Pleger, John J · Chicago : The Inland printer company · leaf 71
aken to prevent ruling blind. A machine which is freefrom vibration and a clamp containing an extra layer ofrubber between the jaws are all that are required forthe successful execution of the pen-over-pen system ofruling. It can be done in the ordinary rubber-lined clampif there are not too many… … ruling machine. It was at first intended to take ihe placeof the second beam, but since the advantages have becomeknown, many establishments retain the second beam,thus giving three devices to strike and lift. This consistsof two round shafts running across the machine overthe gate bar, the boxes…
Bookbinding
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from The Mason Machine Works, Taunton, Massachusetts, U.S.A., inventors and builders of cotton machinery : Founded 1842 ; Incorporated 1873 ; [Catalogue] (1898)](https://img.insideoutlibrary.com/img/200/ia-masonmachinework00maso-327-93.webp)
