Dandy-roller

The above method of finishing the marks or designs applies only where the device is to be sewn on to the mould or dandy-roller with wire ; but when solder is used, the metal device may — after having been cut, as before mentioned, and cleared from the other parts of the cut plate, card-board, or veneer—be at once affixed by solder to the mould or dandy-roller;

Source: wiktionary

In the early 19th century the dandy-roller was invented to impart watermarks on machine-made paper.

Source: wiktionary

The dandy-roller here takes the place of thhe length and breadth of the wire forming a hand-mould, the chief difference eing that the length is "endless."

Source: wiktionary