Patent ID: 6557466
Filing Date: 2003-05-06
Classification: B65H

Abstract:
A crease plow folder for folding a sheet, comprising:a) non-twisting, holding and transporting means for holding and transporting the sheet in a non-twisting fashion during folding of the sheet, wherein said non-twisting, holding and transporting means comprises: i) a plurality of drive rollers, wherein each of said plurality of drive rollers rotates at essentially the same constant rotational speed and ii) a plurality of idler rollers, wherein said plurality of drive rollers are paired with said plurality of idler rollers, thereby minimizing twisting forces on the sheet; b) rolling fold means for producing a rolling fold at a desired location in the sheet, wherein said rolling fold means comprises: i) a centerline-twisted bar and ii) a paired pressure bar positioned adjacent said pluralities of drive and idler rollers; c) creasing means for converting the rolling fold into a creased fold; and d) controller means for monitoring the progress of the sheet through the plow folder.