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A projecting piece of iron on the near side of the frisket, by taking hold of which the pressman turns down the frisket, and at the same time the tympan; and as it projects a little beyond the tympan, he also raises the sheet off the form by grasping it and the tympan, and by a quick motion quits hold of the tympan, and turns up the frisket by means of the ear. It is sometimes called the Thumb Piece.
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