Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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clamp dwell

The time interval of the holding action of a CLAMP . Although "dwell time" may be controlled manually, as with the clamp of a hand-operated board chopper, the term relates more accurately to the automatic release of a clamp, such as in a BUILDING-IN MACHINE , which holds the pressure for a pre-set length of time. When a clamp does not release immediately upon completion of an operation, it is said to have a "long" dwell. The typical GUILLOTINE cutting machine has such a dwell; the clamp remains on the pile being cut until the knife has risen to a safe height, which prevents the knife from rippling the sheets on its return motion and thus disturbing the pile. (145 , 320 )

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