Xerox Corporation

Thomas C Parker

Edward L Schlueter, Jr

Robert M Ferguson

James F Smith

Henry L Manuel

Robert N Finsterwalder

Lucille M Sharf

Laurence J Lynd

David Battat

Edward L Schlueter Jr

An endless flexible seamed belt formed by joining two ends of material from which the belt is fabricated each end of which has a plurality of mutually mating elements in a puzzle cut pattern which are in interlocking relationship to prevent separation of the ends and which form a seam when joined mechanically to enable the flexible belt to essentially function as an endless belt having a substantially uniform thickness, said seam having voids between mutually mating elements at least partially filled with a seam strength enhancing material which is chemically and physically compatible with the material from which the belt is fabricated and which substance applied as a strip or on a strip over the seam and is bound to said belt material, said bond having been formed by the application of heat and/or pressure to a strip of said compatible placed material on at least one side of the seam at least substantially covering the seam. The strip may include a substrate with a coating of the compatible material which is removed after the bond is formed.

Puzzle cut seamed belt with strength enhancing strip

An endless flexible seamed belt formed by joining two ends of the material from which the belt is fabricated, the belt having at least one overlapping butting joint to form the endless belt, each end of the belt material having top and bottom overlapping mating portions of the same length and wherein both the top and bottom overlapping portions are about one-half the thickness of the belt material, the mating portions being joined to provide a lapping joint and two butting joints and wherein rigid high strength fibers are present between mating portions of at least one joint, the seamed belt having been formed by the application of heat to said mating portions when the fibers are present in at least one joint.

Endless seamed belt with high strength

An endless flexible seamed belt formed by joining two ends of the material from which the belt is fabricated is provided, the belt having at least one overlapping, butting, interlocking joint to form the endless belt, each end of the at least one overlapping butting, joint, contains a pair of interlocking members having a male projection and a female receptacle geometrically oriented so that the female receptacle on the first end receives the male projection on the second end and the male projection on the first end is received by the female receptacle on the second end to form a joint between the first and second ends, at least one receptacle being formed within and having a substantial depth in a portion of the belt material at the belt ends, at least one projection and receptacle pair being sized and shaped to form at least one pair of mutually mating elements in a combination overlapping, butting and interlocking joint to form the endless belt.

Endless seamed belt

An endless flexible seamed belt with a mechanically invisible seam and substantially equivalent in performance to a seamless belt is formed by joining two ends of material from which the belt is fabricated each end of which has a plurality of mutually mating elements in a puzzle cut pattern which are in interlocking relationship in at least one plane and which when joined mechanically enable the flexible belt to essentially function as an endless belt having a substantially uniform thickness.

Endless puzzle cut seamed belt

An electrically conductive polyurethane elastomer obtained by the reaction of a polytetramethylene ether glycol having the formula HO[(CH.sub.2).sub.4 O].sub.x H where x is from 8 to 41 and from about 20 to about 95 parts by weight per 100 parts by weight of said glycol of at least one diisocyanate, a sufficient amount of chain extender and cross linking agents to provide a crosslinked elastomer and an amount of an asymmetric ionic quarternary ammonium salt having the formula: ##STR1## where R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are C.sub.n H.sub.2n+1 and 1.ltoreq.n.ltoreq.25 sufficient to provide a D.C. volume resistivity of from about 10.sup.7 to about 10.sup.11 ohm cm. In a preferred embodiment the asymmetric ionic quarternary ammonium salt is hexadecyl ethyl dimethyl ammonium ethyl sulfate.

Electrically conductive elastomer

An electrically conductive polyurethane elastomer obtained by the reaction of a polytetramethylene ether glycol having the formula HO[(CH.sub.2).sub.4 O].sub.x H where x is from 8 to 41 and from about 20 to about 95 parts by weight per 100 parts by weight of the glycol of at least one diisocyanate, a sufficient amount of cross linking agents and chain extenders to provide a crosslinked elastomer and an amount of an asymmetric ionic quarternary ammonium salt having the formula: ##STR1## where R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are C.sub.n H.sub.2n+1 and 1.ltoreq.n.ltoreq.25 sufficient to provide a resistivity of from about 10.sup.7 to about 10.sup.11 ohm cm. In a preferred embodiment the asymmetric ionic quarternary ammonium salt is (3-lauramidopropyl) trimethylammonium sulfate.

Electrically conductive polyurethane elastomer

An electrically conductive polyurethane elastomer obtained by the reaction of a polytetramethylene ether glycol having the formula HO[(CH.sub.2).sub.4 O].sub.x H where x is from 8 to 41 and from about 20 to about 95 parts by weight per 100 parts by weight of the glycol of at least one diisocyanate, a sufficient amount of cross linking agents and chain extenders to provide a crosslinked elastomer and an amount of an asymmetric ionic quarternary ammonium salt having the formula: ##STR1## Where R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are C.sub.n H.sub.2n+1 and 1.ltoreq.n.ltoreq.25 sufficient to provide a resistivity of from about 10.sup.7 to about 10.sup.11 ohm cm. In a preferred embodiment the asymmetric ionic quarternary ammonium salt is (3-lauramidopropyl) trimethylammonium sulfate.

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Rochester, NY, United States of America

Thomas C Parker