Cap made of synthetic material

Abstract

The invention relates to a cap having a base portion (2A) that has been raised in order to match a circular internal capping wall (6) in order to provide a better grip when removing the cap.

Claims

1. A synthetic material stopper, which is configured for mounting on a neck of a receptacle, the stopper comprising: a base having an internal circular stopping wall extending toward a lower portion of the stopper, the internal stopping wall configured to enter said neck; and a safety collar connected to the lower portion of the stopper by a pre-cut line and removably couplable to said neck by retaining means, wherein a portion of said base extends upward from said internal circular stopping wall to form a raised portion to enlarge an outside surface for gripping said cap, wherein a circular indentation is formed between the raised portion and a non-raised portion of the base, the circular indentation comprising gripping protrusions having a plurality of first diametric fins extending radially outwardly from the wall of the raised portion, and wherein the stopper further comprises an external surface between the lower portion of the stopper and the raised portion of the base, said external surface positioned radially outwardly from the plurality of first diametric fins, the external surface having a plurality of second diametric fins extending radially outwardly therefrom, each of the second diametric fins being longitudinally extended by a respective first diametric fin.

2. The stopper according to claim 1, wherein a first cavity defined by the internal circular stopping wall and a second cavity created by the raised portion of the base together form a single large cavity having a smooth wall.

3. The stopper according to claim 1, wherein the second diametric fins are fewer in number than the first diametric fins.

4. A synthetic material stopper, which is configured for mounting on a neck of a receptacle, the stopper comprising: a base having an internal circular stopping wall extending toward a lower portion of the stopper, the internal stopping wall configured to enter said neck, the stopping wall defining a first cavity positioned radially inwardly from a threaded surface of the base; a safety collar connected to the lower portion of said stopper by a pre-cut line and removably couplable to said neck by retaining means; and a raised wall extending upward from the stopping wall in a direction away from the safety collar, the raised wall defining a second cavity and forming a portion of the stopper absent threads; wherein the stopping wall and the raised wall are of substantially similar heights such that the first cavity and the second cavity form substantially similar volumes, and wherein the second cavity is configured to enlarge the outside surface for gripping said cap, and wherein a circular indentation is formed between the portion radially outwardly from the raised wall and the base, the circular indentation and the raised wall together comprising gripping protrusions.

5. The stopper according to claim 4, wherein the first cavity and the second cavity together form a single large cavity having a smooth inner wall.

6. The stopper according to claim 4, wherein said gripping protrusions include diametric fins which are rigidly connected to both the circular indentation and the raised wall.

7. A synthetic material stopper, which is configured for mounting on a neck of a receptacle, the stopper comprising: a base having an internal circular stopping wall extending toward a lower portion of the stopper, the internal stopping wall configured to enter said neck, the stopping wall defining a first internal cavity positioned radially inwardly from a threaded surface of the base; a safety collar connected to the lower portion of the stopper by a pre-cut line and removably couplable to said neck by retaining means; a raised wall extending upward from the stopping wall in a direction away from the safety collar, the raised wall defining a second internal cavity; a plurality of gripping protrusions forming first diametric fins extending radially outwardly from an outer surface of the second cavity, each gripping protrusion having a height equal to the height of the other of the plurality of gripping protrusions, wherein the gripping protrusions extend along the height of the second internal chamber, and wherein the plurality of gripping protrusions enlarge the outside surface for gripping said cap; and an external surface between the lower portion of the stopper and the non-raised portion of the base, said external surface positioned radially outwardly from the plurality of first diametric fins, the external surface having a plurality of second diametric fins extending radially outwardly therefrom, each of the second diametric fins being longitudinally extended by a respective first diametric fin.

8. The stopper according to claim 7, wherein the first cavity and the second cavity together form a single large cavity having a smooth inner wall.

9. The stopper according to claim 7, wherein a circular indentation is formed between the portion radially outwardly from the raised wall and the base, the circular indentation comprising the plurality of gripping protrusions.

10. The stopper according to claim 7, wherein the second diametric fins are fewer in number than the first diametric fins.

Description

(1) The figures of the accompanying drawings will explain how the invention can be implemented. In these figures, identical reference numerals denote like elements.

(2) FIG. 1 is a schematic axial section of a known stopper upon which the present invention shall improve.

(3) FIGS. 2 and 3 are a front view and a plan view, respectively, of an embodiment of the stopper according to the invention.

(4) FIGS. 4 and 5 are diametric sections of the stopper from FIGS. 2 and 3, along the lines IV-IV and V-V, respectively, from this latter figure.

(5) FIGS. 6 and 7 are perspective views from above and below, respectively, of the stopper from FIGS. 2 and 3.

(6) FIG. 1 is a schematic diametric section of a known synthetic material stopper 1, in the form of a cap, mounted on the neck 3 of a receptacle 4 in order to seal the opening thereof. The stopper 1 can be screwed onto the neck 3 as a result of threads 5, and comprises an internal circular stopping wall 6 which is carried by the base 2 and is capable of entering said neck 3.

(7) In addition, the stopper 1 comprises a safety collar 7 which is connected to the lower portion of the stopper 1 by a pre-cut line 8.

(8) In the sealing position (as shown in FIG. 1), the stopper 1 is screwed into the neck 3 to a maximum, the sealing internal circular stopping wall 6 being driven downwards therein and the safety collar 7 being held on said neck 3 by means of a known system of lugs 9 (not shown in FIG. 1 but identical to those visible in FIGS. 4 to 7), which interacts with retaining lugs (not shown) carried by said neck 3.

(9) Therefore, to open the receptacle 4, the stopper has to be unscrewed and a sufficiently high twisting moment has to be exerted thereon to break the pre-cut line 8 and overcome the friction of the internal stopping wall 6 in the neck 3 of the receptacle. It goes without saying that, in order to apply this twisting moment, it is necessary for the operator's hand to grip the stopper 1 correctly, which is not always the case. As a result, the operator trying to open the receptacle 1 has problems and he has to exert himself.

(10) To overcome these drawbacks, in the stopper 10 according to the invention, which is shown in FIGS. 2 to 7 and comprises the elements 5 to 8 described with regard to FIG. 1 (see mainly FIG. 4), the portion of the base 2 that matches the internal circular stopping wall 6 is raised (2A) on the outside. The base of the stopper 10 thus now comprises said raised portion 2A and a peripheral portion 2B.

(11) The outer surface of the stopper 10 is thus larger than that of the stopper 1, such that the manual grip on the stopper 10 is increased and applying the opening twisting moment is simpler, without the amount of material used for making the stopper being significantly higher in order to do so.

(12) Inside the stopper 10, a single large cavity 11 having a smooth wall is formed, which cavity is made up of the combination of the cavity 12 defined by the internal circular stopping wall 6 and the cavity 13 created by the portion 2A of the base 2 being raised.

(13) To improve the grip on the stopper 10, gripping protrusions 14 are arranged in the circular indentation 15 between the raised portion 2A and the non-raised portion 2B of the base 2. Gripping protrusions of this type can be diametric fins that are rigidly connected to the walls of the indentation 15.