Display sign

Claim 1

AN ADVERTISING SIGN APPARATUS COMPRISING A RIGID FRAME INCLUDING A PAIR OF UPRIGHT CHANNELS HAVING THEIR OPEN SIDES IN SPACED PARALLEL ALIGNED RELATION TO EACH OTHER AND OPENING TOWARD EACH OTHER, MEANS FOR SUPPORTING THE CHANNELS IN UPRIGHT POSITION, SAID CHANNELS BEING OPEN AT THEIR UPPER ENDS, AN OPEN TOP CONTAINER HAVING TRANSPARENT IMPERFORATE FRONT AND REAR WALLS SPACED FLATWISE FROM EACH OTHER WITH THE SPACE THEREBETWEEN CLOSED IN SEALED RELATION AT THE LATERAL EDGES OF THE FRONT AND REAR WALLS BY SIDE WALLS, RESPECTIVELY, THE LATERAL EDGES OF THE CONTAINER BEING SLIDABLY SUPPORTED IN THE CHANNELS FOR VERTICAL MOVEMENT THEREALONG, SAID CONTAINER BEING INSERTABLE IN, AND REMOVABLE FROM THE CHANNELS THROUGH THE OPEN UPPER ENDS OF THE CHANNELS, MEANS ON THE FRAME LIMITING THE DOWNWARD MOVEMENT OF THE CONTAINER RELATIVE TO THE CHANNELS AND POSITIVELY CONSTRAINING THE CONTAINER TO A POSITION WHEREIN THE UPPER MARGIN OF THE CONTAINER EXTENDS A SUBSTANTIAL DISTANCE ABOVE THE FRAME SUCH THAT THE UPPER MARGIN CAN BE GRASPED BY THE FINGERS FOR LIFTING THE CONTAINER UPWARDLY OUT OF THE FRAME, A DETACHABLE COVER ON AND CLOSING THE OPEN TOP OF THE CONTAINER AND HAVING FRONT AND REAR WALLS IN OVERLAPPING RELATION TO SAID PORTION OF THE MARGINS ABOVE THE FRAME, AND A STIFF DOUBLE FACE REMOVABLE PLACARD RECEIVABLE IN THE CONTAINER THROUGH THE OPEN TOP THEREOF, SAID PLACARD BEING SUBSTANTIALLY COEXTENSIVE WITH SAID FRONT AND REAR WALLS OF THE CONTAINER.