Abstract: Two different type toners are packaged in a cartridge having reversible parts. Reversal of the parts, as the two different toners are packaged, insures use of the correct toner in the correct one of two different electrophotographic reproduction devices.

Abstract: Flexible magnetic recording media having chromium dioxide magnetic particles dispersed in a polyester-polyurethane binder which is a reaction product of (A) a hydroxyl-terminated polyester which itself is a reaction product of a hydrolytically stable difunction alcohol (preferably 1,4-cyclohexanedimethanol), (B) a chain extender (preferably 1,4-butanediol), and (C) an aromatic diisocyanate [preferably 4,4'-methylenebis (1,4-phenylene) diisocyanate (MDI)]. The proportions of (A), (B) and (C) are selected to produce a polyester polyurethane having a hard segment content in the range of 37 to 40 percent by weight, of a molecular weight above 60,000, with the soft segment molecular weight (M.sub.n) being in the range of about 500 to 1500.

Abstract: The developer station of a xerographic reproduction device is purged of used developer mix, and the developer is refilled with new mix, without disturbing the developer's operative position within the reproduction device. New mix is shipped from the factory in a sealed bag, protected by a unique, throw-away, rigid, corrugated paperboard, outer package. This package is opened at the location of the reproduction device to be serviced, and the sealed bag is removed. A tear strip on the side of the package is then removed, leaving an elongated opening along one side of the empty package. The package's shape is such that it can be inserted into the developer, with the package's elongated opening aligned with the developer's mix-flow path. Operation of the developer now fills the package with used mix. The package is then discarded. The sealed bag is opened, and the new mix is placed in the developer.

Abstract: A coating head for use in strip-coating paper-card material with water-based, thixotropic magnetic recording ink, in order to produce disposable magnetic recording media which is intended for one write operation, followed by only a few read operations. The head sits on the card and contains a quantity of ink at ambient pressure and temperature. As the head and card move relative one another, the ink is subjected to a shear force, and a bottom surface layer of the ink is drawn into a trailing wall of the head, which wall contains a metering orifice. This orifice is of gradually increasing cross-section. That is, the orifice's entrance area is smaller than is its exit area. In this manner, the ink is subjected to a coating interface through which the ink experiences a reduction in hydrodynamic pressure, and a decrease in velocity, as the volume of the coating orifice increases. As a result, the viscosity of the ink increases as the ink progresses through the coating orifice.

Abstract: A canister for holding a stack of floppy disks, during manufacture of diskettes, or during storage and shipment of the disks. The canister is impervious to ultraviolet radiation, and comprises a base and a deep cup-shaped cover which latches to the base during storage and/or shipment, and which is removed after the canister's base is coupled to the proper input station of a diskette manufacturing machine. The canister is adapted to hold disks of a number of different types, but all of the same size. For example, disks which have been burnished, but not tested, and disks which have been both burnished and tested are different type disks. The canister base is different colored, in accordance with the type disk which is to be held by the base. Also, the base carries a unique bar code and a unique mechanical interlock wall which identify the type disk to be held by the base.

Abstract: A trivalent chromium electroplating process where the part to be plated is first pretreated with a sulphur compound, in order to accelerate the reduction of chromium ions to chromium metal during a subsequent plating step.

Abstract: A trivalent chromium electroplating solution containing trivalent chromium ions, a complexant, a buffer and an organic compound having a --C.dbd.S group or a --C--S-- group. The complexant is selected to give the chromium complex a stability constant, K.sub.1, in the range 10.sup.8 <K.sub.1 <10.sup.12 M.sup.-1.

Abstract: A bottom-dumping xerographic toner cartridge is protected by a storage and shipping package having strategically located zipper perforations, and a tuck-flap. One end of the package is removable by virtue of certain zipper perforations. Removal of this end, and operation of other zipper perforations, results in the tuck-flap being exposed for use in mounting the package on the reproduction device whose toner supply is to be replenished. The toner cartridge is then moved out of the package, into the reproduction device. The now-empty package remains supported in a position to catch the toner cartridge's traveling-fold seal, and any toner which may be transported out of the cartridge on the face of the seal.

Abstract: A two-cycle xerographic device having a multiple-roller magnetic brush developer which sequentially develops and then cleans the device's reusable photoconductor. The photoconductor provides one or more image panels for each revolution of the photoconductor. The photoconductor's interimage area, which separates the trailing edge of one panel from the leading edge of the same panel, or the leading edge of the next panel, is smaller (as measured in the direction of photoconductor movement) than the similar dimension spanned by the developer's spaced multiple rollers. As the panel's trailing edge leaves the first to-be-encountered roller, that roller's development electrode bias voltage is switched from a development to a cleaning bias. This switching function occurs sequentially, from one roller to the next, thus facilitating a small interimage area, and maximum photoconductor usage.

Abstract: A packaging system for 101/2-inch magnetic tape reels in which ten such reels are axially stacked and separated by stacking rings. This axially stacked assembly is then stretch-wrapped in a manner which produces substantial overlap of the stretch-wrap material. A support panel assembly, and two mounting plugs, capture the reels and the wrap material, to thereby seal the reels, and also support the reels with the edges thereof protected. An overpack box conforms to the shape of the support panel assembly, to further support and protect the reels, with the reel edges out of contact with the inner surface of the overpack box.

Abstract: Modulation of the edge erase lamps in a copier/duplicator/printer to record visual data in the normally unused margins of a copy/duplicate/print. Numerical information can be recorded by a controlled switching sequence of the lamps normally used for edge erasing on electrophotostatic type copiers (or duplicators or printers). Turning off an edge erase lamp causes a dark streak near the margin on the copy in line with the lamp so switched off. By selectively turning off and on combinations of a plurality of edge erase lamps, visual data such as numerals can be written in the margins while copies (or duplicates or prints) are being produced.

Abstract: An aggregate-type xerographic photoconductor wherein primary or secondary amines are used not only to solubilize the photoconductor's light sensitive organic dye, but also to act as a cross-linker for an epoxy binder of the bisphenol class. A combined CTL/CGL layer is described, having both hole transport and charge generating dye molecules. The resulting layer is useful either as single-layer, bimodal photoconductor, or as the CGL of a two-layer photoconductor.

Abstract: A hot roll, for use in a xerographic hot roll fuser, is made by coating a hollow aluminum cylinder with an elastomer, as by the use of an injection molding machine. After molding, the external surface of the elastomer cylinder is ground slightly to improve its concentricity. Thereafter, this ground external surface is subjected to the chemical influence of an acid. After a predetermined time period, the acid treatment is terminated and the roll is washed in water. The resulting hot roll, whose external surface has been chemically modified, possesses improved dry-release properties.

Abstract: A flexible magnetic recording disk is nonremovably enclosed in a rigid jacket. A wall of the rigid jacket includes a movable wall-piece which operates as a disk cleaning member. The disk is clamped to a spindle/collet drive assembly while the disk cleaning member is spaced from the adjacent surface of the disk. Only after clamping has been accomplished is the disk subjected to the friction force of the cleaning member.

Abstract: A bonding method which uses two solutions, one being anionic and the other being cationic, to lay down alternating layers of particles of accurate dimension onto members which are to be bonded. Thereafter, the layers are placed in contact, and the members are bonded together by diffusion bonding techniques.

Abstract: A moving web is coated on one side thereof by passing the web through an elongated pool of coating liquid. The pool is replenished by an elongated manifold having an internal, elongated, uniform-cross section, runner conduit which is supplied with liquid from at least one inlet port, located generally at its midpoint. Ink flows from the runner conduit, to the pool, by passing through a plurality of flow-restricting slots. The slots provide greater restriction to flow adjacent the inlet port, than at the two ends of the runner conduit.

Abstract: A trivalent chromium electroplating solution containing trivalent chromium ions, a complexant, a buffer and thiocyanate ions. The thiocyanate is of a molar concentration which is lower than the molar concentration of the chromium ions, and the chromium ion concentration being lower than 0.1 M. The stability constant, K.sub.1, of the solution's chromium complex is in the range 10.sup.8 <K.sub.1 <10.sup.12 M.sup.-1.

Abstract: A hot roll, for use in a xerographic, dry-release, hot roll fuser, is made by a method which adds iron-containing, magnetically permeable, particles to the elastomer as the elastomer is mixed. The particles may be pre-coated with a silane adhesive promoter. The mixed elastomer is then injected around a hollow, cylindrical aluminum core. As the elastomer sets up, in the mold, a magnetic field is applied such that the iron-containing particles migrate toward the metal core, and away from the exterior surface of the elastomer. This exterior surface will later be used to fuse xerographic toner. After the elastomer has set, its external surface is ground slightly, to produce a true circular-cylinder, but without exposing the underlying, more dense, layers of iron particle filler. As a result, the elastomer-to-core interface is mechanically strong, and yet the fusing property of the elastomer is not degraded by the presence of filler.

Abstract: The complete, two-color, multiple keybutton array of a keyboard is molded by a two-shot injection molding method which uses a rotating, double female die means selectively cooperating with two male dies. The finished keybutton array is ejected to a carrier which then cooperates with a gathering fixture, which fixture is then movably adjusted to place the keybuttons in position for assembly to the keyboard.