Extended life compliant doctor blade with conductive abrasive member

US5623718A · kind A · utility

Assignee

• Lexmark International, Inc. · US

Inventors

• Peter Wallace Bracken · Lexington, US
• Jeffery R. Brener · Lexington, US
• Martin Victor DiGirolamo · Lexington, US
• Donald Wayne Stafford · Georgetown, US
• Peter Wallin · Kalmar, SE

Key dates

• Filing date: Sep 6, 1995
• Grant date: Apr 22, 1997
• Expiry date: Sep 6, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G2215/0866
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Doctor blade 1 has a compliant lamination (4) having a resin film backing layer (4a) and conductive layer (4b) abrasive silicon carbide particles and conductive carbon black in a resin binder. The compliant lamination is supported on an aluminum bar 2, having a downwardly extending wall 2b. In use lamination 2 is bent under the support bar at the end of the wall, a direct turn which avoids a wedge configuration where the lamination contacts the developer roller (7). The conductive layer remains conductive as it wears during use and the avoidance of the wedge prevents a build-up of toner at the nip during use, both of which make possible long effective useful operation of this doctor blade.