| 摘要 |
<p>A tape perforating head assembly (23) for scoring a perforated tear line in a piece of packaging tape joining article carriers together includes a headpiece (26), a plurality of perforating blades (31) supported on the headpiece (26) parallel to and adjacent one another, each perforating blade (31) having a series of serrated teeth constructed and arranged to score the perforated tear line in the packaging tape. Each perforating blade (31) is supported on the headpiece (26) for reciprocal movement with respect to one another into a normally extended position away from the headpiece, and into a retracted position on the headpiece (26). The tape perforating head assembly (23) also includes a spring (60) positioned within a bore (55) in which a guide pin is received, a pair of guide pins, and a pair of bores being provided for each perforating blade (31).</p> |
