Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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A device on a board cutter, or similar device, consisting of a bar or rod with a weight or weights that are adjustable so that they can increase or decrease the counterbalancing effect on the blade. The rod or bar is an extension of the knife, and, by the action of gravity, works to prevent the knife from dropping and also assists in raising the knife following the cut. Although originally intended to enhance the usability of the blade, the counterbalance today is considered to be more of a safety device than a functional part of the cutting operation. (145 )

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