Abstract: An ink feeder comprises a plurality of ink tanks for storing inks and wetting water, disposed in a transverse direction of an ink fountain roller, a vane wheel disposed at the bottom of an ink tank, an ink pump for feeding ink, an ink feed blade for adjusting the quantity of ink supplied from the ink pump to the ink fountain roller to a constant value, and a coupling for transmitting the driving force of a single motor to the vane wheel and the ink pump provided to each ink tank. The ink tanks, the ink pump, the ink feed nozzle, the ink feed pipe and the ink feed blade mechanism may be built into one unit, and this unit can be fitted to and removed from the main body of the printing press. The ink feeder may be equipped with an ink scraper comprising scraped ink separators arranged parallel in the axial direction of the scraping doctor support device.

Abstract: A grinding wheel having a circular outer periphery, and a working front end face for grinding a roll as installed in place on a rolling mill or other equipment, such that the front end face is held in pressed frictionally sliding contact with an outer circumferential surface of the roll. The wheel has an annular first abrasive member, and one or two annular second abrasive member(s) which is/are formed integrally with the first abrasive member, and disposed on corresponding at least one of the radially outward and inward sides of the first abrasive member. Each second abrasive member comprises a bonding agent different from that of the first abrasive member, and has a lower modulus of elasticity than the first abrasive member. Also disclosed is a grinding wheel which has a single abrasive body whose outer and/or inner circumferential surface(s) is/are tapered such that the radial wall thickness decreases in an axial direction toward the working end face.

Abstract: A floating liquid-storage tank has side walls of double-hull construction for storing a liquid lighter in specific gravity than water. The double-hull side walls consist of inner and outer hull sections and have watertight partition plates for dividing the hollows of the side walls into upper and lower ballast tanks. The outer hull sections of the upper ballast tanks are built to be resistant to the external water pressure and those of the lower ballast tanks are non-pressure-resistant. Holes through which the water outside can enter the lower ballast tanks are made in the outer hull sections of the lower ballast tanks. The partition plates are horizontally located at or slightly below the level of the intersection of the liquid-pressure distribution line and the external-water-pressure distribution line in the direction of depth of the storage tank in the full loaded condition.

Abstract: A barge-carrying ship comprising a crane of a lifting-beam type installed at the end of the ship for hoisting barges afloat, runway rails laid on the upper deck and along the inner walls of the both sides of the hull, barge-end-holding trucks disposed in pairs on the rails to travel thereon, each pair of said trucks being capable of taking over a hoisted barge from the crane and carrying the barge while supporting the same at both ends, and another lifting-beam crane installed amidships along a hatch opening of the deck for hoisting the barge from the pair of trucks and lowering or raising the load.