| 摘要 |
<p>A spiral-binding punch (30) comprising a drive assembly (350) and a die assembly (40), engageable by the drive assembly, which is insertable and removable from the punch, as a unit, without disassembly of the punch or die assembly, thereby enabling easy replacement, or substitution, of the die assembly (40) by another die assembly capable of producing holes of a different size, of a different shape, of a different spacing between adjacent holes, and/or of a different distance relative to a paper edge. According to the preferred embodiment, the die assembly (40) is slidably receivable, in a lateral direction, through an opening (52) in a side of the punch (30) and includes a plurality of adjacent punch dies (300) which extend between upper and lower portions of the die assembly (40). A die assembly sensor (61), oriented so as to be contactable by a die assembly (40), interacts with the drive assembly (350) to automatically prevent operation of the punch and, hence, potential damage to the punch, when no die assembly is present within the punch.</p> |
