| 摘要 |
A posting tray, or similar record holding tray, includes two side rails which are adjustably movable toward and away from one another, and are releasably fixable in any given position of adjustment, to suit the tray for record cards of various different widths. Each side rail is part of a C-shaped member having two laterally inwardly extending legs at its opposite ends. The legs are connected to the front and rear walls of the tray. The two legs associated with each wall overlap one another throughout a portion of the range of adjustable movement of the side rails, and are out of such overlapping relationship throughout another portion of the range of adjustable movement, to maximize the side rail spacing variation range. The overlap of the legs which does occur may be accommodated in either the vertical plane or the horizontal plane.
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