Can plastic lid having a tamper evident portion

Abstract

An improvement in a plastic lid for a can of the type which comprises a tubular body ( 10 ) having an upper end ( 13 ) carrying a seat ( 16 ) for the lid ( 20 ) which comprises a sealing portion ( 21 ) provided with an external edge ( 21 b ) and a tamper evident portion ( 25 ) comprising a lower skirt ( 25 a ), to be seated around part of the upper end ( 13 ) of the tubular body ( 10 ) and which is incorporated, to the external edge ( 21 b ) of the sealing portion ( 21 b ), through bridges ( 26 ) which are broken upon the first opening of the lid ( 20 ). The bridges ( 26 ) are axially disposed around a circumferential extension of the upper end ( 13 ) of the tubular body ( 10 ), in order to connect an upper edge ( 25 b ) of the lower skirt ( 25 a ) with the external edge ( 21 b ) of the sealing portion ( 21 ) in points which are angularly spaced apart.

1 . An improvement in a plastic lid for a can of the type which comprises a tubular body having a lower end and an upper end carrying a seat for the hermetic seating of a lid which comprises, in a single piece, a sealing portion, removably seated and retained in the seat and which is provided with an external edge projecting radially outwardly from the seat; a tamper evident portion comprising a lower skirt, to be seated around part of the upper end of the tubular body and which is superiorly incorporated, through bridges, to the external edge of the sealing portion, the tamper evident portion presenting an interruption extending along at least part of the height of the lower skirt, the sealing portion incorporating, at its external edge, a gripping tab projecting through said interruption (me) of the tamper evident portion, said bridges being broken when submitted to a certain pulling force, which separates the tamper evident portion from the sealing portion upon the first opening of the lid, characterized in that the bridges are axially disposed around a circumferential extension of the upper end of the tubular body, in order to connect an upper edge of the lower skirt with the external edge of the sealing portion in points which are angularly spaced apart, said gripping tab maintaining a gape with the lower skirt.  
   
   
       2 . The improvement as set forth in  claim 1 , characterized in that the external end of the sealing portion incorporates a small cylindrical lower flap surrounding a circumferential extension of the upper ( 13 ) end of the tubular body ( 10 ) from which the bridges depend.  
   
   
       3 . The improvement as set forth in  claim 1 , in which the upper end of the tubular body secures, by a double seam, an annular wall in which is defined the seat) for the seating of the lid, characterized in that the lower skirt incorporates an internal circumferential projection, axially spaced from the external edge of the sealing portion and which is dimensioned to be seated and axially locked under the double seam, around the tubular body.  
   
   
       4 . The improvement as set forth in  claim 1 , characterized in that the gripping tab is substantially leveled with the lower skirt.  
   
   
       5 . The improvement as set forth in  claim 1 , characterized in that the tamper evident portion (comprises at least one breakable lock connecting the gripping tab with the lower skirt.  
   
   
       6 . The improvement as set forth in  claim 1 , characterized in that the lower skirt incorporates the ends of a bridge, circumferentially extending over the interruption of the tamper evident portion and over the gripping tab, a first end of said ends of the bridge being incorporated to the lower skirt through connecting means which are broken when said first end is forced away from the lower skirt, in order to liberate the manual access to the gripping tab.  
   
   
       7 . The improvement as set forth in  claim 5 , characterized in that the bridge has its first end superposed to the lower skirt and incorporated thereto by two connecting means which are circumferentially spaced apart.  
   
   
       8 . The improvement as set forth in  claim 1 , characterized in that the upper end of the sealing portion incorporates a circumferential upper rib, projecting over the upper end of the tubular body, so as to fit loosely and telescopically in the lower end of another tubular body stacked over said tubular body.  
   
   
       9 . The improvement as set forth in  2 , in which the upper end of the tubular body secures, by a double seam, an annular wall in which is defined the seat) for the seating of the lid, characterized in that the lower skirt incorporates an internal circumferential projection, axially spaced from the external edge of the sealing portion and which is dimensioned to be seated and axially locked under the double seam, around the tubular body.