Determination of the position of sheets in a printer sheet feeder using an array of three sensors that also allow the position of the sheets relative to the middle of the printer and the paper format to be determined

摘要

Sheet feeder has a sheet stack support plate with a sheet separator for splitting off individual sheets. An arrangement for aligning the sheets has three sensors fixed in the sheet feeder (1) for determining the position of both sides and the rear edge of the sheet stack (5). The sensors can be used to determine the position of the sheet stack relative to the center of the machine (21) or for determining the format of the sheets.