Backward openable container with a device to prevent its inner tray from being slipped downward

Claim 1

A carton having an automatically opening cover, said carton comprising: an outer shell having an unapertured shell bottom wall which extends the full length of said outer shell; an extension attached to the upper portion of said shell bottom wall of said outer shell and bent downwardly along an inside surface thereof; an inner tray slidably disposed inside said outer shell and having a tray bottom wall and a tray top wall disposed parallel to one another and connected by a tray lower end wall, and an upper portion hinged to said tray bottom wall defining a lid wall having a flap extending from a rear portion thereof downwardly between said tray bottom wall and said shell bottom wall, said flap having a free lower end; said tray bottom wall of said inner tray having a first cutout defining an upwardly directed tongue pointing towards and overlapping said free lower end of said flap; said flap having a second cutout and forming a hook, the latter being folded and pointing in an upward direction of said upper portion of said inner tray and engagingly overlapping said downwardly bent extension of said outer shell; said outer shell having a shell top wall, said shell top wall and said shell bottom wall being disposed parallel to one another, said shell top wall and said shell bottom wall having lower portions thereof; two continuous pieces connecting said lower portion of said shell top wall to said lower portion of said shell bottom wall, said two continuous pieces being formed with a gap in a middle of said two continuous pieces; and said tray lower end wall being disposed adjacent said continuous pieces of said outer shell and adjacent said gap, whereby the inner tray may be pushed upwardly within said outer shell by pressing said tray lower end wall through said gap in said continuous pieces.