Negative insert holder for business directories

Claim 1

In a directory sign for displaying a plurality of name bearing media in a vertical column within a frame structure, a plurality of identical inserts for holding respectively said media, each insert including: a front wall having a cut-out window through which the name on a medium inserted behind said wall is visible, the upper and lower edges of said wall including upper and lower flange means, the upper flange means including an upper flange extending rearwardly from the upper edge of said insert, said upper flange having an upwardly extending portion turning into a forwardly extending portion terminating short of the plane of said front wall by a given distance to define an upper elongated channel, the lower flange means including a lower flange extending rearwardly from a point spaced a given distance above the lower edge of said insert, said lower edge turning rearwardly to define with said lower flange an oppositely facing lower channel, said upper channel being dimensioned to receive the turned in portion of the lower edge of the next adjacent insert thereabove such that the oppositely facing lower channel of the next adjacent insert receives the forwardly extending portion of the first-mentioned insert, so that a light proof intercoupling is effected between adjacent ones of said inserts, said first mentioned given distance corresponding to the thickness of said front wall so that the front walls of all said inserts when intercoupled together in series are substantially coplanar, any one insert being slidable horizontally from between the adjacent inserts to effect a change in the order of the naMes.