Abstract: An extruder is purged of residual thermoplastic resin by passing purging compound through the extruder, the purging compound being particles of fluoropolymer which are non-melt flowing at the temperature of operation of the extruder.

Abstract: This invention concerns a process for imparting corrosion and creep resistance to a coating prepared from a particulate polymer composition and applied from a fluidized bed or by electrostatic spraying over metal substrates. The process of the present invention provides for maintaining the content of acid functionality of an acid-functionalized semicrystalline or acid-functionalized amorphous particulate polymer of the particulate polymer composition within a desired range. The acid functionality on the particulate polymer can be maintained, by crosslinking and/or neutralizing, within a desired range of the acid content which results in imparting corrosion and creep resistance to the coating applied over the metal substrates. Neutralizing the acid functionality of the polymer component results in hardening the coatings resulting therefrom. The process further provides for adding anticorrosive pigments to the composition for further improving corrosion resistance of the resultant coatings.

Abstract: Carbon cone and carbon whisker field emitters are disclosed. These field emitters find particular usefulness in field emitter cathodes and display panels utilizing said cathodes. The carbon cone and carbon whisker field emitters can be formed by ion beam bombardment (e.g., ion beam etching) of carbon materials (e.g., bulk carbon, carbon films or carbon fibers).

Abstract: A polyethylene terephthalate film suited for motor insulation is described having the following:(a) an intrinsic viscosity of 0.80;(b) a lateral crystalline size of not greater than 65 Angstroms;(c) an extractable oligomer content of no more than 0.6% by wt.;(d) a hydrolytic lifetime of at least 500 hours;(e) a density within the range from 1.385 to 1.395;(f) no more than 3% by weight comonomer;(g) no more then 1.5% by weight of diethylene glycol as a comonomer;(h) a carboxyl content of no more than 25 milliequivalents per gram of polymer;(i) a particulate content of 0.1 to 2 weight % with the proviso that the polyethylene terephthalate film does not contain an end capping agent; and(j) an embrittlement time at 160.degree. C. of more than 100 days.

Abstract: A clamp for use in stage lighting and similar applications comprises a main body portion which is provided with a pair of wheels and an arm mounted on the main body portion provided with a pair of wheels . A locking handle is pivotally mounted on the arm and is arranged to move the arm between a closed position in which the wheels are engageable with a bar or rail and an open position in which the wheels are clear of the bar or rail. A bolt or screw is secured to the arm and is adapted for attachment to the clamp of a lantern.

Abstract: The catches (10) of the brackets (5) which can be made inactive by the elevator when the elevator is in the low position are designed to interact with corresponding cams (20, 21, 22) of different angular extents, keyed to a shaft (17) which is driven by a motor (22) whose speed and phase are electronically controlled and which is supported rotatably by the base of the machine. When a product is fed onto the elevator and its dimensions are measured by known means which then determine the travel of the film unwinding gripper in the packaging station, if necessary the cam shaft is made to rotate through a distance capable of causing the oscillation of the catches of the brackets which are to be disengaged, so that when the elevator rises the unnecessary brackets are already disengaged and oscillate slowly downwards.

Abstract: Gas is compressed in a liquid jet compressor to high pressures, e.g. at least 7 atm, by using liquid injected under high pressure, e.g. at least 16 atm, to obtain a high velocity liquid injection into the compressor, which aspirates the gas to be compressed into the compressor.

Abstract: Improved liquid phase process useful in the hydrocyanation of diolefinic compounds to produce nonconjugated acyclic nitrites and to the liquid phase process of isomerization of the nitriles to, among other things, 3- and/or 4-monoalkene linear nitrites. The improvement involves conducting the process in the presence of zero-valent nickel and a multidentate phosphite ligand.

Abstract: Inks for ink jet printers containing an aqueous carrier medium; a pigment; a polymeric dispersant; and an emulsion polymer additive stabilized with a structured polymer are stable, have low viscosity, exhibit excellent print quality, provide excellent smear resistance after drying, have good decap and crusting time, and also demonstrate good charging stability when used in continuous flow printers.

Abstract: The invention pertains to aqueous blends of colloidally dispersed polymers for use in making organic coatings which are hard and ductile at ambient temperature, which coatings remain stiff and elastic at temperatures well above their film-formation or drying temperature. In particular, the invention relates to specific combinations or thermoplastic blends of polymers of very high molecular weights. Such blends produce smooth, essentially crack-free coatings when dried conventionally under atmospheric pressure. Such blends are capable of developing the desired balance of properties without conventional amounts of volatile organic coalescing aids and without the need for chemical cure.

Abstract: Six-membered cyclic carbonates (2-oxo-1,3-dioxanes) in which keto or carbohydrocarbyloxy groups are bound to the 5 position of the ring are disclosed. They react surprising quickly with primary or secondary cyclic amines, and the novel product hydroxyurethanes are useful as reactive diluents.

Abstract: Valve unit, particularly for high-pressure pumps, comprising a cage mainted in position by a screwed plug and containing a valve disc and a valve seat, the screwed plug having a threaded shank provided with an annular groove for a seal gasket in contact with the inner wall of the cavity which receives the valve unit, said annular groove for receiving said seal gasket being positioned adjacent to that end of said thread close to the valve unit, and being inserted into a portion of the plug receiving cavity having a diameter less than the outer diameter of the plug thread.

Abstract: An improved aqueous cathodic electrocoating composition of an aqueous carrier having dispersed therein a film forming binder of (1) an epoxy-resin amine adduct and (2) a blocked polyisocyanate crosslinking agent; wherein the improvement is an epoxy resin amine adduct which is a reaction product of an epoxy resin and a polyhydric phenol which is chain extended with a primary amine to form a chain extended epoxy resin having epoxy end groups and an equivalent amine to epoxy ratio is 1-10 to 4-10 and wherein the epoxy end groups of the resin are reacted with a ketimine and/or a diamine and the resulting chain extended epoxy resin has an epoxy equivalent weight of about 700-2,000 and is neutralized with an organic or inorganic acid; wherein the electrocoating composition has improved throw power and forms coatings that have improved corrosion resistance in comparison to conventional electrocoating compositions formed from epoxy resins extended with conventional diamines or polyols.

Abstract: Hazardous electrical shocks are prevented in an electrical system, such as a swimming pool lighting system having submerged pool lights, by periodically testing for all potential hazardous electrical shock conditions associated with the system and blocking electrification of the system in response to the detection of any shock condition.

Abstract: A snare mounting and tension adjusting arrangement includes a tension adjustment unit and a snare holder unit fastened to the peripheral wall of a snare drum to hold a snare under the snare head of the snare drum, wherein the tension adjustment unit includes a locating frame fixed to the snare drum at one side, a slide coupled to a rail at the locating frame, an adjusting screw bolt mounted in a through hole at the locating frame and threaded into a screw hole at the slide and rotated to lift/lower the slide along the rail in adjusting the tension of the snare, and a locking lever pivoted to the slide and controlled to lock the slide.

Abstract: Disclosed herein are novel electrophoretic displays and materials useful in fabricating such displays. In particular, novel encapsulated displays are disclosed. Particles encapsulated therein are dispersed within a suspending, or electrophoretic, fluid. This fluid may be a mixture of two or more fluids or may be a single fluid. The displays may further comprise particles dispersed in a suspending fluid, wherein the particles contain a liquid. In either case, the suspending fluid may have a density or refractive index substantially matched to that of the particles dispersed therein. Finally, also disclosed herein are electro-osmotic displays. These displays comprise at least one capsule containing either a cellulosic or gel-like internal phase and a liquid phase, or containing two or more immiscible fluids. Application of electric fields to any of the electrophoretic displays described herein affects an optical property of the display.

Abstract: An improved polarization beam splitter formed by a collimator and two similarly shaped, birefringent crystal prisms is provided. The light from the collimator is incident upon the first face of the first birefringent crystal prism which also has second and third faces. The collimated light is incident upon the second face at an angle .phi. with respect to a line normal to the second face so that light polarized perpendicular to a plane of incidence upon the second face is reflected toward the third face and light polarized in the plane of incidence is refracted at the second face. The second birefringent crystal prism has a second face parallel to, and in close proximity with, the second face of the first birefringent prism so that light refracted at the second face of said first prism is refracted at the second face of the second prism and into the second prism.

Abstract: A fiber Bragg grating DFB-DBR interactive laser is provided by an optical fiber section which is doped with at least one gain-inducing material. At each end of the section there is a fiber Bragg grating which operates as part of a fiber DBR laser. Between these two gratings there is a third fiber Bragg grating which has a 90.degree. phase shift region. The third fiber Bragg grating effectively operates as part of a fiber DFB laser. Each of the fiber Bragg gratings has a narrow reflective linewidth centered about the same wavelength so that the optical fiber section operates as a fiber Bragg grating DFB-DBR interactive laser upon sufficient pumping energy. The resulting fiber Bragg grating DFB-DBR interactive laser can be appropriately connected to pumping laser sources and WDM couplers to create fiber laser sources which are particularly adaptable to fiberoptic networks, particularly WDM and DWDM networks.

Abstract: A method for making arthropodicidal oxadiazines and intermediates which are racemic or enantiomerically enriched at their chiral center, the method for making the oxadiazines comprising reaction of an intermediate selected from ##STR1## wherein: R.sup.1 is F, Cl, or C.sub.1 -C.sub.3 fluoroalkoxy,R.sup.2 is C.sub.1 -C.sub.3 alkyl, andR.sup.4 is H or CO.sub.2 CH.sub.2 (C.sub.6 H.sub.5).as well as certain selected intermediates including those depicted above, and methods of making them.

Abstract: A process is disclosed for the separation of a mixture of HF and CF.sub.3 CClFCF.sub.3. The process involves placing the mixture in a separation zone at a temperature of from about -30.degree. C. to about 100.degree. C. and at a pressure sufficient to maintain the mixture in the liquid phase, whereby an organic-enriched phase comprising less than 50 mole percent HF is formed as the bottom layer and an HF-enriched phase comprising more than 90 mole percent HF is formed as the top layer. The organic-enriched phase can be withdrawn from the bottom of the separation zone and subjected to distillation in a distillation column to recover essentially pure CF.sub.3 CClFCF.sub.3. The distillate comprising HF and CF.sub.3 CClFCF.sub.3 can be removed from the top of the distillation column while essentially pure CF.sub.3 CClFCF.sub.3 can be recovered from the bottom of the distillation column.