Device for the selective and progressive locking of metal containers
A device ( 10 ) for selective and progressive locking of metal containers ( 18 ) to be submitted to mechanical deformations along an extended part of side surface and provided at the bottom by a notch ( 20 ), the device having: a circular plan support ( 12 ) with an end forming a housing mouthpiece ( 14 ) of a containing body ( 16 ); a shaped and mobile ring ( 22 ) eventually cooperating with an annular seal or membrane ( 24 ) placed at the mouthpiece wherein the containers ( 18 ) are inserted starting from their respective bottom. A centering collar ( 26 ) defines the mouthpiece wherein the containers ( 18 ) are inserted and which surrounds the seal ( 24 ); a centering ring ( 30 ) whose anterior front is directed towards the containers ( 18 ) presents a complementary arrangement to the containers themselves bottom periphery and provided with a plurality of through holes; a pusher ( 32 ) tensioned by an helical spring ( 34 ), placed along the device longitudinal axis ( 10 ); means apt to realize a perfect adherence with the container ( 18 ) bottom provided with a notch ( 20 ).
1. A selective and progressive locking device ( 10 ) for metal containers ( 18 ) to undergo deformation mechanical operations along a side surface extended part and provided on the bottom with a notch ( 20 ), said device comprising:
a circular plan support ( 12 ) with an end forming a mouthpiece ( 14 ) to seat a containment body ( 16 );
a shaped and mobile ring ( 22 ) eventually cooperating with a seal or annular membrane ( 24 ) placed at the mouthpiece in which containers ( 18 ) are inserted starting from respective bottom;
a centering collar ( 26 ) that defines the mouthpiece in which containers ( 18 ) are inserted and that circumscribes seal ( 24 );
a centering ring ( 30 ) whose anterior front towards containers ( 18 ) shows complimentary conformation to the bottom periphery of containers themselves;
a pusher tensioned by a helical spring ( 34 ), disposed along a longitudinal axis of said device ( 10 );
means adapted to realize perfect adherence with the container ( 18 ) bottom provided with a notch ( 20 );
wherein elastic means ( 42 ) are disposed between said containment body ( 16 ) and support ( 12 ), and said centering ring ( 30 ) is provided with a plurality of through holes cooperating with a vacuum to stabilize said containers ( 18 ).
2. The device according to claim 1 , wherein said means adapted to realize perfect adherence with bottom provided with a notch ( 20 ) of said container ( 18 ) comprises a dish ( 36 ) placed at the front end of said pusher ( 32 ) and said centering ring ( 30 ) cooperating with said pusher.
3. The device according to claim 1 , wherein said support ( 12 ) comprises a pressurized fluid inlet radial conduit ( 28 ) for ring ( 22 ) axial movement destined to radially press and expand said seal ( 24 ).
4. The device according to claim 2 , wherein said dish ( 36 ) shows a complimentary configuration to the bottom notch ( 20 ) of said containers ( 18 ) and is provided with a plurality of through holes.
5. The device according to claim 4 , wherein said support ( 12 ) comprises one or more conduits ( 31 ) through which an air vacuum is created for containers ( 18 ) stabilization through centering ring ( 30 ) and dish ( 36 ) through holes.
6. The device according claim 1 , wherein the elastic means ( 42 ) are realized from helical or cup springs.
7. The device according to claim 6 , wherein the elastic means ( 42 ) are realized from helical springs placed between a sleeve ( 44 ) that is coaxial to said shaped ring ( 22 ) and centering ring ( 30 ).
8. The device according to claim 6 , wherein said elastic means ( 42 ) realized by helical springs match, at anterior end towards centering ring ( 30 ), a bearing comprising a rear fixed part ( 46 ) and a rotating front part ( 48 ) placed in contact with centering ring ( 30 ) itself.
9. The device according to claim 8 , wherein the bearing comprising fixed rear part ( 46 ) and a rotating front part ( 48 ) is peripherally contoured by an annular member ( 50 ) coaxial to said shaped ring ( 22 ).
10. The device according to claim 1 , wherein the centering ring ( 30 ) is peripherally provided with a solid annular collar ( 52 ) matching a shoulder ( 54 ) realized in said shaped ring ( 22 ).
11. The device according to claim 1 , wherein the gripping area of said metal containers ( 18 ) extends for 10-30 mm starting from the container bottom.