Endless flexible abrasive belt having soldered seams and a method for making such seams

Abstract

Abstract An endless flexible abrasive belt is made up from one or more pieces of abrasive sheet material. Abrasive sheet material of the kind referred to comprises a flexible backing member of paper or fabric, one side of which is provided with a coating of abrasive grits. The abrasive grits are anchored to the flexible backing member by one or more layers of glue. In order to form an endless belt the piece or pieces have to be joined at a pair of opposite or at successive edges respectively. The joint between abutting edges is made with thermoplastic resin as a solder so as to form a soldered seam the thickness of which is essentially equal to the thickness of the abrasive sheet material. Fiber reinforced or non-reinforced polyamide is a suitable material for the thermoplastic solder, and results in joints having good flexural and tensile strength. The soldering operation is simple and comprises the fixing of the edges to be joined in spaced or abutting parallel relation to one another so as to form a narrow channel between the edges and melting thermoplastic resin into the channel to form a solder seam having a thickness which should not exceed the thickness of adjacent portions of the belt, so as to cause no ''''chatter marks'''' on a working piece.

Inventors

• 👤 T Sandell

Bibliographic Details