Abstract: A sheet positioning mechanism for the feed table of a sheet-fed printing press which includes a set of releasable front stops and a side guide, with a wiper adjacent the side guide, the wiper having a limited zone of action. The sheets are fed in a straight stream, in shingled relation, along the feed table, the stream being laterally spaced from the side guide and out of the zone of action. A pair of swingable suckers are provided near the front end of the table and laterally spaced below the sheet path, the suckers being swung forwardly in unison about an arcuate path synchronized with the arrival of the sheet to be positioned so that such sheet is transported both forwardly in the direction of the front stops and laterally from its position in the stream into the zone of action of the wiper so that the wiper acts exclusively on the sheet to be positioned without interference by the overlapped closely following sheet.