Abstract: A small particle toner image is carried on a heat-softenable outer layer of a receiving sheet. The toner is embedded in the layer by application of an electric field to the toner while the layer has been softened by heating. Preferably, the toner is charged prior to the field-applying step to make it responsive to the field. Pressure may be applied to assist in the embedding process.

Abstract: A layered electrophotographic photoconductor is disclosed having a ground plane layer, a charge generating layer carried by the ground plane layer, and a charge transport layer carried by the charge generating layer. The polymeric binder material of the charge transport layer and the charge generation layer comprises an ordered copolyestercarbonate whose ester content is in the range of about 35 wt. % to about 70 wt. %, of which about 60 wt. % to about 70 wt. % is preferred, and of which about 70 wt. % is the most preferred. The charge generating molecule is a squarylium, and more specifically 2,4-bis-(4-dimethylamino-2-hydroxyphenyl) cyclobutene diylium-1,3-diolate (OHSQ), or an operative phthalocyanine compound, and preferably oxytitanium phthalocyanine. The charge transporting molecule is a hydrazone, and more specifically 4-diethylaminobenzaldehyde-1,1-diphenylhydrazone (DEH), or 4-diphenylaminobenzaldehyde-1,1-diphenylhydrazone (TPH).

Abstract: A novel electrophotographic photoreceptor for copiers or photoprinters is provided comprising a photoconducting layer provided on an electrically conductive support, wherein said photoconducting layer comprises a phthalocyanine pigment and at least one compound represented by the general formula (I) or (II): ##STR1## wherein Z represents a sulfur atom or oxygen atom; R.sup.1 and R.sup.2 may be the same or different and each represents a hydrogen atom, alkyl group, aryl group or aralkyl group; A represents an alkyl group, aryl group, aralkyl group or monovalent heterocyclic group; and B represents an alkylene group, arylene group, polymethylene group or aralkylene group.

Abstract: The present invention provides a polyolefinic resin-coated carrier having a rough surface and containing a core material in a quantity of 90 or more % by weight. Said resin-coated layer may contain fine particles having a charge-controlling function and/or electrically conductive fine particles as additives.

Abstract: A photosensitive member for electrophotography which comprises a conductive substrate and a photoconductive layer which is composed of an amorphous silicon layer and an amorphous silicon germanium layer containing a specific amount of hydrogen and/or halogen respectively, and being prepared by electron cyclotron resonance method respectively, which is useful for xerographic systems.

Abstract: An electrophotographic photoreceptor is disclosed, which comprises a conductive support and a photosensitive layer containing a compound represented by the following Formula I as acarrier-transporting substance: ##STR1## wherein Ar is a substituted or unsubstituted arylene group; R.sub.1 and R.sub.2 are each a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms or a substituted or unsubstituted aryl group; R.sub.3 and R.sub.4 are each a hydrogen atom, a hydroxyl group, a substituted or unsubstituted alkoxy group having 1 to 5 carbon atoms or a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms.The photoreceptor is excellent in charge characteristics, light sensitity and image formation and less causes fatigue deterioration after repeated use, thus having a superior durability.

Abstract: The present invention relates to a method for producing a photoreceptor for electrophotography. An aluminum base substrate is worked so that the R.sub.max is between 1.3 and 1.8 microns, with a filtered maximum waviness not exceeding 0.5 microns. The substrate is etched with an aqueous solution of alkali, and then etched with an aqueous solution of nitric acid to form an oxide thin film. A Se-As alloy is vacuum deposited thereon to form a light sensitive layer. This photoreceptor is flat and smooth so that the images obtained by electrophotography are substantially free from white point defects.

Abstract: According to a conventional one-time transfer type color electrophotographic method, since used is a color toner by which the maximum image density can first be obtained by overlapping of 4 to 6 layers, there are problems that the color tone of a mixed color image formed by piling up color-different toner images one after another varies and color irregularity occurs. On the other hand, according to the present invention, by using a color toner whereby the maximum image density of the toner can be attained with one toner layer, the aforementioned problems can be eliminated, and the reproduction of the mixed color image can be achieved by the one-transfer system. In addition, according to the present invention, it is possible to reproduce a clear full-color image with gradation.

Abstract: Disclosed is a seamless belt comprising a laminate of a conducting polymer layer and a host polymer layer. The process for preparing the seamless belt comprises electrochemically polymerizing onto an electrode a layer of a conductive polymeric material, followed by electrophoretically depositing a layer of a host polymer onto the layer of conductive polymeric material. Also disclosed is an imaging member comprising a substrate and a photogenerating layer, wherein the substrate comprises a laminate as described above. An imaging process which comprises incorporating into an ionographic imaging device an imaging member comprising a laminate of a conducting polymer layer and a host polymer layer as described above, generating a latent image on the imaging member by ion deposition, developing the latent image with a toner, transferring the developed image to a substrate, and permanently affixing the transferred image to the substrate is also disclosed.

Abstract: In forming an image by developing an electrostatic latent image with a grey toner, a mixture of a white toner and a black toner is used as the grey toner and the ratio (D) of the black toner to the entire toner, the developing voltage (DV) and the image density (ID) are set so that the requirement represented by the following formula is satisfied:ID=A.sub.2 .times.(1-e.sup.-K 2.sup.D).times.(1-e.sup.-K 3.sup.DV)wherein A.sub.2 is a number of from 0.5 to 2.5, K.sub.2 is a number of from 1 to 2, and K.sub.3 is a number of from 0.001 to 0.01.According to this process, a copy having a grey image area corresponding precisely to the image of an original is obtained.

Abstract: An electrostatic liquid developer having positive charging characteristics consisting essentially of:(A) a non-polar liquid having a Kauri-butanol value of less than 30, present in a major amount,(B) thermoplastic resin particles having an average by area particle size of less than 10 .mu.m,(C) a nonpolar liquid soluble ionic or zwitterionic charge director compound, and(D) a carbohydrate product of photosynthesis comprised of at least one saccharose present in (A) and/or dispersed in (B).The liquid developer is useful in copying, color proofing, digital color proofing, making lithographic printing plates, and resists.

Abstract: An electrophotographic photoreceptor is disclosed. The material comprises a conductive support and, provided thereon, an undercoat layer, a carrier generating layer and a carrier transport layer in this order, wherein said undercoat layer contains an N-alkoxylated polyamide copolymer or N-alkylated polyamide copolymer a unit represented by the following Formula 1:--NH--(CH.sub.2).sub.11 --CO-- Formula 1.

Abstract: New electrostatographic toners and developers are provided containing new charge-control agents comprising N-substituted pyridinium salts having the ##STR1## wherein R is a straight or branched chain alkyl group having from 1 to 24 carbon atoms, aralkyl in which the alkyl group has 1 to 20 carbon atoms and the aryl group has from 6 to 14 carbon atoms, R.sup.1 is hydrogen or a straight or branched chain alkyl or alkoxy group having from 1 to 24 carbon atoms, aralkyl or alkaryl in which the alkyl group has 1 to 20 carbon atoms and the aryl group has from 6 to 14 carbon atoms, unsubstituted aryl having from 6 to 14 carbon atoms or aryl having from 6 to 14 carbon atoms substituted with one or more nitro, alkoxy or halo groups and X is hydrogen, chlorine, bromine, fluorine or iodine.

Abstract: An imaging process which comprises (1) charging an imaging member in an imaging apparatus (2) creating on the member a latent image comprising areas of high, intermediate, and low potential; (3) developing the low areas of potential with a first developer comprising carrier and a first toner comprised of resin, pigment excluding black and an aluminum complex charge enhancing additive; (4) developing the high areas of potential with a second developer comprising carrier and a second toner comprised of resin, pigment, and a charge enhancing additive that enables a positively charged toner; (5) transferring the resulting developed image to a substrate; and (6) fixing the image thereto.

Abstract: An novel electrophotographic photoreceptor is provided comprising on an electrically conductive support a layer containing a charge-transporting compound and a charge-generating compound or a charge-transporting compound-containing layer and a charge-generating compound-containing layer, wherein said charge-generating compound is a trisazo compound represented by the general formula (1): ##STR1## wherein Ar.sup.1, Ar.sup.2, Ar.sup.3, Ar.sup.4, Ar.sup.5 and Ar.sup.6 each represents an arylene group, divalent condensed polycyclic aromatic group or divalent group derived from a monocyclic or condensed polycyclic heterocyclic aromatic group, each of which may have one or more substituents; C.sub.p respresents a coupler residual group; and n represents 1 or 2.

Abstract: An imaging method capable of producing high-resolution full color images on substrates such as flexible plastics sheets to form weatherable signs for exterior display, the method comprising:(a) providing a plurality of carrier sheets, each comprising a flexible base material having on one surface thereof a strippable resin layer;(b) imaging each carrier sheet by passage through an electrophotographic copying apparatus so that a toner image corresponding to a section of a desired image is deposited and fused on said strippable resin layer of each sheet;(c) adhesively bonding the side of each carrier sheet bearing said toner image to a first substrate, each carrier sheet being positioned such that the desired image is formed from the arrangement of the imaged carrier sheets;(d) stripping from the composite comprising the first substrate, toner image and resin layer, the flexible base material of each carrier sheet, and,(e) adhesively bonding a second substrate to said resin layer,wherein at least one of the fir

Abstract: Liquid toners for developing electrophotographic images contain dispersed toner particles which are based on a polymer with multiple characteristics. These particles comprise a thermoplastic resinous core with a T.sub.g below room temperature which is chemically anchored to an amphipathic copolymer steric stabilizer containing covalently attached groups of organic acid containing moieties having pKa's less than 4.5 which in turn are chemically bonded to metal soap containing compounds derived from organic acids having a pKa greater than 4.5. The toner particles so formed have advantageous properties of high charge/mass, and good charge and dispersion stability.

Abstract: Disclosed is an imaging member which comprises a conductive substrate and a photogenerating layer containing a compound selected from the group consisting of: ##STR1## and mixtures thereof, wherein Cp represents a coupler group, l, m, n, and o can each be 0, 1, 2, 3, or 4, the sum of l, m, n, and o is from 1 to 8, and M is selected from the group consisting of metals, metal oxides, metal halides, and metal hydroxy compounds.

Abstract: A process for preparing an improved positive-working electrostatic liquid developer comprising(A) dispersing at an elevated temperature in a vessel a thermoplastic resin and a nonpolar liquid having a Kauri-butanol value of less than 30, while maintaining the temperature in the vessel at a temperature sufficient to plasticize and liquify the resin and below that at which the nonpolar liquid degrades and the resin decomposes,(B) cooling the dispersion, either(1) without stirring to form a gel or solid mass, followed by shredding the gel or solid mass and grinding by means of particulate media;(2) with stirring to form a viscous mixture and grinding by means of particulate media; or(3) while grinding by means of particulate media to prevent the formation of a gel or solid mass;(C) separating the dispersion of toner particles having an average particle size of less than 30 .mu.

Abstract: An electrophotographic light-sensitive material is disclosed. The material comprises a support having formed thereon a photoconductive layer containing at least inorganic photoconductive particles and a binder resin, wherein the binder resin comprises at least one kind of a resin (A) and at least one kind of a resin (B) as defined in the specification.The electrophotographic light-sensitive material of the present invention has excellent electrostatic characteristics, moisture resistance and durability.