Historical information
"New Yarn Knopping Motion" - Wm. Whiteley & Sons Ltd, Textile Machinists, Lockwood, Huddersfield, 1927. Article reprinted from "The Textile Manufacturer" advertising an attachment for Twisting frames which will add knops to threads.
Physical description
Booklet produced in 1927 by W. Whiteley and Sons Ltd for their new yarn knopping motion to attach to twisting frames to create knops in yarn.