| 摘要 |
<p>Solid needle is run up and down on a sled to pass through stacks of material. A thread is reeled off a stock spool in tension, through an inking bath, wiped to clear excess ink and so through the needle eye marking the material and then reeled back onto a take-up spool on the other end of the machine. The needle has guides to keep the thread parallel for marking, and the take-up spool is motor powered through a friction clutch with limit switch to cut the motor out when no thread slack is available for reeling in. The sled can be hand powered, electromotorised or spring assisted. Stops on sled and machine work together to limit needle penetration.</p> |
