Abstract: A laser printer having a gallium arsenide laser and a photoconductor sensitive to the output wave energy of such a laser, the photoconductor having ordered layering of (1) a polycarbonate polymer adhesive layer coated onto an electrically conductive substrate, (2) a first CDB or TMB containing charge generating layer, (3) a second OHSQ containing charge generating layer, and (4) a top-located charge transport layer.

Abstract: A wide traveling web is coated on one side thereof by passing the web through a pool of non-Newtonian coating liquid. The pool is replenished by a conduit manifold having at least one inlet port and a plurality of outlet ports. The outlet ports communicate directly with the pool. The inlet port and the outlet ports are interconnected by a plurality of branching conduits. All branching conduits subject the coating liquid to substantially identical flow rheology in that the branching conduits are of substantially equal length and substantially equal fluid shear characteristic.

Abstract: A flash system for fusing or fixing thermoplastic resin such as toner onto an image support sheet includes a pair of flash fusing assemblies disposed in side-by-side relationship. Each assembly includes a reflector with a flash lamp positioned within said reflector. The flash lamps are coupled in parallel to a common energy charging source. The flash lamps are triggered alternatively so that each section of the support sheet is fused by a different lamp. In an alternate embodiment, a single lamp is moved at one half the speed of the support sheet. The lamp is triggered sequentially to fuse the entire sheet.

Abstract: An ink jet printing ink is first formulated in concentrated form, and in this form it is subjected to stressful operating conditions such as an elevated temperature. This stress causes particle formation. After filtration to remove these particles, the final ink formulation is prepared, including for the first time ingredients which inhibit particle formation.

Abstract: Fusing of a toned sheet of copy paper is accomplished by a fusing nip formed by a resilient hot roll and a rigid backup roll. The sheet is introduced to the fusing nip in a unique manner such that the sheet's initial contact to the hot roll fuser is substantially only a point on the sheet's leading edge. This is accomplished by orientation means operable to bow the sheet's leading edge, and/or to produce skew between the fusing nip and the sheet's leading edge.

Abstract: Apparatus shown for feeding documents of selected width singly from a stack in alignment without buckling. Guides are provided at either side of a bin for holding a stack of documents. One guide is fixed and the other adjustable in order that the bin may hold stacks having documents of selected widths. A shingler (combing wheel) shingles the documents forward to a separator/restraint station, which feeds the documents singly. In order to properly align the sheets for separation, the adjustable guide is connected by an adjustment device to the shingler wheel. The adjustment device (e.g., cable and pulley) is arranged to move the shingler wheel half the distance the adjustable guide is moved. This keeps the shingler wheel centered with respect to the documents. The separator/restraint station is positioned so as to always be to the side of the shingler wheel towards the fixed guide to abut each separated sheet against an alignment edge thereof for precise alignment thereof.

Abstract: A chromium electroplating solution in which the source of chromium comprises an equilibrated aqueous solution of chromium (III) - thiocyanate complexes having supporting electrolyte consisting essentially of potassium sulphate or, preferably, a mixture of potassium and sodium sulphates. The solution is employed as the catholyte in a plating bath in which the catholyte and anolyte are separated by a cation exchange membrane. This all-sulphate bath permits the use of lead anodes, has high efficiency and a good plating range.

Abstract: A process for electrophotographic reproduction, and a layered electrophotographic plate having a conventional charge generation layer and a p-type hydrazone containing charge transport layer, in which the surface of the charge transport layer is selectively discharged by actinic radiation as a result of the migration through the transport layer of charges generated in the charge generation layer as a result of the actinic radiation and injected into the transport layer, the hydrazone having the composition p-diethylaminobenzaldehyde-(diphenylhydrazone), i.e., ##STR1## and the charge transport layer including DEASP or Acetosol Yellow in an amount not exceeding 13 wt. % of the hydrazone.

Abstract: A wide moving web is coated on one side thereof by passing the web through an elongated pool of non-Newtonian coating liquid. The pool is contained at its opposite ends by walls or dams, these dams being spaced a distance less than the width of the web, such that the side edges of the web are not coated. The dams are constructed and arranged such that the coating liquid approaches the adjacent web edge in an amount which increases as the depth of the pool of coating liquid increases. Monitoring means view the opposite side edges of the coated web. When the coating begins to retreat toward the center of the web, pool replenishment is increased. When the coating begins to approach the edges of the web, pool replenishment is decreased. The sensor whose coating is closest to the web edge is in control of the pump. If the coating reaches an edge of the web, the coating apparatus is stopped.

Abstract: A xerographic hot roll fuser whose hot roll's soft, elastomeric outer surface is formed of a mixture of 70 parts polymethylvinylsiloxane where the vinyl groups are terminating groups, and 30 parts of a blended polymer consisting of the polymethylvinylsiloxane and polymethyl-H-siloxane in which the hydride function is greater than two.

Abstract: Method and apparatus for coating a moving web and for independently controlling the coating's width, thickness and uniformity of thickness along the length of the web. A back-up roller supports the moving web on a portion of the roller's periphery. A stationary and pliant smoothing film is positioned adjacent the exposed surface of the web which is supported by the back-up roller. A coating liquid is metered to the confluence of the web and the smoothing film, the metering rate being selected to produce a desired coating width. A pliant pressure generating means, in the form of a membrane or a force web, holds a length of the smoothing film against the moving web with a static force whose magnitude is selected in accordance with a desired coating thickness. The relative position of the back-up roller and the pressure generating means determines the length of coincidence of the moving web, the coating liquid, and stationary smoothing film.

Abstract: Precisely positionable apparatus for collecting corona-generated current. A conductive sheet or coating is affixed to one side of an insulative sheet material. A low residue of nonresidue adhesive alone or carried by a tape is affixed to the other side of the insulative sheet. The sheet is then placed on a copier photoconductor or photoconductor carrier such as a drum, adhesive side to the carrier. The adhesive keeps the sheet flat against the surface at which the measurement is to be made. A shock protection line including front-to-back parallel diodes is connected between the conductive surface and ground. With the corona on, and the carrier in position, a current measuring device is connected between the conductive surface on a tab of the sheet and ground.

Abstract: An aqueous blue ink for use in ink jet printing, the ink being a mixture of a blue dye, a cyan dye, a styrene/acrylic binder, water and ammonia as a volatile solubilizing constituent.

Abstract: Method and apparatus for coating both sides of a moving web and for independently controlling the coatings' width, thickness and uniformity of thickness along the length of the web. A moving web is supported on a backing surface. Two stationary and pliant smoothing films are positioned one adjacent each surface of the web, including the web surface which is supported by the backing surface. A coating liquid is metered to each side of the web at the confluence of the web and the two smoothing films, the respective metering rates being selected to produce a desired respective coating width. A pliant pressure generating means, in the form of a membrane holds a length of one smoothing film against the moving web with a static force whose magnitude is selected in accordance with a desired coating thickness. The relative position of the backing surface and the pressure generating means determines the length of coincidence of the moving web, coating liquid, stationary smoothing films and pressure generating means.

Abstract: A layered xerographic photoconductor having a charge generating layer which includes a photosensitive dye molecule which is soluble in chlorinated organic solvents, specifically methylene chloride, the dye molecule being ##STR1## and a P-type charge transport layer.

Abstract: The temperature of a hot roll xerographic fuser is controlled by a control system which compares a command set point temperature to the fuser's actual temperature and energizes a fuser heater accordingly. A cold start of the fuser is distinguished from a warm start, and the command set point temperature is magnitude-programmed accordingly.

Abstract: A moving-document copier wherein a loop-shaped path is used to recirculate a document once for each requested copy, the recirculation path having a skewed turn-around guide which intentionally skews the document's leading edge during recirculation, to avoid document jams. The document is subsequently realigned for rescanning to make another copy. A copy-request counter operates to pivot the skewed turn-around guide to a document-intercept position so long as more copies are needed. When all requested copies have been imaged, the document is allowed to proceed to an exit tray.

Abstract: An electrophotographic copier having a toner concentration control apparatus which periodically effects a toner-patch test cycle during which the optical density of toner deposited on a photoconductor test area is measured, as by light reflectance. A time period of copier non-use, exceeding a preset time period, or a copier on/off operation, referred to as critical events, results in a transient mode of copier operation which includes reduction of photoconductor charge magnitude during the next subsequent use, independent of the extent of the prior copier use history. During such subsequent use, the toner-patch test cycle is operable to effect closed-loop control of changing the photoconductor's charge magnitude back to its nominal working value. More specifically, so long as the results of a toner-patch test cycle indicate an acceptable toner density, the photoconductor charge magnitude is maintained at a lower than working level.

Abstract: A layered electrophotographic plate having a triaryl pyrazoline containing charge transport layer and a charge generation layer having a photogenerating dye of the composition: ##STR1##

Abstract: A method of manufacturing xerographic toner to achieve upper and lower particle size classification by first grinding large pellets of toner material in a jet mill. Upper particle size classification is achieved by then passing the ground material to a coarse classifier which operates to return relatively large particles to the jet mill for further grinding, and supplies the finer particles, which are generally no larger than 13 to 15 microns in diameter, to a cyclone separator. In the cyclone separator, the length of the cyclone's exit duct is controlled to achieve lower particle size classification by causing particles below a generally 5 micron diameter size to exit the separator as waste material by way of its upper exit duct. The finished product exits the cyclone by way of the cyclone's lower output port.