Author: jhoyla
Date: 2015-03-11 16:22
@Mike:
Quote:
I get what you are saying, but, theoretically, a thread in static tension has equal and opposite forces pulling it in both directions. As long as the thread is static along the line of tension--not slipping--it shouldn't matter, the main force on the cane is perpendicular to the path of the thread, pushing the cane against the staple.
I don't argue with you that the thread's primary purpose is to conform and fix the cane against the staple.
While wrapping, different rules apply. This is because as you wrap and tighten the thread, the thread moves against the cane and pulls it in the direction of wrapping. This is an additional force that with the correct minuscule overlap, pushes the top edge of the front blade more tightly against, and fractionally under, the top edge of the rear blade. 180 degrees round and the process is repeated for the lower edge of the rear blade against the front blade.
The "lock in" of the blades is then made permanent with the completion of the wrap down the staple.
If there is an overlap in the wrong direction, while wrapping and tightening the thread the blades would slip further and further apart instead of locking together. This is quite easy to demonstrate.
J.
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