| 摘要 |
A hold-down element for a rotary feeder has a curved elongated member for continuously contacting an article during rotation of a rotary head. The curvature of the hold-down element is selected so that the distance from the elongated member to the rotary head increases from the point of initial contact to the final contact point on the elongated member. The hold-down element preferably maintains contact for at least 20 DEG of rotation of the rotary head, and thus maintains contact with the article for an extended period of time. The hold-down element is attached to a vacuum shaft on the rotary head, and is prevented from rotating relative to the vacuum shaft by a keyway on the hold-down element and a key on the vacuum shaft. The hold-down element, however, is permitted to travel transversely along a longitudinal axis of the vacuum shaft in order to accommodate different shaped articles. |
