Duplicating machine

Claim 1

IN A DUPLICATING MACHINE HAVING A ROTATED DRUM ADAPTED TO CARRY A STENCIL FOR MARKING SUCCESSIVE SHEETS AS THE LATTER ARE FED BY A RECIPROCATED SHEET FEEDING MEMBER FROM A STACK OF THE SHEETS AT A FEEDING STATION ALONG A PATH THAT INCLUDES A PORTION OF THE SURFACE OF THE DRUM TO A DISCHARGE STATION; THE COMBINATON OF AIR PUMPING MEANS OPERATIVE TO SUPPLY AIR UNDER PRESSURE, MECHANICAL LINKAGE MEANS CONNECTING SAID SHEET FEEDING MEMBER WITH SAID AIR PUMPING MEANS FOR OPERATING THE LATTER IN RESPONSE TO RECIPROCATION OF THE SHEET FEEDING MEMBER, SELECTOR VALVE MEANS HAVING AN INLET CONNECTED WITH SAID AIR PUMPING MEANS FOR RECEIVING AIR UNDER PRESSURE FROM THE LATTER AND A PLURALITY OF OUTLETS, SAID VALVE MEANS BEING ACTUABLE TO SELECTIVELY COMMUNICATE SAID OUTLETS WITH SAID INLET, FIRST, SECOND AND THIRD NOZZLE MEANS LOCATED TO DIRECT STREAMS OF AIR AGAINST THE SUCCESSIVE SHEETS AT SAID FEEDING STATION, AT SAID PORTION OF THE SURFACE OF THE DRUM AND AT SAID DISCHARGE STATION, RESPECTIVELY, CONDUIT MEANS CONNECTING SAID FIRST, SECOND AND THIRD NOZZLE MEANS WITH RESPECTIVE OUTLETS OF SAID SELECTOR VALVE MEANS, AND A CONTAINER FOR POWDERY MATERIAL INTERPOSED IN THE CONDUIT MEANS BETWEEN SAID VALVE MEANS AND SAID THIRD NOZZLE MEANS SO THAT AIR STREAMING FROM THE LATTER ENTRAINS POWDERY MATERIAL FROM SAID CONTAINER.