| 摘要 |
In a bookbinding machine, an image forming apparatus(50), a prebinding apparatus(100) and a bookbinding apparatus(200) are coupled on line in this order. In the prebinding apparatus(100), a sheet aligning section(135), a slitting section(160) which cuts off margins at both side portions of a sheet of paper, a cutting section(180) which cuts off top and bottom margins, and a creasing section(190) are arranged in this order. The prebinding apparatus(100) is provided with a control section(185) which sorts out supplied sheets of paper into those which need an SCC step and those which do not, and performs the SCC step only on the sheets of paper that need the SCC step.
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