| 摘要 |
<p>Equipment (206) for transversal perforation, on the fly, of continuous forms in movement (211), comprising a perforating device (207) having a blade support (208) with a perforating blade (209,223a,223b), which is actuated for the rotation by a blade servomechanism (214) in synchronism with the form for the perforation. A contrast member (217) including active sections (219) and remaining inactive sections (221) is rotated by a contrast servomechanism (218) parallel to the blade support (208). In a condition of perforation, each active section, in synchronism with the form (211), can provide function of contrast for the blade (209,223a,223b). In a condition of non-perforation, each inactive section (221) is spaced away from a surface of movement (212) of the form, whereby avoiding the perforation on the passage of the blade.</p> |
