Hat tipper

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Doffer \Doff"er\, n. (Mach.) A revolving cylinder, or a vibrating bar, with teeth, in a carding machine, which doffs, or strips off, the fiber from the cards. (Spinning) A worker who replaces full bobbins by empty ones on the throstle or ring frames.

Wikipedia Word definitions in Wikipedia
A doffer is someone who removes ("doffs") bobbins , pirns or spindles holding spun fiber such as cotton or wool from a spinning frame and replaces them with empty ones. Historically, spinners, doffers, and sweepers each had separate tasks that were required ...

Wiktionary Word definitions in Wiktionary
n. 1 (context textile manufacturing English) A revolving cylinder, or a vibrating bar with teeth, in a carding machine, which doffs, or strip off, the cotton or fiber from the cards. 2 A worker who replaces full bobbins by empty ones on the throstle or ...