With the advent of industrial mechanisation, inking was carried out by rollers that passed over the face of the type, then moved out of the way onto an ink plate to pick up a fresh film of ink for the next sheet. Meanwhile, a sheet of paper slid against a hinged platen (see image), which then rapidly pressed onto the type and swung back again as the sheet was removed and the next sheet inserted. As the fresh sheet of paper replaced the printed paper, the now freshly inked rollers ran over the type again. Fully automated 20th-century presses, such as the Kluge and "Original" Heidelberg Platen (the "Windmill"), incorporated pneumatic sheet feed and delivery.