CN1086188A - Container lid capable of exhausting and distributing liquid - Google Patents

Abstract

The invention relates to a cap mounted on a liquid reservoir, the cap according to the invention facilitating the venting and dispensing of liquid.

Description

The invention relates to a cover mounted on a liquid storage container. The cap according to the invention facilitates venting and dispensing of liquids.

Liquid reservoirs and their many applications have been extensively described in the art. In particular, many of the inventions relate to containers for liquids which can generate pressure, such as components containing bleach. Of course, the particular problem associated with that liquid is also the pressure, which builds up in a closed container in which it is stored, which can lead to safety problems and can also lead to deformation of the container.

In the prior art, solutions to such problems have been proposed, for example, by designing the container in a specific shape, so that the container has an optimal resistance to the resulting pressure, thereby limiting the degree of deformation. However, this solution has the disadvantage of limiting the flexibility of shape, the choice of materials and the thickness of materials when designing such containers.

Other solutions involve various venting caps for such containers, which allow the escape of the gases generated in the container. Such caps are described, for example, in GB-2032892 which discloses caps comprising spacers juxtaposed at the top of the cap which allow pressure relief through threads in the side walls of the cap. Improvements to such lids are known, the top of the lid further comprising grooves into which the gasket bends when pressure is built up inside the container. The curved gasket is an improvement over the lid of GB-2032892 which releases pressure through grooves and threads in the side wall of the lid.

However, a disadvantage of such ventable lids is that the lid must be removed from the container when the liquid in the container is dispensed. It is therefore an object of the present invention to provide a cap which is secured to the container so that it does not leak liquid when venting and dispenses the liquid without removing the cap from the container.

Furthermore, prior art caps do not dispense liquid through a small opening such as a spout, so another object of the present invention is to provide a device for venting and dispensing liquid that ensures proper venting while Liquid is dispensed from a small opening.

Referring to Fig. 1 and Fig. 2 below, the present invention is the container lid that is made up of inner and outer two parts, promptly is made up of housing (1) and cover (2). The housing is composed of a side wall (3) and a top cover (4) connected to the side wall (3). There is a device (5) on the side wall to allow the gas to pass through to reach the surrounding space, there is at least one groove (6) inside the top cover, and the shell is also equipped with a gasket (7) placed on the top cover, which is characterized by The spacer and top cover are penetrated by a hole (8), and the housing also includes a tubular portion (9) extending through the hole in the top cover and spacer, the outer diameter of which corresponds to the diameter of the hole , where there is also a seal that presses the gasket hermetically against the inside of the top cover.

The cover of the present invention is composed of inner and outer parts. Unless otherwise stated, the term "inner" refers to the part of the container towards which the lid is to be fitted, and the term "outer" refers to the surrounding space. While not limiting in this respect, the lids of the present invention are preferably made of plastic materials familiar to those of ordinary skill in the art. The cover of the present invention consists of a shell (1) and a cover (2). The casing is composed of a side wall (3) and a top cover (4) connected thereto.

The side wall (3) of the housing is in contact with the outside of the neck of the container on which the above-mentioned lid is installed. An important object of the invention is that the means (5) on the side walls allow the passage of gas to the surrounding space, ensuring pressure relief. The lid of the present invention can be permanently or removably attached to the container in a variety of ways. Although it is an object of the invention to dispense liquid without removing the lid from the container, it is still desirable, for example, to It is possible to remove the lid from the container when there is a large amount of liquid or when the container is to be refilled. Thus, such a cap can be screwed or snapped on to the container. In a preferred embodiment of the invention, the cap is screwed onto the container, whereby the means (5) is a thread formed inside the side wall. In other possible embodiments, the device (5) may also consist of one or several passages passing through the side wall (3) or along the inner side of the side wall.

An important part of the cover according to the invention is that there is at least one recess (6) inside the housing top. This groove must be shaped, sized and located on said surface so that the gasket (7) described hereinafter bends into it to ensure pressure relief. In a preferred embodiment of the invention, the grooves are provided on the inner periphery of the top cover. In a preferred embodiment of the invention a plurality of grooves are provided on the periphery of the interior of the top cover.

In a preferred embodiment of the invention, the inside of the top cover also includes a locking key or a protruding snap ring or any continuous projection (11) at one of said gaskets adjacent to the hole (8). The area is in contact with the gasket to increase the mechanism pressure applied to the gasket, thereby improving the seal between the gasket and the interior of the top cover.

Another important part of the roof according to the invention is the gasket (7) juxtaposed inside the roof. The gasket must be liquid-tight to the liquid contained in the container to which the lid is fitted and must have some flexibility. This allows the gasket to bend into the aforementioned groove inside the top cover when pressure builds up in the container. However, the gasket must be rigid enough to keep it liquid-tight even when the container is turned upside down. In the cap according to the invention, the gasket is juxtaposed inside the top cap. The choice of gasket material depends on the liquid in the container and, therefore, will be different in different cases. Critical factors in material selection are the impermeability and bendability of the material. Suitable gasket materials for use here may be polyethylene foam or plastic compound containing ethylene vinyl acetate (EVA) or rubber including silicone.

Another important part of the cap of the present invention is the hole (8) through the top cap and gasket, which is used to distribute the liquid in said container. An advantage of the invention is that the size of the holes is not critical for venting. Accordingly, an appropriate aperture size can be selected as a sole function of the container's intended end use, ie, the desired properties of the liquid to be dispensed. For example, a small opening similar to a nozzle mounted on a compressible container may be chosen to dispense the liquid like a jet.

According to the invention, said casing also has a tubular portion (9) passing through a hole (8) in the top cover and gasket. The cross-section of the tubular portion may be circular or oval. The liquid in the container can be dispensed through this tube forming part, and in a preferred embodiment the tube part is designed with an integral seal to ensure that the gasket is pressed against the inside of the cap in a sealed manner. The tubular section can constitute a distribution system by itself or become a component of a more complex distribution system. The outer diameter of the tubular portion is smaller than the diameter of the hole.

According to the invention, it is important that the tubular portion is provided with a sealing device which ensures that the gasket is pressed against the top cover in a sealed manner. The degree to which the gasket needs to be pressed against the inside of the cap depends primarily on the physico-chemical properties of the liquid in the container and the compressibility of the gasket. Without a seal, the liquid in the container would leak out of the lid along the hole between the gasket and the inside of the top lid.

There are many ways to provide the seal. The sealing means can be obtained by a suitable shape of the tubular part and designing the tubular part such that when in position the tubular part integrally constitutes the sealing means. For example, locking keys or snap rings are installed under the gasket on the outside of the card-adjacent tubular part (hereinafter "lower" device) and above the outside of the top cover (hereinafter "upper" device), which can seal the The gasket presses against the inside of the top cover.

Alternatively, the sealing means may be obtained by the physical process of inserting the tubular portion into the hole and securing it in place. For example, the tubular portion is inserted during heat pressing or heat sealing so that the gasket is also held in place. Sealing means may also be provided by non-integral mechanical fastening means with the tubular portion, for example by a non-integral clip.

In a preferred embodiment, said tubular portion is provided with two rings (10), one below the gasket and one above the top cover exterior. This ring has the advantage over a detent in that it maintains an equal mechanical pressure on the gasket along the circumference of the tubular portion. Another advantage of using a ring instead of a detent is that, inside the above-mentioned top cover and adjacent to the hole, the ring can be provided with a detent or a protruding ring or any continuous ring that contacts the washer. projections (12) that increase the mechanical pressure on the gasket. The lower and upper means may be similar or different in size and shape, for example, in one embodiment they may combine a ring and detent, or two rings of different sizes. Such means may be permanently or removably mounted on the tubular portion, or both. For example, the molded tubular portion may comprise a lower fitting and the upper portion of the tubular portion may comprise a thread at which the , the upper means, for example a threaded ring, can be screwed on top of said tubular portion.

In a preferred embodiment of the invention, the tubular portion and the sealing means are integral, i.e. the tubular portion and the sealing means are a single component, and this component is sized so that it can be snapped onto the pre-assembled gasket and housing. In this preferred embodiment, the advantage of using different sizes for the lower and upper means is that they can be easily snapped together. In a preferred embodiment, the lower means is a large ring, the upper means is a smaller bevelled ring, and the tubular portion snaps onto the preassembled spacer and housing from below. This embodiment provides a relatively simple assembly of the cover while providing a tight seal between the gasket and the housing.

Referring to Figure 2, which is a better embodiment of the invention, the lower means consists of a ring (13) extending over the entire diameter of the neck of the container on which said lid is fitted. This ring also has a through hole (14) through which the pressure can pass. The advantage of this construction is that the ring, instead of the gasket, forms a seal with the neck of the container when the cap is screwed onto the container. Thus, the same mechanical pressure acts on the entire surface of the gasket, and more importantly, a reproducible mechanical pressure acts on the gasket almost independent of the torque generated when the cap is screwed onto the container. Therefore, when the cap is over-tightened, the gasket cannot be accidentally pressed into the groove inside the top cap, and the venting characteristics of the cap are therefore independent of this torque. To further improve the seal between the lid and the container, and to further improve this embodiment, the ring includes a connecting side wall (15) extending along the inner surface of the container neck.

The lid according to the invention also has a cover (2). Here, those skilled in the art can use various suitable covers, as long as the cover can ensure the sealing of the external opening of the tubular part (9). For example, the cover can be screwed or snapped onto the housing (1). As an alternative, the cap can be configured as a nozzle for dispensing the liquid in the container. Another alternative is that the cover can be made as a push-on, turret or push-pull type.

Claims (8)

1, a kind of lid of liquid-accumulating container is by interior, outer two parts are formed, this lid is made up of a housing (1) and a cover (2), housing is made up of a sidewall (3) and a top cover that is attached thereto (4), this sidewall has the device (5) that gas is passed and reach ambient, wherein this top cover has a groove (6) at least in inside within it, this housing also has one and be against the non-leakage pad of top cover in-to-in (7), it is characterized in that: this top cover and this pad are run through by hole (8), this housing also has a barrel portion (9) that extends through the hole in this top cover and this pad, the external diameter of barrel portion also has one and guarantees to make pad to be pressed against top cover in-to-in sealing arrangement with sealing means corresponding to the diameter of this hole.

2, lid as claimed in claim 1 is characterized in that: device (5) is exactly sidewall (a 3) in-to-in helicitic texture.

3, lid as claimed in claim 1 or 2 is characterized in that: the barrel portion that top loop bottom ring has been installed has constituted a kind of sealing arrangement.

4, lid as claimed in claim 3 is characterized in that: this lower part ring comprises a continuous ridge (12) in the adjoining zone of this hole.

5, as claim 3 or 4 described lids, it is characterized in that: this bottom ring extends on the whole diameter of container neck, and this endless belt has through hole (14).

6, as each described lid in the claim 3 to 5, it is characterized in that: this bottom ring has a connection sidewall (15) that extends along the container neck inside face.

7, as each described lid in the claim 1 to 6, it is characterized in that: the inner continuous ridge (11) in addition of top cover in the hole adjacent areas.

8, as each described lid in claims 1 to 7, it is characterized in that: cover (2) is a depressible cover.

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