Cap for a container
View Patent ↗What is described here is a closing cap ( 1 ) for a container ( 2 ), in particular for a container ( 2 ) intended to contain pressurised beverages. The cap comprising a lateral wall ( 3 ) extending around an axis (Z) and a transversal wall ( 4 ) positioned at one end of the lateral wall ( 3 ), a separating line ( 5 ) being provided on the lateral wall ( 3 ) to define a retaining ring ( 301 ), which extends as far as a free edge ( 304 ) and is configured to internally engage with a locking ring ( 206 ) of a neck ( 201 ) of the container ( 2 ), and a closing element ( 302 ) removably engageable with the neck, so as to open or close the container. The cap comprises an inner thread structure, positioned on the inside of the lateral wall ( 3 ) of the closing element ( 302 ) to engage with an outer thread structure of the neck ( 201 ) and to removably couple the closing element ( 302 ) to the neck ( 201 ) of the container ( 2 ). The inner thread structure ( 305 ) extends in a spiral around the axis (Z) and comprises at least two vent grooves ( 306 ) which extend axially and interrupt the inner thread structure ( 305 ) thereby defining first segments ( 307 ), near the transversal wall ( 4 ) and second segments ( 308 ), over which the first segments ( 307 ) are axially superposed; wherein each of the first segments ( 307 ) extends angularly in a continuous way and at least one segment of the second segments ( 308 ) is interrupted by a vent passage ( 309 ), to facilitate the discharge of the pressure.
1. A closing cap ( 1 ) for a container ( 2 ) intended to contain pressurised beverages, comprising a lateral wall ( 3 ) extending around an axis (Z) and a transversal wall ( 4 ) positioned at one end of the lateral wall ( 3 ), a separating line ( 5 ) being provided on the lateral wall ( 3 ) to define a retaining ring ( 301 ), which extends as far as a free edge ( 304 ) and is configured to engage with a locking ring ( 206 ) of a neck ( 201 ) of the container ( 2 ), and a closing element ( 302 ) removably engageable with the neck, so as to open or close the container; the cap comprising an inner thread structure, positioned on the inside of the lateral wall ( 3 ) of the closing element ( 302 ) to engage with an outer thread structure of the neck ( 201 ) and to removably couple the closing element ( 302 ) to the neck ( 201 ) of the container ( 2 ), the inner thread structure ( 305 ) extending in a spiral around the axis (Z) and comprising at least two vent grooves ( 306 ) which extend axially and interrupt the inner thread structure ( 305 ) thereby defining first segments ( 307 ), near the transversal wall ( 4 ) and second segments ( 308 ), over which the first segments ( 307 ) are axially superposed; wherein each of the first segments ( 307 ) extends angularly in a continuous way but for the vent grooves ( 306 ), and wherein at least one segment of the second segments ( 308 ) is interrupted by a vent passage ( 309 ), to facilitate the discharge of the pressure.
2. The cap according to claim 1 , wherein at least two of the second segments ( 308 ) are interrupted by respective vent passages ( 309 ).
3. The cap according to claim 1 , wherein all of the second segments ( 308 ) are interrupted by respective vent passages ( 309 ).
4. The cap according to claim 1 , wherein the inner thread structure ( 305 ) comprises third segments, over which the second segments ( 308 ) are axially superposed;
wherein at least one segment of the third segments is interrupted by a respective vent opening which is axially aligned with the vent passage ( 309 ) of the second segment ( 308 ).
5. The cap according to claim 1 , wherein the angular dimension of each of the vent grooves ( 306 ) is greater than the angular dimension of the vent passage ( 309 ).
6. The cap according to claim 1 , wherein the inner thread structure ( 305 ) comprises a single thread which extends in a spiral angularly for an angle greater than or equal to 650° and less than or equal to 900° and extends from a start placed near the transversal wall ( 4 ), to an end placed near the separating line ( 5 ).
7. The cap according to claim 6 , wherein the thread extends for an angle greater than or equal to 650° and less than or equal to 720° and extends through the first segments ( 307 ) and the second segments ( 308 ).
8. The cap according to claim 4 , wherein the inner thread structure ( 305 ) comprises a single thread which extends in a spiral angularly for an angle greater than or equal to 650° and less than or equal to 900° and extends from a start placed near the transversal wall ( 4 ), to an end placed near the separating line ( 5 ), wherein the thread extends for an angle greater than 720° and less than or equal to 900°, and extends through the first segments ( 307 ), the second segments ( 308 ) and the third segments.
9. The cap according to claim 1 , wherein each vent groove ( 306 ) is recessed relative to an inner surface ( 310 ) of the closing element ( 302 ) from which the inner thread structure ( 305 ) protrudes.
10. The cap according to claim 1 , wherein each vent passage ( 309 ) is placed on an inner surface ( 310 ) of the closing element ( 302 ) from which the inner thread structure ( 305 ) protrudes.
11. The cap according to claim 1 , wherein there are six vent grooves ( 306 ) and they define six first segments ( 307 ) and six second segments ( 308 ).
12. The cap according to claim 4 , wherein the angular dimension of each of the vent grooves ( 306 ) is greater than the angular dimension of the vent opening.