摘要:
A board for an IC card includes a main body in the shape of a plate. A recess is formed in the main body for receiving and adhering a component therein. The recess includes a bottom wall integrated as one body with the main body, and an adhesion section for adhering the component. A wall of the adhesion section is an uneven surface. Ribs may be provided which extend from an inner side of the recess to contact the component.
摘要:
A plate for an IC card having recesses for mounting components is formed by injection molding of plastics. First, a mold for forming recesses for mounting components is formed to have a slide core. After molten resin is filled in a cavity, the slide core is forced to penetrate into the cavity. Thus, the molten resin is removed by the slide core so as to form the recesses and walls. Because the resin has been filled beforehand, even if the wall is thin, the filling process is carried out normally, and the walls can be formed without increasing an injection pressure.
摘要:
A powder for sintering is prepared by the wet mixing of a finely and uniformly divided alumina powder of high purity having a primary particle diameter not exceeding 0.15 micron and an average particle diameter not exceeding 0.3 micron, and a partially stabilized zirconia powder of high purity having an average particle diameter not exceeding 0.3 micron. After granulation and molding, the mixed powder is sintered at a temperature of 1300.degree. C. to 1500.degree. C. to make a sintered body having an average grain size not exceeding 0.7 micron.
摘要:
A magnetic recording tape cartridge comprising a pair of tape reels each having a bottom flange with a plurality of engaging teeth on the peripheral edge of the bottom flange and a tape reel stopping means for engagement of one of the engaging teeth of the tape reel, the tape reel stopping means being biassed by a resilient plate spring to prevent undesired rotation of the tape reel.