planker
(ˈplæŋkə(r))
[f. plank v. + -er1.]
A workman who planks or kneads hat-bodies in the process of felting them.
| 1902 Brit. Med. Jrnl. 15 Feb. 378/1 In hand-planking the ‘form’ is dipped in boiling water acidulated with vitriol, and then folded and vigorously kneaded by the planker's hand. |