| 摘要 |
A sheet metal folding tool comprising a guide tongue (2) in space parallel relationship to a folding tongue (1) at lest partially in register therewith. The internal faces of such tongues defining a channel therebetween, such tongues being adapted to be urged by percussion down either side of an intended fold line upon a piece of sheet metal thereby folding a peripheral portion of such sheet metal around the corresponding frame and thereby affixing such sheet metal thereto. |
