| 摘要 |
A process for attaching one or more layers of materials to a base or backing having an anvil in its composition. A backing has incorporated therein an anvil strip of high impact material with formed depressions for clenching staples driven through the layer or layers to be attached. The anvil strip may be a metal strip embedded in the spine of a binder or may be formed by the boundary line of a relatively hard material and a relatively soft material through which a staple or tack may pass and the layers may be a stack of paper or signature sheets.
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