Sheet stack receptacle

Claim 1

A receptacle comprising a base for supporting a stack of sheets, an edge margin guide disposed perpendicular to the base for abutting a side of the stack, the guide being mounted so as to be movable relative to the base to accommodate stacks of different dimensions, a longitudinal bar disposed below the base and formed around an axis which is parallel to the direction of movement of the guide, the bar being mounted to rotate around the axis and having a plurality of recesses formed in the surface of the bar which are perpendicular to and spaced along the axis, each recess having an end which merges into the surface of the bar, and a lug mounted for movement with the edge margin guide and biased into engagement with the bar over the range of positions of the edge margin guide relative to the base, the lug being adapted to engage a selected one of the recesses to retain the guide in a desired position, whereby the guide can be moved from one desired position to another desired position by rotating the bar so that the lug passes through the merging end of a first selected recess and out of engagement with the recess, moving the guide and lug along the axis of the bar to a position opposite a second selected recess, and rotating the bar so that the lug passes through the merging end of the second selected recess and into engagement therewith.