Method and device for aligning stacked sheets in a feeder of a sheet-processing machine

US6533269B2 · kind B2 · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Hans Butterfass · Heidelberg, DE
• Wolfgang Dolz · Heidelberg, DE
• Jurgen Zeltner · Heidelberg, DE

Key dates

• Filing date: Jan 5, 2001
• Grant date: Mar 18, 2003
• Expiry date: Jul 13, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2513/10
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A method and device for aligning stacked or piled sheets in a feeder of a sheet-processing machine, wherein a sheet to be separated is pivotable about a vertical axis extending at least approximately orthogonally to a transport direction of the sheet, as viewed in the transport direction thereof, in order to correct a skewed position of a leading edge thereof relative to at least one front lay. The method further includes determining, relative to the front lay, a skewed position of sheets oncoming at the front lay or resting at the top of the sheet pile, and displacing, transversely or approximately transversely to the transport direction, either the sheet pile, before the sheet is lifted therefrom, or the sheet lifted off the sheet pile, depending upon the determined skewed position, over a displacement distance that is of such length that, after the skewed-position correction, there is a defined spaced distance between a side edge of the sheet and at least one side lay.