doffer

Meanings

1. In a carding machine, a device such as a revolving cylinder or a vibrating bar with teeth, that doffs, that is to say strips off, the carded cotton or other fiber from the cards; or a hand tool for the same function in smaller machines or in manual carding.
2. A worker who replaces full bobbins by empty ones on the throstle or ring frames. The job was often done by children.

Etymology

From doff + -er.