Swing-top functional card-filing systems

Claim 1

A SEMI-ROTARY FILE COMPRISING; (A) AN OPEN TOP HOUSING INCLUDING A PAIR OF OPPOSITELY DISPOSED SIDE WALLS, AND (B) OPPOSED END WALLS INTERCONNECTED BETWEEN SAID SIDE WALLS, (C) EACH OF SAID END WALLS BEING INCLINED UPWARDLY AND OUTWARDLY, SAID END WALLS TERMINATING AT A POINT INTERMEDIATE THE HEIGHT OF SAID SIDE WALLS, (D) A SWING-TOP CLOSURE, (E) SAID CLOSURE INCLUDING A WALL PORTION DEFINING THE TOP OF SAID FILE IN THE CLOSED POSITION, AND A PAIR OF END SECTIONS FLARING OUTWARDLY AND DOWNWARDLY FROM SAID TOP OF THE CLOSURE WHEN IN THE CLOSED POSITION THEREOF, (F) MEANS FOR PIVOTALLY CONNECTING SAID CLOSURE ABOUT FIXED PIVOTS BETWEEN SAID SIDE WALLS WHEREBY SAID CLOSURE CAN BE SWUNG BETWEEN OPEN AND CLOSED POSITIONS ABOUT SAID FIXED PIVOTS, (G) AND MEANS CONNECTED BETWEEN TEH END SECTIONS OF SAID CLOSURE FOR HOLDING A FILING CARD THEREON IN EITHER POSITION OF SAID CLOSURE.