Electrostatic image developing process with optimized setpoints

US6526247B2 · kind B2 · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Eric C. Stelter · Rochester, US
• Joseph E. Guth · Holley, US
• Matthias H. Regelsberger · Rochester, US
• Edward M. Eck · Lima, US

Key dates

• Filing date: May 15, 2001
• Grant date: Feb 25, 2003
• Expiry date: May 15, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G13/09
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The invention relates generally to processes for electrostatic image development, and setpoints that provide uniform image development. In particular, an apparatus and process having a magnetic brush that implements hard carriers and a rotating magnetic core within a shell is disclosed. The process implements one or more of the following optimum setpoints: a range of shell surface speeds that provide uniform toning density, a range of shell surface speeds that prevent toner plate-out, a skive spacing that minimizes sensitivity to variation, a magnetic core speed that minimizes sensitivity to variation, and an imaging member spacing that minimizes sensitivity to variation.