An apparatus, method and system for a feeding a sheet in a document reproduction machine. A feedbox is contained within a document reproduction machine. Within the feedbox, an elevator moves at least one sheet to the upper portion of the feedbox, to a stack height finger, for feeding the sheet into a feed device. At least one sensor, located at the upper portion of the feedbox, detects the location of the sheet. The location information is sent from the sensor to a data processing device. The data processing device sends information to an actuating device. The actuating device may cause one or more plungers to move through apertures in the elevator. The plungers will result in a substantially flat sheet. The sheet is then fed into the feed device.