COLD FORMING DEVELOPER TUBES
Original Publication Date: 1992-Oct-31
Included in the Prior Art Database: 2004-Apr-06
Xerox Disclosure Journal
In the development of an electrostatic latent image the toner and/or carrier material is transported from a sup ly to the photoreceptor bearing the image. roll such as is commonly used in magnetic brush development. A low cost method for making these tubes is to cold work a blank tube through a set of round rotating dies which have a serration pattern cut into the surface which is generally straight and parallel to the axis of the die. The dies are mounted in a thru-feed or in-feed thread rolling machine and the tube is fed into the dies and passes between the dies cold forming the seriation pattern on the outside of the tube. The correct combination of die angle and set up angle will produce a seriation pattern that is straight and parallel to the longitudinal axis of the tube. This surface finish will effectively transfer toner and carrier materials around the tube.