Folding
All happiness comes from the desire for others to be happy.
All misery comes from the desire for oneself to be happy.

Shantideva

The folding machine

Folding sheets into signatures. Printed sheets are loaded in the folder, which folds them into the shape of the finished book, consisting of a “signature” of 12, 16, or 32 pages. With a skilled operator, the machine can fold 8,000 sheets per hour.