Abstract: An apparatus and method for managing a set of printer memory requirements, including a random access memory for storing data in a set of variably sized compartments and a processor for determining a source of a predetermined number of print input jobs. A controller, responsive to the size determinations by the processor, generates a set of optimized memory compartment reallocation recommendations according to the source of the predetermined number of print input jobs.

Abstract: A technique for downloading or activating or deactivating selected machine features from a remote central station that is connected to the remote machine by a communication channel. Also, the invention includes identifying features to be downloaded and then activated at a given site and communicating the data relative to the identified features to the remote machine.

Abstract: A technique for providing screen dialog related to communication between predetermined control boards of an image processing machine and in particular to the method of analyzing the communication between the control boards by providing a visual indication of the control boards on an interface display, initiating transmission between the control boards at the interface display, displaying data in a window on the interface display to validate communication between selected boards, and scrolling the data within the window to display data among other boards, the data including board identification and validation information.

Abstract: This invention is directed to a negatively charged toner compositions comprised of resin particles and pigment particles, and from about 0.1 percent by weight to about 20 percent by weight, of an aryl sulfone, or aryl alkyl sulfonamide negative charge enhancing additive of the following formulas.R.sub.1 --SO.sub.2 --R.sub.2 IR.sub.3 --SO.sub.2 --NH--R.sub.4 IIwherein R.sub.1 is an alkyl group containing from about 6 carbon atoms to about 22 carbon atoms, or an aryl group, R.sub.2 is an aryl group containing from about 6 carbon atoms to about 18 carbon atoms, R.sub.3 is an aryl group, and R.sub.4 is an alkyl group independent from R.sub.1, containing from about 6 carbon atoms to about 22 carbon atoms, or an aryl group.

Abstract: This invention is generally directed to dry negatively charged toner compositions comprised of resin particles, pigment particles and a polyanhydride charge enhancing composition of the formula: ##STR1## wherein R is an alkyl group containing from about 6 carbon atoms to about 22 carbon atoms, and n is a number ranging from about 5 to about 2,000.

Abstract: This invention is generally directed to toner compositions, and developer compositions containing same, the toner compositions being comprised of resin particles, and pigment particles, wherein one of the pigments is comprised of an alkaline earth salt of 4-amino-2-chlorotoluene-5-sulfonic acid coupled to 3-hydroxy-2-naphthalene carboxylic acid of the formula ##STR1## which compositions are useful in electrostatographic color imaging systems. In the above formula, X is the cation calcium, barium or strontium.

Abstract: This invention relates to a process for the preparation of dry positively charged toner particles, and more spceifically a polymerization process for preparing dry positively charged toner resins, containing a charge control agent, or additive which has a dual function, as a wetting agent in the polymerization process, and as a charge control agent for the toner resin, whereby the charge control agent is firmly bonded (attached) to the toner resin and is uniformly dispersed in the resin, or emulsion polymerization of a monomer material, a pigment and a charge control additive. As a result of the polymerization there is formed a dry positively charged toner resin which has attached thereto the charge control agent.

Abstract: Electrostatographic developer mixtures comprising finely-divided toner particles electrostatically clinging to the surface of carrier particles comprising a core having an outer coating thereon comprising a polyblend of a first polymer possessing negative triboelectric charging characteristics with respect to toner particles and a second polymer which possesses strong adhesive properties with respect to said core. The coated carrier particles have negative triboelectric charging properties and are particularly useful in development of negatively charged photoreceptors. Imaging processes are also disclosed.

Abstract: An electrostatographic developer mixture comprising finely-divided positively charging toner particles electrostatically clinging to negatively charging carrier particles. The toner particles comprise a resin, a colorant, and a charge inducing material selected from (1) a long chain hydrazinium compound and (2) an alkyl pyridinium compound. The carrier particles comprise core particles having a coating of fused thermoplastic resin particles wherein the carrier particles are prepared by dry-mixing the core particles with thermoplastic resin particles until the resin particles adhere to the core particles. The mixture of core and resin particles are heated to between 320.degree. F. and 650.degree. F. for between 20 and 120 minutes so that the resin particles melt and fuse to the core particles. The developer mixture is employed to develop electrostatic latent images.

Abstract: A finely-divided toner composition comprising a thermoplastic vinyl resin and a surface active additive selected from the group consisting of fluorinated surfactants. The toner composition possesses controlled triboelectric charging properties while its other bulk properties remain unaffected. Developer compositions and electrostatographic imaging processes are also disclosed.

Abstract: A finely-divided toner composition comprising a thermoplastic vinyl resin and a surface active additive selected from the group consisting of fluorinated surfactants. The toner composition possesses controlled triboelectric charging properties while its other bulk properties remain unaffected. Developer compositions and electrostatographic imaging processes are also disclosed.