RU177063U1 - PLASTIC COVER - Google Patents

Abstract

A plastic lid is intended for use in corking cans used in the food industry. Due to the development of industry and the presence of competition in the market for the production of plastic products, it becomes necessary to expand the types of means for corking cans, while such a plastic lid should hermetically seal a larger jar, than the lid itself. In connection with this need, a plastic cover of a special geometric shape has been created. This geometric shape is expressed in the following: the plastic cover is created in a round shape, has a predominantly flat top with a thickness of 0.8 ± 0.6 mm, on which there is a small side that prevents the cans from rolling when stored a column and extending downward from the edge of the upper part, a neck with a thickness of 0.4 mm ± 0.25 mm of a rounded shape passing into a skirt (a neck in this description means a rounded corner connecting the upper flat and the side th of the plastic cover. Under the skirt herein refers to the side of the plastic lid). The skirt ends with a special inner ring with a thickness of 0.4 to 0.8 mm, inclusive, which is the mounting flange and protrudes into the inside of the plastic cover and serves to be fixed on the bank. In this case, the jar on the edge of the upper part should be equipped with a small side protruding outward to secure the plastic cover. The skirt goes down the cover from the edge of the neck of the plastic cover at an angle of 93 ± 5 degrees, this angle is rounded from the outside with a radius of 1.5 ± 1.4 mm. The height of the plastic cover is designed from the flat base of the top to the lower plane of the mounting flange on the bottom of the skirt, this value depends on the size of the seam of the can or protruding neck of the can. The plastic cover is made of polymeric materials (high molecular weight polyethylene, low pressure polyethylene, polypropylene, their mixture in different ratios is also acceptable).

Description

The technical field to which the utility model belongs.

A plastic lid is used to seal (close) metal, plastic, paper cans having a rolled bottom, including having a diameter larger or smaller than necessary.

The level of technology.

Reusable plastic lids and paper covers used in the household, in the manufacture of food products for capping metal cans are widely known in the art. Such covers have a top and a skirt extending from it and are made with the possibility of tight installation on metal cans with a diameter of 52.5 mm; 65.0 mm; 72.8 mm, 73.0 mm, 83.4 mm; 99.0 mm; by clicking on their neck.

To date, the following analogs of the plastic cover are known:

- patent for utility model RU 159298 (information on this patent was obtained from the official website of the Federal Institute of Industrial Property, located at: http://www1.fips.ru/) .;

- patent for utility model RU 2308404 (information on this patent was obtained from the official website of the Federal Institute of Industrial Property, located at: http://www1.fips.ru/).

Russian patent RU 159298 reflects a lid for closing small containers (presumably metal cans) made of multilayer paper, suitable for reuse. A distinctive feature of this lid is the presence of a two-level wall providing the possibility and convenience of stacking the lids, as well as the presence of an annular groove at the side wall of the first level for landing on the neck of the can. The disadvantage of this model is its low strength, lack of ability to reuse, because paper is not a particularly strong material; this lid should not be used to cover jars containing food products, as this contradicts the hygienic requirements for containers and packaging of food products. The presence of an annular groove at the side wall and the material from which the lid is made will not allow a jar of a larger diameter to be sealed than the corresponding diameter of the lid, as the groove is designed for precise fit on the very neck of the can, and when the neck of the can is enlarged, the lid will not seal the can, and the multilayer paper-based material will be damaged, because does not possess strength and elasticity.

Russian patent RU 2308404 discloses a lid mounted on a metal can with a drink, in which a hinge ring is integrated, which allows fixing this lid on the upper part of the can. The disadvantage of this model is the inconvenience of its use, the difficulty in production and the inability to seal the bank. As the author points out, a distinctive part of this utility model is the presence of a ring pivotally connected to the skirt with a plastic cover for firm fixation on the neck of the can, which is one of the main goals of this cover. However, this ring will not allow such a lid to seal a jar of a larger diameter than the diameter of the lid, as the ring must be rigid with minimal elasticity otherwise there will be no strong fixation.

Thus, the utility models indicated above are inconvenient and costly for mass production, do not provide ease of use by the consumer, and do not allow hermetically corking a jar with a neck diameter larger than necessary.

Disclosure of a utility model.

The technical problem that the utility model addresses is the creation of a plastic lid that can hermetically seal cans with a larger neck diameter without damaging the plastic lid itself.

The set of essential features of a plastic cover.

The existing technical problem is solved by creating a plastic lid with a special geometric shape for capping cans. This geometric shape is expressed in the following: The plastic lid is round in shape, has a predominantly flat top with a thickness of 0.8 ± 0.6 mm, on which there is a small side that prevents the cans from rolling when stacked in a column and the neck, extending down from the edge of the upper part, is thick 0.4 mm ± 0.25 mm of a rounded shape passing into a skirt (the neck in this description refers to the rounded corner connecting the upper flat and side parts of the plastic cover. The skirt in the present description refers to the side part of the Plast egg cover). The skirt ends with a special inner ring with a thickness of 0.4 to 0.8 mm, inclusive, which is the mounting flange and protrudes into the inside of the plastic cover and serves to be fixed on the bank. In this case, the jar on the edge of the upper part should be equipped with a small side protruding outward to secure the plastic cover. The skirt goes down the cover from the edge of the neck of the plastic cover at an angle of 93 ± 5 degrees, this angle is rounded from the outside with a radius of 1.5 ± 1.4 mm. The height of the plastic cover is designed from the flat base of the top to the lower plane of the mounting flange on the bottom of the skirt, this value depends on the size of the seam of the can or protruding neck of the can. The plastic cover is made of polymeric materials (high molecular weight polyethylene, low pressure polyethylene, polypropylene, their mixture in different ratios is also acceptable).

It should be noted that such features of a utility model as:

- the plastic cover has a ring with a thickness of 0.4 to 0.8 mm inclusive, which is the mounting flange and located on the inner lower part of the skirt;

- the plastic cover has a flat top, paired with a neck with a thickness of 0.4 ± 0.25 mm;

- a skirt located at an angle of 93 ± 5 degrees to the top of the plastic cover; this angle is rounded from the outside in the neck under a radius of 1.5 ± 1.4 mm.

necessary to achieve a technical result, namely: capping of a can with a neck diameter larger than necessary without damaging the integrity of the plastic lid (prevents cracking, deformation of the lock, warpage) without affecting the appearance.

Empirically, it was found that the mounting flange in size from 0.4 to 0.8 mm inclusive, located on the inner lower part of the skirt is moderately elastic due to the thickness from 0.4 to 0.8 mm. Increasing or decreasing this size even by 0.1 mm, such elasticity is lost, and the lid either does not seal the jar with a large neck diameter, or this rupture breaks or cracks form on it. The location of the side on the lower part of the skirt is also due to the fact that only with this arrangement when closing the jar with a larger or smaller diameter of the neck, the lower part of the skirt will not be damaged. Trying to seal a can of a larger size, despite the fact that the side of the plastic cover is not located on the bottom of the skirt, but above it, the main lower resistance falls on the remaining bottom of the skirt and this part simply breaks or cracks appear on it. And if you try to seal a jar of a smaller size despite the fact that the side of the plastic cover is not on the bottom of the skirt, then the lid is not tightly attached to the bank, because the rest of the skirt (the part that is below the rim) does not allow the lid to narrow to the diameter of the can.

The location of the mounting flange on the bottom of the skirt is also important in the manufacture of a plastic cover by injection molding. So, in the manufacture of plastic products by injection molding, there is volumetric horizontal and vertical shrinkage of the product. This phenomenon is due to the laws of physics on the expansion and contraction of substances and materials, respectively, when heated and cooled. Horizontal shrinkage occurs more in places of greater accumulation of material in the proposed plastic cover, such a place is a skirt with a fastening side. The smallest shrinkage occurs in places of the smallest accumulation of material, namely: the neck and the flat top of the plastic cover. After the casting cycle of the plastic cover is completed, it cools and contracts. The compression mainly occurs at the location of the mounting flange, and, as a result, the diameter of the plastic cover in the area of the mounting flange narrows, but the neck is not damaged, because its size is 0.4 ± 0.25 mm and makes it flexible and resistant to damage when bending or increasing the circumference of the mounting flange.

The neck thickness is 0.4 ± 0.25 mm, as well as the skirt located at an angle of 93 ± 5 degrees to the top of the plastic cover and the corner rounded from the outside in the neck with a radius of 1.5 ± 1.4 mm allows you to bend the skirt of the plastic cover to a greater distance when capping jars with a large neck diameter without damaging the neck itself, both from the outside and from the inside. These sizes were also obtained experimentally, while it was noticed that when changing these sizes up or down, the plastic cover either did not put on at all (if the angle of the skirt relative to the top of the plastic cover was reduced), or it was not tight (in the case of increasing the angle of the skirt relative to the plastic cover). With an increase in the neck thickness, the plastic lid was not worn on a jar with a neck diameter larger than the diameter of the lid, and with a decrease, the neck warps, cracks remain on it, which adversely affects the tightness and appearance of the plastic lid.

If you reduce or increase the radius of curvature of the neck, and also completely eliminate it by making the connection of the upper part of the lid and skirt carbon, then when corking a jar with a neck larger than the diameter corresponding to the plastic lid, the neck also suffered damage in the form of cracks, warping or creases .

Therefore, all of these dimensions and geometric shapes were carefully verified when creating a plastic lid that allows you to seal the jar with a neck diameter larger than necessary. Therefore, only subject to the indicated signs, the plastic lid will hermetically seal cans with a diameter larger than necessary without damaging the integrity of the plastic lid (without cracks, deformation of the lock, warping, creases) and without affecting the appearance.

To determine the values of numerical parameters that express some essential features of a utility model, namely:

flat top 0.8 ± 0.6 mm thick;

neck 0.4 mm thick ± 0.25 mm;

an inner ring with a thickness of 0.4 to 0.8 mm inclusive, which is the mounting flange;

an angle of 93 ± 5 degrees, at which the skirt goes down the cover from the edge of the neck of the plastic cover;

the angle at which the skirt goes down the cap from the edge of the neck of the plastic cap is rounded from the outside under a radius of 1.5 ± 1.4 mm.

The following methods are used:

Method number 1. According to this method, the measurement of values of numerical parameters is carried out using measuring mechanical devices, namely:

- calipers made in accordance with GOST 166-89; magnifying glasses for more accurate placement of vernier caliper jaws on the measured part of the Utility Model; sharp blades.

By this method, it is possible to measure only linear dimensions, such as: an inner ring with a thickness of 0.4 to 0.8 mm inclusive, which is the mounting flange, and a flat top with a thickness of 0.8 ± 0.6 mm.

An inner ring with a thickness of 0.4 to 0.8 mm is inclusively measured using any caliper on a whole (not cut) plastic cover by applying sponges for external measurements of the caliper to the measured part of the utility model, and the distance from the left edge of the side to the right edge of the side is determined when viewed from the side (the left and right edges of the side should not be confused with the top and bottom of the side, because the top of the side is closer to the top of the plastic cover, and the bottom of the side is the bottom plane skirts). The side view is shown in figure No. 3 and figure No. 4.

To measure a flat top with a thickness of 0.8 ± 0.6 mm, it is necessary to cut the plastic cover along with a sharp blade without damaging the edges formed when cutting. After cutting, 2 halves of the plastic cover will be obtained. To measure a flat top with a thickness of 0.8 ± 0.6 mm, a caliper must be attached to the upper part (the upper part is indicated in the figures under the number 1) so that the jaws for external measurements capture the upper and lower parts of the upper part of the plastic cover.

To measure other parameters, it is necessary to use method No. 2.

Method number 2. This method consists in measuring the values of numerical parameters with the help of electronic computing devices, for example, a quality control complex for rolling the seam seam of tin cans KZSh-12.1, which consists of a special microprojector V1.2 and an electronic computer (computer). Using these devices, it is possible to calculate all the parameters of the numerical values that determine some of the essential features of a plastic cover.

To determine any parameter of the numerical value that expresses some essential features of the utility model, it is necessary to cut the plastic cover along with a sharp blade without damaging the edges formed during cutting. After cutting, you get 2 halves of a utility model. Any of the resulting halves must be put into the microprojector with the cut part and all the numerical values will be reflected in the computer, including a flat top with a thickness of 0.8 ± 0.6 mm; neck 0.4 mm thick ± 0.25 mm; an inner ring with a thickness of 0.4 to 0.8 mm inclusive, which is the mounting flange; an angle of 93 ± 5 degrees, at which the skirt goes down the cover from the edge of the neck of the plastic cover and the angle at which the skirt goes down the cover from the edge of the neck of the plastic cover, is rounded from the outside under a radius of 1.5 ± 1.4 mm. It should be borne in mind that:

- when determining a flat top with a thickness of 0.8 ± 0.6 mm, the distance between the edges of the upper and lower parts of the flat top looks;

- when determining the size of the neck with a thickness of 0.4 mm ± 0.25 mm, the distance from the inside of the neck to the outside looks;

- when determining the size of the inner ring with a thickness of 0.4 to 0.8 mm inclusive, the distance from the left to the right edge of the side looks;

- when determining the angle of 93 ± 5 degrees, under which the skirt goes down the cover from the edge of the neck of the plastic cover, the radius formed between the upper part of the plastic cover (excluding the edge located on the top of the plastic cover) and the outer plane of the skirt look.

In the method No. 2 describes one of the possible examples of electronic computing complex. However, for the application of method No. 2, it is possible to use other electronic computing systems having a device for scanning the plane of the cut part of the utility model and transferring the parameters of this plane to a computer.

A brief description of the drawings.

The figure No. 1 shows a plastic cover - top view. The figure No. 2 shows a plastic cover - a view from the bottom. The figure No. 3 shows a plastic cover - side view. The figure No. 4 shows a plastic cover - a side view in section. The figure No. 5 shows the principle of operation of the plastic cover. The figure No. 6 shows the effect of volumetric shrinkage on the skirt of the plastic cover. The figure No. 7 shows the action of a conventional plastic lid when corking a can with a smaller neck diameter than the inner diameter of the lid. The figure No. 8 shows the effect of the claimed plastic lid when capping jars with a neck diameter smaller than the inner diameter of the lid. The figure No. 9 shows the action of a conventional plastic lid when corking a can with a neck diameter larger than the inner diameter of the lid. The figure No. 10 shows the effect of the claimed plastic lid when capping jars with a neck diameter smaller than the inner diameter of the lid.

Utility Model Implementation

The proposed plastic lid can be used for hermetic sealing as a regular can, however, cans in which the neck may be larger or smaller than the inner diameter of the lid. Similar cases with banks are encountered with inaccurate setup of equipment for the production of cans, wear and tear of such equipment, low-quality material from which the cans are made. However, the manufacturer, when supplying such cans, is not able to check each can and measure the diameter of its neck. Therefore, to save time and money, such a manufacturer can use the proposed plastic cover.

In accordance with the description, a plastic lid can be used for cans (6) of metal sheet, plastic, paper, glass containing a fastening edge (7) at the end of the upper part from a height of 2.5 mm to 6 mm, for which the ring, which is a fastener, is hermetically fastened the edge of the plastic cover (4) located on the inner lower part of the skirt (3) and forms a lock (9).

The flange located on the top of the lid (2) may be in the form of a ring, as shown in FIG. No. 1.

A label of a biaxially oriented polypropylene film or foamed polypropylene with a thickness of 35-80 microns, equal to the outer diameter of the plastic cover or the inner diameter of the side (2), can be soldered onto the upper plane of the plastic cover (1). This label can be used to decorate and give better abrasion and stiffness properties of the plastic cover.

In accordance with the description and as shown in the accompanying drawings, the plastic cover is made of a plastic material, transparent or opaque, and contains a neck (5), which is adjacent to the seam (7) and the neck (8) located on the top of the can.

In the shown construction, the lower part of the skirt (3) includes a mounting flange (4) located along the inner lower edge and extending over the entire diameter of the skirt (3). Due to the side (4) of the skirt (3), the plastic cover is attached to the can (6) and due to the same side, the cover is gripped when removed from the can (6).

Using the edge (4) of the skirt (3) provides easy movement of the neck (5) from its position in the lock (9) and the lid is regulated and gradually opened, first in the area adjacent to the mounting edge (7) of the can (6), and then in the remaining part of the lock (9), preventing the unintentional release of the stored product from the can and maintaining the integrity of the plastic lid.

The figure No. 6 shows the effect of volumetric shrinkage when cooling the finished product. This shrinkage is clearly visible relative to the projection line (10). The figure on the left in figure No. 6 shows a plastic cover in size with a mounting flange (4), a skirt (3), a neck (5) and a flat top (1) with a flange (2) before cooling. In the figure, located on the right in figure No. 6, the same plastic cover with the same elements is indicated, but after cooling. As you can see from these 2 figures in figure No. 6, after volumetric shrinkage occurs, only the skirt (3) with the mounting side (4) narrows and shifts to the left relative to the projection line (10), and the neck (5) and the flat top (1 ) with the edge (2) remain intact.

Figure 7 and Figure 8 show what a jar looks like with a smaller neck diameter than the diameter of a lid sealed with a conventional lid (Figure No. 7) and sealed with the claimed plastic lid (Figure 8). As can be seen in figure No. 7, the lid does not fit snugly on the can, the skirt remains in the same position, because of which there is a distance between the can of the can (6) and the fastening flange of the cap (4) and the skirt (3), which leads to a lack of tightness. From figure No. 8 it can be seen that the skirt (3) and the fastening flange (4) of the plastic cover fit snugly against the flange of the can (6) and form a tight and tight connection.

Figure 7 and Figure 8 show what a jar looks like with a larger neck diameter than the diameter of the lid, sealed with a conventional lid (Figure 9) and sealed with the claimed plastic lid (Figure 10). As can be seen in figure 9, the skirt (3) and the fastening flange (4) are unevenly attached to the flange of the can (6), a large load occurs on the neck (5), as a result of which cracks, warping, deformation appear on the neck (5), which leads to loose connections, lack of tightness and damage to the lid itself. It can be seen from figure 10 that the skirt (3) and the fastening flange (4) tightly surround the flank of the can (6), and the neck (5) contributes to the curvature of the skirt (3) without any damage and as a result a tight connection is formed.

Despite the fact that the utility model has been described in accordance with the embodiment of the can having only one structural form, it should be understood that changes can be made without going beyond the scope of the protection defined in the attached formula of the utility model.

Claims (3)

1. A plastic lid made of a polymeric material, containing a round top with a skirt extending downward from the edge of the lid, characterized in that the plastic lid has a fastening flange with a thickness of 0.4 to 0.8 mm inclusive, located on the inner lower part of the skirt ; the top is mated with a neck with a thickness of 0.4 ± 0.25 mm; the neck moves down from the top edge and goes into a skirt located at an angle of 93 ± 5 degrees to the top of the top; this connection is rounded from the outside in the neck under a radius of 1.5 ± 1.4 mm. 2. The plastic cover according to claim 1, characterized in that the thickness of the top is 0.8 ± 0.6 mm. 3. The plastic cover according to claim 1, characterized in that the top has a protruding side up.

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