Original Publication Date: 1982-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
A roller, such as a fuser roll or paper transport roll used in electrophotographic printing machines, frequently requires an end cap in order to be driven. Previously; one-piece roll assemblies were made by rotary swaging, straight-line swaging or a combination of tube expansion and swaging. These processes have significant limitations and are not suited for manufacturing one-piece roller assemblies. A set of forming jaws can be used to radially compress an aluminum tube to achieve one-fourth tubular reductions in size with a 90 degree formed radius. Forming can be done on a mandrel to size the inside diameter. Axial compression is applied with radial compression to achieve the 90 degree radius. The forming of both ends of the tube can be done simultaneously to minimize cycle time which does not exceed about 5 seconds.