Adaptive decurler for selective decurling of localized image are

Details Adaptive decurler for selective decurling of localized image are Adaptive decurler for selective decurling of localized image are

1994-10-11

1996-05-21

Brase, Sandra L.

Photocopying

Contact printing

Light boxes

162271, 355285, G03G 2100

Patent

active

055194818

ABSTRACT:
An apparatus for adaptive localized sheet decurling in an electrophotographic printing machine. A segmented decurling device forms a drive nip with an elastically deformable surfaced roll. A plurality of sensors are provided to determine the basis weight of the copy sheet, the density of the image being transferred to the copy sheet and fused thereon, the relative humidity of the machine environment, the process speed of the print engine, and any other relevant parameters. Signals indicative of these parameters are generated and sent to the machine controller which processes these signals to determine the degree of curl expected in a sheet. Based on the degree of of curl for each sheet section corresponding to a decurler segment, the decurler segment is actuated to a setting which should provide the proper amount of mechanical decurling force. Each segment is activated only for the duration deemed necessary to decurl the imaged sheet portion corresponding thereto.

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