| 摘要 |
A readily modifiable modular sign apparatus is especially useful for use as easily changed advertisement media such as in department stores and retail stores. In one embodiment, the apparatus comprises a preferably translucent substrate or mounting board which is preferably planar and has a front surface and a back surface. Precisely positioned holes are prepared at selected locations. These holes are formed to be aligned with thin metal shims which are affixed on the back surface of the mounting board and receive cylindrical magnets on the front surface. The magnets are attached directly to the rear of printed sheets, each of which may have wording or pictorial information or both. The magnets contact the metal shims through the mounting board holes, and are held firmly in position by virtue of both the magnetic attractive force and the shape of the walls of the mounting board holes. The printed sheets may be provided with indicia carriers to permit personnel to change just numerical data such as prices without the requirement to replace the entire printed sheet. In the preferred embodiment of the present invention, such indicia carriers are affixed directly to the front surface of the printed sheets by a separate magnetic structure that provides easy access to the numerical indicia.
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