RU2410304C2 - Container in form of reservoir and removable lid having cuff, and method for fixing this lid - Google Patents

Abstract

FIELD: packaging industry. ^ SUBSTANCE: container in the form of a reservoir and a removable lid for closing and opening space for storage of product has a base in the form of a bottom and an outer wall having at its top a peripheral edge limiting the opening of this container, which is closed when the lid is installed on it. The lid is a snap-in lid with a closing part and a cuff, which covers the edge of the reservoir hole. The cuff overhangs down, and the edge of the reservoir hole has a locking ring and a round flange located under that locking ring, at that the cuff of the lid springs radially outward and inward, and is made with a circular locking element, which faces the flange, located on the container, and which in the position of fixing the lid overhangs under this flange and contacts with the bottom surface of the flange. The said locking element is made with one or more passages to release air from the container into the environment during the installation of the lid. There is also a method provided for installation the removable lid on the container. ^ EFFECT: invention is aimed at creation of improved construction of a container with a lid and a cuff, in which the possibility of undesirable leakage of fluid from the reservoir and its damage are excluded, in case of excessive pressure that will counteract the force applied to hold the lid in place. ^ 7 cl, 9 dwg

Description

The present invention relates to a container in the form of a container and a removable lid that has a cuff according to the preamble of claim 1.

The present invention also relates to a method for attaching this cap to said container according to the preamble of claim 5.

In order for the lid to tightly seal the container corresponding to it, there are sealing surfaces in contact with each other, which can begin to form a capping connection even before this lid is fully fitted. Accordingly, an overpressure may occur inside the container, which will counteract the force applied to hold said lid in place. This circumstance may complicate the attachment of the lid, and there is also a risk that the fit of this lid may be accidentally loosened, especially with careless handling. In addition, both the container itself and its corresponding lid may be deformed during use. Other disadvantages associated with the presence of excess air in the container include the fact that the product stored in this container, such as paint, can become unusable faster.

To solve the aforementioned drawback, attempts have already been made, such as removing air using a vacuum pump connected to a check valve lid, when the air contained inside the tank is removed using this pump in the manner described, for example, in US Pat. No. 5,806,704. However, this procedure requires relatively expensive equipment and covers of relatively expensive construction, which is undesirable in those industries where the packaging itself and the product contained in it are not too expensive .

An object of the present invention is to provide a container in the form of a container with a removable lid, eliminating the aforementioned disadvantages.

This problem is solved using a container made according to the invention and having the characteristics according to claim 1 of the attached claims.

This problem is also solved using a method having the features set forth in paragraph 5 of the attached claims.

The present invention will now be described in more detail using an example embodiment and with reference to the accompanying drawings, in which:

Figure 1 is a view in vertical section through a container with a lid installed on it according to the invention,

Figure 2 is an enlarged view in cross section through the upper edge of the specified capacity, and through its cover,

Figure 3 is an enlarged sectional view of a separate lid from the inside,

Figure 4 is another enlarged cross-sectional view of the lid from the inside, and

5-9 are vertical sectional views illustrating a method for attaching said cover according to the invention.

According to the invention, a container, for example, for storing and transporting liquid products, such as paints, is shown completely in FIG. 1, representing the container in a central vertical section through the axis of symmetry 1 of the container, with respect to which the container, shown as an example, is symmetrical when rotation. This container consists of a container 2 with a cover 3. In the example shown, the container and the covering part of the cover are made of relatively thin sheet material, usually of tin having the same thickness, or a flat sheet or roll material, for example, a steel sheet with a surface coated with tin, at least on one side, and possibly painted at least on the outside. This sheet can also be painted inside for better corrosion protection. The thickness of this sheet is, for example, from 0.1 to 1.0 mm, usually from 0.1 to 0.5 mm. To reduce the amount of material required and, consequently, the cost and weight of the container, for the content of paints in it, for example, a material of relatively small thickness is selected, but a relatively strong shape is given to the container, especially in the region of the edges.

In the region of the bottom, said container has a base 4, which is usually flat and attached to the outer wall 5, which extends upward around it and usually has a slightly conical or possibly cylindrical shape. The connection with this base is carried out, for example, in the traditional way by bending said edges and welding, so that a sealed connection is obtained. The outer wall 5 is connected by means of a seam (not shown). At the top, this outer wall forms a circular peripheral edge 6 that surrounds the opening of the indicated container, and this opening is usually closed by a cover 3. Accordingly, this cover has a peripheral edge 8 that is designed to form a sealed connection with the edge of the opening of the container and keep this cover closed. .

The opening 39 of said container is best shown in FIG. 2, and it is formed from an elongated part of the outer wall 5. This means that in addition to the part that is straight in the part that forms the outer wall, there is also a steel sheet cut out for the formation of the outer wall 5, has a continuation that forms the edge of the hole, as well as an additional part, the function of which will be described in more detail below.

The opening edge 6 of said container, like the rest of this container, may have a structure known in the art, for example, the structure shown here as an example is described in more detail in SE-B 525 814. Its main structural elements are described here with reference to figure 2 for a more complete understanding of all the functional features of the specified container. The edge 6 of the opening of the specified capacity is performed by bending outwardly the top of the outer wall 5 to form a rounded corolla 9, which then changes its shape and goes into the outer edge 11, directed at a given suitable angle inward to the outer wall 5, while this edge takes the form of an inverted truncated cone. This part is preferably connected at the bottom with the outer wall of the container 10, so that the outer edge 11 rests on the outer wall of the container, namely its outer section.

An elongated portion of said sheet passes into a portion bent outward by a combination of folds, and an edge 12 that is bent inwardly into a flange 13 made a short distance below the edge 6 of the opening of said container. In the shown example, the flange 13 has three main surfaces, namely, the flange surface 14, which protrudes radially outward and is essentially facing up, then this surface passes into the flange surface 16, which faces radially outward, and this surface, which is cylindrical in the shown example, is also can be slightly curved, and then it changes from this place, passing through the lower curved edge 17 to the flange surface 18, facing down and ending with the said rolling edge 12. This design The section is preferably in contact with the outer side of the outer wall to provide support and strength to the flange 13, which essentially performs the function of attaching the cover 3, which will be described in more detail below.

The cover 3 has a structure that is characteristic of the present invention, which is shown in more detail in Fig.2-4. This cover is a snap-on cover, which means that the edge 8 of this cover surrounds the edge 6 of the opening of the specified capacity, that is, extends behind it in the radial direction and protrudes down under the rim 9 of the edge of the specified hole. Namely, the edge 8 of this lid has a cuff 19, which protrudes downward from the edge 6 of the opening of the container so that this lid is firmly held on it and provides a tight seal. Namely, the edge 8 of the lid 3 has a round flange 20, which protrudes upward and extends around the rim 9 of the edge 6 of the opening of the specified capacity. This flange 20 consists of an inner wall 21, an upper wall 22, and an outer wall 23. These walls extend inward, upward, and outward from the upper edge 6 of said container, respectively. On the inner side, that is, on the back side of the upper wall 22 of the indicated flange, a groove 47 is made facing the edge 6 of the opening of the indicated container, and in this groove is a gasket 24 made of a suitable flexible material, such as an elastomer, such as a polymer, such as polyvinyl chloride, or rubber material to form a seal between the round rim 9 of the container and the edge of the lid. From the outer wall 23, the material from which the sheet is made is bent outward from the upper edge 6 of the indicated container to the outer flange 25, which consists of a flange 26 that protrudes outward in the radial direction and becomes in this place a curved part 27, in this case a part that bent upward with a rounded transition section 28. The outwardly extending flange 26 and the curved portion 27 form a fastener for the cuff 19 of the lid 3, said cuff being made of plastic, for example polypropylene, which is flexible and elastic chnym and can be produced, for example, by injection molding directly onto the peripheral edge of the cover part 46 of said lid, which in the shown example is made of sheet metal.

The cuff 19 forms an upper peripheral flange 29, which extends upward, and the fastening part 26, 27 of the steel cover 3 is included in the plastic material of this peripheral flange, for example, as a result of its sealing or insertion into the groove of this plastic flange. It should be noted that not only the curved part 27, but also the entire mating portion 28 and part of the outwardly facing flange 26 are inside this plastic material. As a result of this operation, a good engagement of the fastening part of the steel cover is created. The flange 29 is the thickest part of the cuff 19, it goes down to the part 30, which has a relatively equal thickness, and which continues further in the vertical direction, which is essentially the same as the continuation of the flange 13 of the specified capacity, and which has in its at the bottom, the peripheral groove 31, best seen in Figs. 3 and 4. This groove 31 goes down into a round roller 32 with a supporting surface 33 that is inclined downward and directed radially inward, and with a rounded apex 34. A small arc departs from this roller 32 the peripheral engaging part 35, it extends outward from the wall of the indicated container down to its peripheral edge 36. On the outer side of the cuff 19, at the level of the lower part of the roller 32, there is a round groove 37 that forms a fold or hinge line for the engaging part, which you need to bend up to the outer side of the upper part of the cuff 19, to bring it into the open position required to remove the cover.

When the lid is in the closed and attached position, which is shown most clearly in FIG. 2, the roller 32 acts as a means for closing and attaching the lid when it is connected to the flange 13, which is directed radially outward from the outer upper edge 6 of the indicated container when said roller extends protruding under the flange 13, more precisely, under its rounded lower outer edge 17, and, due to the corresponding cuff dimensions and the flexibility of the plastic material, is pressed radially inward, thus providing ohm, attachment. Due to the inclined supporting surface 33 of this roller, a downward axial force arises, which presses the sealing gasket 24 of the cover against the rim 9 at the edge 1 of the container. As a result of these operations, the lid is tightly and securely attached to the container.

To open the specified container, it is necessary to place one hand under the engaging part 35 and bend it up outward, as a result of which the roller bends downward and thus, as a result of pressing, moves from the fixing position, so that the lid can now be removed. The cuff of the lid can be made in such a way that it was impossible to immediately bend its engaging part up. Instead, said engaging portion is provided with a kind of security seal, for example, in the form of a brittle portion that provides access to the engaging portion only after this portion has been broken off so that this engaging portion can be bent upward. This measure protects the container from unauthorized opening and re-closing.

As shown in FIGS. 3 and 4, the roller 32 is provided with at least one or, preferably, several passages 38 in the form of recesses that extend directly through this roller from the region above this roller to the region below this roller, then between the regions that surround him. This passage or passages are intended to remain open to release air from the area above the roller during the attachment of the lid, as well as to remove air from the container itself, which will be described in more detail below. In the section of FIG. 3, such a passage 38 is shown in full, while in FIG. 4 a section is made through such a passage.

The installation of the cover 3 on the container 2 is carried out using a machine through which the containers are fed to the conveyor, while the cover is fed there to a height exceeding the height of the supplied capacity. Such a machine can be represented by a machine of a type already known in the art, and it will not be described here in detail, while the method itself will be described with reference primarily to FIGS. Figure 5 schematically shows the container 2 and the lid in the initial position for attaching the lid and after the specified container in the previous stage was filled in the filling machine with the appropriate contents, for example, a liquid product such as paint. The container 2 stands vertically, its opening 39 is facing upward, to the lid, which is located directly above it, that is, the axis of rotation 1 of the cover and the axis of rotation of the container coincide. From this position, the lid 3 is lowered down by means of a mechanism (not shown) known in the indicated area, for example a mechanism with vacuum suction cups, until this lid comes into contact with the upper edge 6 of the indicated container. Namely, until this cover falls first with its peripheral roller 32 onto the flange 13 of the edge 6 of the indicated container, as shown in Fig.6. When the cover has reached this position, the lowering pressure device is actuated in the form of a pressure plate 40, which in turn is driven by an actuator providing linear reciprocating movement (not shown, for example, by a pneumatic or hydraulic piston cylinder controlled by a compressed medium). This pressure plate exerts pressure on the upper side of the edge 8 of the lid, that is, on its upwardly facing surfaces, which can be represented by both the upper side 22 of the flange 20 and the upper side 41 of the plastic sleeve 19, which in the above example have the same height around at least most of the circumference of the lid. As shown in the section in figures 1 and 5-9, in this example, the cuff 19 has, for example, two recesses at the top, which is explained, first of all, by the production technology.

As shown, for example, in Fig. 8, the back of the roller 32 also has an inclined surface 42 that extends upward and inward, and the flange 13 on the said container has a circular upper edge 43. With a long pressure movement of the pressure plate 40 downward, this roller will slide around the surface of the flange under the spring action of the cuff 19, until it is under this flange and latches in a closed position under the bottom edge 44 of this flange, as shown in Fig. 9 and on a larger scale in Fig. 2. During all this movement, the volume of air limited by the lid and the container itself is reduced, so that this air is pushed out. This becomes possible according to the invention, which provides for the passage or passages 38 in the roller, which can allow air to pass through them during the whole time that the lid is pressed against the container, even when it is in the closed position. However, in the closed position, the sealing gasket 24 of the lid reaches, in contact with the rim 9, the upper edge of the container of the sealing position with such a prestress that this sealing gasket is slightly compressed to guarantee a high-quality sealing. As a result, the upper side 41 of the cuff 19 is flush with the upper side 22 of the flange 20 or possibly slightly higher than it, while the pressure device is in direct contact with the cuff and, since this cuff is located at a radial distance from the specified capacity, forces arise which provide capping function. This means that the indicated container is sealed and its contents are guaranteed against leakage to the outside and from damage under the influence of outside air. A certain amount of air always remains above the surface 45 of the product contained in the container, because for technical reasons the container can never be completely filled.

The present invention is not limited to the example described above and shown in the accompanying drawings. The number of passes can be various, up to a very large number, for example, in the case when the roller is provided with a transverse groove. Attaching the cuff 19 to the mounting parts 27, 28 of the cover 3 of the steel plate can be performed in various ways. For example, the edge of this plate may extend outward, being directly directed, or it may be curved in a manner different from that shown, for example, it may be curved downward. Alternatively, the container may be made of plastic, and it is also possible that the lid will also be completely plastic when both the sleeve 19 and the closing portion 46 are made of plastic as a single unit. This means that the connecting part in this case is not required, and such a cover will be a single element. It is also possible that the shape of the container will not be symmetrical about its axis of rotation, but will look like a box, but, nevertheless, with rounded corners.

Claims (7)

1. A container in the form of a container (2) and a removable lid (3) for closing and opening the storage space for the product, and at the bottom this container has a base (4) and an outer wall (5) having a peripheral edge (6) on its top which limits the opening (39) of said container, which is closed when a lid is mounted on it, and this lid is a snap-on lid with a closing part (46) and a sleeve (19) that covers the edge (6) of the container opening; moreover, the cuff protrudes downward, and the edge (6) of the container opening has a whisk (9) and a round flange (13) located under this whisk, while the cuff of the said cover springs radially outward and inward and is made with a round locking element (32), which facing the flange located on the container, and which in the position of securing the lid protrudes under this flange and is in contact with the bottom surface of this flange, characterized in that said locking element is made with one or more passages (38) for releasing air from the decree Foot of the container into the environment during the installation of the cover. 2. The container according to claim 1, characterized in that the passages (38) consist of many recesses in the locking element (32), which is made in the form of a round roller, interrupted by these recesses. 3. The container according to claim 1, characterized in that its closing part (46) is made of a metal plate, and the cuff (19) is attached to the mounting part (27, 28) on the peripheral edge of the closing part. 4. The container according to claim 3, characterized in that the mounting part (27, 28) consists of a curved part of the peripheral edge of the closing part (46), which protrudes into the plastic material in the upper part (29) of the cuff (19). 5. The container according to claim 4, characterized in that the lid (3) has a flange (20) that projects upward and forms a groove (47) facing the edge (6) of the opening of the container (2), the upper part (29) the cuff (19) has an upper side (41) that is at the same level or higher than the upper side (22) of the flange (20). 6. A method of installing a removable lid (3) on a container (2) to close the product storage space to form a container having a lower base (4) and an outer wall (5) that is attached to the specified base and has a peripheral edge (6) at the top , restricting the hole (39) in this container, which is closed when the lid is mounted on it, wherein said lid is a snap-on lid having a closing part (46) and a collar (19) that covers the edge (6) of the opening of the indicated container and which protrudes down covers the edge (6) of the hole of the specified capacity, and the edge (6) of the hole of the specified capacity has a whisk (9) and a round flange (13) protruding from the outer wall and located under the specified whisk, and the cuff of the lid is made of flexible plastic material, so that it springs radially outward and inward during attachment and removal of the cover having a round locking element (32), which is directed radially inward and faces the flange located on the container, and which in the attached position of the cover protrudes under the flange and commutes with the lower surface of the flange, comprising the steps of:
placing the cover on the cuff and covering the edge of the hole of the specified capacity, and the round locking element rests on the upper surface of the flange (13),
applying pressure to said cover from above, as a result of which the cuff locking element extends through the container flange and assumes a locking position with constant pressure being applied, and
exhaust air from the container through the passages (38) in the locking element. 7. The method according to claim 6, characterized in that at least part of the pressure on the cover (3) is applied directly to the upper side (41) of the cuff (19).

Images