1. Field of the Invention
This invention primarily relates to a guiding means for an endless apron provided in the drafting part of a spinning frame, and further, to a guiding means for an endless belt in the feeding mechanism of, for example, a printing machine, duplicator, precision packaging machine, film processor, and the like.
2. Description of the Prior Art
FIG. 1 is an illustration showing a typical apron zone of a long apron type drafting device which comprises such components as a bottom roller BR and a top roller TR, both being disposed on a roller stand RS which supports a roller, a cradle CR, a tensor bar TB, a tension guide TG pressed by a tension lever TL in the direction of the arrow, a top apron TA and a bottom apron BA, in addition to a weighting arm WA.
However, the above said apron guiding device in respect of performance and operability for tightening, balancing and guiding the bottom apron, as well as performance of the tensor bar itself and operability in maintenance thereof, has not proved satisfactory.