Electrostatic image developing method and apparatus using a drum photoconductor and hard magnetic carriers

US6571077B2 · kind B2 · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• John R. Thompson · Denver, US
• Timothy G. Armstrong · Rochester, US
• Richard George Allen · Rochester, US
• Thomas K. Hilbert · Rochester, US
• Christopher S. Garcia · Malvern, US

Key dates

• Filing date: May 16, 2001
• Grant date: May 27, 2003
• Expiry date: May 16, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G15/09
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The invention relates generally to apparatus for electrostatic image development and, in particular, apparatus that implement a magnetic brush with a drum photoconductor. According to an aspect of the invention, a method and apparatus for developing an electrostatic image are provided implementing a drum photoconductor and a magnetic brush contacting the drum photoconductor. The magnetic brush includes a mixture of toner and hard magnetic carriers.