Lid for jars for preserves

Abstract

Lid for a preserving jar (10), said jar (10) being provided at the circular mouth (11) with a thread (13) formed on the side wall (12) thereof, and said 1 id (1) comprising a circular c losing plane (101) and a continuous cylindrical side wall (201), made of stainless steel sheet piece, said side wall being provided with a plurality of cavities (211, 221, 231) on the outer face of said wall 1(201), corresponding to reliefs on the inner face, and said reliefs (211, 221, 231) being arranged along a helical path (13′) corresponding to the pitch of the thread (13) on the side wall (12) of the mouth (11) of the vessel (10), and being provided with removable sealing means (301) arranged on the inner surface of the closing plane (101).

1 . Lid for a preserving jar ( 10 ), said jar ( 10 ) being provided at the circular mouth ( 11 ) with a thread ( 13 ) formed on the side wall  12 ) thereof, and said lid ( 1 ) comprising a circular closing plane ( 101 ) and a continuous cylindrical side wall ( 201 ), made of stainless steel sheet piece, said side wall being provided with a plurality of cavities ( 211 ,  221 ,  231 ) on the outer face of said wall ( 201 ), corresponding to reliefs on the inner face, and said reliefs ( 211 ,  221 ,  231 ) being arranged along a helical path ( 13 ′) corresponding to the pitch of the thread ( 13 ) on the side wall ( 12 ) of the mouth ( 11 ) of the vessel ( 10 ), and being provided with removable sealing means ( 301 ) arranged on the inner surface of the closing plane ( 101 ). 
     
     
         2 . Lid according to  claim 1 , wherein the side wall ( 201 ) has a height ranging from 18% to 25% of the diameter of the end plate ( 101 ) of the lid. 
     
     
         3 . Lid according to  claim 1 , wherein said cavities ( 211 ,  221 ,  231 ), and corresponding reliefs, are formed by punching the side wall. 
     
     
         4 . Lid according to  claim 1 , wherein said reliefs ( 211 ,  221 ,  231 ) are substantially formed with the height equal to the height of the threading ( 13 ) on the side wall of the vessel mouth ( 10 ). 
     
     
         5 . Lid according to  claim 1 , wherein at least three reliefs ( 211 ,  221 ,  231 ) formed on said wall are provided. 
     
     
         6 . Lid according to  claim 5 , wherein said reliefs ( 211 ,  221 ,  231 ) are angularly equidistant from each other. 
     
     
         7 . Lid according to  claim 1 , wherein a bell-shaped relief ( 241 ) is formed on the side wall ( 201 ) of said lid projecting outwardly, with a corresponding cavity inwardly, and tapered from the trailing edge of the side wall toward the closing plane. 
     
     
         8 . Lid according to  claim 7 , wherein said bell-shaped relief ( 241 ) has a height that may range from 25% to 50% of the side wall height, and a maximum width at the base from 70% to 90% of the wall height. 
     
     
         9 . Lid according to  claim 1 , wherein the closing plane ( 101 ) is provided with an annular perimeter relief ( 121 ), contiguous with the side wall ( 201 ), which protrudes from the closing plane ( 101 ) in the order of 5-7% of the height of the side wall ( 201 ), and a spherical cap relief ( 111 ), which has a maximum protrusion from the closure plane ( 101 ) in the order of 5-7% of the height of the side wall ( 201 ). 
     
     
         10 . Lid according to  claim 1 , in which the sealing means is a gasket ( 301 ) made of natural rubber.