Carton having an automatically openable cover

Claim 1

A CARTON HAVING AN AUTOMATICALLY OPENING COVER, SAID CARTON COMPRISING AN OUTER SLEEVE-LIKE CASING HAVING AN UNAPERTURED REAR PANEL WHICH EXTENDS THE FULL LENGTH OF THE OUTER CASING, A TAB ATTACHED TO THE EDGE OF THE REAR PANEL AT THE UPPER EDGE THEREOF AND BENT DOWNWARDLY ALONG THE INSIDE SURFACE OF THE REAR PANEL, AN INNER CASING SLIDABLE WITHIN SAID OUTER CASING AND HAVING A TOP PANEL, AND AT LEAST A COVER REAR PANEL AND COVER SIDE PANELS DEPENDING THEREFROM, THE COVER REAR PANEL BEING HINGED TO THE UPPER EDGE OF THE REAR PANEL OF THE INNER CASING, AND AN ACTUATING MEMBER HINGEDLY SECURED TO THE REAR EDGE OF THE COVER TOP PANEL AND EXTENDING DOWNWARDLY BETWEEN THE REAR PANELS OF THE INNER AND OUTER CASINGS, SAID ACTUATING MEMBER HAVING AN APERTURE THEREIN AT A POINT SPACED BELOW THE EDGE THEREOF HINGED TO SAID COVER TOP PANEL AND IN WHICH SAID TAB ENGAGES TO STOP UPWARD MOVEMENT OF SAID INNER CASING RELATIVE TO SAID OUTER CASING WHEN THE INNER CASING IS URGED UPWARDLY SAID ACTUATING MEMBER LYING ENTIRELY WITHIN SAID OUTER CASING WHEN SAID INNER CASING IS WITHIN SAID OUTER CASING WITH THE COVER CLOSED AND THE COVER TOP PANEL LEVEL WITH THE UPPER EDGE OF THE REAR PANEL OF THE OUTER CASING, WHEREBY THE COVER IS PIVOTED REARWARDLY ON FURTHER UPWARD MOVEMENT OF SAID INNER CASING RELATIVE TO SAID OUTER CASING.