| 摘要 |
<p>This is an anti-theft device for exhibiting posters which has front and rear extruded parts connected pivotably together, defining a member in the form of a frame. The front part defines a member in the general shape of a U which has smooth surfaces and rounded, unthreaded corners, and the front and rear parts are loaded against each other by means of spring compression, resulting in a poster frame which cannot be seized with sufficient frictional force in order to be opened. An opening tool, with a lever arm and a flat wedge member, which is inclined and in a single piece, can be applied to the front part of the frame in order to open the poster- display device.</p> |
