Traffic signboard - has upright frame with front and rear panels perforated to same pattern and spaced apart

摘要

The patterned board, for use in advertising, as a traffic signboard etc., can be suspended or free-standing. It comprises an upright frame (4) with perforated front and rear panels spaced apart, each with perforations in the same pattern (7). The perforations can be in three sets of parallel rows, the rows including angles of 120 deg., and one of them being horizontal.