| 摘要 |
The invention provides a rotary punch assembly (10) for punching successive sheets of paper, the assembly comprising a first punch pin roller (12, 32) and a second roller (24, 44) which form a nip therebetween. The first punch pin roller (12, 32) has a plurality of punch pins (14) protruding therefrom and is driven, while the second roller (24, 44) has a resilient surface (26) and is freely rotating. As a sheet is passed through the nip between the rollers, the punch pins (14) penetrate the paper as the pins work against the resilient surface (26) of the second roller (24, 44) to pierce the holes.
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