VACUUM ROLL PLATEN TRANSPORT
Original Publication Date: 1983-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
A method and apparatus is disclosed for transporting and registering an original document 20 above the platen 9 without contacting the platen glass. A vacuum roll transport 10 in Figure 1 includes a vacuum roll 11 with an outer roll member 8 and a segmented vacuum chamber 12. The outer roll member 8 is driven by a servo motor 13 shown in Figure 2. Located and spaced above the platen glass 9, the vacuum roll 10 transports the document past a lead edge sensor 16 to a controlled stop for registration. The document lead edge is then clamped first to an angled clamp 15, followed by the rest of the sheet in a rolling motion so that the sheet does not buckle. The vacuum roll 10 continues to turn and the vacuum stays on but the sheet is pushed away from the roll by the clamp. The sheet is exited by raising the clamp 15, tacking the sheet to the vacuum roll again and driving the sheet out of the platen area.