UA72594C2 - Plastic packaging with closing cover - Google Patents

Abstract

The invention relates to a plastic packaging with a closing cover and a closing element made on the upper face of the packaging for closing of the cover, in which the cover has a circular groove for arrangement in it of the upper face of the packaging. The closing cover has an area, which enters into a close contact with the area of the upper face of the packaging forming a sealing area, and this area has shape of a circular seal located in the groove. The seal is made of material of higher elasticity than the package and/or the cover and forms a whole on the cover by die casting.

Description

sealing belts may be less than the thickness of the container wall. The face of the container can be flat or equipped with one or more annular belts, and their pairs can form a groove that is at least partially engaged with one or more sealing belts. Sealing belts can be placed in different sealing zones, for example, in a horizontal and/or vertical zone or in an angled zone. To ensure the specified sealing effect, the cross-section of the sealing belts does not necessarily have to be exactly the same as the cross-section of the annular grooves of the container face.

The cross-section of the groove of the face of the container may be the same or smaller than the cross-section of the sealing belt to provide conditions in which the groove is completely filled with the sealing elastic belt when the lid is installed in place. The cross-section of the groove can also be larger than the cross-section of the sealing belts in contact, and in this case prevents their lateral displacement. In this case, the problem can be solved thanks to the belt itself. The belt or face limiting the groove may be in close contact with the seal. If necessary, the face of the container can be equipped with one or more sealing belts that come into contact with the punches provided for this purpose in the elastic seal. In particular, the designs of the seal and the face of the container, which come into contact with each other, may not match or complement each other, and the protrusions on the seal do not coincide with the depressions in the face of the container, but rather contact the protrusions on the face of the container, for example, in her side area. This results in a non-interlocking interlock that provides a high degree of tightness. In this case, the height of the sealing belts is preferably less than the thickness of the wall of the container and can be, for example, from 1/2 to 1/5 or even less than this thickness, but without observing a strict limitation within the specified values.

The face of the container can also be equipped with at least one belt for sealing the container, which comes into contact with the zone of the flat surface of the seal. Preferably, the belt has a height at which it, if there is a cover on it, is at least partially or even completely immersed in the seal, the material of which has a greater elasticity than the material of the container.

The seal preferably has such a height or thickness that it synchronously acts as a deformation zone when the force acts on the container or lid in the sealing area, as a result, it is possible to avoid deformation of the harder zones of the lid and container when they are subjected to certain forces.

In order to seal the container when the lid is on it, the horizontal and/or vertical or downwardly angled sealing zone may come into flat contact with part of the surface of the zone or, preferably, with the entire surface of the zone (i.e. along the entire radial extent) of the corresponding contact zones of the container or lids.

Radially outwardly protruding partitions, which can be structurally made in the form of annular belts protruding in the radial direction by an amount smaller than the thickness of the container wall, can be formed as a single unit in the outwardly downward beveled zone of the outer wall of the container adjacent to the upper face of the container. These belts can be made of the same material as the wall of the container, and serve mainly to reduce friction when applying the lid. In this position, they have only a secondary sealing function, which is mainly performed by an elastic seal that deforms under pressure. Two or more annular belts of this type can be located on the outer face of the container. If the cover is in place, the straps preferably provide contact without a gap, but also without any pre-tension, so that the cover fits exactly in the sealing area or is displaced by a slight gap, but without adhering to a strict limit within the mentioned features .

To stabilize the sealing area, a radially protruding reinforcing belt is formed as a single unit, preferably on the outside along the face of the container from the side of the pinching element, located opposite the upper face of the container. The reinforcing belt is mainly located radially around the container. It can also be divided and consist of several reinforcing elements. Alternatively or additionally, one or more reinforcing straps may be integrally formed on the side of the pinchable element opposite or away from the upper face of the container. The thickness, that is, the height and/or width, of the reinforcing belt can be approximately half the thickness of the wall of the container, preferably the thickness of the wall and even more. The location of the reinforcing belt in the immediate vicinity of the elastic seal provides the sealing area of the container with extreme stability. The cover is preferably in contact with the radially located outer side of the reinforcing belt with or without pretension so that the forces acting on the side of the cover are absorbed directly by the reinforcing belt. For this purpose, the radially located outer side of the reinforcing belt may have a flat surface. The space between the reinforcing belt and the pinchable element may be designed to contact the face of the pinchable cover. If necessary, reinforcing belts can be provided inside the container.

The advantage of this technical solution is also that the lid connection, which is pinched, is equally effective after the container has been opened once, i.e. the fixing area and the sealing area are not separated by a zone of thinner material that serves to protect containers, for example, from inept handling, while the lid area must be partially or completely removed or crumpled to open the container. The clip-on element may be provided directly on the upper edge of the container or away from it, for example, on an outwardly projecting edge. The clip-on element for connecting the lid is located, preferably, on the outer wall of the container, and if necessary - also inside.

The cover preferably has an outwardly facing sliding slope which can be attached to the upper edge of the cover or to an area located below, preferably in a vertical section. The sliding inclined surface can be located immediately above the reinforcing belt placed above the pinchable element on the outer wall of the container and at a slight distance from it. The sliding inclined surface can be radially connected flush with the pinching face of the lid from the outside or beyond it, although a more acceptable option is its radial extension beyond the zones extending from the wall of the container.

Preferably, the upper edge of the container has an annular edge zone extending radially outward and facing downwards, on which a clip-on element is integrally formed. In this case, the reinforcing belt formed integrally above the clip element and facing outwards can also be integrally formed on the annular edge of the container, further reinforcing It, and/or over the area of the annular edge, just on the wall of the container. Due to the presence of a downward facing section of the edge, which is located at a distance from the wall of the container, the section of fixation by the pinching method is isolated from the sealing zone in relation to the acting forces.

The downward-facing part of the annular edge is preferably attached in the area of the upper edge of the container, that is, at the height of the sealing area or at a distance that is several times greater than the wall thickness, for example, one or two times, but this condition is not limiting.

The container preferably has a radially outwardly downwardly extending rim portion that is located below the lid when on the container and extends radially toward and beyond the lid. This section of the annular edge can be formed as a whole separately on the wall of the container and in this case is connected flush with the lower edge of the section of the annular edge with the face that is pinched, or is at a distance from it in height. This section of the ring edge is structurally made, preferably, as a continuation of the edge zone, which forms an element that is pinched, that is, in the form of a shoulder that extends outward and down.

In this area, a suitable seal can be provided, which protects against inept handling of the container.

The lower edge of the cover can be located on a section of this edge with or without pretension or with a slight gap relative to this section, preferably in such a way that it is impossible to reach the lower edge of the cover manually from below. This section of the annular rim may have a radial taper to partially or fully accommodate the lower edge of the lid.

The annular rim zone or zones may be reinforced with vertical stiffeners which may be located within the rim zone and attached to the outer wall of the container. Reinforcing stiffeners, preferably, are equipped with a groove or notch in their lower part, thanks to which the edge zone retains a certain elasticity and can function as a deformation zone.

The lid preferably has an annular zone which is vertically and/or radially spaced from the elastic seal and closely contacts the inner wall of the container when the lid is in place.

This annular zone can be made of the same material as the cover. Structurally, the ring zone can be made in the form of, for example, a belt extending down, or a shoulder strap on the underside of the cover. At the same time, it is located, preferably, above the recess in the wall of the container, if the lid is out of place. When the lid is in place, the zone section can rest on the recess or be at a certain distance from it, preferably so that the underside of the lid belt or shoulder rests on the container recess when successive containers are placed on top of the package or when external forces are applied. In this case, the lid zone can be in close contact with the preferably vertical zone of the container by the type of linear contact or by height in the vertical plane, preferably at the height of the reinforcing belt or pinching face from the outer side of the container.

To increase the reliability of sealing the container, a ledge extending upwards beyond the lower edge of the belt can be located on the inner side of the container, located radially inward with respect to the annular zone or a belt in the form of a partition, which is integrally formed on the inner side of the lid. For this purpose, separate protrusions or partitions distributed along the periphery may be provided. This zone mainly acts as an annular belt. The height of this belt, which prevents displacement inside the lid belt, is preferably smaller in size than the thickness of the container wall or the lid belt, but this feature is not strictly without alternatives. The upwardly extending container areas may be slightly offset to the side or contact the side of the lid belt with or without pretension. In this case, the cover belt can also be installed by a press fit between the radially adjacent zones of the container, both on its inner and outer sides.

A protrusion on the inner wall of the container located below the belt, or a protrusion of the lid or similar element may be located approximately at the height of the element to be pinched or the reinforcing belt or at a distance that is one or more times the thickness of the wall of the container.

To stabilize the sealing area, preferably at the very beginning of the radially inward region of the container wall, the lid may be equipped with at least one radially inward projection that may be integrally formed on the upper side of the lid. The protrusion or protrusions can be ring-shaped, box-shaped (for example, in the form of a cube or prism), or in the form of partitions, which is not a mandatory condition for establishing the fact of using the invention. Reinforcing straps may be provided internally to provide stability to annular or box-shaped projections.

The upper side of the projection(s) is spaced with a gap preferably above the lid area in close contact with the inner wall of the container, where the contact in the vertical direction may actually be punctate or linear. The cross-section of the protrusions can have the form of a truncated (asymmetric) triangle or rectangle, in which the upper and/or lower edge of the lateral sides of the protrusions can be beveled down inside the container. The radially inward end wall of the protrusions can be vertical or located at an angle. The protrusions can be integrally formed on the upper face of the lid. The upper face of the protrusions is preferably located below the upper face of the lid, thus forming another protrusion. This makes it unnecessary to form a single element at the height of the sealing area on the inner side of the container, which could lead to the appearance of stresses in the material or to deformation, for example, due to warping.

The protrusions facing the center of the lid are structurally designed in such a way that in the sealing area it is possible to completely or to a large extent avoid the contact of the vertically protruding surfaces with the annular sealing belt. This also applies to lateral (transverse) surfaces on protrusions or protrusions in the form of partitions. For this purpose, protrusions may be provided extending over a relatively large part of the periphery, or, preferably, a radial annular belt on the inner side of the cover. In this case, the lateral surfaces of the protrusions can be located with a radial clearance relative to the sealing area on the upper side of the protrusions, and looking at the cover from below, an annular groove with a trapezoidal or triangular cross-section and inwardly facing wider zones can be observed.

The protrusions, in particular the annular peripheral protrusion, can also be reinforced with internal belts, which preferably end at some radial distance from the sealing or support belt, in contact with or resting on the inner wall of the container at some distance from the sealing zone of this belt.

In this case, the upper side of the protrusions may contact the inner face of the lid in a horizontal plane, preferably at a downward slope of less than 15", eg, 5", inside the container.

The cover surface protecting the container from opening can be located at or below the internal sealing area, preferably at or below the pinchable element.

A drain device may be provided on the lid, occupying, preferably, approximately one-fourth of the diameter of the lid surface. Such a design has a container designed for pouring liquid.

Below is a description of an example of the implementation of the invention with references to illustrative material:

Figure 1 shows a cross-section of a container with a lid, according to the invention, on which there is another container that is part of a block that is transported or stored.

Figure 2 shows a detailed image of the container with a lid shown in Figure 1.

Figure 3 shows a cross-section of the container shown in Figure 1.

Figure 4 shows a top view of the lidded container shown in Figure 1.

Figure 5 shows a diagram of a set of covers, according to Figure 1.

Figure 1 shows a plastic container 1, made by injection molding, with a snap-on cover 2 on it, and a flat zone is provided on the upper face 4 of the outer wall C of the container. The upper face 4 is connected to the annular edge 5, which extends radially, on which an integrally protruding outwardly clipped element 6 is formed, which is engaged from below with an annular clipped element 7. The element 7 of the cover is made with a protrusion in the form of a hook. The areas of the lid and container that are clipped together are structurally designed without rounded outer edges and are located in a horizontal plane, resulting in an extremely reliable connection when interacting during the clip connection. The elements of the container and the lid, which are clipped, can be made at an angle outward and downward, which increases the degree of mutual blocking during pairing.

The section of the cover 2, which is connected to the upper face 4 of the container, is structurally made in the form of a groove or channel, in which the outer side surface 8 of the groove 34 with its side surface contacts two belts 9 located on the surface of the container with a vertical gap. The radial length of the belts 9 is significantly less than the thickness of the container wall and is approximately one third in this embodiment. Due to the rounded upper edge of the belt 9 and the small width of the belts, the lid can be easily put on the container, even if it is in very close contact with the face of the container. In this case, the belts 9 are located at the height of the sealing section 12, and the lid can rest on the outer wall of the container at this height with little or no pretension, even in the absence of these belts.

The seal 11, made of an elastic and compressible rubber material, is introduced as a single part having sections 11a and 12, and is located on the horizontal base of the groove in the cover and on the radially adjacent side surface 10. In order to increase the bonding ability of the bonding material, the base of the groove and the contact zone of the rubber seal are equipped with overlapping ridges and depressions. The sealing section 12, connected to the inner side surface 10, is at an angle to the vertical plane, in this example of implementation - at an angle of approximately 20", and this angle can vary from 5 to 45", without being strictly limited by the specified values. When the lid is placed on the container, the angled sealing portion 12 of the seal 11 rests on the sloping surface 13, extending downwards, which abuts the inner surface of the upper face 4 of the container (see also

Fig. 2 and 3), and the angle of inclination of which corresponds to the angle of inclination of the contact surface of the sealing section 12 of the seal, without strict limitation by the specified feature. As a result of using a seal of this design, the container remains hermetically closed even when significant forces are applied to the edge of the container. The area of the cover surrounding the sealing area 12 of the seal from the inside is also structurally made with an inclined surface.

The annular edge 5 of the container is attached at the height of the upper face 4 in such a way that the boundaries of the cavity 14, determined by the edge 5, extend directly to the surface of the upper face, that is, to the surface that determines the thickness of the wall. The section of the upper face of the 4 tare is structurally made with an O-shaped ring profile.

The vertical support of the upper face 4 of the container with an O-ring profile is deflected outward by the inclined surface 15, located at an angle of approximately 30" to the horizontal plane, thus forming a stepped shoulder. The clip-on element b is integrally formed in the area, located below the shoulder strap, where a radially protruding reinforcing belt 16 is formed as a whole, is placed between the clip-on face and the shoulder strap at the height of the shoulder strap, which in this embodiment is directed outwards, is located flush with the clip-on element 6, and has a corresponding width, i.e. the length in the vertical plane. The lower edge of the reinforcing belt 16 structurally corresponds to the lower edge of the clip element 6, so that the clip element 7 of the cover could also come into contact with the groove located between the element b and the belt 16. for this purpose, the upper edge of the clip-on element 6 is also bevelled outwards downwards. that is, the face of the cover rests on the outer face of the clip-on element 6, which strengthens the belt 16 and both belts 9, where a slight gap is provided between the inclined surface 15 and the sliding inclined surface 17 of the fitted cover.

The sliding inclined surface 17 can also be placed above the lower face of the rim of the lid surrounding the upper face of the container, to form a wall extending downwards towards the inclined surface 15, which can also rest on the inclined surface 15 or its horizontal section.

The annular edge 5 below the clip-on element 7 has an annular ledge 18 that extends from the clip-on element 7 to the outer edge of the cover 2. The clip-on element 7 can rest on the pre-tensioned ledge 8 or a gap may be provided between the clip-on element and the ledge. The ledge 18 has a seal 19, which protects against inept handling of the container, after removing which the element 7, which is pinched, can be manually captured from below, and the lid is pulled back (removed). A number of tear-off tabs may also be provided, which adjoin or are located over a fairly large area of the periphery of the container. If necessary, a protective seal can also be attached to the clip-on element 7. It should be noted that the area of the cover between the sealing groove and the clamped element preferably does not have areas with a significant decrease in material thickness, which ensures high stability and, therefore, a high degree of tightness between the clamped connection and the seal 11 or in the area of the lid located inside the container 1.

The lid is equipped with an annular zone 20, located on the inner side relative to the seal 11, which is in close contact only with the inner wall of the container at some part of its height, where, according to this example of implementation, the lower end of the zone forms a sealing section, which is located approximately at the height the location of the reinforcing belt 16 or the face that is pinched. The zone 20 extending vertically downward is located at the height of the inwardly directed ledge 22 of the inner wall of the container and at a slight distance from it in the vertical plane. If there is a slight vertical force applied to the cover, the zone 20 rests on the depression 21. If the sealing function is dosed, as an alternative separate downward-facing protrusions of the type of partitions can be provided. The recess 21 is limited by a ledge 22, on the site of which separate protrusions can also be located, while the ledge 22 rises above the lower edge of the zone 20 and prevents the movement of the zone 20 inwardly. The zone 20 can also be installed by a press fit between the ledge 22 and the zone of the container wall adjacent to it from the outside.

The sealing part of the zone 20 (see Fig. 2) is formed due to the fact that the zone 20 slightly bends outward, and the dimensions are chosen in such a way that its lower face 35 can come into contact with the inner wall of the container, resting on it from the outside in the radial direction , when the cover is removed. In this case, the thickness of the lower edge approximately corresponds to the thickness of the zone, preferably more than 1/4 of its value, while in this area it is characterized by a slight taper. As a result, when the lid is on the container, a pre-tensioned radial contact with the inner wall of the container is achieved. When the cover is removed, the ledge is less than the thickness of the belt in this area, and its value is approximately 1/4 of the thickness of the lower face.

An annular inner face 23, having a slight inward slope, is integrally formed on the zone 20 above the sealing zone. On it, inwardly facing inclined surfaces 24, or in some places with a wider face, zones 25 of the vertical wall are formed on it in the form of segments that pass into the horizontal zone 26 of the cover. Zone 26 is located below the snap element b, where its outer diameter, as shown, is designed to accommodate a stack of containers. The result of this is the formation of protrusions with a triangular cross-section, which are formed as a whole on a trapezoidal groove, open in the direction of the bottom.

In order to activate the improved process of force distribution and, at the same time, to increase the efficiency of stacking containers into sets, and containers without lids are located inside each other, the outer wall

The container has a taper or is inclined at an angle of less than 3", preferably 27, although a smaller angle is also possible. To better absorb the forces arising in the area of the face, when the container with lids is folded into bags, the distance between the wall of 25 projections facing the center container and located opposite the outer wall of the container 27, calculated in such a way as to provide only a slight gap between them, for example, 2 mm, preferably 1 mm.

As shown in the enlarged schematic view (Figs. 2 and 3), the upper face 4 of the edge of the container is equipped with two sealing belts 36, which engage the indentations on the lower part of the seal 11, where some of the downwardly projecting belts 37 of the sealing indentations come into contact with belts 36 on the upper face of the container, for example, in the area of their side surfaces, protecting in this way the belts 37 from lateral displacement, and some of the belts are forced to contact with the neighboring ones in relation to the belts 36 in the groove formed between them or on the side on the face 4 of the container. Such an incompatible design of two structures gives the container a high degree of tightness.

As shown in the drawings, vertical stiffeners 38 are provided in the cavity 14, which are located perpendicular to the outer wall and have recesses 33, open in the direction of the bottom, while the top of the recess is shifted towards the outer wall of the container.

As shown in Fig. 4, the annular inner face 23 of the lid, which is located on the inner wall of the container, is equipped with protrusions 28, 29 of different radial widths, which provides an effective reinforcing profile, absorbing forces arising in the sealing zone 20 or sealing 11.

According to this embodiment, the peripheral extension of the protrusions 28,29 is a multiple of their width.

The protrusions have a box shape. The inclined surface 24 and the zones of the vertical wall 25 end at the same distance from the main axis of the container, while the zones 30, which limit the side of the inclined surface 24, are inclined towards the periphery of the lid. A closable drain device, which occupies an area of one quarter of the diameter of the container, is also placed in the horizontal zone 26 of the lid. As shown in the schematic representation of the package assembly in Fig. 5, the lower edge of the element 7, which is pinched, the lid rests on the sliding inclined surface 17, and the lower face 35 of the annular zone 20 rests on the horizontal support 31 of the groove 34, which holds the seal 11. The lower edge of the box-shaped protrusions 32 can optionally or additionally rest on the upper edge of the lid protrusion located below.

List of items 1 Container 2 Lid

From Container wall 4 Upper face

Ring for country 6, 7 Clip-on element 8 Outer side surface 9 Belt

Side surface

11 Sealing 11a Sealing area 12 Sealing area 13 Inclined surface 14 Cavity

Inclined surface 16 Reinforcing belt 17 Sliding inclined surface 18 Ring ledge 19 Seal that protects against inept handling

Annular zone 21 Indentation 22 Step 23 Annular inner face 24 Inclined surface

Vertical wall 26 Central zone 27 Outer wall 28,29 Projection

Zone 31 Horizontal support 32 Lower face 33 Notch 34 Annular groove

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