Patent ID: 8434761
Filing Date: 2013-05-07
Classification: B65H,G03G

Abstract:
1. A sheet transportation apparatus comprising: a plurality of adjacent rollers, each of said rollers comprising a rounded external surface and an axis about which said external surface rotates, said external surface of said rollers being spaced from each other by inter-roller spaces; and a fan positioned on a first side of said rollers, said fan drawing air through said inter-roller spaces to create a vacuum force on a second side of said rollers, said vacuum force maintaining sheets of media in contact with said second side of said rollers, said external surface of each of said rollers comprising a plurality of first regions having a first diameter and a plurality of second regions having a second diameter different than said first diameter, said first regions comprising angled grooves in said rollers that are at an obtuse angle to said axis, said adjacent rollers comprising said angled grooves positioned at alternating obtuse angles from adjacent roller to adjacent roller, said first regions and said second regions of said external surface being adjacent one another and alternating along a length of said external surface of each of said rollers, said external surface of each of said rollers further comprising parallel sidewalls connecting said first regions to said second regions, and within each of said rollers, all of said sidewalls being parallel to each other.