Abstract: The invention concerns a method for treating viscous hydrocarbon containing asphaltenes, which consists in performing the following steps: precipitating at least part of the asphaltenes by adding into the hydrocarbon an appropriate solvent; adding into the hydrocarbon polymerization products adapted to encapsulate the precipitated asphaltenes to inert same.

Abstract: An coated particulate is provided with a graphite-impregnated resin coating. The oil field particulates may comprise any of gravel-pack sand, granular betonite, ground Gilsonite, calcium carbonate, glass beads, rock wool, shredded paper, metal spheres, ceramic beads, nut hulls, ground rubber, plastic beads, muscovite mica, calcined petroleum coke, and perlite. The resin may comprise as a binder one or more of a natural, synthetic, water-soluble, and organic resins. More specifically, the resins may comprise an organic film-forming resin such as an alkyd, polyurethane and epoxy. Alternatively, the resin may comprise a film-forming water-soluble polymer, such as a starch, carboxymethyl cellulose, hydroxyethyl cellulose, and xanthan gum. In a further alternative, the resin may comprise a resin-dispersed emulsion, such as a latex or acrylic.

Abstract: This invention concerns conductive materials based on an encapsulated conductive polymer. Encapsulation in a shell of polymer stabilizes the conductivity of these materials, which can be encapsulated in a shell of film-generating polymer, to give the material formed very good mechanical properties, unlike conductive polymers which existed in the prior art, which, if not encapsulated, form brittle materials that are less stable in time.

Abstract: A material based on a conductive polymer consisting of particles of conductive polymer (P.sub.0), each particle being wrapped in a shell of water-insoluble, cross-linked polymer (P.sub.1).

Abstract: Disclosed is an electrically conductive composite polymer film formed from an organic matrix and conductive charges. The matrix is a polymer obtained from a filmogenic macromolecular latex and the conductive charges consist of a conductive polymer diffused in the matrix. The invention can be applied to microwave absorbent layers.

Abstract: A fuel injection device having a pump piston which during the supply stroke pumps fuel from a pump work chamber into an injection line which leads to a fuel injection valve. Directly adjacent to the branching off of the injection line from the pump work chamber, at the diameter of the injection line, a valve seat is provided, at which the injection line then merges with a chamber into which a pressure valve closing member plunges. The valve closing member is tightly guided in a guide bore, loaded by a valve spring, and in the chamber has a pressure shoulder adjoining the sealing surface that cooperates with the valve seat. The rear side of the pressure valve closing member communicates with a continuously open relief line.

Abstract: A fuel injection device having a pump piston which during the supply stroke pumps fuel from a pump work chamber into an injection line which leads to a fuel injection valve. Directly adjacent to the branching off of the injection line from the pump work chamber, at the diameter of the injection line, a valve seat is provided, at which the injection line then merges with a chamber into which a pressure valve closing member plunges. The valve closing member is tightly guided in a guide bore, loaded by a valve spring, and in the chamber has a pressure shoulder adjoining the sealing surface that cooperates with the valve seat. The rear side of the pressure valve closing member communicates with a continuously open relief line.

Abstract: A rotary printing machine including an impression cylinder which has at least two grippers for gripping the forward edge of a sheet of paper for drawing the paper onto the same at each appropriate instant in each cycle of operation of the machine, the grippers being movable circumferentially of the impression cylinder and retainable in a different position which is stationary relative to the impression cylinder, to vary the relative position of the sheet of paper on the cylinder while the cylinder is rotating.