RU2554010C2 - Container for storing liquid - Google Patents

Abstract

FIELD: packaging industry.

SUBSTANCE: invention relates to a container for storing liquid such as paint. The container comprises a cover and a housing which has a wall forming an open end. The cover has a seal made with the ability to seal the open end of the housing when the container is closed. The cover has a cover wall located adjacent to the housing wall part to form the channel ending at the seal. One or both of the adjacent wall parts of the housing and the cover wall additionally form the chamber made with the ability to interrupt any movement of liquid before it reaches the seal. At least a part of the housing and/or cover of the container is made of metal, and the profile of the chamber is obtained by the rolling process.

EFFECT: chamber is used to prevent capillary seepage of liquid into the area adjacent the seal, thus eliminating the subsequent problems with opening the cover.

7 cl, 5 dwg

Description

Technical field

The present invention relates to a metal container for storing liquids, in particular, but not exclusively, for liquids such as paint and oil used in everyday life. Typically, such containers have a volume of 20 liters or less.

State of the art

Metal paint containers are widely known having a housing with a base connected by a seaming seam or made integrally, and optionally with a metal ring that is connected by a seam connection to the open end of the housing, as well as an insert cover that can be opened by hand or with a tool, for example a screwdriver .

In WO 2006/089819 A (CROWW PACKAGING TECHNOLOGY) of January 17, 2006, the present applicant describes a lid structure consisting of a metal disc and a plastic ring that facilitates manual removal of a lid from a filled container. Subsequent application WO 2008/125639 (CROWW PACKAGING TECHNOLOGY) of 04/11/2008 relates to a modification of the cover structure so that it meets the regulatory requirements for increased resistance to violations of the operating rules when dangerous goods are in the container.

If used, a “composition” or “coating” is often used to create a primary seal between the lid and the body or metal ring of the container, which prevents oxygen from entering the container and the product contained therein (which may cause a film to form on the surface of the contents) and foreign objects such as insects. This seal is airtight and prevents the loss of moisture and / or solvent vapor from the paint. In addition, this composition prevents leakage of the product from the container.

In the process of painting, the container is rotated cyclically and subjected to vibrations to ensure adequate mixing of colors, which leads to spraying of the product and its "capillary flowing" in the area located next to such a composition. Later, paint sprays dry out and make it difficult for the user to manually open the container. This problem also occurs when the container is transported as a result of accompanying vibrations.

Capillary leakage or the capillary effect, as is more known, is the tendency of a liquid to rise through thin tubes or flow into small holes, for example, those that exist between grains of rock. This is the result of the attraction of liquid and solid molecules and is an important process of transferring nutrients and other substances from one place to another in plants and animals.

Disclosure of invention

The liquid storage container includes a lid and a housing, wherein

- the housing has a housing wall defining an open end, and

- the lid has a seal configured to seal the open end of the housing when the container is closed, and

- the lid has a lid wall located next to a portion of the housing wall for determining a channel ending at the seal, characterized in that one or both adjacent sections of the housing wall and the lid wall additionally form a chamber configured to interrupt any movement of the fluid before it reaches seals.

This chamber interrupts the action of surface tension, which creates a capillary effect, effectively preventing capillary flow of paint along the channel in the direction of the composition. The camera also creates an enlarged space in which any paint that has already flowed from the container through the channel can accumulate. It is undesirable for the paint containing the solvent to contact and come into contact with the composition, since the solvent destroys the composition and makes it less effective. Any splashes of paint that enter the channel will leak through the channel and collect in the chamber, which interrupts the capillary effect. The paint does not move further along the channel in the direction of the composition.

According to one aspect of the invention, the chamber may be formed by a profile in the wall of the lid or in the wall of the housing or in both walls of the lid and the housing. This flexibility of choice gives maximum freedom to designers both in terms of the aesthetics of the container and in relation to the choice of the production process.

In a preferred embodiment of the invention, the channel further comprises a “panel seal” that describes a radial fit of the cover in the housing at a particular point. The body wall has a small vertical taper so that the body is not absolutely vertical, i.e. the diameter of the case at the closed end is less than its diameter at the open end. This taper allows you to insert empty cases one into another during storage. When the cover joins the body at its lowest vertical point, the outside diameter of the cover is larger than the inside diameter of the body, which allows an interference fit. For example, the outer diameter of the lid is 300.3 mm, then the inner diameter of the body is 300 mm, and the interference is 0.3 mm. “Panel seal” refers to only that part of the interface of the walls of the lid and the housing that has an interference fit.

The panel seal advantageously prevents the ink from easily getting into the channel.

According to a second embodiment of the invention, the container is substantially circular or oval and the chamber extends around the entire periphery of the container.

The shape of the container was found to be inconsequential, although a smooth curved profile in cross section can be obtained relatively easily. However, the width of the chamber relative to the width of the channel plays an important role. In practice, the inventors have found that the width of the cross-section of the chamber should preferably exceed the thickness of the material from which the container is made.

In addition, it is preferred that the chamber extends all around the periphery of the container so that paint sprays do not accumulate at certain points on the periphery. This allows the user to always open the container manually, regardless of its orientation around the vertical axis.

Preferably, at least a portion of the container is made of metal and the profile of the chamber is formed by rolling. Metal containers are easy to dispose of and are substantially less harmful to the environment than alternative materials such as plastic. The rolling process allows you to get the exact profile of the camera. During the rolling process, the rotating disks of the reciprocal form can be easily brought to the wall (both to the wall of the casing and to the wall of the lid), pressed into this wall and give it the shape of the desired profile.

In a further embodiment of the invention, the container further comprises a plastic ring. This ring is initially attached to the outwardly protruding ring of the lid wall to protect the user from cuts against sharp edges. When the cover is mounted on the body, the plastic ring protrudes above the body bend and snaps into place under that bend, thereby securing the cover to the body. If you accidentally drop the filled container, the lid will remain in place and the liquid will not spill. In addition, if ink splashes into the channel and reaches the primary seal area, despite the integrity of the panel seal and chamber, the plastic ring forms a lever that helps the user manually remove the cover. This is especially true if the channel also contains a panel seal, since it is much harder to open a container when fitting with an interference fit than a container without a panel seal.

In yet another embodiment of the invention, the plastic ring comprises circumferentially spaced holes. These holes are the points at which the tool can be inserted into the plastic ring to remove the cover. This is useful if ink splashes fall into the primary seal area, making manual opening of the container lid difficult. Some users, such as older people, will find it helpful to use a tool to help them open the cover from the case.

Options that use a plastic ring may additionally contain locking tabs. Such tongues are circumferentially spaced sections of the ring that can be disconnected from the ring itself due to the plurality of plastic bridges. A part of each or any tongue is adapted to be gripped, indicating which end of the tongue the user should break.

Such tabs are intended to give some flexibility to the plastic ring when the tabs are removed from the ring. For example, the user, when the tabs are disconnected, can give the round ring an oval shape, creating a small gap in diameter, which will help the user remove the lid from the container.

The present invention is particularly applicable to liquids, such as paints, that adhere the chamber to a container, more specifically to metal containers, and therefore to containers in which most opening problems occur.

Brief Description of the Drawings

The following is a description of a preferred embodiment of the invention, by way of example only, with reference to the attached drawings, wherein:

figure 1 - diagram of a capillary tube, which is a widely used laboratory device used to demonstrate the phenomenon of capillary effect;

figure 2 is a schematic section illustrating a well-known on the market container 1; channel 6 is clearly shown, which can be seen in the prior art;

figure 3 is a cross section of one embodiment of the invention, illustrating the chamber 3, located so as to interrupt the leakage of any product (not shown) through the channel between adjacent surfaces of the housing 5 and the wall 2 of the lid under the action of a capillary effect; the position of the panel seal 17 is also shown (this element locking the cover on the housing is omitted for simplicity);

FIG. 4 is a schematic sectional view of an embodiment of the present invention of FIG. 3, in which there is a plastic ring 16;

5 is a perspective view in cross section of a container containing a plastic ring 16 with a hole 18.

Figure 1 is used to illustrate the phenomenon of capillary effect. When the lower end of the capillary tube 13 is placed in the liquid 11, the liquid 11 moves in the capillary tube 16 and reaches a level that is higher than the level 10 of the bulk of the liquid 11 in the container. This equilibrium position is determined by the balance of surface tension and gravity acting on a column of raised fluid. The rise height 12 increases with decreasing radius of the tube 13 (it should be noted that the diameter is equal to two radii), as follows from the following equation given in the classic textbook of Professor Batchelor (George Keith, An Introduction To Fluid Dynamics. Cambridge University Press, 1967. ISBN 0521663962) in hydrodynamics: h = (2 Tcosθ) / pgr, where

h - lifting height (12) (m);

T - surface tension (Nm ^-1 );

θ is the angle (15) of the contact of the liquid 11 with the capillary tube (13) (radian);

p is the density of the liquid (kgm ^-3 );

g - acceleration of gravity (ms ^-2 );

r is the radius of the capillary tube 13 (m).

The implementation of the invention

As shown in FIG. 2, the lid for the container 1 has a radially horizontal central panel 4 and a substantially axial vertical wall 2 ending radially outwardly with the outgoing ring 8. As a primary seal, there is a composition 9 on the inner side of the ring 8.

In use, when the lid is placed on the housing 5, the composition 9 is in contact with the curl 7 of the housing and a channel 6 is formed between two adjacent surfaces of the wall 2 of the cover and the upper edge of the housing 5. This channel 6 is a path for capillary leakage of liquid.

Figure 3 shows the chamber 3, located along the axis of the channel 6 and also formed by these adjacent surfaces. Also shown is a panel seal 17 located in the axial direction between the chamber 3 and the composition 9.

Figure 4 shows a plastic ring 16 of one of the preferred options. This plastic ring 16 is located radially outside of the wall 2 of the cover and the upper edge of the housing 5 and protects the user from cuts by the sharp edge of the ring extending radially outward 8. Its main purpose is to facilitate the opening of the cover if paint splashes nevertheless get into channel 6 and onto the composition 9 and into the zone between them.

As shown in FIG. 5, the plastic ring 16 according to a preferred embodiment of the invention may additionally have one or more holes 18. These holes 18 allow the user to use a lever to open the lid if necessary.

Claims (7)

1. A container (1) for storing liquid, comprising a cover (2, 4) and a housing (5), wherein
- the housing (5) has a wall of the housing, which defines the open end, and
- the cover (2, 4) has a seal (9) configured to seal the open end of the housing (5) when the container is closed, and
the lid has a lid wall (2) located adjacent to the wall portion of the casing (5) to define a channel (6) ending at the seal (9);
characterized in that one or both of the adjacent sections of the wall of the housing and the wall (2) of the lid additionally form a chamber (3), configured to interrupt any movement of the liquid before it reaches the seal (9),
at least part of the body (5) and / or the lid (2) of the container is made of metal, and the profile of the chamber (3) is obtained by the rolling process. 2. The container according to claim 1, in which
- the open end of the housing (5) has a curl (7), and
- the cover has a wall (2) essentially vertical in the axial direction, ending with a ring extending radially outward (8), while the primary seal (9) in the axial direction is located under the ring (8),
as a result, when used, when the primary seal (9) is placed on the curl (7) of the housing, two adjacent surfaces of the wall (2) of the cover and the housing (5) define a channel (6), coaxial with the primary seal (9), and a channel ( 6) additionally forms a chamber (3). 3. The container according to claim 1 or 2, in which the channel (6) further comprises a panel seal (17). 4. The container according to claim 1 or 2, in which the container is essentially round or oval, and the chamber (3) extends around the entire periphery of the container. 5. The container according to claim 1, in which the cover (2, 4) further comprises a plastic ring (16). 6. The container according to claim 5, in which the plastic ring (16) further comprises circumferentially spaced holes (18). 7. The container according to claim 5 or 6, in which the plastic ring (16) further comprises locking tabs.

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