| 摘要 |
The invention relates to three-dimensional hollow channel lettering integrally formed from a single block of millable material and a method of manufacturing said lettering. The method includes the steps of: (i) selecting a block of material having a depth corresponding to that of the desired lettering; (ii) milling through the material to delineate exterior return surfaces 22 to produce an exterior profile matching that of the desired lettering; and (iii) milling out further material to define interior return surfaces. The milling process may be automated and may be controlled to define inwardly directed flanges extending from, and integral with, the interior of the return surfaces. Such flanges can be used to retain a transparent or translucent lens member which may be illuminated from within the channel lettering by known illumination devices. |
