Method and control device for preventing register errors

US6836635B2 · kind B2 · utility

Assignee

• NexPress Solutions LLC · US

Inventors

• Patrick Metzler · Gettorf, DE
• Stefan Schrader · Kiel, DE

Key dates

• Filing date: Feb 7, 2003
• Grant date: Dec 28, 2004
• Expiry date: Feb 7, 2023

Classification

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

Abstract

Printers wherein a snub pulley gripping the conveyor belt from below changes contact force, a first register error occurs; and due to change of the spacing between the image lines on the sheet change, a second register error occurs. To prevent the first register error, time-lags of the first start signals (START OF FRAME) for the application of image lines are changed; and to prevent a second register error, time-lags of the second start signals (START OF LINE) for the application of image frames are changed.