| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a file that can conveniently file documents, photographs, and the like, from which things stored in the file can be clearly seen from the front side but cannot be clearly seen from the lateral side, that is, a so-called narrow viewing angle file. <P>SOLUTION: A file is formed to be able to store things inside by piling up a front sheet and a back sheet, which are made of transparent or translucent synthetic resin, and closing one side end, the one side end and the bottom end, or both the side ends and the bottom end of each of them. In the file, a prism part in which many elongated protrusions substantially triangular in cross section are formed in parallel and contact with each other at the bottom parts of adjacent protrusions is provided at least on a part of a surface of the front sheet. <P>COPYRIGHT: (C)2013,JPO&INPIT |
