Abstract: Apparatus for holding a master microfiche in contact with a copy sheet of film in a machine that includes rollers for moving the copy sheet onto the master and then off of it towards a developing station. The holder includes a base or lower frame containing a glass plate, and an upper frame that can move away from the lower frame to enable the insertion of the master between the upper frame and the glass plate. The upper frame includes thin rollers rotatably mounted about a vertical axis and having peripheral portions lying over the edge of a master on the lower frame. A transport roller for feeding a copy film onto the master, can bear against the periphery of the thin roller, so that the copy film is captured between the two rollers to facilitate its movement. The frame can be lifted by pivoting down a handle at one side of the holder, which slides a pair of rods with camming portions that move against the upper frame to lift it.

Abstract: An apparatus is provided for producing magnetically encoded articles such as credit cards. Data from a master or other source is recorded on an elongated web carrying magnetically encodable material which is secured to a card blank or other article. Data from the master tape is stored in a memory and held for comparison with recorded data to verify correct recording. In the absence of a proper comparison the data is inserted from memory and recorded on the next card blank, which is then placed in the proper sequential position in the output stack.

Abstract: Coated carrier particles for use in an electrophotographic process are prepared by applying a thin coating of a phosphonitrile fluoroelastomer to the surface of the carrier particles. The coated carriers are long lived and capable of imparting a negative triboelectric charge to electroscopic powders mixed therewith.

Abstract: Carrier particles for use in an electrophotographic process are prepared by applying a mixture of a perfluoro acid and molybdenum disulfide to the surface of the carrier particle. The resulting carriers have a very thin and effective film deposited on the surface thereof and are long lived and abrasion resistant.

Abstract: An ion modulator having a bias electrode is capable of producing copies in which the contrast and background are controllable. Such modulator functions in a process which utilizes an adjustable charge density applied to set up uniform fringing fields of the desired magnitude which block ions directed towards background (light) areas. Funneling fields are set up in image (dark) areas in opposition to the original fringing fields by simultaneous imaging and ion projection, decreasing the effect of such fringing fields and permitting ions to pass through the modulator in image areas.

Abstract: A secure property device utilizing radiant energy reflectors applied to a magnetic data member is provided in which the specularity of reflections from the reflectors is enhanced by means of a polymeric primer which is chemically and optically compatible with the reflectors and with the magnetic data member to which it is applied.

Abstract: A non-aqueous polymeric dispersion of an acrylic or methacrylic polymer in a non-aqueous continuous phase having a hydrogen bonding index, .delta., greater than 10, a dipole moment, .mu., between 0.5 and 2.5 and a solubility parameter, .delta., less than 8 dries to produce a matte or low gloss coating.

Abstract: A cap assembly is provided for use with a container for storing and supplying aqueous ammonia to a diazo type copying machine. The cap assembly comprises a closure member mounted on the container and a key device associated with free ends of an ammonia feed tube and a drain tube connecting the container to a developer system of the copying machine. The closure member includes a feed outlet to permit ammonia flow from the container to the feed tube and a drain outlet to permit ammonia flow from the drain tube to the container. The closure member also includes a seal adapted for selective actuation by the key device between a first position for closing the feed and the drain outlets to prevent ammonia flow and a second position for opening the outlets to permit ammonia flow.

Abstract: A translucent sheet bearing opaque graphic intelligence thereon coated with a film which absorbs ultraviolet light, whereby the passage of visible light therethrough projects a legible image while light in the ultraviolet range is not transmitted so that diazotype copies cannot be produced of the graphic intelligence.

Abstract: Carrier particles for use in an electrophotographic process are prepared by applying a mixture of a perfluoro acid and molybdenum disulfide to the surface of the carrier particle. The resulting carriers have a very thin and effective film deposited on the surface thereof and are long lived and abrasion resistant.

Abstract: Carrier particles for use in an electrophotographic process are prepared by applying a mixture of a perfluoro acid and polyvinylidene fluoride to the surface of the carrier particle. The resulting carriers are long lived, abrasion resistant and capable of imparting a high triboelectric charge to electroscopic powders mixed therewith.

Abstract: Carrier particles for use in an electrophotographic process are prepared by coating a particulate matrix with an ion exchange resin dispersed in a polymeric binder. The resulting coated carrier particles are long lived and depending upon the choice of ion exchange resin can be used to impart a positive or negative triboelectric charge of the magnitude desired to electroscopic powders mixed therewith.

Abstract: Compositions useful for eradicating images which have been produced upon paper by electrophotographic or similar means are provided. Suitable formulations include an alcohol having 1 to 3 carbon atoms or a nitrile having 2 to 3 carbon atoms and are derived from a solvent formulating map prepared from a plot of hydrogen bonding indices against solubility parameters. In general such formulations include a mixture of solvents and may include a ketone or ester in addition to such alcohol or nitrile.

Abstract: A photoconductive coating having an improved charge acceptance is produced by vacuum evaporation of amorphous selenium in the presence of an inert gas.

Abstract: A microfiche viewer is provided with means for selecting one microfiche carrier from a plurality of microfiche carriers contained within a magazine for holding the same, means for positioning such selected microfiche carrier along a first axis, means for positioning an optical-projecting means along another axis perpendicular to the first axis whereby a preselected frame of a microfiche contained within the carrier can be viewed on a screen and means for replacing the microfiche carrier into the magazine.

Abstract: A self-priming pump is provided for metering a positive controlled amount of a volatile liquid to a utilization device. The pump comprises a piston means for pumping the liquid from a liquid supply container to a chamber, and from the chamber to a reservoir where the liquid is maintained at a uniform and constant level by an overflow port which drains any excess liquid back to the liquid supply container. The liquid remaining in the reservoir flows through an outlet passage to a well from which the liquid is dispensed in metered units under control of an adjustable needle valve. The needle valve is provided for controlling the rate of feed of the liquid to the utilization device, and is accessible for adjusting the liquid flow while the pump is in operation. The reservoir is also provided with vent means to prevent impediment of liquid flow and, also, to permit liquid flow immediately in response to initial start-up and operation of the pump.

Abstract: An ion modulator having a bias electrode which is independently controllable improves the modulation and focusing of projected ions. Such a modulator is constructed so as to reduce the adverse effects of corona discharge upon the modulator.

Abstract: An ion modulator having a bias electrode which is independently controllable improves the modulation and focusing of projected ions. Such a modulator is constructed so as to reduce the adverse effects of corona discharge upon the modulator.

Abstract: A purging system is provided for reducing and substantially eliminating contaminants, moisture, residual gas and the like from a work station such as, for example, a developer station in which ammonia gas is used for development of diazo type films. The system includes a check valve connected between one end of the developer station and a supply of compressed air, and a 3-way valve connected between the other end of the developer station and a supply of ammonia gas and an ammonia exhaust container. During development, the ammonia is passed into the developer station under a relatively high pressure and the flow of the ammonia is stopped by the check valve. After development, the pressure in the developer station is lowered thereby opening the check valve and causing flow of air from the supply of compressed air through the developer station, the 3-way valve, and into the exhaust container to thereby purge the entire system of contaminants, moisture and residual ammonia gas.

Abstract: A cassette is provided for manually transporting a sheet of photographic film from one station to another without exposing the film to ambient light. The cassette comprises a light-tight enclosure provided at one end with a pair of rollers and at the other end with a resilient light seal. The rollers are adapted to be rotated in response to engagement with driven rollers associated with one station for advancing a film sheet into the cassette. The film sheet is positioned within the enclosure with a lead end thereof protruding from the resilient light seal. The cassette is then carried to another station where the lead end of the film is adapted to be inserted into a pair of driven rollers associated with another station for withdrawing the film sheet from the cassette.