Roller apparatus for a flexible web

A roller apparatus for a flexible web such as a chart, said flexible web being provided on at least one free margin thereof with an elongated web mounting means of predetermined cross-sectional dimensions which are greater than the thickness of said flexible webbing material, said roller apparatus comprising:

• rigid, elongated tubular roll means for receiving and mounting said web mounting means interiorly thereof and including in a peripheral wall portion thereof a longitudinal through slot of a cross-sectional dimension smaller than that of said web mounting means and greater than the thickness of said web, an end cap mountable to either end of said tubular roll means, means removably mounting at least one of said end caps to said tubular roll means and including releasable telescopic engagement means between said one end cap and an adjacent end portion of the tubular roll means independent of the interior mounting of the web mounting means to provide for rotation of said one end cap in unison with the tubular roll means when assembled and, upon removal of said one end up, for permitting slidable insertion of said web mounting means with said flexible webbing affixed thereto into said tubular roll means with said flexible webbing depending through and below said longitudinal slot, whereby said web mounting means and said flexible webbing depending therefrom are slidably insertable into the tubular roll means selectively from either right-hand or left-hand margins of said flexible webbing so as to selectively reveal either surface of said flexible webbing with respect to a fixed observer.