| 摘要 |
A spiral-binding punch comprising a drive assembly and a die assembly, 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 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 is slidably receivable, in a lateral direction, through an opening in a side of the punch and includes a plurality of adjacent punch dies which extend between upper and lower portions of the die assembly. A die assembly sensor, oriented so as to be contactable by a die assembly, interacts with the drive assembly to automatically prevent operation of the punch and, hence, potential damage to the punch, when no die assembly is present within the punch. The adjacent punch dies translate in a vertical plane when the upper portion of the die assembly translates bidirectionally relative to the lower portion of the die assembly in response to operation of a motor and linkage of the drive assembly. Paper sensors, strategically located within the die assembly and engageable by paper inserted into the punch, detect the presence of paper, detect whether or not the paper is in a proper position for punching, and interact with the drive assembly to automatically trigger a punching cycle. |
