut die forms with further formation both by fastening with additional elements in the structure itself, and by gluing parts of the structure together.

All the designs available from the prior art, due to certain shortcomings, do not allow satisfying the consumer's need either in the absence of the need for pre-assembly, or in the presence of viewing windows, or in automatic fixation on the container, or in efficient storage of lids during storage and transportation, or on the basis of these qualities.

Disclosure of the essence of the utility model

The technical objective of the claimed utility model is to simplify the assembly process of the cover.

The technical result of the claimed solution is to reduce the assembly time of the cover both in the bulk state and in the flat state.

The technical result is achieved due to a rectangular cardboard cover made of a sheet of pulp and paper material and assembled from a scan along the fold lines into the shape of a volumetric regular truncated pyramid, expanding downwards, containing a viewing window made of film material, made on the upper surface of the central part of the cover, a side tuck walls, locking corner elements for automatic fixation of the lid for fastening on the outer flange of the container, with an adjacent adhesive edge, while the side wall material is turned inside the lid to a height less than the height of the main wall by an amount equal to the height of the outer flange of the container, and the lid is supplied flat.

Brief description of the drawings

The figure 1 shows the cover in the three-dimensional state, ready for closing.

Figure 2 shows the lid in the flat transport state, folded along the technical fold lines in the flat transport state.

Figure 3 shows a cut of a lid blank with a viewing window option prior to production assembly on a folder gluer line.

Figure 4 shows a schematic view of a container with a lid on.

The figure 5 shows the inside of the cover from the side of its corner part.

The figure 6 shows the options for turning the side wall of the lid in the form (from left to right) of a simple, O-shaped and S-shaped version.

Figure 7 shows an example of a container with an outer flange 6 for which the present lid design can be used. An important circumstance is the location of the flange, including in the corner part of the container.

The figure 8 shows the lid, put on the container, from the side of the outer corner part, as well as the detailed relative position of the locking elements of the lid on the container flange.

The following positions are indicated on the figures: 1 - technical fold lines for the possibility of bringing the lid into a flat transport state; 2 - locking corner element of the cover; 3 - underturn of the side wall; 4 - film material of the window; 5 - adhesive valve cover; 6 – container flange.

Implementation of the utility model

The lid is made by punching blanks from sheet pulp and paper material. The pulp and paper material may have a pre-applied protective inner layer to protect the material from grease and moisture contained in food products. With this method, punching out the window and the contour of the product with scoring and scoring channels is carried out in one operation together with the window opening. In this case, the application of the film material for the viewing window is carried out by an additional operation using an additional film material glued or soldered to the workpiece at the place where the viewing window is formed.

Alternatively, a protective layer in the form of a film lamination using adhesive formulations can be applied immediately after the initial punching of the windows in the pulp and paper sheet to create viewing windows in the lid with a single transparent layer of film lamination, combining the protective function of the cardboard and covering the window hole. With an alternative method of applying a protective layer, along with covering the window opening, a secondary punching operation is necessary to punch out the outer contour of the workpiece and create creasing and scoring channels.

Also, the material of the lid may not have a protective lamination at all, if such protection is not necessary in the further use of the packaging for the corresponding products, for example, those that do not emit fats and moisture.

Also, protection of the inner surface of the lid can be provided only by the film material of the window itself. If the window film material has sufficient resistance to greasy and wet food environments and will overlap the perimeter boundaries of the top edge of a rectangular container, then such cover of the pulp and paper lid material should provide an adequate level of lid protection.

It should be noted that such a method of protecting the pulp and paper material from greasy and humid environments can be considered as the most preferable for further disposal and separate collection of product components, since the film window can be separated by the consumer after use and can be disposed of separately from the cardboard part of the cover without containing no protective coatings.

Next, the lid blank along the fold lines formed during punching is formed into a ready-to-use lid, folded flat with the help of a folder-gluing line in a special way, taking into account a specially created design and an elastic state for convenient bringing the lid into working condition.

Rectangular cardboard lid made of sheet pulp and paper material and assembled from a scan along the fold lines (1) is assembled into the shape of a volumetric regular truncated pyramid, expanding downwards, which contains a viewing window (4) made on the upper surface of the central part of the lid, a side tuck walls (3), locking corner elements (2) for automatic fixation of the lid for mounting on the outer flange of the container, with an adjacent adhesive edge (5), while the side wall material is turned inside the lid to a height less than the height of the main wall by an amount equal to the height of the outer flange (6) container. The lid is delivered in flat form and, due to the described design, is transformed into a three-dimensional state without the need for pre-assembly.

One of the important problems solved by the present utility model is the reliable automatic fixation of the lid on a rectangular container without the need to perform any additional actions to fix the lid on a rectangular container. For this purpose, special locks are designed in this lid to securely fix the lid. The function of the lock is performed by the locking corner elements of the lid, which, due to slots and elastic bending, when pressed from the inside, are displaced outward, opening the horizontal section of the locking corner elements of the lid, beyond which, when closing, the outer flange of the closed container comes in and the lid is securely fixed, preventing spontaneous opening. At the same time, to ensure that the lid is held in the plane of the horizontal cut of the locking corner elements of the lid, the perimeter of the lid is made equal to or less than the perimeter of the outer flange of the closed container to create an interference fit during closing and guaranteed bending of the corner elements of the lid and secure fixation.

It should be noted that for the lid to work, a closed rectangular container must have an outer flange on the side walls along the entire perimeter of the container, especially in the area of the upper outer corners. When the lid is in tension, this allows the flange to elastically bend the locking corner element of the lid and lock onto the horizontal cut of the locking corner element of the lid, which creates a reliable lock and allows you to securely fix the lid on a rectangular container.

Also, securing the lid is additionally performed by its side walls tucked inside the lid. Such turns are made to a height less than the height of the main wall by an amount equal to the height of the outer flange of the container, in order to create a gap exceeding the height of the outer flange of the container along its perimeter. Such gates are attached to the main wall of the lid by gluing and additionally keep the lid from opening by creating a step on the inner surface of the main wall. When the lid is closed, the bent flange of the container rests against such a step, which creates an additional lock and additional fixation of the lid on the container. Such a fold can be carried out in one or several layers due to additional folds of the cover material.

It should be noted that the turn on the inner side, due to the double thickness of the side wall, creates additional rigidity of the entire structure, which has a positive effect on the operational properties of the lid.

It should be noted that the collar is an auxiliary lock for fixing to the main lock, created by the locking corner elements of the cover.

Also, simultaneously with the guaranteed reliable fixation of the lid on a rectangular container with an external flange at the corners, the technical result of this utility model is to create a lid design that allows you to effectively ensure the transportation and storage of the package by bringing it to a flat non-volumetric state using a folder-gluing line in a special way to save elastic state for convenient bringing the cover into working condition.

It is noteworthy that when folded and elastically deformed, the pulp and paper material has the ability to elastically return to its original state, and it is this property that is used to maintain the elastic transport state of the lid for its convenient bringing into working form. To do this, when assembling and packaging on folder-gluing equipment, the fold of the side walls inside the lid can be glued not along the entire length of the fold, but partially, for example, only in the central part or only along the edges for elastic separation of the tucked-in part of the wall from the inner surface of the main wall.

It should be noted that such an elastic distance of the wall tuck from the main wall, in addition to automatically bringing the lid to its original state, makes it possible to better create a holding effect and fix the lid on the container compared to gluing along the entire length of the tucked wall due to a greater overlap with the outer flange of the container throughout its length.

Thus, when using the lid, elastic folding allows the lid to be brought into working condition when the product is removed from the pack, and the flat transport state turns into a three-dimensional one with the minimum possible assistance in an intuitive way, even by an inexperienced consumer.

Also, it should be noted that the shape of the viewing window can be made in any shape, for which punching knives of any shape can be used in the process of die-cutting.

Thus, summing up the advantages described above, in the present utility model, the claimed technical result is achieved in a separate rectangular cardboard cover with a viewing window, made of a flat frame material, automatically fixed on a rectangular cardboard container with an external flange at the corners, by fitting the cover into an interference fit on the flange container with the help of a locking corner element of the lid and a turn of the side wall material, which creates additional fixation, and is also effectively delivered in a flat form while maintaining an elastic state for convenient bringing the lid into working form.

It should be noted that the present utility model does not limit the use of pulp and paper material as a framework material. Considering the possible methods of protecting the inner surface of the package described above, which protect the frame material from moisture and fats released by food products, other types of flat materials containing other types of vegetable and synthetic fibers, processed pulp and paper products, waste paper can also be used as frame material. .

Also, it should be noted that the described principles of the present utility model do not prevent the creation of such packaging of various geometric dimensions. In the event that the walls or other structural elements are increased or reduced in length, width or height, then in order to create such a package, the dimensions of special structural elements can be changed without losing the properties and qualities of the described advantages and technical results.

The described design of a separate cardboard lid for a rectangular cardboard container simultaneously combines a set of the following consumer properties:

- it is delivered in assembled form and there is no need for pre-assembly;

- reliably automatically fixed on a rectangular container with an external flange at the corners due to reliable locks;

- stored and transported in a flat state, which achieves the highest possible efficiency of logistics and warehousing as a result of minimizing the amount of storage;

- Can be folded flat for disposal.

It should be noted that the types of packaging shown are examples. In practice, the dimensions of the package and its shape can be any, as well as the presence of additional elements or their absence.

It should also be noted that this utility model, which is disclosed with a description of the specific accompanying drawings, is not limited to these embodiments described and shown by way of example only, and that changes and modifications that are obvious to a person skilled in the art are possible without going beyond the useful model as it is disclosed in the attached formula.

Claims (2)

1. Rectangular cardboard lid made of sheet pulp and paper material and assembled from a scan along the fold lines, characterized in that the lid is assembled along the fold lines into the shape of a volumetric regular truncated pyramid, expanding downwards, containing a viewing window made on the upper surface of the central part lids, side wall tuck, locking corner elements for automatic lid fixation for mounting on the outer flange of the container, with an adjacent adhesive edge, while the side wall material is tucked inside the lid to a height less than the height of the main wall by an amount equal to the height of the outer flange of the container, and the lid supplied flat. 2. Rectangular cardboard cover according to claim 1, characterized in that the viewing window is made of film material.

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