Abstract: A copolymer of p-methylstyrene and N-substituted maleimide exhibits high temperature stability.

Abstract: A cooling structure for a multi-cylinder piston-engine cylinder block includes a side coolant gallery distributing coolant into a water jacket surrounding a group of cylinders arranged from upstream to downstream. The flow cross-section of the coolant gallery decreases toward its downstream end. The water jacket has a water jacket wall which constitutes part of the coolant gallery. The water jacket wall includes a group of coolant inlets, each of which directs coolant towards the upper part of each of the cylinders. At least one coolant inlet is offset from the center of the corresponding cylinder toward a clearance between adjoining cylinders. This cooling structure can cool all of the cylinders uniformly and the entire surface of each cylinder evenly.

Abstract: A sugar-coated tablet for medical use comprising a core containing low-melting fat-soluble pharmaceutical material and a sugar coating layer on said core, which is characterized by the feature that at least one water-soluble cellulose ether coating film is present between the core and the sugar-coating layer.

Abstract: A structure of a cylinder assembly of an internal combustion engine has a coolant circulating system for cooling the cylinder assembly while the engine is driving. The cylinder assembly generally comprises a cylinder block formed therein a plurality of engine cylinder in line, and a cylinder head sealingly mounted on the cylinder block. The coolant circulating system comprises a coolant chamber formed within the cylinder block so that it surrounds substantial part of each engine cylinder, a return passage formed in the cylinder head. The coolant chamber communicates with the return passage through a plurality of vertical passages. Adjacent the top of the vertical passage, there is provided with a projecting portion inwardly projecting thereto. A sloped passage is formed within a partition disposed between each of adjacent engine cylinder. The upper end of the sloped passage is opened at the projecting portion at right angle to the planar surface of the projecting portion.

Abstract: A duplicator in which analog signals recorded on a master or like source tape are transferred to digital discs after conversion into digital form and the digital signals thus recorded on the digital discs are then transferred to slave tapes after reconversion into analog form.

Abstract: High-density polyisocyanurate resins having improved rigidity, heat resistance and/or impact resistance can be obtained by reacting a polyisocyanate with a polymer polyol derived from a polyol having a molecular weight of at least 4500, and optionally a crosslinker, in the presence of trimerization catalyst, using isocyanate index of 200-5000.

Abstract: A process for tapering synthetic fibers at the end portion thereof comprising the steps of inserting synthetic fibers into a supersonic vibration-given etching liquid to an extent that only the end portion of the fibers is immersed therein, withdrawing the fibers from the supersonic vibration-given etching liquid and then washing the treated fibers in a supersonic vibration-given washing liquid, the insertion and withdrawal being alternately repeated each at a predetermined velocity. In one embodiment, the etching liquid has abrasive particles suspended therein or an abrasive brush provided therein.

Abstract: A flexible foamed product with skin, characterized in that on the surface of the foamed product there is formed a skin composed of the reaction product of a linear urethane polymer, a polyol or an urethane prepolymer with an OH-terminal group compatible with the linear urethane polymer, and a blocked isocyanate; and the process for manufacturing such a product.