Abstract: A process for producing a quinazolin-4-one compound having the formula: [wherein R1, R2, R3 and R4 each represents a group not participating in the below-mentioned reaction, and R1, R2, R3 and R4 can be combined together to form a ring] which comprises reacting an anthranilic acid derivative having the formula: [wherein R5 is a hydrogen atom or a hydrocarbyl group] with a formic acid derivative in the presence of an ammonium carboxylate.

Abstract: In a double heat exchanger with a condenser and a radiator, a flexible portion formed into a wave shape to be flexible is provided in a side plate at least at one side of connection portions of the side plate, connected to condenser header tanks and radiator header tanks. Further, a slit is provided to be recessed from one longitudinal end of the side plate to the flexible portion. Accordingly, a heat stress generated in condenser tubes and radiator tubes can be absorbed by the flexible portion even when a length of the slit is made shorter.

Abstract: A frame joining structure for electrical and electronic equipment housing cabinets, in which ends of frames are simplified in shape to dispense with complex cutting and which possesses excellent strength and waterproof property. Ends of outer side surfaces (4) of three mutually orthogonal frames (1a, 1b, 1c), which constitute a framework of a cabinet, are cut at two planes of ±45° relative to a plane defined by other two frames to be point-shaped. These ends are joined together directly or through a corner member (20) having the same configuration as that of the ends to constitute a firm corner portion.

Abstract: In a double heat exchanger with a condenser and a radiator, a flexible portion formed into a wave shape to be flexible is provided in a side plate at least at one side of connection portions of the side plate, connected to condenser header tanks and radiator header tanks. Further, a slit is provided to be recessed from one longitudinal end of the side plate to the flexible portion. Accordingly, a heat stress generated in condenser tubes and radiator tubes can be absorbed by the flexible portion even when a length of the slit is made shorter.

Abstract: A ratio (Nc/Lc), in a condenser core portion, of the number of louvers to a width of a condenser cooling fin, and a ratio (Nr/Lr), in a radiator core portion, of the number of louvers to a width of a radiator cooling fin satisfy that the ratio in one core portion, out of the condenser and the radiator core portions, a required radiation amount of which is larger than that of the other core portion is larger than the ratio in the other core portion. Thus, in the core portion having a small required radiation amount, the number of louvers relative to the width of the cooling fin is small thereby decreasing the heat transfer ratio. However, by this, the air flow resistance in this core portion decreases thereby increasing an air flow amount. Thus, the radiation amount of the core portion of which required radiation amount is large increases.

Abstract: A tire building apparatus includes a tire building drum for pulling and holding a tire component on the outer circumference thereof. The tire building drum is formed with a plurality of suction portions for pulling the tire component to the tire building drum, and a pitch of a pair of adjacent suction portions in the circumferential direction is set different from a pitch of another pair of adjacent suction portions in the circumferential direction of the tire building drum.

Abstract: A first cooling fin and a second cooing fin are separated to have a predetermine clearance, and a plurality of connecting portions for partly connecting the first and second cooling fins are formed. When the first and second cooling fins are unfolded, the length E of each the connecting portion in parallel with the longitudinal direction of the first and second cooling fins is equal to 5% or less of the length F between the adjacent connecting portions. Further, the first cooling fin is projected from the condenser tube toward the radiator tube side with a projection length Lc being in a range of 1.7 to 7.0 mm.

Abstract: A heat sensitive original sheet for stencil printing made of a laminate of a paper sheet and a biaxially oriented polyester film having a melting point of 150.degree. to 240.degree., a thickness of 0.2 to 3 .mu.m, an average refractive index of 1.570 to 1.578, a thermal shrinkage stress of 100 to 800 g/mm.sup.2 after being treated at 80.degree. C. for 10 seconds, a thermal shrinkage factor of 5 to 50% after being treated at 80.degree. C. for 10 minutes, a shrinkage factor of 15% or less after being treated in toluene at 25.degree. C. for 10 minutes, and a center line average surface roughness of 0.02 to 0.3 .mu.m, which original sheet is excellent in a perforation sensitivity, resistance to curling, and resolution and image density of a printed image.

Abstract: A shrinkable copolyester film having shrinkage of not less than 30% in the direction (main shrink direction) of either the machine direction or the transverse direction after 5 min treatment in an air oven at 100.degree. C., a shrinkage of not more than 20% in the other direction perpendicular to the main shrink direction after 5 min treatment in an air oven at 100.degree. C., an initial shrinkage stress (F.sub.0) of not more than 2000 g/mm.sup.2 in the main shrink direction during the course of 5 sec after dipped in a silicone oil of 75.degree. C., a shrinkage stress (F.sub.20) of not less than (F.sub.0 -100) g/mm.sup.2, after 20 sec dipping in a silicone oil at 75.degree. C., and a glass transition temperature of 35.degree. to 65.degree. C., is disclosed. The shrinkable copolyester film of the present invention is excellent in shrinkage properties, i.e., substantially free from wrinkles, distortion of film and uneven shrinkage, and is suitable for a shrinkable label for a PET bottle, etc.

Abstract: Disclosed in this invention is a shrinkable polyester film having a shrinkage of not less than 40% after 5-minute treatment in a 100.degree. C. air oven in one of the machine and transverse directions, and a shrinkage of not more than 15% after 5-minute treatment in a 100.degree. C. air oven and a maximum shrinkage stress of not more than 50 g/mm.sup.2 at 40.degree. to 100.degree. C. in the other direction. The shrinkable film of this invention has the excellent shrink characteristics and are substantially free from wrinkling, curling at the end and non-uniformity of shrinkage when the film is shrunk, so that it is suited for use as a label film and has a high industrial value.