Abstract: The invention deals with the construction and shape of the electrode employed in a duplicating apparatus which uses a drum shaped gas-ion modulating device. The curved modulator is matched with a curved gas-ion collecting electrode so that the propagation of the charged particles follows along the electrical field lines which are symmetrical about a center axis running longitudinally between the modulator and the collecting electrode. The ion optical system assures the production of a charge pattern on the dielectric paper that corresponds to the charge distribution system on the modulator.

Abstract: The illumination station of a photocopier is arranged with a downwardly facing transparent platen to which the originals are presented for copying. There is an original support platen opposed to and beneath the transparent platen which can be raised and lowered to present to the transparent platen three-dimensional originals, such as books, of varying thicknesses. The upper surface of the original support platen incorporates a transport by means of which originals of the sheet type may be fed seriatim into the illumination station when the original support platen is in its uppermost position.

Abstract: Corona electrodes in electrostatic copying machines take the form of a fine gauge wires, and when subjected to toner an atmosphere with a high density of particle dispersion, can become covered with a deposit which impairs their effectiveness. Cleaning of such a wire is situ without danger of injury thereto is effected by periodically inducing vibrations in the wire, either by controlled mechanical plucking, or by electromagnetically or electrostatically inducing vibrations.

Abstract: A transport mechanism for successively positioning micro-images disposed on one of two elongated film cards in an illumination path of a viewer printer machine includes a carriage assembly moveable between first and second positions in a first direction of travel having mounted thereon a film holder assembly moveable in a second direction of travel angularly disposed with respect to said first direction of travel. First independently actuable apparatus is provided for transporting the carriage assembly between first and second positions to align one of the elongated film cards in the illumination path, and second independently actuable apparatus is provided for incrementally transporting the holder to successively align the micro-images on one of the film cards in the illumination path.

Abstract: An improved mechanism for properly aligning a rotatable indicia carrying member and for locking said rotatable indicia carrying member in place. Both the aligning and locking mechanisms are formed as integral parts of a single frame unit and are operative to perform their respective aligning and locking functions during movement of the frame unit into engagement with the rotatable member.

Abstract: A system for establishing the speed of an electric motor, particularly a direct current motor. The principal use is in the control of a drive motor for a photocomposition machine font disc. The speed is controlled by spacing pulses of power to the motor. The pulses are derived from a central output of a left shift--right shift register. Shift in one direction is obtained from a uniform clock source, and in the opposed direction from a generator responsive to motor speed. When the motor speed causes the register to shift left beyond the control output, power is cut off and the motor slows. Slowing will allow right shift and a renewal of power pulses.

Abstract: In a liquid supply system for a developing apparatus, a liquid absorbing wick construction which is formed of polyester fibers matted together to form a liquid absorbant pad which, when it is pressed against the surface of a rubber applicator roller, feeds and supplies liquid to the rubber roller surface. The fibers are formed from polyethylene terephthalate resins which are formed into a unitary pad by "needling" the fibers together and which is then enclosed either entirely or partially by a sheath so that the fibers are retained on the pad.

Abstract: An ion modulator of improved sensitivity and capable of producing copies of excellent quality is provided in the form of a conductive metal screen which is coated with a photoconductor or insulator and having a supplementary electrode forming an integral part thereof. The supplementary electrode functions to provide a positive or negative bias potential resulting in a larger transmission coefficient, better gray scale, improved light sensitivity, and the ability to operate in both positive and negative modes.

Abstract: A photosensitive composition useful in providing a positive or negative presensitized coating on a hydrophilic substrate in photosensitive reproduction comprises1. a cumulene compound having the general formula: ##EQU1## WHERE N= 1-6 AND R.sub.a, R.sub.b, R.sub.c and R.sub.d are selected from the group consisting of ##SPC1##Or H and wherein R.sub.1 and R.sub.2 are the same or different alkyl or aryl radical and each ##EQU2## group can be positioned at any other position on the benezene ring, such as ##SPC2##2. an organic polyhalogenated initiator solid at room temperature such as CBr.sub.4, and CHI.sub.3 ; and3. one or more solvents suitable to dissolve the cumulene compound and the organic polyhalogenated initiator such as CHI.sub.3.

Abstract: An electrophotographic system is described in which a photoconductive ion modulator screen is used in conjunction with an anodized aluminum dielectric imaging surface. This combination enables the steps of image transfer and fixing to be carried out simultaneously without destroying the latent image produced on the dielectric imaging surface.A duplex anodized aluminum coating is prepared by forming a porous aluminum oxide layer by electrolytically oxidizing an aluminum surface and thereafter continuing the electrolytic oxidation under conditions which produce a barrier type aluminum oxide layer. The resulting duplex anodized aluminum coating containing both porous type aluminum oxide and barrier type aluminum oxide is used as the dielectric imaging surface in this electrophotographic system.

Abstract: An electrophotographic system is described in which a photoconductive ion modulator screen is used in conjunction with an anodized aluminum dielectric imaging surface. This combination enables the steps of image transfer and fixing to be carried out simultaneously without destroying the latent image produced on the dielectric imaging surface.A duplex anodized aluminum coating is prepared by forming a porous aluminum oxide layer by electrolytically oxidizing an aluminum surface and thereafter continuing the electrolytic oxidation under conditions which produce a barrier type aluminum oxide layer. The resulting duplex anodized aluminum coating containing both porous type aluminum oxide and barrier type aluminum oxide is used as the dielectric imaging surface in this electrophotographic system.

Abstract: A laminated article comprising a magnetic impulse record element secured to a vinyl plastic member through an interface of a composition containing polyvinyl chloride, polyvinyl acetate and polyvinyl alcohol. The interface contributes to the formation of a record element of improved quality when the latter is transferred as a magnetic coating from a carrier to the vinyl plastic member in a hot stamping operation.

Abstract: Electrostatic toner powder images on copy sheets are fixed by the application of pressure alone, using sets of mating rollers so arranged that each set nips and treats a narrow track on the sheet, and also so arranged that the treated tracks have slightly overlapping margins whereby the full area of the sheet is treated in the process.

Abstract: A data terminal is disclosed and which is particularly applicable for use in data capture and data readout in a data communication system. The terminal includes means for providing a data output presentation of indicia representative of various information data characters. The presentation of indicia may, for example, include a printing function. The terminal employs a memory which stores information data characters representative of different indicia to be presented. The data characters may be entered into the memory from a data source, such as a keyboard or a central data processor. Circuitry is provided for controlling the presentation of indicia so that the indicia is presented in an orientation determined by the sequence in which the data characters are read from the memory.