Abstract: Photoelectrophoretic imaging system having an additional electrode for subjecting a film of photoelectrophoretic imaging suspension to an electric field at a potential above the corona threshold of the film prior to image exposure. The effect of the electric field and resulting current causes electrophoretic deposition of the imaging particles in the imaging suspension in a uniform layer to thereby eliminate or reduce background degradation in the final image formed.

Abstract: A reproduction machine adapted for producing copies of an original on either or both sides of a copy sheet and forwarding the finished copy to a collator. To collate the produced copy in the proper orientation, an inverter-reverser is employed to allow single-sided copy to pass directly to the collator, route single-sided copy to a secondary feed tray for subsequent processing to allow copying on the reverse side of the sheet to produce duplex copies, and for inverting duplex copies prior to delivery to the collator to provide the required sheet orientation in the collator.

Abstract: A fuser includes a pair of members defining a zone, a pair of electrical elements supported in series with a power supply by one of the members, and a thermostatic switch being electrically connected in parallel with one of the elements. When the temperature in the zone is below a predetermined level the switch is closed and shorts out the element with which it is in parallel. The switch opens when the temperature rises above said predetermined level, whereby less heat is provided for the zone. This arrangement provides a rapid warm up for the zone. Heat distribution in the zone is achieved by supporting the heating elements in zigzag fashion. Sagging of the elements thus mounted is prevented by bias means which maintain the elements under tension.

Abstract: To provide simultaneous and efficient mixing and blending of the toner and carrier components of a multicomponent developer, there is a hybrid crossmixer comprising an auger-type active section and a pair of baffle-type passive sections. The crossmixer is used, for example, in a magnetic brush development system on the downstream side of the development zone. In that event, the partially denuded developer exiting from the development zone is split, with approximately half being routed to the active section and the other half being more or less equally divided between the two passive sections. Furthermore, the additional toner needed from time-to-time to maintain the toner concentration of the developer at a suitably high level enters the system via the active section of the crossmixer to ensure that it is rapidly blended in with the balance of the developer.

Abstract: Flash fusing method and apparatus for fusing toner images onto flexible support material in which the support material is transported in a cylindrical path encircling the flash fusing lamp. The support material is a web or alternatively is in the form of copy sheets tacked onto a transport belt either by electrostatic tacking or by a vacuum transport and then advanced in a circular path around the flash with the toner images facing the flash lamp and receiving a uniform radiation therefrom.

Abstract: A transparency is disclosed, which is suitable for use in a multicolored xerographic reproduction process comprising a transparent, thermoplastic film sheet having at least one surface coated with a material selected from the group of nonvolatile amine compounds. The coated transparency, when used in a multicolored electrostatic copying process improves adhesion of the multicolored image thereon and permits reproduction of colors and color densities in said image which correspond well to the copied multicolored original.

Abstract: An improved collating apparatus for a high speed duplicator machine, including a set of collating bins for collating the copy sheets being produced by the machine, a set of collecting bins, means for releasing the collated sheets into the collecting bins. The bottom members of the collating bins are operable to open for releasing the collated sheets into the collecting bins whereby the collating bins are conditioned to be ready for a succeeding cycle of operation without interruption, if required. The apparatus may be also provided with vibrating means to jog the collated sheets to align the edges thereof for subsequent removal. The improved apparatus provides an increased throughput capacity to the machine, simplifies the mechanism and control circuitry involved and makes optimal utilization of the space provided for the machine.

Abstract: A programmable controller is used to control the operation of a xerographic reproducing machine adapted to run in a simplex or duplex mode whereby copies are made on either or both sides of web material fed in a single pass and then cut into individual copy sheets. A control program, comprised of a set of program instructions, enables the controller to generate control signals for actuation of the process devices of the reproducing machine in a timed manner for production of copies as directed by the operator. In response to instructions by the operator concerning copy length, copy numbers, etc., the control program permits the calculation of requisite timing information for control of the machine operating components. The control program permits the operation of the reproducing machine to concerning copy length, copy numbers, etc., the control program permits the calculation of requisite timing information for control of the machine operating components.

Abstract: Apparatus of the type wherein a desired length of adhesive strip is fixed to an edge of a stack of sheets with heat and pressure includes automatic means for reliably providing the desired length of strip from a roll of adhesive strip. The automatic means include a pair of rollers which engage and feed strip, one of the rollers being mounted for free rotation and the other of the rollers being coupled to a shaft by a one-way clutch. Means rotate the shaft from a start-of-feed position a selectable amount in one direction, with said other roller and clutch engaged, to feed the desired length of strip and, thereafter, a spring counter rotates the shaft to the start-of-feed position, said position being determined by an abutment which limits rotation of a gear coupled to the shaft. A flywheel frictionally coupled to the shaft prevents bounce when the abutment limits rotation of the gear, thereby preventing rotation of the shaft in said one direction and, consequently, unmetered feeding of adhesive strip.

Abstract: An apparatus for feeding individual sheets over a support surface such as a transparent viewing platen. The apparatus includes means for feeding the sheets wherein the feeding means is movable between an operable position over the surface and an inoperable position off of the surface. Latching means are provided for locking the feeding means in the operable position. Actuating means are provided for moving the feeding means between the operable and the inoperable positions, and for locking and unlocking the latching means. Means are provided operatively associated with the latching means and the actuating means for unlocking the latching means prior to movement of the document feeder off the surface. The unlocking means preferably comprises a lost motion device. A reproducing machine including the above-noted feeding apparatus is also provided.

Abstract: An electrostatographic imaging process comprising the steps of providing an electrostatographic imaging member having a recording surface, forming an electrostatic latent image on said recording surface, and contacting said electrostatic latent image with a developer mixture comprising classified toner materials electrostatically clinging to the surface of classified high surface area carrier materials, said classified toner materials having a particle size number distribution with a fine index ratio of less than about 2.50, a particle size volume distribution with a coarse index ratio less than about 1.50, and a particle size distribution wherein less than about 30.

Abstract: A magnetic card transport subsystem for an electronic typewriter comprises a reversible drive roll and a coacting pinch roll which form a nip through which a magnetic card is passed. The drive roll and pinch roll coact to move the card in opposite directions. The pinch roll is so mounted that it can rock and be self-leveling to permit the full width of the pinch roll to engage the card and uniformly distribute pressure thereto. A mechanism for adjusting the pinch roll for alignment purposes is also provided.

Abstract: Polymeric photoconductive composition having recurring structural units of the formula: ##EQU1## WHEREIN R is hydrogen or alkyl of 1-4 carbon atoms;R' is alkyl of 1-4 carbon atoms, cycloalkyl, phenyl, or alkyl substituted phenyl;B is phenylene or a diradical of a fused aromatic nucleus having up to four benzene rings;A.sub.r is selected from the group consisting of naphthalene, anthracene, pyrene, perylene, julolidine, carbazole, their respective homologues and analogues;x is 0 or 1;y is 0 or 1; andn is at least 2.The above polymeric compositions are suitable for use as charge transport matrices for photogenerator materials or can themselves be complexed with an appropriate activator and thus, form a charge transfer complex which is itself capable of photoresponse within the visible region of the electromagnetic spectrum.

Abstract: A biased roller electrostatographic image transfer system in which the diameter of a resilient bias transfer roll is slightly larger at its outer end areas in comparison to its central copy sheet engaging area, so that the majority of the roll loading pressure is absorbed by these larger diameter end steps, which roll directly against the imaging surface outside of the copy area, and so that a relatively lower roll pressure is provided against the copy sheet in the operating nip. This reduction in the mechanical pressure in the transfer nip can provide lower "hollow character" transfer defects, yet allows a sufficiently high roller loading force to prevent roll bounce and vibration.

Abstract: This invention relates to a method and apparatus for creating high shear stresses in a particulate suspension prior to use of such suspension for imaging or inking. The method and apparatus in one environment function to stress a thin layer of an electrophoretic suspension of particles in a liquid carrier. The prestressed suspension is better suited than unstressed suspensions for preparing both monochromatic and polychromatic copies from originals by particle migration through the suspension when it is exposed to electromagnetic radiation in image configuration while in an electric field across the suspension between two electrodes. The method and apparatus is also used for printing inks in order to form a prestressed, uniform, thin layer of the ink for application to the press.

Abstract: A die for through feed thread rolling of fine external threads on a cylindrical work piece or applicator roll is given whereby a die having substantially uniform threads and a variable diameter is employed.

Abstract: A development system comprising a small compact modular developer unit which is retractably engagable with an image bearing surface is provided. The developer module contains within its casing developer feed and doctoring systems to provide a developer applicator surface containing appropriate quantities of developer. The system may use liquid and powder developers and is capable of high speed operation.

Abstract: Drive mechanism for a roll fuser employed in a copier apparatus characterized by the provision of input drive means for rotating a fuser roll and also for rotating a backup roll while the two rolls are disengaged, and further characterized by the provision of a flexible drive shaft or coupling for the backup roll which allows for displacement of the backup roll for engagement with the fuser roll. A sump containing offset preventing liquid and means for applying the liquid to the fuser roll structure are disposed beneath the fuser roll structure which, in turn, is positioned below the backup roll. The drive means is so positioned relative to the sump as to preclude contamination therefrom entering the sump.

Abstract: The optical transitions of extrinsically optically active insoluble materials become optically active and circularly dichroic when in contact with optically negative liquid crystalline materials thereby providing unusual and highly advantageous properties. The circularly dichroic optical properties induced in the extrinsically optically active insoluble materials can be utilized for optical filter applications.

Abstract: Images are formed by transporting a recording surface bearing an electrostatic latent image adjacent to a spaced parallel surface of a development electrode and supplying a liquid developer between the recording surface and parallel surface of the development electrode at substantially the same velocity as the velocity of the recording surface.