Chart for indicating the sales space occupancy periods of products displayed for sale

Claim 1

A MOVABLE CHART DEVICE COMPRISING; A BACK WALL; AN UPPER WALL PORTION FORMED ALONG THE UPPER EDGE OF SAID BACK WALL SUBSTANTIALLY NORMAL THERETO; A LOWER WALL PORTION FORMED ALONG THE LOWER EDGE OF SID BACK WALL SUBSTANTIALLY NORMAL THERETO; SIDE WALL PORTIONS FORMED ALONG OPPOSITE SIDE EDGES OF SID BACK WALL SUBSTANTIALLY NORMAL THERETO; AN UPPER ROLLER ROTATABLY MOUNTED ADJACENT SAID UPPER WALL AND VERTICALLY MOVABLE ALONG A PREDETERMINED PATH PARALLEL TO THE PLANE OF SID BACK WALL; SLOTTED BRACKETS AT EACH END OF SAID UPPER ROLLER FASTENED TO SAID SIDE WALLS FOR MOVABLY MOUNTING SAME AS AFORESAID; COIL SPRING MEANS HAVING ONE END FASTENED TO SAID UPPER WALL PORTION AND THE OTHER END TO SAID ROLLER AT EACH END THEREOF TENSIONED TO URGE SAME TOWARDS SAID UPPER WALL PORTION; SAID ROLLER BEING VERTICALLY DISPLACEABLE AGAINST SAID SPRING ALONG SAID PATH; A LOWER ROLLER ROTATABLY MOUNTED ADJACENT SAID LOWER WALL; AN ENDLESS BELT ENTRAINED AROUND SAID ROLLERS AND TEMSIONED BY SID SPRING MEANS; VERTICALLY SPACED INDICIA INDICATING THE DATES OF THE MONTH LOCATED ALONG AT LEAST ONE SAID SIDE WALL PORTION; HORIZONTAL LINES ON SAID BELT DIVIDING SAID BELT INTO PARALLEL INFORMATION RECEIVING AREAS OF A PREDETERMINED WIDTH EQUAL TO THE SPACING OF SAID INDICIA, SAID AREAS BEING MOVABLE INTO HORIZONTAL ALIGNMENT WITH SAID INDICIA AND MEANS FOR MANUALLY MOVING SAID BELT.