The technical problem successfully solved by the invention in question refers to the design and construction of such attachment that will allow for extraction a cork or similar bottle stopper without any additional bottle opener.

The problem of opening the bottles closed with corks can only be solved with the application of a special bottle opener. Several versions of openers have been known where the main part is constituted of a bar twisted into a spiral body that is to be introduced into the cork. The simples version of such attachment is fitted with a transversal handle on the top that allows for extraction of the cork with a simple pull. Besides, there are various other versions that allow for easier extraction. Such

versions are, for instance, described in WO 97/01504, WO 96/15062, EP 620 154 patent documents.

All the above described versions of bottle openers do not solve the technical problem of opening bottes, closed with a cork or similar stopper, without application of an additional bottle opener. But the invention in question, however, aims at construction of such attachment for extraction corks or similar bottle stoppers that allows for extraction without application of an additional tool and/or bottle opener. For this purpose the attachment is designed as a twisted body to be introduced into the stopper, provided with a pull type string on the top. There may also be a screw introduced into the body of the bottle stopper; it is connected with the opening string via a special washer or with a bayonet pin.

The invention will be explained in detail on the basis of concrete examples and the corresponding figures whereof Figure 1 shows the extraction attachment referred to in this invention, as a side view and top view ; Figure 2 shows a cork containing the bottle opener referred to in this invention and in the second example the cross- section thereof;

Figure 3 shows a cork with a built-in bottle opener, such as referred to in this invention, presented as a cross- section of the third example.

The attachment for extraction corks and similar stoppers, such as shown in Figure 1, consists of the basic body 2 that is designed as a twisted attachment with a pull type string 5 in the form of a flat narrow tape arising out of the upper part 10. In the center of the pull type string 5 there is a part 5a of double width of the pull type string. At the end the pull type string is fitted with a pointed termination 5b in the form of a small arrow.

The basic body 2 in the form of a twisted attachment consists of a conical body, threaded on the outer circumference. In the upper third of the height of the basic body there is a hole 11, transversal to the main axle of the body; it is more or less square, conically narrowing towards its lower part and right at the end becoming a narrow slot. In the upper part of this transversal hole there is on each side a symmetrical short flat rectangular attachment 12.

On the top, the basic body 2 is terminated by the part 10 in the form of a low truncated cone turned upside down, provided with a centric rectangular hole 13 in the base plate.

The attachment referred to in this invention is mechanically or manually twisted into the stopper at the filling and closing of the bottle. The pull

type string 5 runs along the bottleneck and is covered, e. g. with paper that covers the stopper in the way that the end of the pull type string 5 stretches beyond the paper. At opening the bottle we grasp this end of the string and use it to tear off the paper, whereafter we insert the end 5b into the opening 13 of the upper part 10. As the end 5b is shaped like a small arrow, it gets stuck with its flat attachments 12 inside the body 2, whereby the pull type string forms a firm loop whereby it is possible to draw the stopper from the bottle.

Another version of the solution of the technical problem in question, such as presented in Figures 2 and 3, shows a bottle cork with a screw 2' inserted into the body 1, provided with a preliminarily inserted washer 3 with a grove 4 for the pull type string 5'. As the corks are generally covered with a paper or plastic cap 6, the pull type string 5 runs along the outer part of the bottle neck in the way that it lies outside the above cap 6.

When opening the bottle we pull the free end of the pull type string 5, whereby we first tear the cap 6 and thereafter draw also the body 1 of the cork.

The bottle cork with a built-in bottle opener, such as referred to in this invention and shown as the cross-section of the second example in Figure 2, contains in the body 1'the screw 2"with a recess 7, with the edge 8 along the bottom, while the pull type string 5'is fixed to the bayonet pin 9.

The screw 2"is introduced into the cork body 1', whereafter follows the insertion of the bayonet pin 9 with the pull type string 5'. The screw 2"is

inserted into the body 1'in the way that it is level with the upper edge of the cork body 1'. In case of this version, too, the pull type string 5'runs along the outer part of the bottle neck in the way that it lies outside the cap 6; thus at opening the bottle we pull the free end of the pull type string 5', whereby we first tear the cap 6 and thereafter draw the cork body 1' from the bottle.