Introduction of TF series No.3
File No.014
FEARURES of TECHNOLOGY
The features of TF series for hook making include
1. Various hook shapes such as German, English, etc.
2. Hook ends without straight portions
3. Same shapes of first and second hooks by same tool
4. Lifting-up Hooks without gaps between first and second body coil.
These features are difficult to be achieved by torsion spring machines.
