Abstract: In a typical print media sheets feeding system, sheet stacks of different dimensions are stacked into, and then fed from, a sheet stacking tray having opposing stack edge guides, at least one of which the operator must first manually reposition close to the sides of a stack being newly loaded of different dimensions to insure proper sheet feeding. There is provided here an electronic stack edge guide positioning confirmation system with a repositionable sheet stack edge proximity sensing system repositioning with the repositionable stack edge guide and providing an automatic warning signal against the feeding of sheets if the opposing edge guides are not positioned in close proximity with the corresponding opposing sides of the particular stack of sheet currently loaded in the tray, if the width of the latest loaded stack differs and/or the side guides have not been properly reset to the currently loaded stack size.

Abstract: An apparatus for determining the height of a stack of sheet media in a supply bin is provided. The apparatus includes a sensor and a substantially linearly extending member. The member is operatively associated with the optical sensor to permit relative motion between the sensor and the member. At least one of the sensor and the member moves with the supply bin. The sensor generates a signal indicative of the relative motion between the sensor and the member. The relative motion provides an indication of the height of the stack of the sheet media.