The next important development for BTM was the patented TOG-L-LOC sheet metal joining system. Later, after the introduction of the toggle press Mr. Sawdon developed TOG-L-LOC as an alternative to spot welding, riveting and other conventional methods of joining.
TOG-L-LOC offers numerous advantages; No rivets or fasteners, no secondary operations, reduced and simplified maintenance, no transformers or cooling lines, no heat buildup, joining of dissimilar metals and coated metals, leakproof joints, high repeatability, non-destructive checking, long tool life and more.
Numerous private concerns have subjected TOG-L-LOC to some rigorous testing programs with some impressive results, particularly in the areas of vibration resistance and consistency.
The joint is produced in a single stroke, by simple punch and die tooling fitted to BTM presses or most other conventional presses.