Patent 7571902 was granted and assigned to Goss International on August, 2009 by the United States Patent and Trademark Office.
A sheet material conveying apparatus includes a plurality of pockets running along a track, each pocket having a bottom and a second bottom movable between a first location where the second bottom is over the bottom, and a second location where the second bottom is not located over the bottom. An actuator is located to a side of the pockets for moving the second bottom between the first and second locations. A related pocket and a method are also provided.