RU2334660C2 - Workpiece for container and container made from said workpiece - Google Patents

Abstract

FIELD: items of personal and house use.

SUBSTANCE: container contains a wall and the bottom ground element. The element is surrounded by a wall of the container and is in connection impenetrable for a liquid with the container. The discharge opening which can be closed by a cover, as necessary, is located opposite to a ground element and surrounded, in the place of its location, by the container wall. Corresponding workpiece for such container, in particular, a container wall, contains the top and the bottom peripheral edge and the first and second connecting edges connecting the aforesaid peripheral edges sidewise. Each of the said connecting edges goes through along the zones of overlapping, which cover, at least, one another after their connection, and form, at least, one viewing aperture. The invention provides obtaining of a container with strengthened viewing apertures.

EFFECT: container has a simple design and is cheap to manufacture.

21 cl, 9 dwg

Description

This invention relates to a blank for a container, in particular to a wall of a container comprising an upper and lower peripheral edge and first and second connecting edges that laterally connect the peripheral edges, and each of which extends along overlapping zones interconnected to form the container .

The invention also relates to a container, which can be formed from said blank, said container containing at least one lower bottom element, which is surrounded by the wall of the container and is in liquid-tight connection with it, separately from the container wall. A discharge opening located opposite the lower element, which, if necessary, can be covered by a lid, is surrounded by the wall of the tank.

It is currently known from practice that such a preform or a container made from it has at least one inspection hole in its wall that can be used to view from the outside of the container. This opening helps, for example, control the filling or filling level of the container and, if necessary, the quality of the contents of the container. The contents of a container of this type can be, for example, food that can be taken through the upper discharge opening, for example, yogurt, ice cream, bulk or bulk food, and the like.

A special tool is still used to form such a viewing hole in the corresponding workpiece. For example, in the manufacture of a hole by perforation, it is necessary to remove the corresponding separated part of the workpiece, for which an additional ejection means is usually provided, which after perforation can be used to separate the workpiece from the corresponding tool. The separated portion is usually removed by suction or the like. Thus, the existing method of manufacturing the workpiece and the corresponding device are relatively complex and expensive.

In addition, such a preform or a container wall formed from it has partially in the region of the inspection hole only low strength and shape stability, which depend on the material of the preform. This can cause leakage in the area of the inspection hole, for example during operation of the container and when a corresponding pressure is applied to the container in the area of the inspection hole.

The objective of the present invention is to improve the workpiece or capacity, so as to simplify and reduce the cost of its manufacture, while strengthening the inspection hole, which could withstand heavy loads.

This problem is solved in accordance with the features of the invention set forth in paragraph 1 and paragraph 12, respectively.

The peripheral edges in at least each of the overlapping zones along the first and second connecting edges of the workpiece can be formed by trimming the corresponding edge, while there is no need for a special tool to obtain the corresponding holes in the workpiece from the outer surface of the overlapping zones. Since in any case, edge trimming is performed during the production of the workpiece, this process transition can be simultaneously used to produce the corresponding peripheral holes. Due to their placement in the overlapping zone, the corresponding parts of the workpiece removed in the manufacture of peripheral holes can be removed with waste arising from trimming the edge. Separate disposal of waste generated from the outer surface of the overlap zones is no longer necessary.

Therefore, there is no need to use an appropriate ejection means for separating the workpiece, for example, from a perforating tool in the manufacture of a standard inspection hole.

Due to the fact that a peripheral hole is formed in at least each of the overlap zones, an inspection hole made up of them after connecting the overlap zones is also located in the overlap zone. Since at the indicated location the wall thickness of the tank is essentially two times thicker than the remaining wall of the tank due to the connection of two overlapping zones, the inspection hole is located in the hardened zone of the tank and, accordingly, has increased resistance and can be subjected to high loads without breaking the liquid tight connections.

In addition, the separation of the workpiece from the corresponding tool during trimming of the edge can be simplified if the peripheral hole is made in the form of a peripheral recess, open in the outer direction to the connecting edge. Subsequent at least partial overlapping of these peripheral recesses during the formation of the container will lead to the formation of the corresponding inspection holes.

To obtain a sufficiently large viewing hole at minimal cost it can be useful if the peripheral holes are completely overlapped with the formation of the corresponding viewing hole, not necessarily the same shape. For this reason, these peripheral holes can be located at the same distance from the upper and / or lower peripheral edges.

The manufacture of peripheral holes and the separation of the workpiece from the corresponding tools can be further simplified if the peripheral holes are not sharp edges, but rounded.

It is possible that the corresponding peripheral hole extends into the workpiece beyond the overlap zone. Due to the fact that part of the peripheral hole is located in the overlap zone, the strength of the inspection hole in the resulting product is at least partially increased. However, to maximize strength, the peripheral hole should be limited by the corresponding overlap zone and not extend further into the workpiece.

You can also get several peripheral holes along the overlapping zone, for example, with a variable interval between adjacent peripheral holes in the direction from the lower to the upper peripheral edge. Moreover, the closer the peripheral hole to the lower peripheral edge, the smaller the interval. Due to this, it is possible to better control the remaining product of the container. From a production point of view, it may be preferable if the peripheral openings along the overlapping zones are equidistant from each other. Typically, such an equidistant arrangement is sufficient to control the contents of the container.

It is possible that both the peripheral openings along one overlapping zone and the peripheral openings in the two overlapping zones have different cross sections compared to each other. For example, a relatively small peripheral hole may be formed at the upper peripheral edge, which is sufficient to control the level of the product inside the container. A corresponding peripheral hole elongated along the overlapping zone can be formed in the region of the lower peripheral edge, which helps to best ensure that the container is empty. However, in a simple embodiment, all of the peripheral openings may have the same cross section.

The corresponding peripheral holes can have their boundary at a certain distance from the internal line of overlap of the overlap zone. This allows a suitable connection of the surface of the overlap zones around or at least partially around the peripheral opening. This can also have a positive effect for producing inspection openings of the largest possible diameter when the peripheral openings extend beyond the internal overlap of the overlapping zone. This feature is a particularly important advantage for areas of overlapping small widths, where, however, sufficiently large inspection openings should be made.

The peripheral holes can be made so that the corresponding overlap line is essentially in contact with the peripheral holes. It is also possible that the peripheral holes extend with their internal edges beyond the overlap line, at least in part.

The inspection openings made in the container blank may be covered with a liquid-tight film or coating. The peripheral hole may be surrounded at least partially by the area under the coating to facilitate the use of film or coating. Said coating portion serves, in particular, for fixing the film or coating outside the peripheral or inspection openings, which leads to increased liquid impermeability. Mentioned areas under the coating can pass both through the respective overlapping zones, and beyond the limits of these zones further into the workpiece.

The peripheral holes may have different cross-sections, which leads to various cross-sectional shapes at the inspection holes. The cross section of the inspection openings may be of various shapes, for example, star-shaped, cross-shaped or any other; viewing holes, in addition to being able to control the contents of the container, can also improve the visual perception of the container from an aesthetic point of view. Simple cross-sectional shapes - oval or circle. If the inspection hole should be elongated in the overlapping zones in the longitudinal direction, then they and their corresponding peripheral holes can be made slit-like. The width of the cross section may also vary in the longitudinal direction of the overlap zone.

During the manufacturing process of the container, the corresponding preform is deformed so that the overlap zones come into contact with each other with subsequent connection, forming at least the wall of the container. The specified connection can be performed in a standard way by gluing or fusing with a plastic coating of the workpiece material, usually present on it. Materials for the procurement may be various plastics, especially for food products, as well as paper and cardboard. The coatings of these materials are also compatible with food products, as well as impervious to liquids and, if necessary, can be made gas-tight. The preform material or coating may have a layered structure representing several layers of different materials.

The corresponding lower container element may be made of the same material. The container can also be optionally closed with a lid on the side opposite to the lower element, and the corresponding discharge opening can be located in the indicated place.

There are various options for connecting the vessel wall and the lower element, for example, by bending the lower peripheral edge of the blank for the vessel wall in the direction of the inner part to form a receiving groove for the peripheral flange of the lower element. The specified peripheral flange is directed towards the receiving groove, inserted into it, and then connected by a liquid-tight connection to the container wall.

The corresponding upper peripheral edge of the workpiece can be bent and / or stamped to form a roll or other shape of the edge of the hole. The edge of the hole, made in the form of a roll or in any other form, can also be used to secure the cover.

As previously explained, the inspection hole is hermetically sealed with a liquid-tight special transparent film or coating.

In order to avoid the need to close each individual inspection hole with a liquid-tight coating, an appropriate coating or film can be applied along the entire overlapping zone and thus close all inspection openings at the same time, which can be made on the inside and / or outside of the container.

It should also be noted that the overlapping zones have a connecting edge located in the inner part of the container after its formation, which, in this case, can be considered an advantage provided that the liquid-impermeable film or the coating of the inspection openings at least covers the connecting edge located in the inside of the tank. The connecting edge can also be closed separately, for example during the separation of the workpiece or at the next technological transition after that.

In addition, the film or coating can serve not only to ensure the impermeability of the liquid, but also for the simultaneous connection of the overlapping zones. This can, for example, be realized by extending the film or coating beyond the inside of the container at least to the peripheral edge of the connecting edge. The outer connecting edge may also be further covered by a film or coating. The film or coating can also be located between the connected areas of overlap.

To allow inspection of the inside of the container through the inspection openings, the film or coating should be made of a transparent or at least partially transparent material. It is also possible to make a film or coating with at least partially applied image and / or coloring. As such an image, for example, an indicator of the desired level of filling of the container can be applied. In this way, you can check if the container is filled properly. It is also possible to apply other images for advertising purposes. The application of the image and / or coloring provides a positive aesthetic effect. It is also possible if the film or coating will change color in case of heating or cooling the contents of the container or in case of loss of contact with the film or coating in the area of the corresponding inspection hole. A color change can also occur as a result of a change in the temperature of the contents of the container, which can, for example, be used to determine the appropriate level of heating of the contents of the container.

To protect the inspection openings, at least before starting to use the container, they can be closed on the outside of the container with a snap-on lid. This procedure can protect the inspection openings during filling and operation of the container, as well as during transport or sorting of containers. The lid can be opened or removed if necessary only when using the container for its intended purpose.

When using a snap-on lid, the possibility of its subsequent closure after opening can also be an advantage. This possibility of re-closing can also be realized by using a self-adhesive and / or peel-off lid. The possibility of making a snap-on lid is also self-adhesive important, for example, for the curved edge of the lid. When removing the cover, it can remain both removed and be installed again if it is self-adhesive.

In the manufacture of a preform for a container or container, attention should be paid to the way in which the preform for the formation of the upper and lower peripheral edges, as well as the first and second connecting edges connecting the peripheral edges on the side, was separated, cut or made in another way from the original sheet. The workpiece produced in this way, then perform edge trimming, especially in the zone of connection of the edges. If necessary, trimming of the edges can also be performed in the area of the upper and lower peripheral edges.

In the process of trimming the edges, the corresponding peripheral holes are made in at least the area or areas of overlap. The specified workpiece equipped with peripheral holes, then cut along the edges, and then bent to give it the shape of the walls of the tank and hermetically closed in the overlap zone. During the connection, the inspection openings are made from the peripheral openings of both overlapping zones with at least partial overlapping being realized.

It should also be noted that cutting edges and making peripheral holes can be performed both simultaneously and sequentially. The next technological transition in the production of containers is the application of a film or coating in the connected overlapping zones or between them for hermetically closing the resulting inspection openings.

A suitable film or coating can be applied, for example, before joining the overlap zones to seal, for example, one or both peripheral edges, or, if necessary, find use as an adhesive when joining the overlap zones.

Preferred embodiments of the present invention will be described in more detail with reference to the figures attached to the drawings, in which:

figure 1 depicts a top view of the first variant of the production of the workpiece according to the invention;

figure 2 depicts a top view of a second variant of the production of the workpiece according to the invention;

figure 3 depicts a top view of a third variant of the production of the workpiece according to the invention;

figure 4 depicts a top view of a fourth variant of the production of the workpiece according to the invention;

figure 5 depicts a top view of a fifth variant of the production of the workpiece according to the invention;

6 depicts a top view of a sixth embodiment of the production of the workpiece according to the invention;

Fig.7 depicts a top view of a seventh embodiment of the production of the workpiece according to the invention;

Fig. 8 is a sectional side view of a container made from a blank according to Fig. 5;

Fig.9 depicts a top view of the exfoliating cover of the inspection holes.

Figure 1-7 depict seven different embodiments of the preform 1 according to the invention, the same parts of the preform having the same reference designations, this is explained only with respect to one figure.

The blank 1 according to FIG. 1 is used to form the wall 3 of the container 2 (see also FIG. 8). The perimeter of the workpiece is formed by a curved upper peripheral edge 4 and a curved lower peripheral edge 5, as well as the first and second connecting edges (6, 7), which connect these peripheral edges to the side. The edges 6, 7 extend in the forward direction and include overlapping zones 8 and 9, which form a container and are in fluid tight connection with each other (see Fig. 8).

The overlapping zones 8 and 9 are located around the peripheral holes 10, forming peripheral recesses 16, open in the direction of the edges 6 and 7; see also the following figures.

Zones 8 and 9 are defined by overlapping lines 19 and 20 extending at some distance from the corresponding edges 6 and 7. The holes 10 extend with their inner edges 21 up to lines 19 and 20. The specified edge 21 can partially reach the corresponding line 19 or 20 (see also figure 6 or 7).

The holes 10 in the corresponding zones 8 and 9 have the same cross section and are located at the same distance from the edge 5. The connection of zones 8 and 9 with the overlapping of the holes 10 leads to the formation of the corresponding viewing hole; see reference signs 13, 14 and 15 in Fig. 8.

When implementing the invention according to FIG. 1, only one hole 10 is located in each of the zones 8 and 9, therefore, when forming the wall 3, only one viewing hole is formed.

Other areas indicated by dashed lines parallel to the respective peripheral edges extend along edges 4 and 5. The corresponding area along edge 5 forms a receiving groove 26 (see FIG. 8), and the area along edge 4 forms a roll 27 (see FIG. 8).

The material for the manufacture of preform 1 is usually paper or cardboard coated with a plastic film, which is usually chosen because the film is at least impermeable to liquid, and also, if necessary, to gas. In addition, the film can also be used to connect the overlap zones during the manufacturing process of the container 3, for which the film is melted using a heat source, which leads to a liquid-tight connection of the overlap zones after the film has hardened.

The implementation of the invention according to figure 2, differs from the implementation according to figure 1 by the presence of another peripheral hole 11 in each of the zones 8 and 9.

Similarly, in the third implementation of the invention, according to figure 3, the peripheral holes 12 in each of the zones 8 and 9 are located closer to the edge 4 compared with the implementation according to figure 2.

Finally, FIG. 4 depicts a fourth embodiment of the invention with three holes 10, 11, and 12 located along zones 8 and 9; moreover, the corresponding peripheral holes are located at the same distance from each other and have the same cross section.

In the implementation of the invention according to figure 2 and 3, the wall 3 has two viewing holes, in the case of the implementation according to figure 4 three viewing holes.

5 and 6 show further embodiments of the invention, where the holes 10 and 12 are located at the same distances 7 and 18 from the edges 4, 5. The corresponding peripheral holes have a semicircular cross section extending in the direction of the corresponding edges 6 and 7. In this case , the corresponding lines 19 and 20 mainly extend tangentially to the corresponding holes 10, 11 and 12.

When implementing the invention according to Fig.6, the corresponding holes 10, 11 and 12 reach their edge 21 to the corresponding line 19 and 20, which leads to the formation of elongated viewing holes of oval cross-section.

The inspection openings 13, 14 and 15 of FIG. 8 are essentially formed by the openings 10, 11 and 12 of FIG. 5, said inspection openings having a circular cross section.

It is also possible to use in any embodiment of the invention a larger number of peripheral holes, which can also be distributed in the longitudinal direction of the overlapping zone not uniformly, but in some other way. For example, the peripheral holes can be located at the edge 5 with shorter intervals or so that the closer the peripheral hole to the lower peripheral edge, the shorter the interval. Various combinations of both the cross-sectional shape of the respective peripheral holes and the method of their distribution in the overlapping zones are also apparent.

It is also possible that the peripheral holes pass through the corresponding zone or line 19 and 20 further into the workpiece 1.

In yet another embodiment of the present invention, the peripheral openings may have various cross-sections in or along the overlap zone, which, if necessary, only partially overlap each other in the overlap zone to form corresponding inspection openings.

When implementing the invention according to Fig.7, in each of the zones 8 and 9 only one hole 10 is made, which passes through most of each of the zones 8 and 9 between the edges 4 and 5, which leads to the formation of a slit-like inspection hole in the finished container.

In the implementation of the invention according to FIG. 7, next to the hole 10, an additional area is indicated for the coating 22 and 23, which surrounds the hole in the corresponding blank 1. The corresponding zones 22 and 23 can also be made for holes 10, 11 and 12 of the previous embodiments.

In the finished container 2 (see Fig. 8) and the finished wall 3, zones 22 and 23 are intended for applying a film or coating 28 (see Fig. 8).

For the embodiment of FIG. 7, the holes 10 in the respective zones 8 and 9 do not have to be the same, they can, for example, also protrude beyond the lines 19 and 20 into the remainder of the workpiece, or be offset with respect to each other in the longitudinal direction of zones 8, 9.

However, the installation or application of the film or coating 28 is usually simplified if the holes 10, 11 and 12 are the same or completely overlap each other.

Fig.8 depicts a side view of the tank 2 with a slit through the middle made from the workpiece according to Fig.5. The corresponding zones 8 and 9 are connected to the floor in a liquid-tight manner. When overlapping zones 8 and 9, the corresponding holes 10, 11 and 12 are also overlapped, forming inspection holes 13, 14 and 15.

The lower part of the container 2 contains a lower element 24, which has a peripheral flange 32 located around it and directed downward, which is inserted into the receiving groove 26 of the wall 3. The specified groove is made by bending upward the edge 5 with the subsequent insertion into it of the corresponding flange 32 of the element 24 and establishing an impermeable for fluid connections between the element 24 and the groove 26.

In the upper part, the container 2 has a discharge opening 25 surrounded by a roll 27 or a similar edge. Roll 27 is made by bending the edges 4.

In the inner part 29 of the container and / or on its outer side along the zones 8 and 9, a film or coating 28 is applied that provides liquid tightness through holes 13, 14 and 15. The use of a film or coating 28 can be used to seal all holes 13, 14 and 15. In the area of the hole 13 of the film or coating 28, a level indicator is applied in the form of an image 30, which can be colored if necessary.

The film or coating 28 can also extend beyond the edge 6 up to the outer part of the container 2, in particular to the outer part of the second edge 7, ensuring its tight connection in a liquid-tight manner.

As can be seen from Fig. 8, the openings 13, 14 and 15 reach only the connected zones 8 and 9, so that they are surrounded by a two-layer material of the workpiece 1, thereby increasing the strength of the material in the region of the inspection openings.

On the outside of the container 2, an additional snap-on lid 31 can be installed to close the holes 13, 14 and 15. Fig. 9 shows such a lid in a rectangular design. The cover 31 may be attached by one of its longitudinal edges to the container 2, while the other longitudinal edge may be bent from the container to allow access to the openings 13, 14 and 15 and to inspect the inside of the container. You can attach the bent edge with the possibility of detaching it to the outer part of the container, as a result of which the lid can be closed again. It is also possible to attach the curved horizontal edge of the lid 31 using an initial one-time connection to the outside of the container to determine whether the latch has previously been opened or not.

The cover 31 can also be made in the form of a strip, self-adhesive and / or peeling (see Fig.9).

According to this invention, the containers and the corresponding blank for them are distinguished by the simplicity of manufacturing the corresponding inspection openings and their placement in the overlapping zones. This special arrangement provides increased strength in the area of the inspection openings.

In addition, there is no separate waste in the production of inspection openings, since they are performed together with trimming the corresponding edges, followed by the general disposal of the resulting waste. Due to the implementation of the peripheral holes in the form of open peripheral recesses, no additional means are required, for example, ejectors and the like, requiring the workpiece to be separated from the corresponding tool when making the holes.

Claims (21)

1. The blank (1) for the tank (2), in particular, the wall (3) of the tank, containing the upper and lower peripheral edges (4, 5) and the first and second connecting edges (6, 7), which connect laterally specified peripheral edges, and each of which extends along overlapping zones (8, 9) configured to interconnect to form a container (2), characterized in that at least one of the overlapping zones (8, 9) is formed a peripheral hole (10, 11, 12), wherein said peripheral holes (10, 11, 12) when connected he overlapping (8, 9) at least partially overlap each other with the formation of a viewing hole (13, 14,15). 2. The workpiece according to claim 1, characterized in that said peripheral hole (10, 11, 12) is made in the form of a peripheral recess (16) open in the direction of the connecting edge (6, 7). 3. The workpiece according to claim 1, characterized in that the peripheral holes (10, 11, 12) are located at the same distance from the upper and lower peripheral edges (4, 5). 4. A workpiece according to any one of claims 1 to 3, characterized in that the peripheral holes (10, 11, 12) are placed within the corresponding overlapping zone (8, 9). 5. A workpiece according to any one of claims 1 to 3, characterized in that the peripheral holes (10, 11, 12) are equidistant from each other along the overlap zone (8, 9). 6. A workpiece according to any one of claims 1 to 3, characterized in that the peripheral holes (10, 11, 12) have the same cross section. 7. A workpiece according to any one of claims 1 to 3, characterized in that the peripheral holes (10, 11, 12) extend to the internal overlap line (19, 20) of the overlap zone (8, 9). 8. A workpiece according to any one of claims 1 to 3, characterized in that the peripheral hole (10, 11, 12) extends with its inner edge (21) at least partially along the overlap line (19, 20). 9. A preform according to any one of claims 1 to 3, characterized in that the peripheral hole (10, 11, 12) is surrounded at least partially by the area under the coating. 10. A workpiece according to any one of claims 1 to 3, characterized in that the cross section of the inspection hole (13, 14, 15), which is formed by peripheral holes (10, 11, 12) is essentially round or oval. 11. A preform according to any one of claims 1 to 3, characterized in that the cross section of the inspection hole (13, 14, 15), which is formed by peripheral holes (10, 11, 12) is essentially slit-like. 12. A container (2) comprising a wall (3) and a lower bottom element (24), which is surrounded by said wall and is in fluid tight connection with it, and having a discharge opening (25), which can be closed with a lid if necessary, which is surrounded by the wall of the tank and which is located opposite the bottom element (24), characterized in that the wall (3) of the tank is made of a workpiece (1) according to claims 1 to 11. 13. A container according to claim 12, characterized in that the lower outer edge of the wall (3) of the vessel is curved towards the inside of the vessel (29), and a receiving groove (26) is formed to receive the outer flange (32) of the bottom element (24). 14. A container according to claim 12 or 13, characterized in that the upper outer edge (4) of the wall (3) of the container is bent and / or stamped in the form of a roll (27) and the like. 15. A container according to claim 12 or 13, characterized in that the inspection hole (13, 14, 15) is hermetically sealed with a liquid-tight film (28) or a coating. 16. Capacity according to item 12 or 13, characterized in that the specified film (28) or said coating extends along the overlap zone (8, 9). 17. A container according to claim 12 or 13, characterized in that the film (28) or the coating is closed by at least one connecting edge (6) located in the inner part (29) of the container. 18. A container according to claim 12 or 13, characterized in that the film (28) or coating extends from the inside (29) of the container around the connecting edge (6) located in the inside of the container and at least to the outside of the connecting edges (7). 19. A container according to claim 12 or 13, characterized in that the film (28) or coating has at least a partially applied image (20) and / or color. 20. A container according to claim 12 or 13, characterized in that the inspection hole (13, 14, 15) can be closed by a snap-on lid (31) outside the container (2). 21. A container according to claim 12 or 13, characterized in that the lid (31) is self-adhesive and / or exfoliating.

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