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US 4,470,591 AGranted
Variable force document handling system
AssigneeXerox Corporation
InventorThomas Acquaviva
Life of this patent
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AssigneeXerox Corporation
InventorThomas Acquaviva
Estimating the term…
An improved document handler for transporting and registering document sheets over the platen of a copier, having first and second plural sets of document transport belts extending in the direction of document transport over the platen, with the first set of belts being transversely interdigitated with the second set of belts, with the first set of belts having a substantially higher frictional driving force on document sheets than the second set of belts other than in said registration area to predominantly control the transporting of a document sheet over the platen except in the registration area, and with the second set of belts being more closely positioned to the registration area of the platen than the first set of belts and driven at a slightly higher speed so as to predominantly control the transport of a document sheet in the registration area during its registration.
In a document handler for transporting, with a plural driven belt sheet transport, and registering document sheets over the platen of a copier, said registration being to an area adjacent one side of said platen, the improvement comprising:
A method of transporting document sheets onto and over a copier platen and into registration frictionally with plural frictional transport belts extending over the platen, and registering the document sheet in a copying position on the platen by frictionally driving the document sheet against a registration edge stop at or adjacent at least one edge of the platen with said frictional transport belts, comprising the steps of initially feeding a document sheet onto the platen primarily with a first plural set of higher frictional force transport belts which resist document sheet skewing and slipping, and then gradually transferring normal transport control of said document sheet to a second set of lower frictional force transport belts which allow greater document sheet skewing and slippage as the document sheet is transported over the platen by said belts towards said registration edge stop, wherein the belts of each said set extend substantially from the document entrance of said platen to said registration area.
Dependencies are inferred from the claim text.