PERFORABLE CLOSURE FOR A CONTAINER.

TECHNICAL FIELD

The present invention refers to containers and to a perforable closure for a container, in particular for a drug or fluid container to be infused into a human or animal body.

BACKGROUND ART

There are known liquid-tight closure including a perforable membrane, generally made of synthetic elastic material, such membrane being fixed to the bottle opening through a capsule, whose middle portion is perforated or removable for allowing an operator to connect a transfusion set for phleboclysis or hypodermoclysis to the bottle so perforating its membrane through a perforator of said transfusion set.

A disadvantage of said known devices is that the membrane is entirely made with elastic material which has not only a high production cost, but also it is not completely recyclable because of the membrane is mainly made with thermosetting elastic material which is not compatible with the thermoplastic material used for the container or for the cap.

Further disadvantage of the known closure consists in that in order to obtain a high sealing of the membrane with respect to the container neck, it is necessary to use much more material.

DISCLOSURE OF THE INVENTION

An object of the present invention is to propose a perforable closure requiring less material.

Another object is to propose a closure which can be carried out with low costs.

Further object is to propose a closure which can be more easily recyclable.

BRIEF DESCRIPTION OF THE DRAWINGS

The characteristics of the invention are evidenced in the followings with particular reference to the enclosed drawings in which:

Figure 1 shows a perspective view of the closure object of the present invention; Figure 2 shows a side and partially sectioned view of the closure of figure 1 assembled into the related cap. - Figure 3 shows a perspective view of closure and cap of figure 2.

BEST MODE OF CARRYING OUT THE INVENTION

With reference to figures 1-3, number 1 indicates the perforable closure for a container object of the present invention.

Said closure 1 is fit to be inserted into a container cap 10 which is perforable by at least one perforator of a transfusion set or similar.

The closure 1 comprises a middle portion 2 carried out with perforable elastic material and an external portion 3 carried out with rigid material. Said portions, middle 2 and external 3, are carried out in a single mould by double injection of the relative thermoplastic materials that merge, thus forming a single body in correspondence of a common zone (9).

The middle portion 2 has a disc shape and the external portion 3 has circular ring shape, the first one being made of thermoplastic elastomer material and the second one being made of polypropylene or similar.

The external portion 3 of the closure 1 has a sealing means 4, of protrusion lip type having a circular ring shape positioned around the external edge of said external portion 3 and fit to match by sealing the cap 10.

The central portion 2 of the closure has two hollows 5, 6 of circular shape to indicate the perforation position.

The central portion 2 and the external portion 3 are reciprocally fixed as single body. The upper portion 7 of the closure 1 which is not in contact with fluid, liquid, dust or other content, inside the container, is protected by a removable closure 8 sealed and fixed on the cap 10.

The operation of the device provides, once the closure 1 is inserted inside the cap 10 while making and filling the container, that the user, in order to use the container, takes away the removable part 8 sealed and fixed to the cap 10 and perforates the membrane with a perforator of a transfusion set or similar in correspondence of a hollows 5, 6.

In a not shown variant, the central portion 2 has only one hollow 5, 6 also of non circular shape, or has protrusions, useful to indicate the perforation position to the user.

Further not shown variants provide that the sealing lip means 4 is made of thermoplastic or thermoplastic elastomer material or that there are more than one sealing means 4, preferably in number of two.

Other variant provides that the common zone 9 between the central portion 2 and the external portion 3 is not only of circular shape but also of other various shapes, for example oval or polygonal.

An advantage of the present invention is to provide a perforable closure using less material.

Other advantage is to provide a closure carried out with low realization costs.

Further advantage is to provide a closure which is more easily recyclable since it uses thermoplastic material not only for the membrane, but also for the container and for the cap.