People who have to work with great sheafs of paper know that sorting and shuffling this material can be hard and frustrating work. Two sheets of paper, when pressed together, resist separation because viscous air finds it difficult to flow into the widening gap between them.
Today’s invention is therefore a printer which is capable of embossing a handful of pinhead sized marks into each sheet, forming an almost invisible sparsely-dotted line from one side to the other. The line for each sheet would lie at some random angle to the edge.
These dots serve to hold each sheet very slightly away from its neighbour and make the task of separating or shuffling adjacent ones very much easier (because the air gap thickness starts from a value greater than zero).