Rigid packet with a hinged lid

Abstract

A packet ( 1 ) of rigid type with a hinged lid ( 5 ), appearing substantially parallelepiped in shape with sharp longitudinal corner edges ( 9 ), presents a front face ( 6 ), a rear face ( 7 ), and two convexly profiled flank faces ( 8 ) each presenting a flat central portion ( 12 ) and two precreased radiused lateral bands ( 17 ) merging along one side with the flat central portion ( 12 ) and joined along the other respectively to the front face ( 6 ) and to the rear face ( 7 ) by way of the sharp corner edges ( 9 ).

1 ) A rigid packet with a hinged lid, appearing substantially as a rectangular parallelepiped and comprising a front face ( 6 ) and a rear face ( 7 ) substantially parallel one with another, also two flank faces ( 8 ) disposed parallel one with another and substantially perpendicular to the front and rear faces ( 6 ,  7 ), wherein the front and rear faces ( 6 ,  7 ) are joined to the flank faces ( 8 ) along relative sharp corner edges ( 9 ), characterized in that each of the flank faces ( 8 ) presents a respective flat central portion ( 12 ) and two lateral bands ( 17 ), and in that each lateral band presents a curved profile with the concave side directed inwards, merged on the one hand with the relative flat central portion ( 12 ) and joined on the other to the front face ( 6 ) or rear face ( 7 ) along the relative sharp corner edge ( 9 ).  
     
     
         2 ) A packet as in  claim 1 , wherein the lateral bands ( 17 ) present a plurality of longitudinal crease lines ( 18 ).  
     
     
         3 ) A packet as in  claim 1  or  2 , wherein the distance between the flat central portions ( 12 ) is greater than the distance between the sharp corner edges ( 9 ), measured parallel respectively to the front face ( 6 ) and to the rear face ( 7 ).  
     
     
         4 ) A packet as in  claims 1  to  3 , comprising a container ( 3 ) of cupped appearance with an open top end ( 4 ), a lid ( 5 ) likewise of cupped appearance hinged to the open top end ( 4 ) and rotatable between positions in which the container ( 3 ) is open and closed, and a stiffening frame ( 28 ) anchored to the container ( 3 ) and projecting in part from the open top end ( 4 ).  
     
     
         5 ) A packet as in  claim 4 , wherein the frame ( 28 ) presents a flat breast piece ( 29 ) destined to adhere in part to the inside of the front face ( 6 ) of the packet, and two side pieces ( 30 ) each presenting a flat portion ( 31 ) destined to adhere to the respective inside surface of the flat central portion ( 12 ) presented by the relative flank face ( 8 ) of the packet ( 1 ), also two respective precreased lateral bands ( 32 ) destined to adhere in part to the inside surfaces of the lateral bands ( 17 ) presented by the flank face ( 8 ), the flat central portions ( 31 ) of the side pieces ( 30 ) being connected by the lateral bands ( 32 ) to the breast piece ( 29 ) of the frame ( 28 ) by way of respective sharp corner edges ( 33 ).  
     
     
         6 ) A packet as in  claim 5 , fashioned from a flat diecut blank ( 37 ) of cardboard or similar material, referable to a predominating longitudinal axis ( 38 ) and presenting a substantially rectangular outline.  
     
     
         7 ) A packet as in  claim 6 , wherein the blank ( 37 ) presents two longitudinal crease lines ( 39 ,  40 ), and a plurality of transverse crease lines ( 44  . . .  49 ) delimiting respective front panels ( 6   a ′,  6   b ′), intermediate panels ( 10 ′,  11 ′) and rear panels ( 7   a ′,  7   b ′) of the lid ( 5 ) and of the container ( 3 ) between the longitudinal crease lines ( 39 ,  40 ), of which the front panels ( 6   a ′,  6   b ′) and the rear panels ( 7   a ′,  7   b ′) are associated on opposite sides with corresponding pairs of longitudinally oriented lateral wings ( 50 ,  51 ,  52 ,  53 ) each presenting a flat central portion ( 56 ,  57 ,  58 ,  59 ) and two precreased lateral bands ( 60 ,  61 ,  62 ,  63 ).  
     
     
         8 ) A packet as in  claim 6 , wherein the blank ( 37 ) presents two longitudinal crease lines ( 39 ,  40 ), and a plurality of transverse crease lines ( 44  . . .  49 ) delimiting respective front panels ( 6   a ′,  6   b ′), intermediate panels ( 10 ′,  11 ′) and rear panels ( 7   a ′,  7   b ′) of the lid ( 5 ) and of the container ( 3 ) between the longitudinal crease lines ( 39 ,  40 ), of which the front panels ( 6   a ′,  6   b ′) and the rear panels ( 7   a ′,  7   b ′) are associated on opposite sides with corresponding pairs of longitudinally oriented lateral wings ( 50 ,  51 ,  52 ,  53 ) each presenting a flat portion ( 56 ,  57 ,  58 ,  59 ) and one precreased lateral band ( 60 ,  61 ,  62 ,  63 ) interposed between the flat portion ( 56 ,  57 ,  58 ,  59 ) and the relative longitudinal crease line  39 ,  40 ).  
     
     
         9 ) A packet as in  claim 6 , wherein the blank ( 37 ) presents two longitudinal crease lines ( 39 ,  40 ), and a plurality of transverse crease lines ( 44  . . .  49 ) delimiting respective front panels ( 6   a ′,  6   b ′), intermediate panels ( 10 ′,  11 ′) and rear panels ( 7   a ′,  7   b ′) of the lid ( 5 ) and of the container ( 3 ) between the longitudinal crease lines ( 39 ,  40 ), of which the front panels ( 6   a ′,  6   b ′) and the rear panels ( 7   a ′,  7   b ′) are associated on opposite sides with corresponding pairs of longitudinally oriented lateral wings ( 50 ,  51 ,  52 ,  53 ) each presenting a flat portion ( 56 ,  57 ,  58 ,  59 ) and one precreased lateral band ( 60 ,  61 ,  62 ,  63 ) interposed between the flat portion ( 56 ,  57 ,  58 ,  59 ) and the relative longitudinal crease line  39 ,  40 ), the wings ( 50 ,  52 ) associated with two of the panels ( 6   a ′,  7   b ′) also presenting a second precreased lateral band ( 60 ,  62 ) on the side of the flat portion ( 56 ,  58 ) opposite from the band ( 60 ,  62 ) adjoining the crease line ( 39 ,  40 ).  
     
     
         10 ) A packet as in  claims 7  to  9 , wherein the longitudinally oriented lateral wings ( 51 ,  52 ) associated on each side with the rear panels ( 7   b ′,  7   a ′) of the container ( 3 ) and the lid ( 5 ) are furnished with respective appendages ( 54 ,  55 ) connected to the respective flat portions ( 57 ,  58 ) of the selfsame lateral wings ( 51 ,  52 ).  
     
     
         11 ) A packet as in  claim 10 , wherein the appendages ( 54 ,  55 ) comprise a substantially rectangular central portion ( 67 ) attached to the respective flat portions ( 57 ,  58 ) of the lateral wings ( 51 ,  52 ), and two lateral portions ( 68 ,  69 ) of substantially trapezoidal outline on opposite sides of the central portion ( 67 ), of which at least the sides extending from the line along which the appendages ( 54 ,  55 ) are joined to the relative flat portions ( 57 ,  58 ) present a curved outline identical to that of curved portions ( 19 ′,  20 ′) presented by the intermediate panels ( 10 ′,  11 ′).  
     
     
         12 ) A packet as in  claims 7  to  9 , wherein the intermediate panels ( 10 ′,  11 ′) are furnished on each side with respective appendages ( 54 ,  55 ) extending transversely to the longitudinal axis ( 38 ) and presenting a dimension, measured parallel to the longitudinal axis ( 38 ), substantially equal to the dimension, measured transversely to the longitudinal axis ( 38 ), presented by the flat central portions ( 56 ,  57 ,  58 ,  59 ) of the lateral wings ( 50 ,  51 ,  52 ,  53 ).