Abstract: The cartridge of the present invention is capable of improving both of the heating efficiency and the flowing efficiency. The cartridge is capable of being detachably attached to a fluid heating device including a heater for heating a fluid to be transfused. In the cartridge, the fluid passes through a zigzag-shaped fluid path. A contact section is capable of contacting the heater and is made flat. A sectional shape of the zigzag-shaped fluid path, which is perpendicular to a flowing direction of the fluid, is formed into a polygonal shape. The fluid heating device of the present invention included the cartridge.

Abstract: Disclosed is an optical pickup device comprising a light source for irradiating a light beam onto an object from a light source, a half mirror for introducing said light beam reflected by the object to an optical detector; and a wedge-shaped photosensitive element, disposed between said half mirror and said optical detector, for cancelling out a coma produced by said half mirror.

Abstract: An engineering plastic composition with excellent flowability, heat stability, and desirable mechanical properties is provided. The composition contains an engineering plastic material and an aliphatic polyester.

Abstract: A polyester is provided that comprises as main monomer components thereof a dicarboxylic acid and a diol, including a p-quaterphenyl derivative of specific formula. The use of appropriate kinds of dicarboxylic acid for the polyester makes it possible to obtain a thermoplastic elastomer or an engineering platic material (i.e., liquid-crystal polymer).

Abstract: A polyester is provided that comprises as main monomer components thereof a dicarboxylic acid and a diol, including a p-quaterphenyl derivative of specific formula. The use of appropriate kinds of dicarboxylic acid for the polyester makes it possible to obtain a thermoplastic elastomer or an engineering plastic material (i.e., liquid-crystal polymer).

Abstract: An engineering plastic composition with excellent flowability, heat stability, and desirable mechanical properties is provided. The composition comprises an engineering plastic material and at least one p-quaterphenyl derivative of specific formula.

Abstract: A technical object of this invention is to hold down an inflation of an air cushioned portion of an air filled product required to have a high pneumatic pressure of the air chamber with extremely high load F. For the purpose, in a core structure according to this invention in the middle portions of an upper side leather cloth sheet a pair of core members (4) of a double layer structure (1', 2') identical with the leather cloth sheets (1, 2) is provided, and each core member (4) is fused to each of the upper side and lower side leather cloth sheets at both end portion (5), and middle portions (6) of a pair of core members (4) are sewn with a yarn (7) to be coupled. The core structure according to this invention is particularly suitable for holding down the inflation of bouyance adjusting apparatus for scuba diving and the like.