Patent ID: 7267337
Filing Date: 2007-09-11
Classification: B65H

Abstract:
1. A method for correcting sheet curl in a paper feeder having a tiltable tray, comprising: detecting a first distance above a surface of a stack of papers on the tiltable tray to be fed into a printing device at a first location above the stack of papers; detecting a second distance above the surface of the stack of papers on the tiltable tray to be fed into the printing device at a second location above the stack; detecting a third distance above the surface of the stack of papers to be fed into the printing device at a third location above the stack, wherein the third location is nearer to a lead edge of the stack than the first or second locations, and wherein the second and third distances are detected by a first sensor; and tilting the tray based upon the first, second, and third distances detected.