| 摘要 |
There is disclosed a hand-held labeler having a feed wheel for advancing a label-carrying web. The feed wheel is driven through a pawl and ratchet mechanism. The pawl and ratchet mechanism includes a pawl member and a ratchet wheel. The pawl member is slidably mounted for axial movement relative to the ratchet wheel. The ratchet wheel and the feed wheel are clutched for rotation as a unit during use, but they can be unclutched to effect relative adjustment of the ratchet wheel and the feed wheel. When the clutch is unclutched an additional clutch clutches the pawl member and the ratchet wheel to prevent movement of the ratchet wheel in either direction while the position of the feed wheel is adjusted.
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