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| Number | Title | Issue Date |
| 4984526 | Thread chain guiding device for overedge sewing machines A thread chain guiding device provides a needle-thread-guide plate which extends underneath a throat plate by energizing a solenoid as needed. Thus, the needle-thread-guide plate pushes the needle threads twined around a lower looper outwardly away such t... | 01/15/1991 |
| 4777892 | Thread chain sewing method and device for two-needle overlock sewing machine A thread chain is prevented from hanging at an inner chain-off finger when it is turned back or rotated to the operator's side for holding and cutting. A needle thread, positioned at the front side of a lower looper, is guided by a needle thread restricti... | 10/18/1988 |
| 4774900 | Apparatus for backtacking thread chain for use with a two-needle overedge sewing machine In a two-needle overedge sewing machine, a thread chain guide recess is formed for positioning the thread chain at a given position on the throat plate so that the thread chain is spaced apart from the outer needle descending point. The thread chain guide... | 10/04/1988 |
| 4726308 | Thread tension control device for overedge sewing machines A thread tension control device for overedging sewing machines wherein each needle thread tension controller and each looper thread tension controller provide two springs designed to clamp two tension discs wherethrough a thread is passed. A slide plate, ... | 02/23/1988 |
