Turns out, that is the older form of the term. I was embarrassed when I learned that.
It was invented to keep water out of ammunition boxes; "duck" might have mean "waterproof," or might have referred to the woven cloth reinforcement.
I still say, and write, "duct tape."
Flue tape is nice stuff!
"the qualities of these bacteria, like the heat of the sun, electricity, or the qualities of metals, are part of the storehouse of knowledge of all men. They are manifestations of the laws of nature, free to all men and reserved exclusively to none." SCOTUS, Funk Bros. Seed Co. v. Kale Inoculant Co.
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Dave Burton's Boot Adventures at Wheaton Labs and Basecamp