Browse Prior Art Database

FINE PORE FOAMS FOR BAR BRUSH APPLICATION

IP.com Disclosure Number: IPCOM000023670D
Original Publication Date: 1978-Oct-31
Included in the Prior Art Database: 2004-Mar-31

Publishing Venue

Xerox Disclosure Journal

Abstract

A typical prior art doctor blade cleaning apparatus for dispersing lubricant to a photoreceptor surface in the copy cycle is shown in the figureS Lubricant is abraded from bar 1 by a soft, rotating brush 2 which deposits a film of the abraded lubricant onto photoreceptor 3. Presently, bars are prepared by compression of finely powdered lubricants. This invention is directed to the manufacture of such bars having acceptable abradability by converting bulk lubricant into a fine-pore foam from which bars can be prepared by cast or extrusion techniques. Preparation of the foam involves heating the material to a temperature just above its melting point, stirring rapidly while injecting a low stream of pre-heated air into the mixture and cooling the air-entrained material, Materials which may be utilized include poly-ethylenes and modified polyethylenes having low to moderate melt viscosities (i,e,, Allied Chemical Polyethylenes AC-6, AC-6l7, AC-7, AC-6l5),