摘要:
A semiconductor package socket comprises an insulating support substrate, pin contacts arranged in a constant-pitch lattice-array and which are attached in a manner that permits advance or retreat in a direction which is almost perpendicular to a main surface of the support substrate, a pin contact movement driving mechanism which advances or retreats the pin contacts en bloc, and a guide frame which has spaces to accommodate said pin contacts, which is freely detachable and which can cover areas other than those required by the pin contacts.
摘要:
In the production of polyethylene naphthalate of the present invention, the esterification reaction between naphthalenedicarboxylic acid and ethylene glycol is conducted while causing water to be present in a reaction system from a start of reaction, in the presence of at least one catalyst selected from the group consisting of nitric, carboxylic, phosphoric and hydrogenphosphoric acid metal salts and alkyl amines according to necessity, to thereby attain an esterification ratio of 45 to 80%, so that a liquid mixture of naphthalenedicarboxylic acid esterification reaction products containing naphthalenedicarboxylic acid, carboxyl-hydroxyethoxycarbonylnaphthalene and bis(hydroxyethoxycarbonyl)naphthalene is obtained. Subsequently, a crystallized reaction product is separated from this liquid mixture to thereby obtain a mixture of esterification reaction products. Thereafter, this mixture having ethylene glycol added thereto according to necessity is subjected to polycondensation. The polyethylene naphthalate obtained by the process of the present application ensures a low content of naphthalenedicarboxylic acid esters each having diethylene glycol skeleton therein, thereby having excellent quality, for example, in appearance.
摘要:
A window molding for automobiles, which is installed around the periphery of a windshield, including a leg and a head. The head is formed to permit the creation of two different water guide portions extending along the molding, one that will function along the roof line and another along the side edge of the windshield. The side water guide portion prevents water from going from the windshield to the side windows. The roof line water guide portion opens toward the window frame and prevents water from flowing from the roof onto the windshield.
摘要:
A thin IC card which is highly reliable, simple in construction and structure, to which a function section relating to main information processing can be easily attached, and which has improved portability, and a method for producing it are disclosed. This thin IC card is characterized by including a plate type IC module in which a semiconductor device having at least memory function and CPU function has its one side sealed or molded with a resin, and flat type externally connecting terminals have their one end connected to the input/output terminals of the semiconductor device and the other end led and exposed to a non-resin sealed or molded side, and a card-like support which has a fitting section for fitting the plate type IC module with the surface of the externally connecting terminals of the plate type IC module exposed to be substantially flush with the surface of the card, a required circuit wiring, an antenna for sending and receiving a signal without contacting, and if necessary an oscillator for specifying a frequency and a power supply battery.
摘要:
A continuous casting method includes the steps of continuously supplying molten metal into a mold through at least one feed nozzle connected to the mold through a break ring, with the feed nozzle, the mold and the break ring forming at least a portion of a continuous casting apparatus, and intermittently withdrawing a cast piece formed from the molten metal in the mold thereby creating pressure in a space formed at a connecting point between the break ring, the mold and the cast piece as a result of the withdrawal from the mold. A shield means is placed to seal-off space between the at least one feed nozzle, and the mold to prevent entry of gas into the continuous casting apparatus and the pressure is reduced in the sealed-off space to thereby eliminate a pressure differential between the pressure in the sealed-off space and the pressure created in the space formed at the connecting point between the break ring, the mold and the cast piece during the intermittent withdrawal from the mold.
摘要:
An image-receiving sheet for thermal transfer printing comprising a substrate and an image-receiving layer disposed on said substrate, characterized in that said image-receiving layer contains thermoplastic resin fine particle aggregates. And an image-receiving sheet comprising a substrate, an intermediate layer disposed on said substrate, and an image-receiving layer disposed on said intermediate layer, characterized in that at least said intermediate layer contains thermoplastic resin fine particle aggregates.
摘要:
In a method and apparatus for withdrawing a strand in a horizontal continuous casting installation, the strand is withdrawn from a mold by a predetermined stroke and then retracted by a smaller stroke corresponding to shrinkage of the strand. This cycle of withdrawal and retraction is repeated intermittently. A strand withdrawing and retracting characteristic of a cycle is set in a control unit, and pinch rolls for withdrawing and retracting the strand are controlled based on the set characteristic. Actual withdrawing and retracting strokes of the strand are detected by a detecting device and the detected signal is compared with the set characteristic to produce an instruction signal which is fed back to the pinch rolls, so that the positional accuracy of the strand and the quality of the strand are improved.
摘要:
In a mechanical ignition type gas generator including a housing which consists of an upper outer shell container (diffuser) and a lower outer shell container (closure) fitted to each other in such a manner as to define an annular space for storing therein a gas generating agent, a priming charge, a cooling material and a filter, and in which said closure has a cylindrical space capable of fitting to, and storing, a cylindrical mechanical igniter on its lower surface and a plurality of caps ignited by an ignition pin of said igniter are disposed on the top wall of said space, a hole for communicating a priming charge room with the front surface of said caps is disposed inside said closure of said housing besides a cap hole for communicating the back surface of said caps with said priming charge room so as to prevent delayed ignition of said caps.
摘要:
A panel shutter device constructed in such a way that in the process of continuously moving each panel by a lifting shift along guides rails and a lateral shift along a housing rail, a guide rotary member engages or disengages a guide shaft projecting from the side of the panel opposite the driven side. At the time of descending of the shutter curtain, in order to prevent finger pinching as each panel is placed on the succeeding panels sequentially, each panel can be lifted or descended without causing a gap between panels of the shutter curtain by providing the support member suspended by a pivotable connecting chain.
摘要:
A GaAs epitaxial layer is formed on a semi-insulative GaAs substrate by use of a crystal growth technique which allows control on the order of atomic layer level. A metal film is formed on the GaAs epitaxial layer by use of the same crystal growth technique. Ions are implanted in source and drain high-concentration layer-forming regions, through the metal film, and are activated.