Abstract: An ink jet ink composition comprising a vehicle; a colorant; and a polymer having a molecular weight between 200,000 and 40 million g/mol.

Abstract: An ink receptive element for transferring images to fabric at a temperature between 170.degree. C. and 100.degree. C. A method of transfer is also disclosed.

Abstract: An ink jet printing method is described. It comprising the steps of: providing an ink jet printer that is responsive to digital data signals; loading the printer with ink receptive substrates; loading the printer with an aqueous ink jet ink, said ink A) comprising a pigment, an aqueous carrier and potassium N-methyl-N-oleoyl taurate; and B) having a surface tension of 20 to 60 dynes/cm at 25.degree. C., a viscosity of 1 to 10 centipoise at 25.degree. C. and a particle size of less than 1.0 .mu.m; and printing on the ink receptive substrate in response to the digital data signals.

Abstract: A pigmented ink jet ink comprising an aqueous carrier medium, a pigment, and aluminum stabilized colloidal silica particles of average particle size from 0.005 .mu.m to 0.050 .mu.m.

Abstract: A toner image receiver sheet for electrophotography comprises a substantially opaque substrate of microporous material and, disposed on at least one surface of the substrate, a substantially water-impervious toner image-receiving layer comprising a thermoplastic organic polymer. The microporous material of the substrate comprises a matrix of substantially water-insoluble organic polymer in which is distributed finely divided substantially water-insoluble filler particles that are at least 50 weight percent siliceous particles and constitute about 40 to 90 weight percent of the microporous material. A network of interconnecting pores communicating throughout the microporous material constitutes about 35 to 95 volume percent of the microporous material. On at least one surface of the substrate is disposed a substantially water-impervious toner image-receiving layer comprising a thermoplastic organic polymer.

Abstract: A process and system for inhibiting toner offset in a electrostatographic apparatus of the kind wherein toner images are contact fused to a copy sheet. Drops of offset inhibiting liquid are discretely directed to predetermined locations on the contacting surface of the apparatus fuser member. For example, a drop on demand, piezoelectric drop generator can controllably jet drops of silicone oil to form desired offset inhibiting patterns in accord with apparatus control signals, indicative of particular copy sheet and image requirements.

Abstract: The photoconductive element of the invention comprises an electrically conductive support and a photoconductive material capable of generating positive charge carriers when exposed to actinic radiation, the element having, situated between the support and the photoconductive material, an electrical barrier layer that restrains the injection of positive charge carriers from the conductive support, the barrier layer comprising a polyester ionomer. The method of the invention comprises coating on an electrically conductive support an aqueous dispersion of a polyester ionomer as a barrier layer, coating a charge generation layer over the barrier layer, and coating a p-type charge transport layer over the charge generation layer.

Abstract: A system for assisting the transfer of a toner image formed by electrostatographic apparatus and process to a copy sheet. The transfer assistance system and process utilize drop generators to form a release liquid pattern for joining with such toner image and a supply mechanism delivers release material, e.g., heat wax material, to the drop generators. In a preferred mode release liquid is applied, in a patterns customized to toner patterns, to an intermediate transfer member.

Abstract: A bleachable composition, including an acid photogenerator and a near-infrared radiation-absorbing dye or pigment, is utilized in a method of migration imaging to prevent unwanted absorptions. This composition can be incorporated either in the thermoplastic imaging surface layer of the imaging element, in the marking particles applied to the element, or both. Alternatively, the components of the bleachable composition can be separated with one in the thermoplastic imaging surface layer and the other in the marking particles. After the imaging element is marked and exposed with near-infrared radiation, the bleachable composition caused exposed portions of the imaging element to be bleached. If further bleaching is needed, the element can subsequently be exposed with near-ultraviolet radiation. A migration imaging method, which does not employ the bleachable composition of the present invention, wherein marking particles are magnetically attracted to the imaging element, is also provided.

Abstract: An ink composition for utilization in ink-jet printing is provided which comprises an aqueous medium, a metallized azo red pigment and, as a sequestering agent, an alkali metal, an alkaline earth metal or an ammonium salt of a linear aliphatic substituted glycine such as a salt of ethylene diamine tetraacetic acid or nitrilo triacetic acid. The composition has been found to remain stable for extended periods of time.

Abstract: An opaque image-recording element for an ink-jet printer which comprises an opaque substrate having on at least one surface thereof a lower layer of a solvent-absorbing microporous material which comprises:(a) a matrix of substantially water-insoluble thermoplastic organic polymer;(b) finely divided substantially water-insoluble filler particles, of which at least 50 percent by weight are siliceous particles, the filler particles being distributed throughout the matrix and constituting from 40 to 90 percent by weight of the microporous material;(c) a network of interconnecting pores communicating substantially throughout the microporous material, the pores constituting from 35 to 95 percent by volume of the microporous material, andan upper image-forming layer of porous, pseudo-boehmite having an average pore radius of from 10 to 80 .ANG..

Abstract: A bleachable composition, including an acid photogenerator and a near-infrared radiation-absorbing dye or pigment, is utilized in a method of migration imaging to prevent unwanted absorptions. This composition can be incorporated either in the thermoplastic imaging surface layer of the imaging element, in the marking particles applied to the element, or both. Alternatively, the components of the bleachable composition can be separated with one in the thermoplastic imaging surface layer and the other in the marking particles. After the imaging element is marked and exposed with near-infrared radiation, the bleachable composition causes exposed portions of the imaging element to be bleached. If further bleaching is needed, the element can subsequently be exposed with near-ultraviolet radiation.

Abstract: Electrophotographic elements including near-infrared radiation absorbing sensitizers and selected near-infrared radiation absorbing additives exhibit a reduced tendency toward the formation of laser interference patterns. These elements can be utilized in electrophotographic imaging processes including the steps of electrostatically charging the element, imagewise exposing the charged element to near-infrared radiation to form an electrostatic latent image, developing the electrostatic latent image by applying charged toner particles to the element to produce a toned image, and transferring the toned image to a suitable receiver.

Abstract: A method is provided for non-electrostatically transferring dry toner particles which comprise a toner binder and have a particle size of less than 8 micrometers from the surface of an element to a receiver. The element comprises a conductive substrate and a surface layer which contains an electrically insulating polymeric binder resin matrix which comprises a crystalline side chain polyester or a block copolyester or copolycarbonate having a crystalline side chain polyester block and the receiver comprises a substrate having a coating of a thermoplastic addition polymer on a surface of the substrate in which the Tg of the polymer is less than approximately 10.degree. C. above the Tg of the toner binder. The method involves contacting the toner particles with the receiver which is heated to a temperature such that the temperature of the thermoplastic polymer coating on the receiver substrate during transfer is at least approximately 15.degree. C.

Abstract: A method is provided for non-electrostatically transferring dry toner particles which comprise a toner binder and have a particle size of less than 8 micrometers from the surface of an element to a receiver. The element comprises a conductive substrate and a surface layer which contains an electrically insulating polymeric binder resin matrix which comprises a block copolyester or copolycarbonate having a fluorinated polyether block and the receiver comprises a substrate having a coating of a thermoplastic addition polymer on a surface of the substrate in which the Tg of the polymer is less than approximately 10.degree. C. above the Tg of the toner binder. The method involves contacting the toner particles with the receiver which is heated to a temperature such that the temperature of the thermoplastic polymer coating on the receiver substrate during transfer is at least approximately 15.degree. C.

Abstract: The present invention relates to a multi-active electrophotographic element having a charge-transport layer containing stable free radical compounds as the charge-transport material. A process of forming images with this element is also disclosed.

Abstract: A method of forming a toner image on a receiving sheet includes a step of either transferring or fixing a toner image to the receiving sheet, in which the receiving sheet is heated to a temperature of at least 100.degree. C. To allow steam to escape from the receiving sheet, a gas impermeable layer on the side of the sheet opposite the toner image is made permeable by application of small, closely spaced holes in the layer. The method is particularly usable with a receiving sheet having a heat-softenable layer which is heated beyond its softening point to facilitate transfer of images made up of very small toner particles. The holes are preferably mechanically punched in a curl-preventing layer on the opposite side of the sheet.

Abstract: The present invention relates to a photoelectrographic element having a conductive layer in electrical contact with an acid photogenerating layer which is free of photopolymerizable materials and contains an electrically insulating binder and acid photogenerator. A dye which absorbs near-infrared radiation is included in the photoelectrographic element so that the element, when used in electrostatic copying, can be exposed with near-infrared radiation. A method for forming images with this element is also disclosed.

Abstract: The present invention relates to a photoelectrographic element having a conductive layer in electrical contact with an acid photogenerating layer which is free of photopolymerizable materials and contains an electrically insulating binder and acid photogenerator. A pigment which absorbs near-infrared radiation is included in the photoelectrographic element so that the element, when used in electrostatic copying, can be exposed with near-infrared radiation. A method for forming images with this element is also disclosed.

Abstract: The present invention relates to a photoelectrographic element having a conductive layer in electrical contact with an acid photogenerating layer which is free of photopolymerizable materials and contains an electrically insulating binder and an onium acid photogenerator. A dye or pigment which undergoes a color density or hue shift upon exposure with radiation is included in the photoelectrographic element. A method for forming images with this element is also disclosed.