Agile lateral and shew sheet registration apparatus and method

Details Agile lateral and shew sheet registration apparatus and method Agile lateral and shew sheet registration apparatus and method

1996-06-26

1997-12-16

Skaggs, H. Grant

Sheet feeding or delivering

Feeding

With means to align sheet

271250, 27126502, B65H 702

Patent

active

056976089

ABSTRACT:
An apparatus and method for registering and deskewing a sheet along a paper path. A pair of independently driven selectively actuable nips are used to drive a sheet transverse to a paper path direction until the edge of a sheet is registered laterally and in skew. The transverse nips are then deactivated and a drive nip moves the sheet in a process direction along the paper path. A first transport sensor senses the lead edge of a sheet, a second sensor is used to also detect the lead edge of a sheet within a certain distance from the detection by the first sensor. The transport drive nip can then be adjusted based on the transport time between the first transport sensor and the second transport sensor so that the sheet arrives at a registration sensor at the prescribed time. This apparatus and method allows the use of simple point type sensors as opposed to more complex and expensive sensor arrays.

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