| 摘要 |
<p>A method and apparatus for feeding and tensioning strap (22) in a strapping machine (20) is provided. The apparatus includes a rotatable feed wheel (36) and means (40, 42, 44) for rotating the feed wheel, a first pinch roll (38) associated with the feed wheel (36), and a first strap pressing means (48) for moving the pinch roll (38) between a strap engaging position and a position wherein the strap is not engaged. Also provided is a rotatable take-up wheel (62) and means (66,68,70) for rotating the take-up wheel (62) in a direction opposite to the feed wheel rotation. A second pinch roll (64) is provided adjacent the take-up wheel (62) and is movable between a first position for engaging the strap and a second position wherein the strap not engaged. A high tension member (80) is mounted for rotation between the feed wheel (36) and take-up wheel (62). The high tension member (80) defines a slot (82) for accommodating the strap and defines a strap engaging surface (84) on the periphery of the high tension member (80) at an end of the slot (82). Means (80, 86, 90, 92, 94, 98, 96) are provided for rotating the high tension member (80) to engage the strap and apply high tension to the strap.</p> |
