Abstract: A pressure fixable single component electrophotographic toner or developer composition of a particle size of from 10-40 microns comprising a specialized low melt viscosity polyamide resin composition and a magnetic oxide component. Highly conductive carbon may be added to control the resistivity of the developer particles. The developer comprises from 65.50 percent of the magnetic oxide component and from 35-50 percent of the polyamide resinous component.

Abstract: A pressure fixable single component electrophotographic toner or developer composition comprising a low melt viscosity polyamide resin composition and a magnetic oxide component. Highly conductive carbon may be added to control the resistivity of the developer particles. The toner includes a magnetic oxide component in a range of from 50 to 65 percent by weight and a polyamide resinous component in a range of from 50 to 35 percent by weight.

Abstract: A process of preparing a lithographic printing master is presented utilizing electrophotographic principles. As a result of the high density, low background images which can be developed using the disclosed novel developer composition, a high quality lithographic master can be fabricated. The novel developer comprises a low melt viscosity polyamide resin composition, a magnetic oxide component and a conductive carbon pigment.

Abstract: An aqueous diazo coating composition is disclosed to be used in accordance with an alkaline vapor development system, containing a hydrolyzed resin together with a diazo light-sensitive compound, coupling agent and stabilizing materials. The aqueous diazo coating composition of the present invention provides a method of fabricating a light-sensitive diazo member for use in combination with a development system utilizing alkaline vapors which excludes the use of organic solvents.

Abstract: A method is disclosed for preparing an oleophilic drafting film and related light-sensitive reprographic member. An aqueous drafting composition is disclosed which is both compatible with hydrophobic material and diazo light-sensitive compositions which provides for an expedient method of fabricating drafting film. The drafting composition comprises an acrylic resin emulsion containing an aziridine hardening agent.

Abstract: An improved process for preparing a single component toner or developer composition is disclosed whereby toner fines are removed from the composition prior to the addition of conductive carbon followed by a reclassification step to remove excess carbon particles, i.e., those carbon particles not attached to the toner.

Abstract: A single component electrophotographic developer composition is disclosed comprising a low melt viscosity polyamide resin and a magnetic oxide component of such particle size as to greatly enhance the development of low background high density images. Highly conductive carbon may be added to control the resistivity of the developer particles.

Abstract: A process of preparing a lithographic printing master is presented utilizing electrophotographic principles. As a result of the high density, low background images which can be developed using the disclosed novel developer composition, a high quality lithographic master can be fabricated. The novel developer composition comprises a low melt viscosity polyamide resin, a magnetic oxide component and a conductive carbon pigment.

Abstract: A method of decalcomania in which a toner image pattern is formed on a transfer member which has been overcoated with an abhesive material. A polymeric sheet is interposed between the toner image and a cloth or other image receiving medium. The polymeric sheet assists in the permanent adherence of the toner imaging pattern to the cloth material or other medium when the composite is subjected to heat and pressure. The transfer member and method of its use are set forth. Another embodiment discloses the use of solvent to fix the image to a cloth material.

Abstract: A method of decalcomania in which a toner image pattern is formed on a transfer member which is overcoated with a polymeric material. The polymeric material assists in the permanent adherence of the toner imaging pattern to cloth material or other substrate under heat and pressure. The transfer member and method of its use are described.

Abstract: A cleaning composition is provided which includes a lower alcohol, ultrapure water, a surfactant, 3,5-dimethyl-1-hexyn-3-ol and ammonia solution. This cleaning solution is 100 percent volatile, water-clear, and contains no solids or colloidal matter, in addition to being contaminant- and particulate-free, it is found to leave no detectable residue even if not fully wiped off in a cleaning operation.

Abstract: A novel yellow electrostatographic colorant is disclosed. This colorant may be employed as an electrostatographic toner or developer material. Electrophotographic processes are disclosed employing this colorant. When employed as an electrophotographic developing material, this colorant is found to possess superior triboelectric properties among others which result in superior electrophotographic machine life than known yellow colorants.

Abstract: A method and ink composition for development of an electrostatic latent image with liquid developer is disclosed. The liquid developer has a viscosity suitable for convenient application to an imaged surface in the development of latent electrostatic images and has improved conductivity resulting from incorporating conductivity control agents in the form of quaternary ammonium compounds which are soluble in the carrier of the ink composition. The conductive ink composition comprises a coloring agent, optionally a binder and a dispersing agent, a carrier and a quaternary ammonium compound soluble in the liquid carrier.

Abstract: A xerographic apparatus having an improved liquid developer applicator is disclosed. The liquid developer applicator comprises a hollow, cylindrical, deformable fluid dispensing sleeve member having an outer elastomeric layer characterized by an outer surface having a relief pattern for carrying fluid developer provided from a reservoir to a photoconductor surface. The hollow, cylindrical, deformable fluid dispensing sleeve is also characterized by multiple inner layers which are provided to impart desirable properties and characteristics to the sleeve member. The fluid developer applicator is particularly useful in developing latent electrostatic images on photoconductor surfaces.

Abstract: An apparatus for reproducing a selected image by electrostatically attracting development fluid toward a receiving medium is disclosed. The apparatus includes a patterned gravure roll having a plurality of pockets movable into facing relationship with the receiving medium, the pockets being adapted to carry discrete quantities of development fluid characterized by a meniscus. The gravure roll further includes means defined by each of the pockets, defining a constant point of maximum meniscus reach, and lands for spacing each of the constant points a predetermined distance from the receiving medium when corresponding pockets are moved into facing relationship with the receiving medium.

Abstract: Method for cleaning liquid developer from upwardly moving support surfaces, such as reuable surfaces used for carrying latent electrostatic images. Surfaces are cleaned by a wiper blade and at least one scraper blade adapted to engage the support surface. The wiper blade acts upon the support surface upstream of the scraper blade.

Abstract: An article of manufacture for use in the fluid development of electrostatic images is disclosed. The article is characterized by a substantially cylindrical roll which has at least one volute groove partitioned into a plurality of cells for carrying a quantity of development fluid. The partitions prevent a doctor blade, applicable to the cylindrical roll from penetrating too deeply into the cells and thereby prevent substantial quantities of development fluid from being removed from the cells during doctoring.

Abstract: Rolls, belts and other biasable members having controlled resistivity are described. The resistivity of the elastomeric resilient polyurethane coating on biasable members is controlled by ionic additives incorporated in the polyurethane. Biasable members having at least one layer or coating of a hydrophilic elastomeric polyurethane containing resistivity altering compounds or agents have substantially reduced resistivity changes with changes in relative humidity. The utility of such biasable members is in the transfer of xerographic images from a photoconductor to a final support sheet where the member, for example, a bias transfer roll, electrically cooperates with a photoconductor to establish a directional force field therebetween.

Abstract: Rolls, belts and other biasable members having minimal sensitivity to relative humidity changes are described. Biasable members having at least one layer or coating of a hydrophobic elastomeric polyurethane change little in resistivity when changes in relative humidity occur. The utility of such biasable members is in the transfer of xerographic images from a photoconductor to a final support sheet where the member, for example, a bias transfer roll, electrically cooperates with a photoconductor to establish a directional force field therebetween.

Abstract: Liquid developer compositions for development of latent electrostatic images are disclosed. The electrostatic printing inks dry at ambient temperatures by penetration into paper leaving a continuous film having excellent rub resistance on the surface. The non-volatile, low viscosity inks comprise about 3-20% pigment and/or dye, about 5-35% of resinous particles having a size of 5 microns or less and having glass transition temperatures close to or below ambient temperature, said resinous particles being dispersed in the liquid carrier, 0-25% dispersing agent and about 25-90% non-volatile, high boiling organic liquid carrier and/or solvent.