| 摘要 |
<p>Two racks of parallel spaced bars (28, 30) are supported for oscillatory motion from overhead drive shafts (52, 66) having eccentric cam surfaces (60, 62). A first drive shaft (52) is driven by a belt (50) connected to a motor (44), and a second shaft (66) is connected to the first shaft (52) for synchronized movement by a rigid link (68). The bars (28, 30) are clamped to bar support beams (78, 79) without the need for bolts to extend through individual bars. The support beams are connected by side frames (76, 82) to the eccentric cam surfaces (60, 62).</p> |
