DOCUMENT HANDLING SYSTEM
Original Publication Date: 1979-Dec-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
In a friction document handling system (DHS) using a belt to transport a document onto and of€ of the platen by frictional contact of the belt with the document, additional control of the position of the belt relative to the platen during this operation can successfully reduce the size of the motor required to drive the DHS and reduce damage to the documents being transported. In Figure 1, a document belt 10 is driven clockwise around drive roll 13 and idler roll 14 over platen 12 having a registration edge 15 at the output end of the platen. A document 18 is fed into the space between the platen 12 and document belt 10 by input pinch rolls 16 and 17. An input backup roll 19 positioned just inside the input station and on the side of the belt opposite the platen supplies a normal force to the document when fed onto the platen to help maintain the document in control in going from the input pinch rolls to the registration edge 15. For that interval of time when the belt is in direct contact with the platen glass, a high torque load on the drive motor of the document handler is required. This occurs when the belt is running against the platen glass prior to the document entering the platen area.