Method and apparatus for setting registration in a printing machine

US6532873B2 · kind B2 · utility

Assignee

• NexPress Solutions LLC · US

Inventors

• Heiko Hunold · Wattenbek, DE
• Ralph Petersen · West Allis, US
• Patrick Metzler · Gettorf, DE

Key dates

• Filing date: May 15, 2001
• Grant date: Mar 18, 2003
• Expiry date: Jun 9, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G2215/0161
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Setting registration, with detection of the entry of a printing substrate (2) into a printing machine (1) and calculation of the beginning of digital production of color separations (3, 3′, 3″, 3′″) to achieve an in-register position of the color separation prints (4, 4′, 4″, 4′″) on a printing substrate (2). This is achieved by the printing substrate (2) being detected before it enters the printing machine (1) and, following this detection, the relative positions of the color separations (3, 3′, 3″, 3′″) being calculated, and by precise detection of the leading edge (5) of the printing substrate (2) being performed as it enters the printing machine (1) and being made the basis for determining the starts of the production of the color separations (3, 3′, 3″, 3′″), their relative position having been precalculated.