| 摘要 |
The grooves of a grooved pass belt are formed with an improved configuration which reduces groove closure under pressure and which reduces cracking and tearing of the belt. The improved groove configuration consists of a curved bottom (20) and two upwardly diverging side walls (22). In a first embodiment the bottom wall is semi- circular and has a diameter (D) which is equal to about one half of the width (W) of the groove opening. The upwardly diverging side walls (2 2) preferably include radiused upper edges (24). The side walls (22) preferably have an angle of divergence between about five degrees and about fifteen degrees from a vertical plane. In a second embodiment, the bottom of the groove is substantially flat, and the bottom comers are radiused to provide a smooth transition between the flat bottom and the upwardly diverging side walls. |
