Electrophotographic roller with resistance to nip banding

US8448336B2 · kind B2 · utility

Assignee

• Lexmark International, Inc. · US

Inventors

• Jane Elece Barcelo · Wilmore, US
• Bradley Beach · Lexington, US
• Liam Ruan de Paor · Lexington, US
• Mark Duane Foster · Lexington, US
• Terence E. Franey · Lexington, US
• Bhaskar Gopalanarayanan · Lexington, US
• Kevin Scott Kennedy · Lexington, US
• Kelly Ann Killeen · Lexington, US
• Chao Li · Franklin, US
• Jean Marie Massie · Lexington, US
• Ronald Lloyd Roe · Lexington, US
• Richard Nicholas Schrantz, JR. · Nicholasville, US
• Scott Alan Searls · Richmond, US
• Robert Francis Soto · Lexington, US
• Donald Wayne Stafford · Georgetown, US

Key dates

• Filing date: Jul 3, 2008
• Grant date: May 28, 2013
• Expiry date: Feb 27, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49563
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An endless electrophotographic member, such as a developer roller, which indicates an improved resistance to nip banding. The improvement to nip banding may be provided by the use of an organic salt within a roller surface region. The roller may provide, at a nip location, a resistive surface layer having an electrical resistance that avoids the development of nip banding and relatively dark regions on printed media.