JP3403731B2 - Ventilation and discharge cap of container - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cap for a container for containing a liquid. The cap according to the invention is able to ventilate the container as well as expel the fluid.

BACKGROUND OF THE INVENTION Containers for containing liquids are widely known in the art and have numerous potential applications. In particular, numerous inventions have been made relating to vessels containing pressure-producing liquids, such as mixtures containing bleach. There are special problems with such liquids. That is, there is a problem that the pressure generated in the closed container containing such a liquid causes a safety problem or causes the container to be deformed.

In this technical field, for example, the container is designed in a specific shape, and the container has appropriate resistance to the generation of pressure
It has been proposed to solve this problem by limiting the degree of deformation. This type of solution has the drawback that it limits the flexibility of shape, material choice and material thickness when designing such containers.

Other solutions relate to various ventilation caps for such containers that allow the gas generated inside the container to escape. Such a cap is shown, for example, in GB2032892, which discloses a cap with a liner juxtaposed to the head of the cap to allow pressure to escape via internal threads. . It is known to make improvements to this type of cap, that is to say that the head of the cap has a further groove so that the liner flexes as the pressure inside the container increases. This deflectable liner is described in British Patent No. 2032892 via a groove and screw on the side of the cap.
Further pressure relief improvements can be made to the issue.

However, the ventilation cap has the disadvantage that the cap must be removed from the container in order to expel the contained liquid. An object of the present invention is to provide a cap capable of ventilating a container having a fixed cap without leaking the liquid contained in the container and discharging the liquid from the container without removing the cap. Is.

Moreover, prior art caps cannot be used with containers that discharge contained liquid through a small opening such as a nozzle. Accordingly, it is an object of the present invention to provide a ventilating and expelling device which is capable of expelling a contained liquid through a small opening while providing adequate ventilation.

SUMMARY OF THE INVENTION Referring to FIGS. 1 and 2, the present invention provides an inner portion,
A cap of a container having an outer part, a body part (1) and a closure body (2), said body having a side wall (3) and a connecting head (4), said side wall allowing gas to pass to the atmosphere. Equipment (5)
The head has at least one groove (6) on the inside
Wherein the body comprises a cap of a container having an impermeable liner (7) juxtaposed inside the head,
A hole (8) is passed through the head and the liner, and the body has a tubular portion (9) extending through the hole in the head and the liner, the tubular portion having a diameter of the hole. A container cap having a corresponding outer diameter, wherein the closure maintains the liner pressed against the inner side of the head in a leaktight manner.

DETAILED DESCRIPTION OF THE INVENTION The cap according to the present invention has an inner side and an outer side. Unless otherwise stated, the term "inner" hereinafter refers to the side facing the container into which the cap is secured. The term "outside" refers to the side facing the atmosphere. Without limitation, the cap according to the present invention is preferably made of a plastic material available to those skilled in the art. The cap according to the invention has a body (1) and a closure (2). The body of the cap has a side wall (3) and a joint head (4).

The side wall (3) of the body contacts the outside of the neck of the container to which the cap is fixed. The object of the invention is to have a device (5) which ensures that said side wall releases gas to the atmosphere and thereby relieves pressure. The cap according to the invention can be permanently or removably fixed to the container by various devices. It is an object of the invention to provide a cap which allows the product to be released without removing it from the container and nevertheless, for example when it is necessary to release a large amount of liquid or when it is necessary to fill the container. In addition, there is a possibility to remove the cap from the container. Therefore, the cap is screwed or snapped onto the container. In a preferred embodiment of the invention the cap is screwed onto the container and the device (5) is in the form of a thread inside the side wall. In another possible embodiment said device (5) consists of one or more passages through said wall (3) or along the inside of said side wall.

The basic structure of the cap according to the invention is that the head of the body has at least one groove (6) inside. The groove must be formed in the surface and sized and arranged to allow the liner (7) described above to flex in the groove to ensure pressure relief. In a preferred embodiment of the invention, the groove is arranged around the inside of the head. In a preferred embodiment of the invention, a plurality of grooves are arranged around the inside of the head.

According to a preferred embodiment of the invention, the inside of the head increases the mechanical pressure exerted on the liner, thereby improving the seal between the liner and the interior of the head, A catch or protruding ring in contact with the liner in the region of the liner adjacent the hole (8),
Or it has a continuous protrusion (11).

Another basic part of the cap according to the invention is the liner (7) juxtaposed inside the head. The liner is impermeable to the liquid contained in the container holding the cap. The liner must be flexible so that it can flex in the above-mentioned groove inside the head when pressure is built up inside the container. However, the liner must be stiff enough to seal the container and maintain liquid tightness when the closed container is inverted. According to the cap of the present invention, the liner is juxtaposed inside the head. The selection of suitable materials for such liners is
It depends on the liquid contained in the container and therefore varies in each case. Impermeability and flexibility are important factors that are compatible with the material. Suitable liners for use herein can be made from expanded polyethylene foam including ethyl vinyl acetate (EVA), plastic blends, or rubber including silicone rubber.

Another basic element of the cap of the invention is that there is a hole (8) in the head of the body and in the liner so that the liquid contained in the container can be discharged. One advantage of the present invention is that the size of the holes is not important for ventilation purposes. Therefore, appropriate dimensions can be selected depending on the intended purpose of the container, ie the desired release characteristics. For example, one may choose to use a small opening, such as a nozzle, in combination with a squeezable container so that the contained liquid can be ejected as a jet.

Furthermore, according to the invention, it has a tubular portion (9) which passes through the head and the liner. The tubular portion has a circular or elliptical cross section. The tubular portion is capable of releasing the liquid contained in the container, and in a preferred embodiment an integral sealing device is provided to push the liner against the inside of the head to prevent leakage. Designed to serve. The tubular portion itself forms the ejection device and can also form more complex ejection devices such as spray devices. The tubular portion has an outer diameter corresponding to the diameter of the hole.

According to the invention, the tubular device comprises a sealing device which ensures that the liner is pushed inside the head so as to prevent leakage. The degree required to compress the liner against the inside of the head depends primarily on the physicochemical properties of the liquid contained in the container and the compressibility of the liner material. Without the closure, the liquid contained in the container would leak between the liner and the inside of the head and out of the cap through the contour of the hole.

There are numerous variants that provide the sealing device. The sealing device is formed by the appropriate shape and design of the tubular portion, as if the tubular portion integrally provided with the sealing device in place. For example, the tubular portion comprises a catch portion or ring that connects the outside of the tubular portion below the liner (hereinafter referred to as the lower device) and above the outside of the head (hereinafter the upper device), Holds the liner against the inside of the head to prevent leakage.

Alternatively, physical treatment inserts the tubular portion into the hole and holds it in place to form the closure. For example, the tubular member may be inserted by hot stamping or heat sealing to secure the liner in place. Also, the sealing device
Provided by a mechanical clamping device, the clamping device is not integral with a tubular portion such as a non-integral ring portion.

In a preferred embodiment, the tubular portion comprises two rings (10), one below the liner and one on the outside of the head.

The ring parts have the advantage that they guarantee a mechanical pressure equal to the liner along the circumference of the tubular part compared to the catch part. Another advantage of using a ring instead of a catch is that the catch contacts the liner inside the head in a region adjacent to a hole as previously described to increase the mechanical pressure exerted on the liner. Alternatively, a protruding ring or a continuous protrusion (12) can be provided on said ring. The lower and upper devices can be of the same or different shape, for example in one embodiment the catches or rings can be combined or two rings of different sizes can be combined. The device is secured to the tubular portion or both. For example, it is possible to form a tubular part which already has a lower part, the device for the upper part of said tubular part screwing a threaded ring onto the upper part of said tubular part after combining said tubular part with said liner and said body. Have a screw in place.

In a preferred embodiment of the invention, the tubular portion and the sealing device are integral, i.e. the tubular portion and the sealing device are formed as one piece and the integral portion is preformed Dimensioned for snap engagement on the liner and body. In this preferred embodiment, it is advantageous to use differently sized lower and upper devices to facilitate the snap connection. In the preferred embodiment, the lower device is a large ring, the upper device is a small beveled edge ring, and the tubular portion secures the preformed liner and body from below. This embodiment greatly simplifies cap assembly and creates a tight seal between the liner and the body.

In a very preferred embodiment of the invention, referring to FIG. 2, said lower device is constituted by a ring (13) which extends through the diameter of the neck of the container holding the cap. It is composed of (13). The ring also has a perforated portion (14) through which pressure can pass. Such a structure is a ring that forms a seal at the neck of the container when it is screwed onto the container instead of the liner itself. Therefore, it exerts an equal mechanical pressure on the entire surface of the liner, and more importantly a reproducible mechanical pressure on the liner, which pressure is not what the torque is generated when the cap is screwed into the container. being independent. As a result, when the cap is screwed too hard, the liner does not suddenly push into the groove inside the head, and the ventilation characteristics of the cap are independent of the torque. To further improve the seal between the cap and the container, in practicing this preferred embodiment, the ring has a connecting sidewall (15) extending along the inside of the neck of the container.

Furthermore, the cap according to the invention has a closure (2). If the closure ensures a leak-tight closure for the outer opening of the tubular part (9), the person skilled in the art can use various closures suitable for this use. For example, a closure which is screwed or snap-fastened onto the body (1) can be used. As another example, a closure that can release the contained solution as a spray can be used. As another example, the closure is a Philip head, turret cap or push-pull type.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hernaelt, Jorden Brueg, Belize, Belgium, 65 (72) Inventor Birani, Nadi Strombak-Beber, Nübler, 119, Bee 6 (72) Invention Defrandel, Josef Fernando, Besperer, Erebelt Beck, Belgium, 28 (56) Reference JP-A-3-133749 (JP, A) Actually developed 63-70946 (JP, U) Actually developed 60-120931 (JP, U) ) Actually open 61-77353 (JP, U) Actually open 60-195752 (JP, U) Actually open 26-993 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B65D 35/44-35/54 B65D 39/00-55/16

Claims (6)

(57) [Claims] 1. A cap for a container having an inner part, an outer part, a body (1) and a closure (2), said body having a side wall (3) and a connecting head (4). Has a means (5) for releasing gas to the atmosphere, the head having at least one groove (6) inside, the body being juxtaposed inside the head, an impermeable liner ( In a cap of a container having 7), the head and the liner are pierced with a hole (8), the body having a tubular portion (9) extending through the hole of the head and the liner, The tubular portion has an outer diameter corresponding to the diameter of the hole, and a sealing means keeps the liner pressed against the inner side of the head so that no leakage occurs, and the tubular portion is The lower ring having an upper ring and a lower ring providing the sealing means Characterized in that it has a projection which is continuous in the area adjacent to the hole (12), the container cap. 2. A cap according to claim 1, wherein the means (5) are threads formed inside the side wall (3). 3. The lower ring extends through the neck of the container, the ring having a perforation (14).
The cap according to claim 1 or 2. 4. The cap according to claim 1, wherein the lower ring has a connecting side wall (15) extending along the inside of the neck of the container. 5. The inner portion of the head portion has a continuous protrusion (11) in an area adjacent to the hole.
The cap according to any one of 1. 6. A cap according to claim 1, wherein the closure (2) is a flip head closure.