Abstract: The present invention relates to a novel sealing glass composition, in particular, one which comprises solid PbO--ZnO--B.sub.2 O.sub.3 glass and natural garnet as a filler component. This composition has the advantage that thermal strain does not occur at the interface between the crystalline glass and filler because of the excellent chemical affinity. This prevents cracks from propagating at the interface between the main glass and filler, thereby improving the mechanical strength of the glass.

Abstract: The present invention relates to low temperature sealing glass compositions using ceramic composite filler useful for sealing alumina ceramic package, in particular, to compositions for hermetic-sealing cap and base of alumina package which consists of a solid PbO-B.sub.2 O.sub.3 glass powder and a filler selected from zinc zirconium silicate composite or magnesium aluminum zirconium silicate composite as a low thermal expansion ceramic composite. The used composite filler composes of zircon and willemite crystal phase or zircon and cordierite crystal phase uniformly mixed on the filler and has the low thermal expansion coefficient of 20.degree..about.40.degree..times.10.sup.-7 /.degree.C.

Abstract: A cassette front loading apparatus for DAT of tray type which loads and unloads a cassette by moving horizontally and vertically is disclosed. Without utilizing separately the loading motor and the lift and drop motor for moving the cassette horizontally and lifting and dropping the same, with existing capstan motor only, the loading and unloading operation including the horizontal and vertical movement, slider opening movement, cassette take out movement and location detecting operation and the like are executed. Accordingly, the loading motor and the lift and drop motor and the number of parts are deleted, consequently all of the mechanism is very much simplified, therefore the preciseness and the durability are expected to be enhanced. Since all of the mechanism is simplified, the cost of the product is decreased and the assembling process became easier simultaneously the productivity is remarkably increased.

Abstract: A cassette front loading apparatus of a digital audio tape recorders for tray type which loads and unloads a cassette by moving horizontally and vertically. A single capstan motor is used for loading and for the lifting and dropping and for moving the cassette horizontally and lifting and dropping the same, to effect the loading and unloading operation including the horizontal and vertical movement, slider opening movement, cassette take out movement and location detecting operation and the like. Consequently all of the mechanism is very much simplified whereby the preciseness and the durability are enhanced.