Buffering apparatus for collations

A document handling apparatus, comprising a document transport buffering apparatus, the document transport buffering apparatus comprising:

• an array of drive belts, wherein each of the drive belts has a general continuous loop shape;
• an array of aligner belts, wherein the aligner belts are intermixed with the drive belts, wherein each of the aligner belts has a general continuous loop shape and a projection extending in a general cantilever fashion from the aligner belt;
• a first drive system adapted to rotate the drive belts;
• and
• a second drive system adapted to rotate the aligner belts, wherein the second drive system is adapted to rotate at least some of the aligner belts separately relative to each other,
• wherein the first and second drive systems are adapted to rotate the drive belts and the aligner belts such that a plurality of spaced stacks of documents are transported by the drive belts with one of the projections at a leading edge of each of the stacks and another one of the projections at a trailing edge of each of the stacks.