Process for preparing selectively stressed endless belts

US5316651A · kind A · utility

Assignee

• Xerox Corporation · US

Inventors

• William G. Herbert · Ellisville, US
• David J. Hogle · Williamson, US
• Steven J. Grammatica · Penfield, US
• Peter Schmitt · Erlangen, DE
• Ronald E. Jansen · Stuart, US
• Mark S. Thomas · Williamson, US

Key dates

• Filing date: Dec 3, 1991
• Grant date: May 31, 1994
• Expiry date: Dec 3, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D1/02
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

An endless metal belt resistant to failure due to stress induced by bending contains an internal stress gradient of radially outward increasing compressive stress which opposes external stress applied to the belt. The belt can be made by an electroforming process. While electroforming, at least one operating parameter selected from bath temperature, current density, agitation, and stress reducer concentration is adjusted to cause the internal stress to gradually increase, compressively, from the radially inner surface of the belt to the radially outer surface of the belt. The internal stress preferably increases at a substantially constant rate and may range from about 160,000 psi tensile at the inner surface to about 120,000 psi compressive at the outer surface.