Apparatus for spanning a center-opening saw blade

US4637369A · kind A · utility

Assignee

• GMN Georg Muller Nurnberg AG · DE

Inventors

• Harald Petermann · Nuremberg, DE
• Peter Bauer · Nuremberg, DE

Key dates

• Filing date: Nov 22, 1985
• Grant date: Jan 20, 1987
• Expiry date: Nov 22, 2005

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B24D5/16
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A center-opening saw blade having an inner sawing edge is spanned or tensioned to provide an accurate, high quality cut by apparatus including inner and outer clamping collars between which an outer peripheral edge region of the saw blade is clamped, a spanner ring having an inner edge and an outer centering heel, the clamping collars being tightly affixed to the spanner ring with the clamping rings positioned in the centering heel with the inner edge of the spanner ring engaging an inner region of the saw blade to impart an initial stress thereto. A form ring is axially slidably mounted within the clamping collars and is slidable to engage an intermediate portion of the saw blade between the outer peripheral edge region clamped between the clamping collars and the inner region engaged by the inner edge of the spanner ring to impart a fine adjustment stress to the saw blade.