摘要:
An electrophotographic imaging member containing a supporting substrate having an electrically conductive surface comprising charge injecting material, a charge blocking layer including a water insoluble high molecular weight unmodified hydroxy methacrylate polymer and at least one photoconductive layer, the charge blocking layer having a surface resistivity greater than about 10.sup.10 ohm/sq. This imaging member may be employed in an electrostatographic imaging process.
摘要:
An electrophotographic imaging member including a supporting substrate, an electrically conductive layer including at least a partially crosslinked polymer having a backbone derived from an alkyl acrylamidoglycolate alkyl ether, a charge blocking layer including a polymer having a backbone also derived from an alkyl acrylamidoglycolate alkyl ether and at least one photoconductive layer. Preferably, the backbone derived from an alkyl acrylamidoglycolate alkyl ether is a copolymer of methyl acrylamidoglycolate methyl ether and a vinyl hydroxy ester or vinyl hydroxy amide. This imaging member may be prepared by a coating process and employed in an electrostatographic imaging process.
摘要:
An ionographic imaging member has a conductive layer overcoated by a charge accepting layer. Overcoating layers of acrylate, polycarbonate, polyester, polyurethane, acrylic homopolymer or copolymer and the like are provided. Blocking layers may be provided for preventing charge injection and reducing surface charge decay and bulk charge trapping. The charge accepting layer may be doped with a charge clocking material for preventing charge injection. The overcoating and blocking layers may be one and the same.
摘要:
A thick organic ambipolar layer on a photoresponsive device is simultaneously capable of charge generation and charge transport. In particular, the organic photoresponsive layer contains an electron transport material such as a fluorenylidene malonitrile derivative and a hole transport material such as a dihydroxy tetraphenyl benzadine containing polymer. These may be complexed to provide photoresponsivity, and/or a photoresponsive pigment or dye may also be included.
摘要:
A process is disclosed for forming at least one thin substantially uniform fluid coating comprising polymeric film forming material on a cylindrical mandrel, solidifying the fluid coating to form a uniform solid coating and separating the uniform solid coating from the mandrel. The process may comprise forming at least one thin substantially uniform fluid coating comprising polymeric film forming material around a cylindrical mandrel, the mandrel having a larger mass or lower thermal conductivity than the polymeric film forming material and a critical surface tension greater than the surface tension of the fluid coating, solidifying the fluid coating to form at least one thin substantially uniform solid coating comprising the polymeric film forming material around the cylindrical mandrel, heating both the uniform solid coating and the mandrel to a temperature at least above the apparent T.sub.g of the solid coating to expand the coating and the mandrel while maintaining contact between the coating and the mandrel, cooling the coating to below the apparent T.sub.g of the solid coating prior to substantial cooling of the mandrel, and cooling the mandrel whereby the mandrel contracts at a greater rate than the polymeric coating until separation occurs between the mandrel and the coating, and removing the coating from the mandrel.
摘要:
An imaging apparatus comprises an imaging member, a means for generating an electrostatic latent image on the imaging member, a means for developing the latent image, an intermediate transfer element having a charge relaxation time from about 3.times.10.sup.-1 seconds to about 2.times.10.sup.2 seconds to which the developed image can be transferred from the imaging member, and a means for transferring the developed image from the intermediate transfer element to a substrate. Also disclosed is an imaging process which comprises generating an electrostatic latent image on an imaging member, developing the latent image, transferring the developed image to an intermediate transfer element having a change relaxation time from about 3.times.10.sup.-1 seconds to about 2.times.10.sup.2 seconds, which enables the transfer with very high transfer efficiency of the developed image from the intermediate transfer element to substrate.
摘要:
An ionographic imaging member containing a conductive layer and a uniform and continuous dielectric imaging layer free of voids, the imaging layer having a dielectric constant of from about 1.5 to about 40 and a thickness of at least about 45 micrometers, the thickness divided by the dielectric constant having a value of from about 30 to about 60 micrometers. This member may be used in an ionographic imaging process.
摘要:
A method and apparatus for producing a multi-image or multi-color image utilize an intermediate transfer member that is a single layer of fluorocarbon elastomer. The method produces high quality images that do not suffer from image or color shifting or degradation. The single layer intermediate transfer member can contain different zones of electrical properties within the single layer.
摘要:
A seamless intermediate transfer member has a reinforcing member in an endless configuration, a filler material such as a polymer and electrical property regulating material to regulate the electrical properties such as surface and bulk resistivity, dielectric constant and charge dissipation. The seamless intermediate transfer member also has good mechanical properties. The reinforcing member can be prepared by any suitable method such as by weaving. Filler material and electrical regulating material can be applied on, around or embedded into the reinforcing member. The member can be employed in an electrostatographic imaging system with more than one toner imaging station. The member can pick up a separate image from each individual imaging station and transfer the combined image to a suitable substrate. The seamless intermediate transfer member is capable of dissipating charge between toner imaging stations, achieving good transfer efficiencies and has a non-stretch characteristic to attain good registration of a toner image.
摘要:
A copier/printer having a transfer station for transferring images from an imaging member to copy sheets includes the improvement of removing debris from the surfaces of copy sheets facing the imaging member before the copy sheets reach the transfer station. At least a pair of cooperating rolls are positioned to form a nip for driving the copy sheets therebetween toward the transfer station. The cooperating rolls include a drive roll and a dielectric roll with the dielectric roll being electrostatically charged by the drive roll and paper through contact and separation during the intercopy gaps between copy sheets in transit to the transfer station through contact with the copy sheets to electrostatically attract debris from the copy sheets.