| 摘要 |
Apparatus for handling sheet material comprising an array of punches (1) all in side-by-side relationship, an a corresponding array of dies (4) arranged opposite the array of punches (1). The arrays of punches and dies are operable to punch a row of holes in a marginal portion of a wad of sheets, card or the like, typically for subsequent binding on a comb, wire or spiral type binder or the like. During operation to punch apertures through the wad of sheets (6) the dies (4) are initiated to perform a forward stroke toward the (fixed) punches (1), thereby pinching the wad of paper between the tip (2) of punches (1) and the dial . . . of dies (4) therefor punching apertures through a wad of sheets (6). Following the forward stroke, the stroke direction of dies (4) is reversed, and dies (4) are pulled away from punches (2) towards their original retracted position in which the tips (2) of punches (1) are spaced from die apertures (3)). When the reverse stroke of dies (4) is completed, the wad of punched sheets (6) remains in position on the punches (1), such that punches (2) extend through the newly punched apertures and the wad of sheets (6), so that successive wads of sheets (6) can be introduced into the receiving zone between the tips (2) of punches (1) and the respective die apertures (3) of dies (4), permitting a number of successive wads of sheets (6) to be effectively lowered punches (1).
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