Xerox Corporation

Robert C Yu

Satchidanand Mishra

Richard L Post

Anthony M Horgan

Donald C VonHoene

Edward F Grabowski

William W Limburg

Geoffrey M Foley

Kathleen M Carmichael

Bing R Hsieh

William G Herbert

Donald P Sullivan

Neil S Patterson

John F Yanus

Huoy-Jen Yuh

Donald C Von Hoene

Damodar M Pai

Joseph C Mammino

John W Spiewak

Yonn K Rasmussen

Sharon E Normandin

Timothy J Fuller

Markus Rudolf Silvestri

Dale S Renfer

Michael Stephen Roetker

John S Chambers

Cindy C Chen

Constance J Thornton

Abraham Cherian

John J Darcy

John A Bergfjord, Sr

Francis J Wieloch

John R Lambie

Deborah J Nichol-Landry

Santokh Singh Badesha

Beng S Ong

David H Pan

Kenny-Tuan Dinh

Nero R Lindblad

Youti Kuo

Richard L Schank

Ronald F Ziolo

Dennis A Abramsohn

David W Martin

Ralph A Shoemaker

Dennis J Prosser

Steven J Grammatica

Susan M VanDusen

Harold F Hammond

Leon A Teuscher

Raymond K Crandall

Anita P Lynch

Brian E Springett

Karl V Thomsen

Edouard E Langlois

Emery G Tokoli

Robert Allen Koontz

Susan Robinette

Eric J Schneider

Barbara D Ceglinski

Charles C Robinson

Andrea G Holland

Houy Jen Yuh

Satchidanand Mishia

Yuh Tong

Alfred T LaFrance

Geoff Foley

Jack Yanus

Leonard F Quinn

Vincent E Hamilton

Ronald P Premo

An imaging member having a charge transport layer with multiple regions or layers is provided. The charge transport layer includes at least two charge transport layers coated from solutions of different components and concentrations, wherein the second (top) transport layer comprises a lower concentration of different charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the second (top) charge transport layer is a high mobility hole transport compound. The charge transport compound in each layer is dissolved or molecularly dispersed in an electrically inactive film forming polymer to form a solid solution. In such a construction, the resulting dual charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.

Imaging member having a dual charge transport layer

An imaging member having a charge transport layer is provided. The charge transport layer includes a plurality of charge transport layers coated from solutions of similar or different compositions or concentrations, wherein the upper or additional transport layer(s) comprise a lower concentration of charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the first (bottom) charge transport layer may either be the same or different from that included in the additional charge transport layers. The charge transport compound in one or more of the layers is dissolved or molecularly dispersed in an electrically inactive polymer material to form a solid solution. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.

Imaging members

An imaging member having a charge transport layer with multiple regions is provided. The charge transport layer includes a plurality of charge transport layers coated from solutions of similar or different compositions or concentrations, wherein at least the top or uppermost transport layer comprises a lower concentration of charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the first (bottom) charge transport layer may either be of the same or different compounds from that included in the top or additional charge transport layer(s). The charge transport compound present in each layer may be dissolved or molecularly dispersed in an electrically inactive polymer material to form a solid solution. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.

A method of treating an electrostatographic imaging member web is applied to a web that includes a support substrate and at least one imaging layer formed over the support substrate. The electrostatographic imaging member web can optionally include no anti-curl backing layer. The web is bent into an arcuate shape and heated to a temperature above the glass transition temperature of the imaging layer. The imaging layer is then cooled while in the arcuate shape to a temperature below the glass transition temperature, forming a substantially stress-free imaging layer when conforming to the arcuate shape. The electrostatographic imaging members can be electrographic and electrophotographic imaging members. The treated electrostatographic imaging member webs can be formed into seamed electrostatographic imaging member belts such as ionographic imaging member belts and photoreceptor belts.

Method of treating electrostatographic imaging web and method of making

A photoconductive imaging member comprised of a supporting substrate, a layer (1) thereover, a photogenerating layer and a charge transport layer, and wherein said layer (1) is generated from a mixture of a polyhydroxyalkylacrylate, and an amino alkyltrialkoxysilane.

Photoconductive imaging members

An electrostatographic imaging member including

Electrostatographic imaging member having an improved imaging layer

A system for increasing the life of flexible photoreceptor belt in a copier/printer includes tensioning and de-tensioning the photoreceptor belt. The photoreceptor belt is de-tensioned at the end of daily use, on weekends, and on non working days in order to reduce belt dimensional elongation due to creep which thereby suppresses the development of charge transport layer cracking in the photoreceptor belt and increases belt service life of the photoreceptor by a factor of about 2.times..

Flexible photoreceptor belt detensioning for charge transport layer

A process for treating a seamed flexible electrostatographic imaging belt including providing an imaging belt having two parallel edges, the belt comprising at least one layer comprising a thermoplastic polymer matrix and a seam extending from one edge of the belt to the other, the seam having an imaginary centerline, providing an elongated support member having at arcuate supporting surface and mass, the arcuate surface having at least a substantially semicircular cross section having a radius of curvature of between about 9.5 millimeters and about 50 millimeters, supporting the seam on the arcuate surface with the region of the belt adjacent each side of the seam conforming to the arcuate supporting surface of the support member, precisely traversing the length of the seam from one edge of the belt to the other with thermal energy radiation having a narrow Gaussian wavelength distribution of between about 10.4 micrometers and about 11.2 micrometers emitted from a carbon dioxide laser, the thermal energy radiation forming a spot straddling the seam during traverse, the spot having a width of between about 3 millimeters and about 25 millimeters measured in a direction perpendicular to the imaginary centerline of the seam, and rapidly quenching the seam by thermal conduction of heat from the seam to the mass of the support member to a temperature below the glass transition temperature of the polymer matrix while the region of the belt adjacent each side of the seam conforms to the arcuate supporting surface of the support member.

Defocused laser seam stress release in flexible electrostatographic

An imaging member including: (a) a substrate layer; (b) an imaging layer; and (c) an abrasion resistant layer selected from the group consisting of an overcoating layer and an anti-curl layer, wherein the abrasion resistant layer includes a branched polycarbonate.

Imaging member containing branched polycarbonate

A process for treating a seamed flexible electrostatographic imaging belt including providing an imaging belt including at least one layer including a thermoplastic polymer matrix and a seam extending from one edge of the belt to the other, providing an elongated support member having a arcuate supporting surface and mass, the arcuate surface having at least a substantially semicircular cross section having a radius of curvature of between about 9.5 millimeters and about 50 millimeters, supporting the seam on the arcuate surface with the region of the belt adjacent each side of the seam conforming to the arcuate supporting surface of the support member with a wrap angle at least sufficiently enough to provide arcuate support for the seam area, traversing the seam from one edge of the belt to the other with infrared rays from a tungsten halogen quartz bulb focused with a reflector having a hemiellipsoid shape to form a heated substantially circular spot straddling the seam during traverse, the spot having a diameter of between about 3 millimeters and about 25 millimeters, without exceeding the breadth of supported arcuate seam area, to substantially instantaneously heat the thermoplastic polymer matrix in the seam and the region of the belt adjacent each side of the seam directly under the heating spot to at least the glass transition temperature of the polymer matrix without significantly heating the support member, and rapidly quenching the seam by thermal conduction of heat from the seam to the mass of the support member to a temperature below the glass transition temperature of the polymer matrix while the region of the belt adjacent each side of the seam conforms to the arcuate supporting surface of the support member. Apparatus for carrying out this process is also disclosed.

Seam stress release in flexible electrostatographic imaging belts

A process for treating a seamed flexible electrostatographic imaging belt including providing an imaging belt including at least one imaging layer including a thermoplastic polymer matrix and a seam extending from one edge of the belt to the other, the seam having a region on the belt adjacent each side of the seam and also having an exposed surface on each side of the belt, supporting the belt with at least one vacuum holding device spaced from the seam while maintaining the seam and region of the belt adjacent each side of the seam in an arcuate shape having at least a substantially semicircular cross section having a radius of curvature of between about 9.5 millimeters and about 50 millimeters, heating the thermoplastic polymer matrix of the imaging layer in the seam and the region of the belt adjacent each side of the seam to at least the glass transition temperature (Tg) of the thermoplastic polymer matrix without significantly heating the support member, and contacting the exposed surface of the seam and regions on each side of the belt with a gas to rapidly cool the seam and regions on each side of the belt to a temperature below the glass transition temperature of the polymer matrix while maintaining the arcuate shape of the region of the belt adjacent each side of the seam. Apparatus for carrying out this process is also disclosed.

Rapid electrostatographic belt treatment system

An electrophotographic printing machine that has a photoconductive belt with a skewed seam thereon. The position of the skewed seam is detected by a pair of seam detection devices. The seam detection devices are spaced from one another and adapted to transmit a pair of signals with the signals having a time interval therebetween. These signals are inputted to a detection circuit and, if the time interval between signals is within a preselected tolerance, the detection circuit generates a seam indication signal. In this way, scratches on the photoconductive surface may be discriminated from the seam.

Photoconductor belt seam detection

A flexible electrostatographic imaging belt having two parallel sides and a non imaging seam region extending substantially from one of the sides to the other side, the non-imaging seam region having a leading edge, a trailing edge and a seam within the non imaging seam region, the leading and trailing edges being perpendicular to the two parallel sides of the imaging belt, the belt comprising a substrate layer, a reflective electrically conductive layer, at least one imaging layer, an imaging region extending around the belt from adjacent the leading edge of the seam region to adjacent the trailing edge, the imaging region adapted to reflect monochromatic infrared radiation and a permanent localized solid attribute at a predetermined location in the non imaging seam region, the attribute adapted to reduce by at least about 50 percent direct reflection by the seam itself of a beam of monochromatic infrared radiation originally directed at the attribute. This belt is used in imaging apparatus and imaging processes.

Seamed flexible electrostatographic imaging belt having a permanent

A process for fabricating an electrostatographic cleaning member including forming a liquid mixture of a non-carbonaceous organic antioxidant uniformly distributed in a liquid prepolymer polyol, or in a liquid di-isocyanate, or in both the prepolymer polyol and the di-isocyanate, combining and reacting the prepolymer polyol with the di-isocyanate to form a cleaning member including a crosslinked thermoset polyurethane elastomer matrix reaction product in which the antioxidant is uniformly distributed.

Electrostatographic cleaning apparatus

An electrostatographic imaging member including an anti-curl layer, a supporting substrate having an electrically conductive layer, at least one imaging layer, an optional ground strip layer and an optional overcoating layer, the anti-curl layer including a film forming polymer binder selected from the group consisting of

Mechanically robust anti-curl layer

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Webster, NY, United States of America

Robert C Yu