Xerox Corporation

Crystal A Martin

Edward L Schlueter, Jr

Nero R Lindblad

James F Smith

Lucille M Sharf

Herbert C Relyea

A cleaning blade holder that has a top and bottom portion. The bottom portion of the blade holder contains a groove into which a protruding rib from the back side surface of the blade fits in order to dummy proof the orientation of the blade and to secure the fit. An alternative bottom portion contains a plurality of nodules along the bottom portion surface that interconnect with apertures in corresponding positions to the nubbins along the length of the blade body. The blade holder holds the blade body in a horizontal position allowing the edges on either side of the blade body to extend from the holder. Each side of the blade body fosters two edges. Rotation of the blade holder produces a new cleaning edge. Two other cleaning edges are produced by reversing the blade body in the holder and rotating the blade holder again between positions one and two.

180 degree rotating cleaning blade holder

An apparatus for cleaning an imaging member has a blade holder and a blade made of a polyurethane elastomer obtained by the reaction of a polytetramethylene ether glycol having the formula HO[(CH.sub.2).sub.4 O].sub.n H where n is from 10 to 60, preferably 55 to 60, and from about 20 to about 95 parts preferably 22 to 26 parts, by weight per 100 parts by weight of said glycol of a diisocyanate selected from the group consisting of diphenylmethane diisocyanates, toluene diisocyanates, naphthalene diisocyanates and blends thereof and a sufficient amount of cross linking agents to provide a crosslinked elastomer, said cross linking agents comprising a mixture of from about 75% to 60% by weight of a diol having the formula HO(R.sub.1)OH where R.sub.1 is a straight or branched chain alkyl group having from 2 to 12 carbon atoms and from about 25% to 40% by weight of a triol having the formula: R'--C--[(OH).sub.a (CH.sub.2 OH).sub.b ] where R' is H, CH.sub.3 or C.sub.2 H.sub.5, a is 0 or 1, b is 2 or 3 and a+b=3.

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Rochester, NY, United States of America

Crystal A Martin