| 摘要 |
In apparatus for damping noise in bar-feeding devices of automatic screw-cutting machines a group of rollers is composed of an upper pair of laterally spaced upright rollers and a lower pair of laterally spaced upright rollers, with an endless belt extending around each pair and resilient means urging the rollers laterally away from each other to maintain the belts taut. The lower length of the upper belt and the upper length of the lower belt are engageable with the top and bottom of a rotating and axially moving bar between them. |
