| 摘要 |
<p>In this device, a rocker lever (70) carrying a presser foot (71) can be guided, by a suitable actuating device, from a low position, in which the foot (71) is laid onto the material to be sewn, into a high position distant from this. …<??>For this purpose, the lever (70) is equipped with rolling members (70c) resting on guide ramps (72a), these members and/or these ramps having such a profile that, during the displacement of the presser foot between its two positions, this foot always follows a vertical path.</p> |
