| 摘要 |
<p>PURPOSE:To realize a sufficient crystal effect without increase in thickness, by extending a little the connected edge of a first wall face as it is and connecting the connected edge of a second wall face to the extended edge at the ridgeline to form a protruded ridgeline. CONSTITUTION:The peripheral wall of the bottom 10 defining a tapered cylindrical wall forms a second wall 3 and continues to a flat wall of the shell 7 at the upper half thereof and further the flat wall, cut at a slant, forms a first wall 2. The connected edge of the first wall 2 to the second wall 3 is extended a little and connected to a ridge wall 4a bent reversely with a small radius of curvature between the connected edges of the first and second walls. As protruded ridge 4 forming a boundary between walls 2, 3 projects much, the corner formed by the protruded ridge 4 appears sharp. Thereby, the difference of refractive indexes of transmitted light between the walls 2, 3 is emphasized to realize its crystal effect.</p> |
