Abstract:
A method for joining a first sheet (10) to a second sheet (11) includes providing a first rigid plate (6); providing a gas absorbing layer on the first rigid plate; positioning the first sheet, the first sheet has at least a first layer (52) and a second layer (54), on the gas absorbing layer (8); positioning the second sheet, wherein the second sheet has at least a first layer and a second layer, on the gas absorbing layer; wherein an edge of the of the first sheet abuts an edge of the second sheet; placing a second rigid plate on top of the first and second sheet; wherein the second rigid plate is transparent; applying pressure to the first sheet edge and second sheet edge; and laser welding the edge of the first sheet to the edge of the second sheet with a first laser through the second rigid plate.
Abstract:
A method of removing charge from a charged sheet prior to stacking the charged sheet is disclosed. The method includes moving the charged sheet through a set of nipped rollers while a first roller has an AC voltage applied thereto so that a first side of the charged sheet is in contact with the first roller and has its charge substantially dissipated, whereby charge substantially remains on a second side of the charged sheet in contact with a second roller. The method further includes using at least one non-contact charge removal device to remove charge from the second side of the charged sheet, and stacking the discharged sheet.
Abstract:
The present invention is a process for making an intermediate transfer member. The process includes forming an endless belt by seaming two ends of a substrate material to form a seam. A smoothing layer is applied on top of the endless belt using a rotary cast process wherein said intermediate transfer member has a continuous seamless top surface. In a preferred embodiment the endless belt is formed by adhering at least two layers of a substrate to form a belt having an inner and outer seam.
Abstract:
The use of electrographic printing to prepare prints which have a desired tactile feel or raised information in a controlled manner by utilizing a developer having toner particle size larger than 50 microns volume average diameter and carrier particles larger than the toner particle size such that the volume average distribution overlap between the toner distribution curve and carrier particle distribution curve is less than 35% and the carrier and toner particles have a volume average diameter size differential equal to or greater than 5 microns or the ratio of carrier-to-toner volume average diameter exceeds 1.25.
Abstract:
An electrically conductive or semi-conductive polymeric material which includes a blend of:(i) a bis[oxydiethylenebis(polycaprolactone)yl]sulfoaryldicarboxylate or a bis[oxydiethylenebis(polycaprolactone)yl]sulfonamidosulfonylaryldicarboxylate, and(ii) a complex of a ferric halide and ethylene glycol or an oligoethylene glycol selected from di-, tri-, or tetraethylene glycol,to provide the material with its conductive properties.The material has a resistivity of from about 10.sup.6 to about 5.times.10.sup.11 ohm cm and can be used in the fabrication of biasable transfer members such as, for example, a biasable transfer roll to transfer electrostatographic toner images from a photoconductor to a final support material such as a sheet of paper wherein the member electrically cooperates with the photoconductor to establish a directional force field therebetween.
Abstract:
The invention provides rolls, belts and other biasable members having at least one layer or coating of an elastomeric resilient polyurethane. The polyurethane is formed by reacting:(a) a polyisocyanate prepolymer;and(b) a hardening mixture comprising:(i) a polyol and(ii) as a conductivity control agent an ammonium tetrahaloferrate salt of the formula ##STR1## The R substituents are defined in the specification.
Abstract:
A toner particle image made up of toner particles having a mean particle diameter of less than 7 microns and transfer-assisting particles strongly adhering to the surfaces of the toner particles having a mean particle diameter between about 0.01 microns and about 0.2 microns is electrostatically transferred to an intermediate. An intermediate has a base having a Youngs modulus of 10.sup.7 Newtons/m.sup.2 or less and a thin overcoat or skin which has a Youngs modulus of 5.times.10.sup.7 Newtons/m.sup.2 or more. The toner image is then electrostatically transferred from the intermediate image member to a receiving sheet. The surface of the intermediate image member receiving the toner image preferably has a roughness average equal to 20% of the mean diameter of the toner particles or less.
Abstract:
A method and apparatus for determining the charge-to-mass ratio of electroscopic toner particles of the type used in electrostatographic recording to develop electrostatic images. The apparatus uses a biased electrode for attracting toner particles thereto, and a microprocessor-based logic and control unit for sampling the mass of toner particles deposited on the electrode after the deposited toner particles have neutralized the electric field produced by the electrode bias. This toner mass information, together with certain toner constants and known parameters, is used by the logic and control unit to calculate the toner's charge-to-mass ratio. The output of the apparatus is useful for controlling process parameters (e.g. primary charging and exposure levels, development electrode bias, toner concentration) which affect image quality.