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IMPROVED PROCESS FOR MANUFACTURING MAGNETIC BRUSH ROLLS FOR XEROGRAPHIC REPRODUCTION MACHINES

IP.com Disclosure Number: IPCOM000024291D
Original Publication Date: 1980-Apr-30
Included in the Prior Art Database: 2004-Apr-02

Publishing Venue

Xerox Disclosure Journal

Abstract

This process for manufacturing a magnetic brush roll having a roughened or textured surface on the outer periphery thereof produces very accurate inside and outside diameters on the roll while simultaneously forming a textured surface with a uniform depth on the periphery of the roll. This roll is produced by the following sequence of operations. A tube 10 (see Figures 1 and 2) is placed in an engine lathe (not shown) to carry out the present process. A solid mandrel 12 attached to the headstock of the lathe runs through the inner diameter of the tube 10. The tube 10 is clamped by a collet at the headstock end of the lathe with the other end of the tube left free. After a spindle is started, three equally spaced spinning rollers 14, 16 and 18 are pressed against the outer diameter of the tube 10 to a preset stop that defines the wall thickness. The spinning rollers 14, 16 and 18 are moved along the length of the tube 10 causing the wall thickness of the tube to be reduced and causing the tube material to lfflowfl away from the headstock and toward the tailstock of the lathe to increase the length of the tube. A knurling tool 20 (see Figures 3 and 4) follows closely behind the rollers to simultaneously put a special