Moving band publicity unit with supporting and tensioning rollers at either end of housing - has guide rollers with flared ends adjacent to return rollers for better tension

摘要

The unit consists of a housing (1) with supporting rollers (2, 4) for the moving band (10), connected to drives (6, 8, 19, 20) to move the band from one end of the housing to the other, and tensioners (14, 16, 17, 18) for the band. The unit has first and second guide bars (41, 42) with their axes parallel to those of the supporting rollers and situated adjacent to return rollers (11, 12) at the two ends of the housing. The guide bars have ends (45, 46) which are of greater diameter than their central portions and against which the edges (47, 48) of the band rub as it travels across the housing, and the end and central sections of the guide bars are joined by smoothly curved surfaces. ADVANTAGE - Improved band tension during operation.