Notebook

Claim 1

IN A BOOK STRUCTURE, THE COMBINATION INCLUDING TWO RELATIVELY THICK COVERS AND A MULTIPLICITY OF RELATIVELY THIN LEAVES, SAID COVERS AND LEAVES BEING BOUND TOGETHER AT THEIR UPPER EDGES, THE COVER BEING ADAPTED TO REST UPON THEIR LOWER EDGES IN EASEL CONFORMATION SO THAT ANY SELECTED LEAF MAY BE DISPLAYED, A TONGUE HINGEDLY CONNECTED TO A FIRST OF SAID COVERS AT A POINT SUBSTANTIALLY ABOVE SAID LOWER EDGES, SAID TONGUE BEING PIERCED FROM THE FIRST COVER LYING WHOLLY WITHIN THE CONFINES OF AND SUBSTANTIALLY ALONG THE LONGITUDINAL AXIS OF SAID FIRST COVER AND BEING FORMED AT ITS UNHINGED END TO DEFINE A HOOK MEMBER, AND A SECOND OF SAID COVERS HAVING A NARROW TRANSVERSE SLOT THEREIN, SAID SLOT BEING LATERALLY OFFSET RELATIVE TO THE LONGITUDINAL AXIS OF SAID COVERS AND SAID TONGUE, SAID HOOK MEMBER BEING ADAPTED TO BE MANUALLY INSERTED INTO SAID SLOT AND TO SLIDE LATERALLY INTO ENGAGEMENT WITH THE UNCUT WALL OF THE SECOND COVER AT THE END OF SAID SLOT SO THAT SAID COVERS CAN BE LATCHED TOGETHER IN EASEL CONFORMATION, SAID TONGUE BEING STRESSED LATERALLY WHEN IN LATCHED POSITION IN SAID SLOT SO AS TO APPLY STRESSES TO SAID TONGUE, COVER AND BINDING MEANS, WHEREBY THE HOOK OF THE TONGUE TENDS TO MOVE INTO ENGAGEMENT WITH THE COVER AT THE END OF THE SLOT TOWARD WHICH IT IS BIASED.