a manifolding device consisting of a kind of pen with a small toothed wheel at the end that cuts minute holes in a specially prepared paper stretched over a smooth surface: used to produce a stencil from which copies are printed.

What do you mean by Cyclostyle?

: a machine for making multiple copies that utilizes a stencil cut by a graver whose tip is a small rowel.

Who invented Cyclostyling machine?

It was invented in the later 19th century by David Gestetner, who named it "cyclostyle" after a drawing tool he used.