| 摘要 |
<p>A roller assembly for bidirectionally dispensing and compacting a strip of a material onto a surface without requiring the roller assembly to rotate 180° to dispense the material in the reverse direction. The roller assembly comprises a first guide element, a second guide element, a third guide element, and a compacting roller. When the first guide element is in a first position, the strip of the material is fed to the second guide element. When the first guide element is in a second position, the strip of the material is fed to the third guide element. The compacting roller is malleable and substantially crowned around an outer circumferential surface of the compacting roller to provide even compaction to the strip of the material.</p> |
