| 摘要 |
The bottom thread (1) is supplied from a bulk source (2) via a thread supply shaft (11) to the rotary hook arrangement (14). The hook drive shaft (15) is coaxial with the thread supply shaft (11). A flexible needle or a pneumatic threading system may be used to pass the thread through the passage (12) in the thread supply shaft (11). The system can be applied to industrial sewing machines. |
