Abstract: A printing cylinder assembly adapted to be removably supported on a hydraulically operable mandrel having means to hydraulically apply radially outward forces is disclosed. The printing cylinder assembly has a generally cylindrical coated printing cylinder having two open end portions, and a generally annular sleeve positioned within each end portion and in shrink fit relation therewith. Each annular sleeve has a generally annular groove therein and at a location which corresponds to the general location of application of the radially outward forces when the cylinder is positioned on the mandrel. Radially outward forces are hydraulically developed by the mandrels and are transmitted to the cylinder through the annular sleeves to retain the cylinder and the mandrel as an integral unit. The grooved portion of each annular sleeve defines two adjacent annular stepped portions wherein the grooved portion has a greater flexibility in the radial direction than the adjacent stepped portions.

Abstract: A toothed gear is secured to an associated shaft by an expansive sleeve which is expanded radially inwardly by the pressure of a hydraulic actuator.

Abstract: A mandrel for supporting printing sleeves and the like comprising a hollow cylinder with a multiplicity of expansion chambers axially spaced along the cylinder at its outer surface. Each chamber is closed by an expansion sleeve and connected to a separately controlled hydraulic line allowing each sleeve to be expanded independently of the others.

Abstract: A mandrel for the support of a printing cylinder includes a hollow cylindrical shell, the axial ends of which are enclosed by trunnions and expansion heads. Compressed air is admitted into the shell through one of the trunnions and escapes through apertures in the hollow shell and into the interior of a printing cylinder, and, is employed to expand a resilient sheath positioned on the printing cylinder.

Abstract: Adaptors for expandable mandrels of printing presses are formed as annular members which are slidable over the journals of the mandrel and lockable thereto, the adaptors each having an outwardly expandable external periphery for gripping and holding a printing cylinder of a diameter larger than that of the mandrel.

Abstract: A printing cylinder is supported and located by dual annular hydraulically-expansible heads carried by a shaft and adjustable axially thereof and which are inserted into the printing cylinder and then expanded inwardly into locking engagement with the shaft and outwardly into locking engagement with the cylinder.

Abstract: An improvement in the separation of suspended solids from coal-derived liquids by a separations process in which solids size is a separations parameter is achieved by contacting the coal-derived liquid containing suspended solids with an effective amount of an additive selected from the group of sulfuric acid, phosphoric acid, phosphoric anhydride and salts of sulfuric and phosphoric acid, and maintaining the contacted liquid at a temperature within the range of about 150.degree.-400.degree. C and for a time sufficient to achieve the desired separation rate.

Abstract: A coupling converter for use of a broadcast-receiving antenna both with its broadcast receiver and with a citizens band transceiver, including impedance matching means and a priority switch to protect the transceiver from overload by transmission without sufficient antenna loading.

Abstract: A carrier sleeve for supporting flexible printing plates, the sleeve having a limited circumferential resilience, whereby when subjected to air jets emitted from the apertures in the wall of a printing cylinder, the sleeve is dilated to facilitate the application of the sleeve to the cylinder or its removal therefrom. The sleeve is constituted by three interlaminated layers, each formed by a helix of synthetic plastic tape. Two layers of the sleeve are wound at the same helix angle but are phase displaced relative to each other, whereby the air gap between the convolutions of one layer is bridged by the convolutions of the other, thereby sealing the gap and rendering the sleeve impermeable to air. The remaining layer is wound at an angle opposed to the helix angle of the other two, thereby strengthening and rigidifying the structure of the sleeve.